diff options
Diffstat (limited to 'drivers/rtc')
137 files changed, 21413 insertions, 5720 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 2883428d5ac..0754f5c7cb3 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -3,35 +3,39 @@ # config RTC_LIB - tristate + bool menuconfig RTC_CLASS - tristate "Real Time Clock" + bool "Real Time Clock" default n - depends on !S390 + depends on !S390 && !UML select RTC_LIB help Generic RTC class support. If you say yes here, you will be allowed to plug one or more RTCs to your system. You will probably want to enable one or more of the interfaces below. - This driver can also be built as a module. If so, the module - will be called rtc-core. - if RTC_CLASS config RTC_HCTOSYS bool "Set system time from RTC on startup and resume" - depends on RTC_CLASS = y default y help If you say yes here, the system time (wall clock) will be set using the value read from a specified RTC device. This is useful to avoid unnecessary fsck runs at boot time, and to network better. +config RTC_SYSTOHC + bool "Set the RTC time based on NTP synchronization" + default y + help + If you say yes here, the system time (wall clock) will be stored + in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11 + minutes if userspace reports synchronized NTP status. + config RTC_HCTOSYS_DEVICE string "RTC used to set the system time" - depends on RTC_HCTOSYS = y + depends on RTC_HCTOSYS = y || RTC_SYSTOHC = y default "rtc0" help The RTC device that will be used to (re)initialize the system @@ -54,7 +58,6 @@ config RTC_HCTOSYS_DEVICE config RTC_DEBUG bool "RTC debug support" - depends on RTC_CLASS = y help Say yes here to enable debugging support in the RTC framework and individual RTC drivers. @@ -72,13 +75,15 @@ config RTC_INTF_SYSFS If unsure, say Y. config RTC_INTF_PROC - boolean "/proc/driver/rtc (procfs for rtc0)" + boolean "/proc/driver/rtc (procfs for rtcN)" depends on PROC_FS default RTC_CLASS help - Say yes here if you want to use your first RTC through the proc - interface, /proc/driver/rtc. Other RTCs will not be available - through that API. + Say yes here if you want to use your system clock RTC through + the proc interface, /proc/driver/rtc. + Other RTCs will not be available through that API. + If there is no RTC for the system clock, then the first RTC(rtc0) + is used by default. If unsure, say Y. @@ -128,6 +133,36 @@ comment "I2C RTC drivers" if I2C +config RTC_DRV_88PM860X + tristate "Marvell 88PM860x" + depends on I2C && MFD_88PM860X + help + If you say yes here you get support for RTC function in Marvell + 88PM860x chips. + + This driver can also be built as a module. If so, the module + will be called rtc-88pm860x. + +config RTC_DRV_88PM80X + tristate "Marvell 88PM80x" + depends on I2C && MFD_88PM800 + help + If you say yes here you get support for RTC function in Marvell + 88PM80x chips. + + This driver can also be built as a module. If so, the module + will be called rtc-88pm80x. + +config RTC_DRV_AS3722 + tristate "ams AS3722 RTC driver" + depends on MFD_AS3722 + help + If you say yes here you get support for the RTC of ams AS3722 PMIC + chips. + + This driver can also be built as a module. If so, the module + will be called rtc-as3722. + config RTC_DRV_DS1307 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025" help @@ -148,7 +183,7 @@ config RTC_DRV_DS1307 config RTC_DRV_DS1374 tristate "Dallas/Maxim DS1374" - depends on RTC_CLASS && I2C + depends on I2C help If you say yes here you get support for Dallas Semiconductor DS1374 real-time clock chips. If an interrupt is associated @@ -168,7 +203,7 @@ config RTC_DRV_DS1672 config RTC_DRV_DS3232 tristate "Dallas/Maxim DS3232" - depends on RTC_CLASS && I2C + depends on I2C help If you say yes here you get support for Dallas Semiconductor DS3232 real-time clock chips. If an interrupt is associated @@ -177,6 +212,23 @@ config RTC_DRV_DS3232 This driver can also be built as a module. If so, the module will be called rtc-ds3232. +config RTC_DRV_HYM8563 + tristate "Haoyu Microelectronics HYM8563" + depends on I2C && OF + help + Say Y to enable support for the HYM8563 I2C RTC chip. Apart + from the usual rtc functions it provides a clock output of + up to 32kHz. + + This driver can also be built as a module. If so, the module + will be called rtc-hym8563. + +config RTC_DRV_LP8788 + tristate "TI LP8788 RTC driver" + depends on MFD_LP8788 + help + Say Y to enable support for the LP8788 RTC/ALARM driver. + config RTC_DRV_MAX6900 tristate "Maxim MAX6900" help @@ -186,6 +238,16 @@ config RTC_DRV_MAX6900 This driver can also be built as a module. If so, the module will be called rtc-max6900. +config RTC_DRV_MAX8907 + tristate "Maxim MAX8907" + depends on MFD_MAX8907 + help + If you say yes here you will get support for the + RTC of Maxim MAX8907 PMIC. + + This driver can also be built as a module. If so, the module + will be called rtc-max8907. + config RTC_DRV_MAX8925 tristate "Maxim MAX8925" depends on MFD_MAX8925 @@ -206,6 +268,26 @@ config RTC_DRV_MAX8998 This driver can also be built as a module. If so, the module will be called rtc-max8998. +config RTC_DRV_MAX8997 + tristate "Maxim MAX8997" + depends on MFD_MAX8997 + help + If you say yes here you will get support for the + RTC of Maxim MAX8997 PMIC. + + This driver can also be built as a module. If so, the module + will be called rtc-max8997. + +config RTC_DRV_MAX77686 + tristate "Maxim MAX77686" + depends on MFD_MAX77686 + help + If you say yes here you will get support for the + RTC of Maxim MAX77686 PMIC. + + This driver can also be built as a module. If so, the module + will be called rtc-max77686. + config RTC_DRV_RS5C372 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A" help @@ -233,6 +315,17 @@ config RTC_DRV_ISL12022 This driver can also be built as a module. If so, the module will be called rtc-isl12022. +config RTC_DRV_ISL12057 + depends on I2C + select REGMAP_I2C + tristate "Intersil ISL12057" + help + If you say yes here you get support for the Intersil ISL12057 + I2C RTC chip. + + This driver can also be built as a module. If so, the module + will be called rtc-isl12057. + config RTC_DRV_X1205 tristate "Xicor/Intersil X1205" help @@ -242,6 +335,34 @@ config RTC_DRV_X1205 This driver can also be built as a module. If so, the module will be called rtc-x1205. +config RTC_DRV_PALMAS + tristate "TI Palmas RTC driver" + depends on MFD_PALMAS + help + If you say yes here you get support for the RTC of TI PALMA series PMIC + chips. + + This driver can also be built as a module. If so, the module + will be called rtc-palma. + +config RTC_DRV_PCF2127 + tristate "NXP PCF2127" + help + If you say yes here you get support for the NXP PCF2127/29 RTC + chips. + + This driver can also be built as a module. If so, the module + will be called rtc-pcf2127. + +config RTC_DRV_PCF8523 + tristate "NXP PCF8523" + help + If you say yes here you get support for the NXP PCF8523 RTC + chips. + + This driver can also be built as a module. If so, the module + will be called rtc-pcf8523. + config RTC_DRV_PCF8563 tristate "Philips PCF8563/Epson RTC8564" help @@ -265,12 +386,12 @@ config RTC_DRV_PCF8583 will be called rtc-pcf8583. config RTC_DRV_M41T80 - tristate "ST M41T62/65/M41T80/81/82/83/84/85/87" + tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible" help If you say Y here you will get support for the ST M41T60 and M41T80 RTC chips series. Currently, the following chips are supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84, - M41ST85, and M41ST87. + M41ST85, M41ST87, and MicroCrystal RV4162. This driver can also be built as a module. If so, the module will be called rtc-m41t80. @@ -308,7 +429,7 @@ config RTC_DRV_TWL92330 config RTC_DRV_TWL4030 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0" - depends on RTC_CLASS && TWL4030_CORE + depends on TWL4030_CORE help If you say yes here you get support for the RTC on the TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms. @@ -316,6 +437,42 @@ config RTC_DRV_TWL4030 This driver can also be built as a module. If so, the module will be called rtc-twl. +config RTC_DRV_TPS6586X + tristate "TI TPS6586X RTC driver" + depends on MFD_TPS6586X + help + TI Power Management IC TPS6586X supports RTC functionality + along with alarm. This driver supports the RTC driver for + the TPS6586X RTC module. + +config RTC_DRV_TPS65910 + tristate "TI TPS65910 RTC driver" + depends on RTC_CLASS && MFD_TPS65910 + help + If you say yes here you get support for the RTC on the + TPS65910 chips. + + This driver can also be built as a module. If so, the module + will be called rtc-tps65910. + +config RTC_DRV_TPS80031 + tristate "TI TPS80031/TPS80032 RTC driver" + depends on MFD_TPS80031 + help + TI Power Management IC TPS80031 supports RTC functionality + along with alarm. This driver supports the RTC driver for + the TPS80031 RTC module. + +config RTC_DRV_RC5T583 + tristate "RICOH 5T583 RTC driver" + depends on MFD_RC5T583 + help + If you say yes here you get support for the RTC on the + RICOH 5T583 chips. + + This driver can also be built as a module. If so, the module + will be called rtc-rc5t583. + config RTC_DRV_S35390A tristate "Seiko Instruments S-35390A" select BITREVERSE @@ -354,12 +511,49 @@ config RTC_DRV_RX8025 This driver can also be built as a module. If so, the module will be called rtc-rx8025. +config RTC_DRV_EM3027 + tristate "EM Microelectronic EM3027" + help + If you say yes here you get support for the EM + Microelectronic EM3027 RTC chips. + + This driver can also be built as a module. If so, the module + will be called rtc-em3027. + +config RTC_DRV_RV3029C2 + tristate "Micro Crystal RTC" + help + If you say yes here you get support for the Micro Crystal + RV3029-C2 RTC chips. + + This driver can also be built as a module. If so, the module + will be called rtc-rv3029c2. + +config RTC_DRV_S5M + tristate "Samsung S2M/S5M series" + depends on MFD_SEC_CORE + help + If you say yes here you will get support for the + RTC of Samsung S2MPS14 and S5M PMIC series. + + This driver can also be built as a module. If so, the module + will be called rtc-s5m. + endif # I2C comment "SPI RTC drivers" if SPI_MASTER +config RTC_DRV_M41T93 + tristate "ST M41T93" + help + If you say yes here you will get support for the + ST M41T93 SPI RTC chip. + + This driver can also be built as a module. If so, the module + will be called rtc-m41t93. + config RTC_DRV_M41T94 tristate "ST M41T94" help @@ -379,6 +573,29 @@ config RTC_DRV_DS1305 This driver can also be built as a module. If so, the module will be called rtc-ds1305. +config RTC_DRV_DS1343 + select REGMAP_SPI + tristate "Dallas/Maxim DS1343/DS1344" + help + If you say yes here you get support for the + Dallas/Maxim DS1343 and DS1344 real time clock chips. + Support for trickle charger, alarm is provided. + + This driver can also be built as a module. If so, the module + will be called rtc-ds1343. + +config RTC_DRV_DS1347 + tristate "Dallas/Maxim DS1347" + help + If you say yes here you get support for the + Dallas/Maxim DS1347 chips. + + This driver only supports the RTC feature, and not other chip + features such as alarms. + + This driver can also be built as a module. If so, the module + will be called rtc-ds1347. + config RTC_DRV_DS1390 tristate "Dallas/Maxim DS1390/93/94" help @@ -436,6 +653,22 @@ config RTC_DRV_PCF2123 This driver can also be built as a module. If so, the module will be called rtc-pcf2123. +config RTC_DRV_RX4581 + tristate "Epson RX-4581" + help + If you say yes here you will get support for the Epson RX-4581. + + This driver can also be built as a module. If so the module + will be called rtc-rx4581. + +config RTC_DRV_MCP795 + tristate "Microchip MCP795" + help + If you say yes here you will get support for the Microchip MCP795. + + This driver can also be built as a module. If so the module + will be called rtc-mcp795. + endif # SPI_MASTER comment "Platform RTC drivers" @@ -446,7 +679,7 @@ comment "Platform RTC drivers" config RTC_DRV_CMOS tristate "PC-style 'CMOS'" - depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64 + depends on X86 || ARM || M32R || PPC || MIPS || SPARC64 default y if X86 help Say "yes" here to get direct support for the real time clock @@ -463,6 +696,26 @@ config RTC_DRV_CMOS This driver can also be built as a module. If so, the module will be called rtc-cmos. +config RTC_DRV_ALPHA + bool "Alpha PC-style CMOS" + depends on ALPHA + default y + help + Direct support for the real-time clock found on every Alpha + system, specifically MC146818 compatibles. If in doubt, say Y. + +config RTC_DRV_VRTC + tristate "Virtual RTC for Intel MID platforms" + depends on X86_INTEL_MID + default y if X86_INTEL_MID + + help + Say "yes" here to get direct support for the real time clock + found on Moorestown platforms. The VRTC is a emulated RTC that + derives its clock source from a real RTC in the PMIC. The MC146818 + style programming interface is mostly conserved, but any + updates are done via IPC calls to the system controller FW. + config RTC_DRV_DS1216 tristate "Dallas DS1216" depends on SNI_RM @@ -482,7 +735,6 @@ config RTC_DRV_DS1302 config RTC_DRV_DS1511 tristate "Dallas DS1511" - depends on RTC_CLASS help If you say yes here you get support for the Dallas DS1511 timekeeping/watchdog chip. @@ -508,6 +760,33 @@ config RTC_DRV_DS1742 This driver can also be built as a module. If so, the module will be called rtc-ds1742. +config RTC_DRV_DA9052 + tristate "Dialog DA9052/DA9053 RTC" + depends on PMIC_DA9052 + help + Say y here to support the RTC driver for Dialog Semiconductor + DA9052-BC and DA9053-AA/Bx PMICs. + +config RTC_DRV_DA9055 + tristate "Dialog Semiconductor DA9055 RTC" + depends on MFD_DA9055 + help + If you say yes here you will get support for the + RTC of the Dialog DA9055 PMIC. + + This driver can also be built as a module. If so, the module + will be called rtc-da9055 + +config RTC_DRV_DA9063 + tristate "Dialog Semiconductor DA9063 RTC" + depends on MFD_DA9063 + help + If you say yes here you will get support for the RTC subsystem + of the Dialog Semiconductor DA9063. + + This driver can also be built as a module. If so, the module + will be called "rtc-da9063". + config RTC_DRV_EFI tristate "EFI RTC" depends on IA64 @@ -520,7 +799,6 @@ config RTC_DRV_EFI config RTC_DRV_STK17TA8 tristate "Simtek STK17TA8" - depends on RTC_CLASS help If you say yes here you get support for the Simtek STK17TA8 timekeeping chip. @@ -567,27 +845,6 @@ config RTC_DRV_MSM6242 This driver can also be built as a module. If so, the module will be called rtc-msm6242. -config RTC_DRV_IMXDI - tristate "Freescale IMX DryIce Real Time Clock" - depends on ARCH_MX25 - depends on RTC_CLASS - help - Support for Freescale IMX DryIce RTC - - This driver can also be built as a module, if so, the module - will be called "rtc-imxdi". - -config RTC_MXC - tristate "Freescale MXC Real Time Clock" - depends on ARCH_MXC - depends on RTC_CLASS - help - If you say yes here you get support for the Freescale MXC - RTC module. - - This driver can also be built as a module, if so, the module - will be called "rtc-mxc". - config RTC_DRV_BQ4802 tristate "TI BQ4802" help @@ -616,6 +873,15 @@ config RTC_DRV_V3020 This driver can also be built as a module. If so, the module will be called rtc-v3020. +config RTC_DRV_DS2404 + tristate "Dallas DS2404" + help + If you say yes here you get support for the + Dallas DS2404 RTC chip. + + This driver can also be built as a module. If so, the module + will be called rtc-ds2404. + config RTC_DRV_WM831X tristate "Wolfson Microelectronics WM831x RTC" depends on MFD_WM831X @@ -636,6 +902,14 @@ config RTC_DRV_WM8350 This driver can also be built as a module. If so, the module will be called "rtc-wm8350". +config RTC_DRV_SPEAR + tristate "SPEAR ST RTC" + depends on PLAT_SPEAR + default y + help + If you say Y here you will get support for the RTC found on + spear + config RTC_DRV_PCF50633 depends on MFD_PCF50633 tristate "NXP PCF50633 RTC" @@ -654,13 +928,15 @@ config RTC_DRV_AB3100 config RTC_DRV_AB8500 tristate "ST-Ericsson AB8500 RTC" depends on AB8500_CORE + select RTC_INTF_DEV + select RTC_INTF_DEV_UIE_EMUL help Select this to enable the ST-Ericsson AB8500 power management IC RTC support. This chip contains a battery- and capacitor-backed RTC. config RTC_DRV_NUC900 tristate "NUC910/NUC920 RTC driver" - depends on RTC_CLASS && ARCH_W90X900 + depends on ARCH_W90X900 help If you say yes here you get support for the RTC subsystem of the NUC910/NUC920 used in embedded systems. @@ -677,13 +953,24 @@ config RTC_DRV_DAVINCI This driver can also be built as a module. If so, the module will be called rtc-davinci. +config RTC_DRV_IMXDI + tristate "Freescale IMX DryIce Real Time Clock" + depends on ARCH_MXC + help + Support for Freescale IMX DryIce RTC + + This driver can also be built as a module, if so, the module + will be called "rtc-imxdi". + config RTC_DRV_OMAP tristate "TI OMAP1" - depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX + depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX || SOC_AM33XX help - Say "yes" here to support the real time clock on TI OMAP1 and - DA8xx/OMAP-L13x chips. This driver can also be built as a - module called rtc-omap. + Say "yes" here to support the on chip real time clock + present on TI OMAP1, AM33xx and DA8xx/OMAP-L13x. + + This driver can also be built as a module, if so, module + will be called rtc-omap. config HAVE_S3C_RTC bool @@ -694,7 +981,7 @@ config HAVE_S3C_RTC config RTC_DRV_S3C tristate "Samsung S3C series SoC RTC" - depends on ARCH_S3C2410 || ARCH_S3C64XX || HAVE_S3C_RTC + depends on ARCH_S3C64XX || HAVE_S3C_RTC help RTC (Realtime Clock) driver for the clock inbuilt into the Samsung S3C24XX series of SoCs. This can provide periodic @@ -719,8 +1006,8 @@ config RTC_DRV_EP93XX will be called rtc-ep93xx. config RTC_DRV_SA1100 - tristate "SA11x0/PXA2xx" - depends on ARCH_SA1100 || ARCH_PXA + tristate "SA11x0/PXA2xx/PXA910" + depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP help If you say Y here you will get access to the real time clock built into your SA11x0 or PXA2xx CPU. @@ -730,7 +1017,7 @@ config RTC_DRV_SA1100 config RTC_DRV_SH tristate "SuperH On-Chip RTC" - depends on RTC_CLASS && SUPERH && HAVE_CLK + depends on SUPERH && HAVE_CLK help Say Y here to enable support for the on-chip RTC found in most SuperH processors. @@ -777,7 +1064,7 @@ config RTC_DRV_AT32AP700X config RTC_DRV_AT91RM9200 tristate "AT91RM9200 or some AT91SAM9 RTC" - depends on ARCH_AT91RM9200 || ARCH_AT91SAM9RL || ARCH_AT91SAM9G45 + depends on ARCH_AT91 help Driver for the internal RTC (Realtime Clock) module found on Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips @@ -865,6 +1152,13 @@ config RTC_DRV_PXA This RTC driver uses PXA RTC registers available since pxa27x series (RDxR, RYxR) instead of legacy RCNR, RTAR. +config RTC_DRV_VT8500 + tristate "VIA/WonderMedia 85xx SoC RTC" + depends on ARCH_VT8500 + help + If you say Y here you will get access to the real time clock + built into your VIA VT8500 SoC or its relatives. + config RTC_DRV_SUN4V bool "SUN4V Hypervisor RTC" @@ -873,6 +1167,13 @@ config RTC_DRV_SUN4V If you say Y here you will get support for the Hypervisor based RTC on SUN4V systems. +config RTC_DRV_SUNXI + tristate "Allwinner sun4i/sun7i RTC" + depends on ARCH_SUNXI + help + If you say Y here you will get support for the RTC found on + Allwinner A10/A20. + config RTC_DRV_STARFIRE bool "Starfire RTC" depends on SPARC64 @@ -889,7 +1190,7 @@ config RTC_DRV_TX4939 config RTC_DRV_MV tristate "Marvell SoC RTC" - depends on ARCH_KIRKWOOD || ARCH_DOVE + depends on ARCH_KIRKWOOD || ARCH_DOVE || ARCH_MVEBU help If you say yes here you will get support for the in-chip RTC that can be found in some of Marvell's SoC devices, such as @@ -920,11 +1221,11 @@ config RTC_DRV_COH901331 config RTC_DRV_STMP - tristate "Freescale STMP3xxx RTC" - depends on ARCH_STMP3XXX + tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC" + depends on ARCH_MXS help If you say yes here you will get support for the onboard - STMP3xxx RTC. + STMP3xxx/i.MX23/i.MX28 RTC. This driver can also be built as a module. If so, the module will be called rtc-stmp3xxx. @@ -945,17 +1246,16 @@ config RTC_DRV_MC13XXX config RTC_DRV_MPC5121 tristate "Freescale MPC5121 built-in RTC" - depends on PPC_MPC512x && RTC_CLASS + depends on PPC_MPC512x || PPC_MPC52xx help If you say yes here you will get support for the - built-in RTC MPC5121. + built-in RTC on MPC5121 or on MPC5200. This driver can also be built as a module. If so, the module will be called rtc-mpc5121. config RTC_DRV_JZ4740 tristate "Ingenic JZ4740 SoC" - depends on RTC_CLASS depends on MACH_JZ4740 help If you say yes here you get support for the Ingenic JZ4740 SoC RTC @@ -973,4 +1273,112 @@ config RTC_DRV_LPC32XX This driver can also be buillt as a module. If so, the module will be called rtc-lpc32xx. +config RTC_DRV_PM8XXX + tristate "Qualcomm PMIC8XXX RTC" + depends on MFD_PM8XXX + help + If you say yes here you get support for the + Qualcomm PMIC8XXX RTC. + + To compile this driver as a module, choose M here: the + module will be called rtc-pm8xxx. + +config RTC_DRV_TEGRA + tristate "NVIDIA Tegra Internal RTC driver" + depends on ARCH_TEGRA + help + If you say yes here you get support for the + Tegra 200 series internal RTC module. + + This drive can also be built as a module. If so, the module + will be called rtc-tegra. + +config RTC_DRV_TILE + tristate "Tilera hypervisor RTC support" + depends on TILE + help + Enable support for the Linux driver side of the Tilera + hypervisor's real-time clock interface. + +config RTC_DRV_PUV3 + tristate "PKUnity v3 RTC support" + depends on ARCH_PUV3 + help + This enables support for the RTC in the PKUnity-v3 SoCs. + + This drive can also be built as a module. If so, the module + will be called rtc-puv3. + +config RTC_DRV_LOONGSON1 + tristate "loongson1 RTC support" + depends on MACH_LOONGSON1 + help + This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year + counter) to be used as a RTC. + + This driver can also be built as a module. If so, the module + will be called rtc-ls1x. + +config RTC_DRV_MXC + tristate "Freescale MXC Real Time Clock" + depends on ARCH_MXC + help + If you say yes here you get support for the Freescale MXC + RTC module. + + This driver can also be built as a module, if so, the module + will be called "rtc-mxc". + +config RTC_DRV_SNVS + tristate "Freescale SNVS RTC support" + depends on HAS_IOMEM + depends on OF + help + If you say yes here you get support for the Freescale SNVS + Low Power (LP) RTC module. + + This driver can also be built as a module, if so, the module + will be called "rtc-snvs". + +config RTC_DRV_SIRFSOC + tristate "SiRFSOC RTC" + depends on ARCH_SIRF + help + Say "yes" here to support the real time clock on SiRF SOC chips. + This driver can also be built as a module called rtc-sirfsoc. + +config RTC_DRV_MOXART + tristate "MOXA ART RTC" + help + If you say yes here you get support for the MOXA ART + RTC module. + + This driver can also be built as a module. If so, the module + will be called rtc-moxart + +config RTC_DRV_XGENE + tristate "APM X-Gene RTC" + help + If you say yes here you get support for the APM X-Gene SoC real time + clock. + + This driver can also be built as a module, if so, the module + will be called "rtc-xgene". + +comment "HID Sensor RTC drivers" + +config RTC_DRV_HID_SENSOR_TIME + tristate "HID Sensor Time" + depends on USB_HID + select IIO + select HID_SENSOR_HUB + select HID_SENSOR_IIO_COMMON + help + Say yes here to build support for the HID Sensors of type Time. + This drivers makes such sensors available as RTCs. + + If this driver is compiled as a module, it will be named + rtc-hid-sensor-time. + + endif # RTC_CLASS diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 4c2832df469..70347d041d1 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -2,12 +2,11 @@ # Makefile for RTC class/drivers. # -ifeq ($(CONFIG_RTC_DEBUG),y) - EXTRA_CFLAGS += -DDEBUG -endif +ccflags-$(CONFIG_RTC_DEBUG) := -DDEBUG obj-$(CONFIG_RTC_LIB) += rtc-lib.o obj-$(CONFIG_RTC_HCTOSYS) += hctosys.o +obj-$(CONFIG_RTC_SYSTOHC) += systohc.o obj-$(CONFIG_RTC_CLASS) += rtc-core.o rtc-core-y := class.o interface.o @@ -17,8 +16,11 @@ rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o # Keep the list ordered. +obj-$(CONFIG_RTC_DRV_88PM860X) += rtc-88pm860x.o +obj-$(CONFIG_RTC_DRV_88PM80X) += rtc-88pm80x.o obj-$(CONFIG_RTC_DRV_AB3100) += rtc-ab3100.o obj-$(CONFIG_RTC_DRV_AB8500) += rtc-ab8500.o +obj-$(CONFIG_RTC_DRV_AS3722) += rtc-as3722.o obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o obj-$(CONFIG_RTC_DRV_AT91SAM9) += rtc-at91sam9.o @@ -28,75 +30,114 @@ obj-$(CONFIG_RTC_DRV_BQ32K) += rtc-bq32k.o obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o +obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o +obj-$(CONFIG_RTC_DRV_DA9055) += rtc-da9055.o +obj-$(CONFIG_RTC_DRV_DA9063) += rtc-da9063.o obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o +obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o obj-$(CONFIG_RTC_DRV_DS1286) += rtc-ds1286.o obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o obj-$(CONFIG_RTC_DRV_DS1305) += rtc-ds1305.o obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o +obj-$(CONFIG_RTC_DRV_DS1343) += rtc-ds1343.o +obj-$(CONFIG_RTC_DRV_DS1347) += rtc-ds1347.o obj-$(CONFIG_RTC_DRV_DS1374) += rtc-ds1374.o obj-$(CONFIG_RTC_DRV_DS1390) += rtc-ds1390.o obj-$(CONFIG_RTC_DRV_DS1511) += rtc-ds1511.o obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o +obj-$(CONFIG_RTC_DRV_DS2404) += rtc-ds2404.o obj-$(CONFIG_RTC_DRV_DS3232) += rtc-ds3232.o obj-$(CONFIG_RTC_DRV_DS3234) += rtc-ds3234.o obj-$(CONFIG_RTC_DRV_EFI) += rtc-efi.o +obj-$(CONFIG_RTC_DRV_EM3027) += rtc-em3027.o obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o +obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o +obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o +obj-$(CONFIG_RTC_DRV_ISL12057) += rtc-isl12057.o obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o +obj-$(CONFIG_RTC_DRV_LP8788) += rtc-lp8788.o obj-$(CONFIG_RTC_DRV_LPC32XX) += rtc-lpc32xx.o +obj-$(CONFIG_RTC_DRV_LOONGSON1) += rtc-ls1x.o obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o +obj-$(CONFIG_RTC_DRV_M41T93) += rtc-m41t93.o obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o obj-$(CONFIG_RTC_DRV_M48T35) += rtc-m48t35.o obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o -obj-$(CONFIG_RTC_MXC) += rtc-mxc.o +obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o +obj-$(CONFIG_RTC_DRV_MAX8907) += rtc-max8907.o obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o +obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o +obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o +obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o obj-$(CONFIG_RTC_DRV_NUC900) += rtc-nuc900.o obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o +obj-$(CONFIG_RTC_DRV_PALMAS) += rtc-palmas.o obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o +obj-$(CONFIG_RTC_DRV_PCF2127) += rtc-pcf2127.o +obj-$(CONFIG_RTC_DRV_PCF8523) += rtc-pcf8523.o obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o obj-$(CONFIG_RTC_DRV_PL030) += rtc-pl030.o obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o +obj-$(CONFIG_RTC_DRV_PM8XXX) += rtc-pm8xxx.o obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o +obj-$(CONFIG_RTC_DRV_PUV3) += rtc-puv3.o obj-$(CONFIG_RTC_DRV_PXA) += rtc-pxa.o obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o +obj-$(CONFIG_RTC_DRV_RC5T583) += rtc-rc5t583.o obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c01.o obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o +obj-$(CONFIG_RTC_DRV_RV3029C2) += rtc-rv3029c2.o +obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o obj-$(CONFIG_RTC_DRV_RX8025) += rtc-rx8025.o obj-$(CONFIG_RTC_DRV_RX8581) += rtc-rx8581.o obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o +obj-$(CONFIG_RTC_DRV_S5M) += rtc-s5m.o obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o +obj-$(CONFIG_RTC_DRV_SNVS) += rtc-snvs.o +obj-$(CONFIG_RTC_DRV_SPEAR) += rtc-spear.o obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o obj-$(CONFIG_RTC_DRV_STMP) += rtc-stmp3xxx.o obj-$(CONFIG_RTC_DRV_SUN4V) += rtc-sun4v.o +obj-$(CONFIG_RTC_DRV_SUNXI) += rtc-sunxi.o +obj-$(CONFIG_RTC_DRV_TEGRA) += rtc-tegra.o obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o +obj-$(CONFIG_RTC_DRV_TILE) += rtc-tile.o obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl.o +obj-$(CONFIG_RTC_DRV_TPS6586X) += rtc-tps6586x.o +obj-$(CONFIG_RTC_DRV_TPS65910) += rtc-tps65910.o +obj-$(CONFIG_RTC_DRV_TPS80031) += rtc-tps80031.o obj-$(CONFIG_RTC_DRV_TX4939) += rtc-tx4939.o obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o +obj-$(CONFIG_RTC_DRV_VT8500) += rtc-vt8500.o obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm831x.o obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o +obj-$(CONFIG_RTC_DRV_XGENE) += rtc-xgene.o +obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o +obj-$(CONFIG_RTC_DRV_MOXART) += rtc-moxart.o diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index e6539cbabb3..589351ef75d 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -11,54 +11,79 @@ * published by the Free Software Foundation. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/module.h> +#include <linux/of.h> #include <linux/rtc.h> #include <linux/kdev_t.h> #include <linux/idr.h> #include <linux/slab.h> +#include <linux/workqueue.h> #include "rtc-core.h" -static DEFINE_IDR(rtc_idr); -static DEFINE_MUTEX(idr_lock); +static DEFINE_IDA(rtc_ida); struct class *rtc_class; static void rtc_device_release(struct device *dev) { struct rtc_device *rtc = to_rtc_device(dev); - mutex_lock(&idr_lock); - idr_remove(&rtc_idr, rtc->id); - mutex_unlock(&idr_lock); + ida_simple_remove(&rtc_ida, rtc->id); kfree(rtc); } -#if defined(CONFIG_PM) && defined(CONFIG_RTC_HCTOSYS_DEVICE) +#ifdef CONFIG_RTC_HCTOSYS_DEVICE +/* Result of the last RTC to system clock attempt. */ +int rtc_hctosys_ret = -ENODEV; +#endif +#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_RTC_HCTOSYS_DEVICE) /* * On suspend(), measure the delta between one RTC and the * system's wall clock; restore it on resume(). */ -static struct timespec delta; -static time_t oldtime; +static struct timespec old_rtc, old_system, old_delta; -static int rtc_suspend(struct device *dev, pm_message_t mesg) + +static int rtc_suspend(struct device *dev) { struct rtc_device *rtc = to_rtc_device(dev); struct rtc_time tm; - struct timespec ts = current_kernel_time(); + struct timespec delta, delta_delta; + + if (has_persistent_clock()) + return 0; if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) return 0; + /* snapshot the current RTC and system time at suspend*/ rtc_read_time(rtc, &tm); - rtc_tm_to_time(&tm, &oldtime); + getnstimeofday(&old_system); + rtc_tm_to_time(&tm, &old_rtc.tv_sec); - /* RTC precision is 1 second; adjust delta for avg 1/2 sec err */ - set_normalized_timespec(&delta, - ts.tv_sec - oldtime, - ts.tv_nsec - (NSEC_PER_SEC >> 1)); + + /* + * To avoid drift caused by repeated suspend/resumes, + * which each can add ~1 second drift error, + * try to compensate so the difference in system time + * and rtc time stays close to constant. + */ + delta = timespec_sub(old_system, old_rtc); + delta_delta = timespec_sub(delta, old_delta); + if (delta_delta.tv_sec < -2 || delta_delta.tv_sec >= 2) { + /* + * if delta_delta is too large, assume time correction + * has occured and set old_delta to the current delta. + */ + old_delta = delta; + } else { + /* Otherwise try to adjust old_system to compensate */ + old_system = timespec_sub(old_system, delta_delta); + } return 0; } @@ -67,38 +92,54 @@ static int rtc_resume(struct device *dev) { struct rtc_device *rtc = to_rtc_device(dev); struct rtc_time tm; - time_t newtime; - struct timespec time; + struct timespec new_system, new_rtc; + struct timespec sleep_time; + + if (has_persistent_clock()) + return 0; + rtc_hctosys_ret = -ENODEV; if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) return 0; + /* snapshot the current rtc and system time at resume */ + getnstimeofday(&new_system); rtc_read_time(rtc, &tm); if (rtc_valid_tm(&tm) != 0) { pr_debug("%s: bogus resume time\n", dev_name(&rtc->dev)); return 0; } - rtc_tm_to_time(&tm, &newtime); - if (newtime <= oldtime) { - if (newtime < oldtime) - pr_debug("%s: time travel!\n", dev_name(&rtc->dev)); + rtc_tm_to_time(&tm, &new_rtc.tv_sec); + new_rtc.tv_nsec = 0; + + if (new_rtc.tv_sec < old_rtc.tv_sec) { + pr_debug("%s: time travel!\n", dev_name(&rtc->dev)); return 0; } - /* restore wall clock using delta against this RTC; - * adjust again for avg 1/2 second RTC sampling error + /* calculate the RTC time delta (sleep time)*/ + sleep_time = timespec_sub(new_rtc, old_rtc); + + /* + * Since these RTC suspend/resume handlers are not called + * at the very end of suspend or the start of resume, + * some run-time may pass on either sides of the sleep time + * so subtract kernel run-time between rtc_suspend to rtc_resume + * to keep things accurate. */ - set_normalized_timespec(&time, - newtime + delta.tv_sec, - (NSEC_PER_SEC >> 1) + delta.tv_nsec); - do_settimeofday(&time); + sleep_time = timespec_sub(sleep_time, + timespec_sub(new_system, old_system)); + if (sleep_time.tv_sec >= 0) + timekeeping_inject_sleeptime(&sleep_time); + rtc_hctosys_ret = 0; return 0; } +static SIMPLE_DEV_PM_OPS(rtc_class_dev_pm_ops, rtc_suspend, rtc_resume); +#define RTC_CLASS_DEV_PM_OPS (&rtc_class_dev_pm_ops) #else -#define rtc_suspend NULL -#define rtc_resume NULL +#define RTC_CLASS_DEV_PM_OPS NULL #endif @@ -116,32 +157,40 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, struct module *owner) { struct rtc_device *rtc; - int id, err; - - if (idr_pre_get(&rtc_idr, GFP_KERNEL) == 0) { - err = -ENOMEM; - goto exit; + struct rtc_wkalrm alrm; + int of_id = -1, id = -1, err; + + if (dev->of_node) + of_id = of_alias_get_id(dev->of_node, "rtc"); + else if (dev->parent && dev->parent->of_node) + of_id = of_alias_get_id(dev->parent->of_node, "rtc"); + + if (of_id >= 0) { + id = ida_simple_get(&rtc_ida, of_id, of_id + 1, + GFP_KERNEL); + if (id < 0) + dev_warn(dev, "/aliases ID %d not available\n", + of_id); } - - mutex_lock(&idr_lock); - err = idr_get_new(&rtc_idr, NULL, &id); - mutex_unlock(&idr_lock); - - if (err < 0) - goto exit; - - id = id & MAX_ID_MASK; + if (id < 0) { + id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL); + if (id < 0) { + err = id; + goto exit; + } + } rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL); if (rtc == NULL) { err = -ENOMEM; - goto exit_idr; + goto exit_ida; } rtc->id = id; rtc->ops = ops; rtc->owner = owner; + rtc->irq_freq = 1; rtc->max_user_freq = 64; rtc->dev.parent = dev; rtc->dev.class = rtc_class; @@ -152,6 +201,24 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, spin_lock_init(&rtc->irq_task_lock); init_waitqueue_head(&rtc->irq_queue); + /* Init timerqueue */ + timerqueue_init_head(&rtc->timerqueue); + INIT_WORK(&rtc->irqwork, rtc_timer_do_work); + /* Init aie timer */ + rtc_timer_init(&rtc->aie_timer, rtc_aie_update_irq, (void *)rtc); + /* Init uie timer */ + rtc_timer_init(&rtc->uie_rtctimer, rtc_uie_update_irq, (void *)rtc); + /* Init pie timer */ + hrtimer_init(&rtc->pie_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + rtc->pie_timer.function = rtc_pie_update_irq; + rtc->pie_enabled = 0; + + /* Check to see if there is an ALARM already set in hw */ + err = __rtc_read_alarm(rtc, &alrm); + + if (!err && !rtc_valid_tm(&alrm.time)) + rtc_initialize_alarm(rtc, &alrm); + strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE); dev_set_name(&rtc->dev, "rtc%d", id); @@ -175,10 +242,8 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, exit_kfree: kfree(rtc); -exit_idr: - mutex_lock(&idr_lock); - idr_remove(&rtc_idr, id); - mutex_unlock(&idr_lock); +exit_ida: + ida_simple_remove(&rtc_ida, id); exit: dev_err(dev, "rtc core: unable to register %s, err = %d\n", @@ -211,15 +276,84 @@ void rtc_device_unregister(struct rtc_device *rtc) } EXPORT_SYMBOL_GPL(rtc_device_unregister); +static void devm_rtc_device_release(struct device *dev, void *res) +{ + struct rtc_device *rtc = *(struct rtc_device **)res; + + rtc_device_unregister(rtc); +} + +static int devm_rtc_device_match(struct device *dev, void *res, void *data) +{ + struct rtc **r = res; + + return *r == data; +} + +/** + * devm_rtc_device_register - resource managed rtc_device_register() + * @dev: the device to register + * @name: the name of the device + * @ops: the rtc operations structure + * @owner: the module owner + * + * @return a struct rtc on success, or an ERR_PTR on error + * + * Managed rtc_device_register(). The rtc_device returned from this function + * are automatically freed on driver detach. See rtc_device_register() + * for more information. + */ + +struct rtc_device *devm_rtc_device_register(struct device *dev, + const char *name, + const struct rtc_class_ops *ops, + struct module *owner) +{ + struct rtc_device **ptr, *rtc; + + ptr = devres_alloc(devm_rtc_device_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + rtc = rtc_device_register(name, dev, ops, owner); + if (!IS_ERR(rtc)) { + *ptr = rtc; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return rtc; +} +EXPORT_SYMBOL_GPL(devm_rtc_device_register); + +/** + * devm_rtc_device_unregister - resource managed devm_rtc_device_unregister() + * @dev: the device to unregister + * @rtc: the RTC class device to unregister + * + * Deallocated a rtc allocated with devm_rtc_device_register(). Normally this + * function will not need to be called and the resource management code will + * ensure that the resource is freed. + */ +void devm_rtc_device_unregister(struct device *dev, struct rtc_device *rtc) +{ + int rc; + + rc = devres_release(dev, devm_rtc_device_release, + devm_rtc_device_match, rtc); + WARN_ON(rc); +} +EXPORT_SYMBOL_GPL(devm_rtc_device_unregister); + static int __init rtc_init(void) { rtc_class = class_create(THIS_MODULE, "rtc"); if (IS_ERR(rtc_class)) { - printk(KERN_ERR "%s: couldn't create class\n", __FILE__); + pr_err("couldn't create class\n"); return PTR_ERR(rtc_class); } - rtc_class->suspend = rtc_suspend; - rtc_class->resume = rtc_resume; + rtc_class->pm = RTC_CLASS_DEV_PM_OPS; rtc_dev_init(); rtc_sysfs_init(rtc_class); return 0; @@ -229,7 +363,7 @@ static void __exit rtc_exit(void) { rtc_dev_exit(); class_destroy(rtc_class); - idr_destroy(&rtc_idr); + ida_destroy(&rtc_ida); } subsys_initcall(rtc_init); diff --git a/drivers/rtc/hctosys.c b/drivers/rtc/hctosys.c index bc90b091f19..4aa60d74004 100644 --- a/drivers/rtc/hctosys.c +++ b/drivers/rtc/hctosys.c @@ -22,8 +22,6 @@ * the best guess is to add 0.5s. */ -int rtc_hctosys_ret = -ENODEV; - static int __init rtc_hctosys(void) { int err = -ENODEV; @@ -56,7 +54,7 @@ static int __init rtc_hctosys(void) rtc_tm_to_time(&tm, &tv.tv_sec); - do_settimeofday(&tv); + err = do_settimeofday(&tv); dev_info(rtc->dev.parent, "setting system clock to " diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index a0c816238aa..5813fa52c3d 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -13,16 +13,16 @@ #include <linux/rtc.h> #include <linux/sched.h> +#include <linux/module.h> #include <linux/log2.h> +#include <linux/workqueue.h> -int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm) +static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer); +static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer); + +static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm) { int err; - - err = mutex_lock_interruptible(&rtc->ops_lock); - if (err) - return err; - if (!rtc->ops) err = -ENODEV; else if (!rtc->ops->read_time) @@ -31,7 +31,18 @@ int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm) memset(tm, 0, sizeof(struct rtc_time)); err = rtc->ops->read_time(rtc->dev.parent, tm); } + return err; +} + +int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm) +{ + int err; + + err = mutex_lock_interruptible(&rtc->ops_lock); + if (err) + return err; + err = __rtc_read_time(rtc, tm); mutex_unlock(&rtc->ops_lock); return err; } @@ -61,7 +72,10 @@ int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm) } else err = -EINVAL; + pm_stay_awake(rtc->dev.parent); mutex_unlock(&rtc->ops_lock); + /* A timer might have just expired */ + schedule_work(&rtc->irqwork); return err; } EXPORT_SYMBOL_GPL(rtc_set_time); @@ -96,11 +110,14 @@ int rtc_set_mmss(struct rtc_device *rtc, unsigned long secs) err = rtc->ops->set_time(rtc->dev.parent, &new); } - } - else + } else { err = -EINVAL; + } + pm_stay_awake(rtc->dev.parent); mutex_unlock(&rtc->ops_lock); + /* A timer might have just expired */ + schedule_work(&rtc->irqwork); return err; } @@ -127,7 +144,7 @@ static int rtc_read_alarm_internal(struct rtc_device *rtc, struct rtc_wkalrm *al return err; } -int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) +int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) { int err; struct rtc_time before, now; @@ -190,8 +207,6 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) err = rtc_read_alarm_internal(rtc, alarm); if (err) return err; - if (!alarm->enabled) - return 0; /* full-function RTCs won't have such missing fields */ if (rtc_valid_tm(&alarm->time) == 0) @@ -219,11 +234,11 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) alarm->time.tm_hour = now.tm_hour; /* For simplicity, only support date rollover for now */ - if (alarm->time.tm_mday == -1) { + if (alarm->time.tm_mday < 1 || alarm->time.tm_mday > 31) { alarm->time.tm_mday = now.tm_mday; missing = day; } - if (alarm->time.tm_mon == -1) { + if ((unsigned)alarm->time.tm_mon >= 12) { alarm->time.tm_mon = now.tm_mon; if (missing == none) missing = month; @@ -277,7 +292,8 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year"); do { alarm->time.tm_year++; - } while (rtc_valid_tm(&alarm->time) != 0); + } while (!is_leap_year(alarm->time.tm_year + 1900) + && rtc_valid_tm(&alarm->time) != 0); break; default: @@ -285,21 +301,62 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) } done: - return 0; + err = rtc_valid_tm(&alarm->time); + + if (err) { + dev_warn(&rtc->dev, "invalid alarm value: %d-%d-%d %d:%d:%d\n", + alarm->time.tm_year + 1900, alarm->time.tm_mon + 1, + alarm->time.tm_mday, alarm->time.tm_hour, alarm->time.tm_min, + alarm->time.tm_sec); + } + + return err; } -EXPORT_SYMBOL_GPL(rtc_read_alarm); -int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) +int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) { int err; - err = rtc_valid_tm(&alarm->time); - if (err != 0) + err = mutex_lock_interruptible(&rtc->ops_lock); + if (err) return err; + if (rtc->ops == NULL) + err = -ENODEV; + else if (!rtc->ops->read_alarm) + err = -EINVAL; + else { + memset(alarm, 0, sizeof(struct rtc_wkalrm)); + alarm->enabled = rtc->aie_timer.enabled; + alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires); + } + mutex_unlock(&rtc->ops_lock); - err = mutex_lock_interruptible(&rtc->ops_lock); + return err; +} +EXPORT_SYMBOL_GPL(rtc_read_alarm); + +static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) +{ + struct rtc_time tm; + long now, scheduled; + int err; + + err = rtc_valid_tm(&alarm->time); if (err) return err; + rtc_tm_to_time(&alarm->time, &scheduled); + + /* Make sure we're not setting alarms in the past */ + err = __rtc_read_time(rtc, &tm); + rtc_tm_to_time(&tm, &now); + if (scheduled <= now) + return -ETIME; + /* + * XXX - We just checked to make sure the alarm time is not + * in the past, but there is still a race window where if + * the is alarm set for the next second and the second ticks + * over right here, before we set the alarm. + */ if (!rtc->ops) err = -ENODEV; @@ -308,18 +365,84 @@ int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) else err = rtc->ops->set_alarm(rtc->dev.parent, alarm); + return err; +} + +int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) +{ + int err; + + err = rtc_valid_tm(&alarm->time); + if (err != 0) + return err; + + err = mutex_lock_interruptible(&rtc->ops_lock); + if (err) + return err; + if (rtc->aie_timer.enabled) + rtc_timer_remove(rtc, &rtc->aie_timer); + + rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time); + rtc->aie_timer.period = ktime_set(0, 0); + if (alarm->enabled) + err = rtc_timer_enqueue(rtc, &rtc->aie_timer); + mutex_unlock(&rtc->ops_lock); return err; } EXPORT_SYMBOL_GPL(rtc_set_alarm); +/* Called once per device from rtc_device_register */ +int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) +{ + int err; + struct rtc_time now; + + err = rtc_valid_tm(&alarm->time); + if (err != 0) + return err; + + err = rtc_read_time(rtc, &now); + if (err) + return err; + + err = mutex_lock_interruptible(&rtc->ops_lock); + if (err) + return err; + + rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time); + rtc->aie_timer.period = ktime_set(0, 0); + + /* Alarm has to be enabled & in the futrure for us to enqueue it */ + if (alarm->enabled && (rtc_tm_to_ktime(now).tv64 < + rtc->aie_timer.node.expires.tv64)) { + + rtc->aie_timer.enabled = 1; + timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node); + } + mutex_unlock(&rtc->ops_lock); + return err; +} +EXPORT_SYMBOL_GPL(rtc_initialize_alarm); + + + int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled) { int err = mutex_lock_interruptible(&rtc->ops_lock); if (err) return err; - if (!rtc->ops) + if (rtc->aie_timer.enabled != enabled) { + if (enabled) + err = rtc_timer_enqueue(rtc, &rtc->aie_timer); + else + rtc_timer_remove(rtc, &rtc->aie_timer); + } + + if (err) + /* nothing */; + else if (!rtc->ops) err = -ENODEV; else if (!rtc->ops->alarm_irq_enable) err = -EINVAL; @@ -340,19 +463,33 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled) #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL if (enabled == 0 && rtc->uie_irq_active) { mutex_unlock(&rtc->ops_lock); - return rtc_dev_update_irq_enable_emul(rtc, enabled); + return rtc_dev_update_irq_enable_emul(rtc, 0); } #endif + /* make sure we're changing state */ + if (rtc->uie_rtctimer.enabled == enabled) + goto out; - if (!rtc->ops) - err = -ENODEV; - else if (!rtc->ops->update_irq_enable) + if (rtc->uie_unsupported) { err = -EINVAL; - else - err = rtc->ops->update_irq_enable(rtc->dev.parent, enabled); + goto out; + } - mutex_unlock(&rtc->ops_lock); + if (enabled) { + struct rtc_time tm; + ktime_t now, onesec; + + __rtc_read_time(rtc, &tm); + onesec = ktime_set(1, 0); + now = rtc_tm_to_ktime(tm); + rtc->uie_rtctimer.node.expires = ktime_add(now, onesec); + rtc->uie_rtctimer.period = ktime_set(1, 0); + err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer); + } else + rtc_timer_remove(rtc, &rtc->uie_rtctimer); +out: + mutex_unlock(&rtc->ops_lock); #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL /* * Enable emulation if the driver did not provide @@ -364,25 +501,30 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled) err = rtc_dev_update_irq_enable_emul(rtc, enabled); #endif return err; + } EXPORT_SYMBOL_GPL(rtc_update_irq_enable); + /** - * rtc_update_irq - report RTC periodic, alarm, and/or update irqs - * @rtc: the rtc device - * @num: how many irqs are being reported (usually one) - * @events: mask of RTC_IRQF with one or more of RTC_PF, RTC_AF, RTC_UF - * Context: any + * rtc_handle_legacy_irq - AIE, UIE and PIE event hook + * @rtc: pointer to the rtc device + * + * This function is called when an AIE, UIE or PIE mode interrupt + * has occurred (or been emulated). + * + * Triggers the registered irq_task function callback. */ -void rtc_update_irq(struct rtc_device *rtc, - unsigned long num, unsigned long events) +void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode) { unsigned long flags; + /* mark one irq of the appropriate mode */ spin_lock_irqsave(&rtc->irq_lock, flags); - rtc->irq_data = (rtc->irq_data + (num << 8)) | events; + rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode); spin_unlock_irqrestore(&rtc->irq_lock, flags); + /* call the task func */ spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task) rtc->irq_task->func(rtc->irq_task->private_data); @@ -391,18 +533,85 @@ void rtc_update_irq(struct rtc_device *rtc, wake_up_interruptible(&rtc->irq_queue); kill_fasync(&rtc->async_queue, SIGIO, POLL_IN); } + + +/** + * rtc_aie_update_irq - AIE mode rtctimer hook + * @private: pointer to the rtc_device + * + * This functions is called when the aie_timer expires. + */ +void rtc_aie_update_irq(void *private) +{ + struct rtc_device *rtc = (struct rtc_device *)private; + rtc_handle_legacy_irq(rtc, 1, RTC_AF); +} + + +/** + * rtc_uie_update_irq - UIE mode rtctimer hook + * @private: pointer to the rtc_device + * + * This functions is called when the uie_timer expires. + */ +void rtc_uie_update_irq(void *private) +{ + struct rtc_device *rtc = (struct rtc_device *)private; + rtc_handle_legacy_irq(rtc, 1, RTC_UF); +} + + +/** + * rtc_pie_update_irq - PIE mode hrtimer hook + * @timer: pointer to the pie mode hrtimer + * + * This function is used to emulate PIE mode interrupts + * using an hrtimer. This function is called when the periodic + * hrtimer expires. + */ +enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer) +{ + struct rtc_device *rtc; + ktime_t period; + int count; + rtc = container_of(timer, struct rtc_device, pie_timer); + + period = ktime_set(0, NSEC_PER_SEC/rtc->irq_freq); + count = hrtimer_forward_now(timer, period); + + rtc_handle_legacy_irq(rtc, count, RTC_PF); + + return HRTIMER_RESTART; +} + +/** + * rtc_update_irq - Triggered when a RTC interrupt occurs. + * @rtc: the rtc device + * @num: how many irqs are being reported (usually one) + * @events: mask of RTC_IRQF with one or more of RTC_PF, RTC_AF, RTC_UF + * Context: any + */ +void rtc_update_irq(struct rtc_device *rtc, + unsigned long num, unsigned long events) +{ + if (unlikely(IS_ERR_OR_NULL(rtc))) + return; + + pm_stay_awake(rtc->dev.parent); + schedule_work(&rtc->irqwork); +} EXPORT_SYMBOL_GPL(rtc_update_irq); -static int __rtc_match(struct device *dev, void *data) +static int __rtc_match(struct device *dev, const void *data) { - char *name = (char *)data; + const char *name = data; if (strcmp(dev_name(dev), name) == 0) return 1; return 0; } -struct rtc_device *rtc_class_open(char *name) +struct rtc_device *rtc_class_open(const char *name) { struct device *dev; struct rtc_device *rtc = NULL; @@ -462,6 +671,29 @@ void rtc_irq_unregister(struct rtc_device *rtc, struct rtc_task *task) } EXPORT_SYMBOL_GPL(rtc_irq_unregister); +static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled) +{ + /* + * We always cancel the timer here first, because otherwise + * we could run into BUG_ON(timer->state != HRTIMER_STATE_CALLBACK); + * when we manage to start the timer before the callback + * returns HRTIMER_RESTART. + * + * We cannot use hrtimer_cancel() here as a running callback + * could be blocked on rtc->irq_task_lock and hrtimer_cancel() + * would spin forever. + */ + if (hrtimer_try_to_cancel(&rtc->pie_timer) < 0) + return -1; + + if (enabled) { + ktime_t period = ktime_set(0, NSEC_PER_SEC / rtc->irq_freq); + + hrtimer_start(&rtc->pie_timer, period, HRTIMER_MODE_REL); + } + return 0; +} + /** * rtc_irq_set_state - enable/disable 2^N Hz periodic IRQs * @rtc: the rtc device @@ -477,19 +709,21 @@ int rtc_irq_set_state(struct rtc_device *rtc, struct rtc_task *task, int enabled int err = 0; unsigned long flags; - if (rtc->ops->irq_set_state == NULL) - return -ENXIO; - +retry: spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task != NULL && task == NULL) err = -EBUSY; - if (rtc->irq_task != task) + else if (rtc->irq_task != task) err = -EACCES; + else { + if (rtc_update_hrtimer(rtc, enabled) < 0) { + spin_unlock_irqrestore(&rtc->irq_task_lock, flags); + cpu_relax(); + goto retry; + } + rtc->pie_enabled = enabled; + } spin_unlock_irqrestore(&rtc->irq_task_lock, flags); - - if (err == 0) - err = rtc->ops->irq_set_state(rtc->dev.parent, enabled); - return err; } EXPORT_SYMBOL_GPL(rtc_irq_set_state); @@ -509,21 +743,219 @@ int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq) int err = 0; unsigned long flags; - if (rtc->ops->irq_set_freq == NULL) - return -ENXIO; - + if (freq <= 0 || freq > RTC_MAX_FREQ) + return -EINVAL; +retry: spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task != NULL && task == NULL) err = -EBUSY; - if (rtc->irq_task != task) + else if (rtc->irq_task != task) err = -EACCES; - spin_unlock_irqrestore(&rtc->irq_task_lock, flags); - - if (err == 0) { - err = rtc->ops->irq_set_freq(rtc->dev.parent, freq); - if (err == 0) - rtc->irq_freq = freq; + else { + rtc->irq_freq = freq; + if (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0) { + spin_unlock_irqrestore(&rtc->irq_task_lock, flags); + cpu_relax(); + goto retry; + } } + spin_unlock_irqrestore(&rtc->irq_task_lock, flags); return err; } EXPORT_SYMBOL_GPL(rtc_irq_set_freq); + +/** + * rtc_timer_enqueue - Adds a rtc_timer to the rtc_device timerqueue + * @rtc rtc device + * @timer timer being added. + * + * Enqueues a timer onto the rtc devices timerqueue and sets + * the next alarm event appropriately. + * + * Sets the enabled bit on the added timer. + * + * Must hold ops_lock for proper serialization of timerqueue + */ +static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer) +{ + timer->enabled = 1; + timerqueue_add(&rtc->timerqueue, &timer->node); + if (&timer->node == timerqueue_getnext(&rtc->timerqueue)) { + struct rtc_wkalrm alarm; + int err; + alarm.time = rtc_ktime_to_tm(timer->node.expires); + alarm.enabled = 1; + err = __rtc_set_alarm(rtc, &alarm); + if (err == -ETIME) { + pm_stay_awake(rtc->dev.parent); + schedule_work(&rtc->irqwork); + } else if (err) { + timerqueue_del(&rtc->timerqueue, &timer->node); + timer->enabled = 0; + return err; + } + } + return 0; +} + +static void rtc_alarm_disable(struct rtc_device *rtc) +{ + if (!rtc->ops || !rtc->ops->alarm_irq_enable) + return; + + rtc->ops->alarm_irq_enable(rtc->dev.parent, false); +} + +/** + * rtc_timer_remove - Removes a rtc_timer from the rtc_device timerqueue + * @rtc rtc device + * @timer timer being removed. + * + * Removes a timer onto the rtc devices timerqueue and sets + * the next alarm event appropriately. + * + * Clears the enabled bit on the removed timer. + * + * Must hold ops_lock for proper serialization of timerqueue + */ +static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer) +{ + struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue); + timerqueue_del(&rtc->timerqueue, &timer->node); + timer->enabled = 0; + if (next == &timer->node) { + struct rtc_wkalrm alarm; + int err; + next = timerqueue_getnext(&rtc->timerqueue); + if (!next) { + rtc_alarm_disable(rtc); + return; + } + alarm.time = rtc_ktime_to_tm(next->expires); + alarm.enabled = 1; + err = __rtc_set_alarm(rtc, &alarm); + if (err == -ETIME) { + pm_stay_awake(rtc->dev.parent); + schedule_work(&rtc->irqwork); + } + } +} + +/** + * rtc_timer_do_work - Expires rtc timers + * @rtc rtc device + * @timer timer being removed. + * + * Expires rtc timers. Reprograms next alarm event if needed. + * Called via worktask. + * + * Serializes access to timerqueue via ops_lock mutex + */ +void rtc_timer_do_work(struct work_struct *work) +{ + struct rtc_timer *timer; + struct timerqueue_node *next; + ktime_t now; + struct rtc_time tm; + + struct rtc_device *rtc = + container_of(work, struct rtc_device, irqwork); + + mutex_lock(&rtc->ops_lock); +again: + __rtc_read_time(rtc, &tm); + now = rtc_tm_to_ktime(tm); + while ((next = timerqueue_getnext(&rtc->timerqueue))) { + if (next->expires.tv64 > now.tv64) + break; + + /* expire timer */ + timer = container_of(next, struct rtc_timer, node); + timerqueue_del(&rtc->timerqueue, &timer->node); + timer->enabled = 0; + if (timer->task.func) + timer->task.func(timer->task.private_data); + + /* Re-add/fwd periodic timers */ + if (ktime_to_ns(timer->period)) { + timer->node.expires = ktime_add(timer->node.expires, + timer->period); + timer->enabled = 1; + timerqueue_add(&rtc->timerqueue, &timer->node); + } + } + + /* Set next alarm */ + if (next) { + struct rtc_wkalrm alarm; + int err; + alarm.time = rtc_ktime_to_tm(next->expires); + alarm.enabled = 1; + err = __rtc_set_alarm(rtc, &alarm); + if (err == -ETIME) + goto again; + } else + rtc_alarm_disable(rtc); + + pm_relax(rtc->dev.parent); + mutex_unlock(&rtc->ops_lock); +} + + +/* rtc_timer_init - Initializes an rtc_timer + * @timer: timer to be intiialized + * @f: function pointer to be called when timer fires + * @data: private data passed to function pointer + * + * Kernel interface to initializing an rtc_timer. + */ +void rtc_timer_init(struct rtc_timer *timer, void (*f)(void *p), void *data) +{ + timerqueue_init(&timer->node); + timer->enabled = 0; + timer->task.func = f; + timer->task.private_data = data; +} + +/* rtc_timer_start - Sets an rtc_timer to fire in the future + * @ rtc: rtc device to be used + * @ timer: timer being set + * @ expires: time at which to expire the timer + * @ period: period that the timer will recur + * + * Kernel interface to set an rtc_timer + */ +int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer, + ktime_t expires, ktime_t period) +{ + int ret = 0; + mutex_lock(&rtc->ops_lock); + if (timer->enabled) + rtc_timer_remove(rtc, timer); + + timer->node.expires = expires; + timer->period = period; + + ret = rtc_timer_enqueue(rtc, timer); + + mutex_unlock(&rtc->ops_lock); + return ret; +} + +/* rtc_timer_cancel - Stops an rtc_timer + * @ rtc: rtc device to be used + * @ timer: timer being set + * + * Kernel interface to cancel an rtc_timer + */ +int rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer) +{ + int ret = 0; + mutex_lock(&rtc->ops_lock); + if (timer->enabled) + rtc_timer_remove(rtc, timer); + mutex_unlock(&rtc->ops_lock); + return ret; +} + + diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c new file mode 100644 index 00000000000..0916089c7c3 --- /dev/null +++ b/drivers/rtc/rtc-88pm80x.c @@ -0,0 +1,367 @@ +/* + * Real Time Clock driver for Marvell 88PM80x PMIC + * + * Copyright (c) 2012 Marvell International Ltd. + * Wenzeng Chen<wzch@marvell.com> + * Qiao Zhou <zhouqiao@marvell.com> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/regmap.h> +#include <linux/mfd/core.h> +#include <linux/mfd/88pm80x.h> +#include <linux/rtc.h> + +#define PM800_RTC_COUNTER1 (0xD1) +#define PM800_RTC_COUNTER2 (0xD2) +#define PM800_RTC_COUNTER3 (0xD3) +#define PM800_RTC_COUNTER4 (0xD4) +#define PM800_RTC_EXPIRE1_1 (0xD5) +#define PM800_RTC_EXPIRE1_2 (0xD6) +#define PM800_RTC_EXPIRE1_3 (0xD7) +#define PM800_RTC_EXPIRE1_4 (0xD8) +#define PM800_RTC_TRIM1 (0xD9) +#define PM800_RTC_TRIM2 (0xDA) +#define PM800_RTC_TRIM3 (0xDB) +#define PM800_RTC_TRIM4 (0xDC) +#define PM800_RTC_EXPIRE2_1 (0xDD) +#define PM800_RTC_EXPIRE2_2 (0xDE) +#define PM800_RTC_EXPIRE2_3 (0xDF) +#define PM800_RTC_EXPIRE2_4 (0xE0) + +#define PM800_POWER_DOWN_LOG1 (0xE5) +#define PM800_POWER_DOWN_LOG2 (0xE6) + +struct pm80x_rtc_info { + struct pm80x_chip *chip; + struct regmap *map; + struct rtc_device *rtc_dev; + struct device *dev; + struct delayed_work calib_work; + + int irq; + int vrtc; +}; + +static irqreturn_t rtc_update_handler(int irq, void *data) +{ + struct pm80x_rtc_info *info = (struct pm80x_rtc_info *)data; + int mask; + + mask = PM800_ALARM | PM800_ALARM_WAKEUP; + regmap_update_bits(info->map, PM800_RTC_CONTROL, mask | PM800_ALARM1_EN, + mask); + rtc_update_irq(info->rtc_dev, 1, RTC_AF); + return IRQ_HANDLED; +} + +static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct pm80x_rtc_info *info = dev_get_drvdata(dev); + + if (enabled) + regmap_update_bits(info->map, PM800_RTC_CONTROL, + PM800_ALARM1_EN, PM800_ALARM1_EN); + else + regmap_update_bits(info->map, PM800_RTC_CONTROL, + PM800_ALARM1_EN, 0); + return 0; +} + +/* + * Calculate the next alarm time given the requested alarm time mask + * and the current time. + */ +static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, + struct rtc_time *alrm) +{ + unsigned long next_time; + unsigned long now_time; + + next->tm_year = now->tm_year; + next->tm_mon = now->tm_mon; + next->tm_mday = now->tm_mday; + next->tm_hour = alrm->tm_hour; + next->tm_min = alrm->tm_min; + next->tm_sec = alrm->tm_sec; + + rtc_tm_to_time(now, &now_time); + rtc_tm_to_time(next, &next_time); + + if (next_time < now_time) { + /* Advance one day */ + next_time += 60 * 60 * 24; + rtc_time_to_tm(next_time, next); + } +} + +static int pm80x_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pm80x_rtc_info *info = dev_get_drvdata(dev); + unsigned char buf[4]; + unsigned long ticks, base, data; + regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4); + base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]); + + /* load 32-bit read-only counter */ + regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + ticks = base + data; + dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + rtc_time_to_tm(ticks, tm); + return 0; +} + +static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct pm80x_rtc_info *info = dev_get_drvdata(dev); + unsigned char buf[4]; + unsigned long ticks, base, data; + if ((tm->tm_year < 70) || (tm->tm_year > 138)) { + dev_dbg(info->dev, + "Set time %d out of range. Please set time between 1970 to 2038.\n", + 1900 + tm->tm_year); + return -EINVAL; + } + rtc_tm_to_time(tm, &ticks); + + /* load 32-bit read-only counter */ + regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + base = ticks - data; + dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + buf[0] = base & 0xFF; + buf[1] = (base >> 8) & 0xFF; + buf[2] = (base >> 16) & 0xFF; + buf[3] = (base >> 24) & 0xFF; + regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4); + + return 0; +} + +static int pm80x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pm80x_rtc_info *info = dev_get_drvdata(dev); + unsigned char buf[4]; + unsigned long ticks, base, data; + int ret; + + regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4); + base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]); + + regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + ticks = base + data; + dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + + rtc_time_to_tm(ticks, &alrm->time); + regmap_read(info->map, PM800_RTC_CONTROL, &ret); + alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0; + alrm->pending = (ret & (PM800_ALARM | PM800_ALARM_WAKEUP)) ? 1 : 0; + return 0; +} + +static int pm80x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pm80x_rtc_info *info = dev_get_drvdata(dev); + struct rtc_time now_tm, alarm_tm; + unsigned long ticks, base, data; + unsigned char buf[4]; + int mask; + + regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0); + + regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4); + base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]); + + /* load 32-bit read-only counter */ + regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + ticks = base + data; + dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + + rtc_time_to_tm(ticks, &now_tm); + dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks); + rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time); + /* get new ticks for alarm in 24 hours */ + rtc_tm_to_time(&alarm_tm, &ticks); + dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks); + data = ticks - base; + + buf[0] = data & 0xff; + buf[1] = (data >> 8) & 0xff; + buf[2] = (data >> 16) & 0xff; + buf[3] = (data >> 24) & 0xff; + regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4); + if (alrm->enabled) { + mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN; + regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask); + } else { + mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN; + regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, + PM800_ALARM | PM800_ALARM_WAKEUP); + } + return 0; +} + +static const struct rtc_class_ops pm80x_rtc_ops = { + .read_time = pm80x_rtc_read_time, + .set_time = pm80x_rtc_set_time, + .read_alarm = pm80x_rtc_read_alarm, + .set_alarm = pm80x_rtc_set_alarm, + .alarm_irq_enable = pm80x_rtc_alarm_irq_enable, +}; + +#ifdef CONFIG_PM_SLEEP +static int pm80x_rtc_suspend(struct device *dev) +{ + return pm80x_dev_suspend(dev); +} + +static int pm80x_rtc_resume(struct device *dev) +{ + return pm80x_dev_resume(dev); +} +#endif + +static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume); + +static int pm80x_rtc_probe(struct platform_device *pdev) +{ + struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); + struct pm80x_platform_data *pm80x_pdata = + dev_get_platdata(pdev->dev.parent); + struct pm80x_rtc_pdata *pdata = NULL; + struct pm80x_rtc_info *info; + struct rtc_time tm; + unsigned long ticks = 0; + int ret; + + pdata = dev_get_platdata(&pdev->dev); + if (pdata == NULL) + dev_warn(&pdev->dev, "No platform data!\n"); + + info = + devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + info->irq = platform_get_irq(pdev, 0); + if (info->irq < 0) { + dev_err(&pdev->dev, "No IRQ resource!\n"); + ret = -EINVAL; + goto out; + } + + info->chip = chip; + info->map = chip->regmap; + if (!info->map) { + dev_err(&pdev->dev, "no regmap!\n"); + ret = -EINVAL; + goto out; + } + + info->dev = &pdev->dev; + dev_set_drvdata(&pdev->dev, info); + + ret = pm80x_request_irq(chip, info->irq, rtc_update_handler, + IRQF_ONESHOT, "rtc", info); + if (ret < 0) { + dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", + info->irq, ret); + goto out; + } + + ret = pm80x_rtc_read_time(&pdev->dev, &tm); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to read initial time.\n"); + goto out_rtc; + } + if ((tm.tm_year < 70) || (tm.tm_year > 138)) { + tm.tm_year = 70; + tm.tm_mon = 0; + tm.tm_mday = 1; + tm.tm_hour = 0; + tm.tm_min = 0; + tm.tm_sec = 0; + ret = pm80x_rtc_set_time(&pdev->dev, &tm); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to set initial time.\n"); + goto out_rtc; + } + } + rtc_tm_to_time(&tm, &ticks); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm80x-rtc", + &pm80x_rtc_ops, THIS_MODULE); + if (IS_ERR(info->rtc_dev)) { + ret = PTR_ERR(info->rtc_dev); + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); + goto out_rtc; + } + /* + * enable internal XO instead of internal 3.25MHz clock since it can + * free running in PMIC power-down state. + */ + regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO, + PM800_RTC1_USE_XO); + + if (pm80x_pdata) { + pdata = pm80x_pdata->rtc; + if (pdata) + info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup; + } + + device_init_wakeup(&pdev->dev, 1); + + return 0; +out_rtc: + pm80x_free_irq(chip, info->irq, info); +out: + return ret; +} + +static int pm80x_rtc_remove(struct platform_device *pdev) +{ + struct pm80x_rtc_info *info = platform_get_drvdata(pdev); + pm80x_free_irq(info->chip, info->irq, info); + return 0; +} + +static struct platform_driver pm80x_rtc_driver = { + .driver = { + .name = "88pm80x-rtc", + .owner = THIS_MODULE, + .pm = &pm80x_rtc_pm_ops, + }, + .probe = pm80x_rtc_probe, + .remove = pm80x_rtc_remove, +}; + +module_platform_driver(pm80x_rtc_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Marvell 88PM80x RTC driver"); +MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>"); +MODULE_ALIAS("platform:88pm80x-rtc"); diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c new file mode 100644 index 00000000000..0c6add1a38d --- /dev/null +++ b/drivers/rtc/rtc-88pm860x.c @@ -0,0 +1,462 @@ +/* + * Real Time Clock driver for Marvell 88PM860x PMIC + * + * Copyright (c) 2010 Marvell International Ltd. + * Author: Haojian Zhuang <haojian.zhuang@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/mutex.h> +#include <linux/rtc.h> +#include <linux/delay.h> +#include <linux/mfd/core.h> +#include <linux/mfd/88pm860x.h> + +#define VRTC_CALIBRATION + +struct pm860x_rtc_info { + struct pm860x_chip *chip; + struct i2c_client *i2c; + struct rtc_device *rtc_dev; + struct device *dev; + struct delayed_work calib_work; + + int irq; + int vrtc; + int (*sync)(unsigned int ticks); +}; + +#define REG_VRTC_MEAS1 0x7D + +#define REG0_ADDR 0xB0 +#define REG1_ADDR 0xB2 +#define REG2_ADDR 0xB4 +#define REG3_ADDR 0xB6 + +#define REG0_DATA 0xB1 +#define REG1_DATA 0xB3 +#define REG2_DATA 0xB5 +#define REG3_DATA 0xB7 + +/* bit definitions of Measurement Enable Register 2 (0x51) */ +#define MEAS2_VRTC (1 << 0) + +/* bit definitions of RTC Register 1 (0xA0) */ +#define ALARM_EN (1 << 3) +#define ALARM_WAKEUP (1 << 4) +#define ALARM (1 << 5) +#define RTC1_USE_XO (1 << 7) + +#define VRTC_CALIB_INTERVAL (HZ * 60 * 10) /* 10 minutes */ + +static irqreturn_t rtc_update_handler(int irq, void *data) +{ + struct pm860x_rtc_info *info = (struct pm860x_rtc_info *)data; + int mask; + + mask = ALARM | ALARM_WAKEUP; + pm860x_set_bits(info->i2c, PM8607_RTC1, mask | ALARM_EN, mask); + rtc_update_irq(info->rtc_dev, 1, RTC_AF); + return IRQ_HANDLED; +} + +static int pm860x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct pm860x_rtc_info *info = dev_get_drvdata(dev); + + if (enabled) + pm860x_set_bits(info->i2c, PM8607_RTC1, ALARM_EN, ALARM_EN); + else + pm860x_set_bits(info->i2c, PM8607_RTC1, ALARM_EN, 0); + return 0; +} + +/* + * Calculate the next alarm time given the requested alarm time mask + * and the current time. + */ +static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, + struct rtc_time *alrm) +{ + unsigned long next_time; + unsigned long now_time; + + next->tm_year = now->tm_year; + next->tm_mon = now->tm_mon; + next->tm_mday = now->tm_mday; + next->tm_hour = alrm->tm_hour; + next->tm_min = alrm->tm_min; + next->tm_sec = alrm->tm_sec; + + rtc_tm_to_time(now, &now_time); + rtc_tm_to_time(next, &next_time); + + if (next_time < now_time) { + /* Advance one day */ + next_time += 60 * 60 * 24; + rtc_time_to_tm(next_time, next); + } +} + +static int pm860x_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pm860x_rtc_info *info = dev_get_drvdata(dev); + unsigned char buf[8]; + unsigned long ticks, base, data; + + pm860x_page_bulk_read(info->i2c, REG0_ADDR, 8, buf); + dev_dbg(info->dev, "%x-%x-%x-%x-%x-%x-%x-%x\n", buf[0], buf[1], + buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]); + base = (buf[1] << 24) | (buf[3] << 16) | (buf[5] << 8) | buf[7]; + + /* load 32-bit read-only counter */ + pm860x_bulk_read(info->i2c, PM8607_RTC_COUNTER1, 4, buf); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + ticks = base + data; + dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + + rtc_time_to_tm(ticks, tm); + + return 0; +} + +static int pm860x_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct pm860x_rtc_info *info = dev_get_drvdata(dev); + unsigned char buf[4]; + unsigned long ticks, base, data; + + if ((tm->tm_year < 70) || (tm->tm_year > 138)) { + dev_dbg(info->dev, "Set time %d out of range. " + "Please set time between 1970 to 2038.\n", + 1900 + tm->tm_year); + return -EINVAL; + } + rtc_tm_to_time(tm, &ticks); + + /* load 32-bit read-only counter */ + pm860x_bulk_read(info->i2c, PM8607_RTC_COUNTER1, 4, buf); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + base = ticks - data; + dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + + pm860x_page_reg_write(info->i2c, REG0_DATA, (base >> 24) & 0xFF); + pm860x_page_reg_write(info->i2c, REG1_DATA, (base >> 16) & 0xFF); + pm860x_page_reg_write(info->i2c, REG2_DATA, (base >> 8) & 0xFF); + pm860x_page_reg_write(info->i2c, REG3_DATA, base & 0xFF); + + if (info->sync) + info->sync(ticks); + return 0; +} + +static int pm860x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pm860x_rtc_info *info = dev_get_drvdata(dev); + unsigned char buf[8]; + unsigned long ticks, base, data; + int ret; + + pm860x_page_bulk_read(info->i2c, REG0_ADDR, 8, buf); + dev_dbg(info->dev, "%x-%x-%x-%x-%x-%x-%x-%x\n", buf[0], buf[1], + buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]); + base = (buf[1] << 24) | (buf[3] << 16) | (buf[5] << 8) | buf[7]; + + pm860x_bulk_read(info->i2c, PM8607_RTC_EXPIRE1, 4, buf); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + ticks = base + data; + dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + + rtc_time_to_tm(ticks, &alrm->time); + ret = pm860x_reg_read(info->i2c, PM8607_RTC1); + alrm->enabled = (ret & ALARM_EN) ? 1 : 0; + alrm->pending = (ret & (ALARM | ALARM_WAKEUP)) ? 1 : 0; + return 0; +} + +static int pm860x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pm860x_rtc_info *info = dev_get_drvdata(dev); + struct rtc_time now_tm, alarm_tm; + unsigned long ticks, base, data; + unsigned char buf[8]; + int mask; + + pm860x_set_bits(info->i2c, PM8607_RTC1, ALARM_EN, 0); + + pm860x_page_bulk_read(info->i2c, REG0_ADDR, 8, buf); + dev_dbg(info->dev, "%x-%x-%x-%x-%x-%x-%x-%x\n", buf[0], buf[1], + buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]); + base = (buf[1] << 24) | (buf[3] << 16) | (buf[5] << 8) | buf[7]; + + /* load 32-bit read-only counter */ + pm860x_bulk_read(info->i2c, PM8607_RTC_COUNTER1, 4, buf); + data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; + ticks = base + data; + dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", + base, data, ticks); + + rtc_time_to_tm(ticks, &now_tm); + rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time); + /* get new ticks for alarm in 24 hours */ + rtc_tm_to_time(&alarm_tm, &ticks); + data = ticks - base; + + buf[0] = data & 0xff; + buf[1] = (data >> 8) & 0xff; + buf[2] = (data >> 16) & 0xff; + buf[3] = (data >> 24) & 0xff; + pm860x_bulk_write(info->i2c, PM8607_RTC_EXPIRE1, 4, buf); + if (alrm->enabled) { + mask = ALARM | ALARM_WAKEUP | ALARM_EN; + pm860x_set_bits(info->i2c, PM8607_RTC1, mask, mask); + } else { + mask = ALARM | ALARM_WAKEUP | ALARM_EN; + pm860x_set_bits(info->i2c, PM8607_RTC1, mask, + ALARM | ALARM_WAKEUP); + } + return 0; +} + +static const struct rtc_class_ops pm860x_rtc_ops = { + .read_time = pm860x_rtc_read_time, + .set_time = pm860x_rtc_set_time, + .read_alarm = pm860x_rtc_read_alarm, + .set_alarm = pm860x_rtc_set_alarm, + .alarm_irq_enable = pm860x_rtc_alarm_irq_enable, +}; + +#ifdef VRTC_CALIBRATION +static void calibrate_vrtc_work(struct work_struct *work) +{ + struct pm860x_rtc_info *info = container_of(work, + struct pm860x_rtc_info, calib_work.work); + unsigned char buf[2]; + unsigned int sum, data, mean, vrtc_set; + int i; + + for (i = 0, sum = 0; i < 16; i++) { + msleep(100); + pm860x_bulk_read(info->i2c, REG_VRTC_MEAS1, 2, buf); + data = (buf[0] << 4) | buf[1]; + data = (data * 5400) >> 12; /* convert to mv */ + sum += data; + } + mean = sum >> 4; + vrtc_set = 2700 + (info->vrtc & 0x3) * 200; + dev_dbg(info->dev, "mean:%d, vrtc_set:%d\n", mean, vrtc_set); + + sum = pm860x_reg_read(info->i2c, PM8607_RTC_MISC1); + data = sum & 0x3; + if ((mean + 200) < vrtc_set) { + /* try higher voltage */ + if (++data == 4) + goto out; + data = (sum & 0xf8) | (data & 0x3); + pm860x_reg_write(info->i2c, PM8607_RTC_MISC1, data); + } else if ((mean - 200) > vrtc_set) { + /* try lower voltage */ + if (data-- == 0) + goto out; + data = (sum & 0xf8) | (data & 0x3); + pm860x_reg_write(info->i2c, PM8607_RTC_MISC1, data); + } else + goto out; + dev_dbg(info->dev, "set 0x%x to RTC_MISC1\n", data); + /* trigger next calibration since VRTC is updated */ + schedule_delayed_work(&info->calib_work, VRTC_CALIB_INTERVAL); + return; +out: + /* disable measurement */ + pm860x_set_bits(info->i2c, PM8607_MEAS_EN2, MEAS2_VRTC, 0); + dev_dbg(info->dev, "finish VRTC calibration\n"); + return; +} +#endif + +#ifdef CONFIG_OF +static int pm860x_rtc_dt_init(struct platform_device *pdev, + struct pm860x_rtc_info *info) +{ + struct device_node *np = pdev->dev.parent->of_node; + int ret; + if (!np) + return -ENODEV; + np = of_get_child_by_name(np, "rtc"); + if (!np) { + dev_err(&pdev->dev, "failed to find rtc node\n"); + return -ENODEV; + } + ret = of_property_read_u32(np, "marvell,88pm860x-vrtc", &info->vrtc); + if (ret) + info->vrtc = 0; + of_node_put(np); + return 0; +} +#else +#define pm860x_rtc_dt_init(x, y) (-1) +#endif + +static int pm860x_rtc_probe(struct platform_device *pdev) +{ + struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); + struct pm860x_rtc_pdata *pdata = NULL; + struct pm860x_rtc_info *info; + struct rtc_time tm; + unsigned long ticks = 0; + int ret; + + pdata = dev_get_platdata(&pdev->dev); + + info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_rtc_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + info->irq = platform_get_irq(pdev, 0); + if (info->irq < 0) { + dev_err(&pdev->dev, "No IRQ resource!\n"); + return info->irq; + } + + info->chip = chip; + info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; + info->dev = &pdev->dev; + dev_set_drvdata(&pdev->dev, info); + + ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, + rtc_update_handler, IRQF_ONESHOT, "rtc", + info); + if (ret < 0) { + dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", + info->irq, ret); + return ret; + } + + /* set addresses of 32-bit base value for RTC time */ + pm860x_page_reg_write(info->i2c, REG0_ADDR, REG0_DATA); + pm860x_page_reg_write(info->i2c, REG1_ADDR, REG1_DATA); + pm860x_page_reg_write(info->i2c, REG2_ADDR, REG2_DATA); + pm860x_page_reg_write(info->i2c, REG3_ADDR, REG3_DATA); + + ret = pm860x_rtc_read_time(&pdev->dev, &tm); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to read initial time.\n"); + return ret; + } + if ((tm.tm_year < 70) || (tm.tm_year > 138)) { + tm.tm_year = 70; + tm.tm_mon = 0; + tm.tm_mday = 1; + tm.tm_hour = 0; + tm.tm_min = 0; + tm.tm_sec = 0; + ret = pm860x_rtc_set_time(&pdev->dev, &tm); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to set initial time.\n"); + return ret; + } + } + rtc_tm_to_time(&tm, &ticks); + if (pm860x_rtc_dt_init(pdev, info)) { + if (pdata && pdata->sync) { + pdata->sync(ticks); + info->sync = pdata->sync; + } + } + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm860x-rtc", + &pm860x_rtc_ops, THIS_MODULE); + ret = PTR_ERR(info->rtc_dev); + if (IS_ERR(info->rtc_dev)) { + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); + return ret; + } + + /* + * enable internal XO instead of internal 3.25MHz clock since it can + * free running in PMIC power-down state. + */ + pm860x_set_bits(info->i2c, PM8607_RTC1, RTC1_USE_XO, RTC1_USE_XO); + +#ifdef VRTC_CALIBRATION + /* <00> -- 2.7V, <01> -- 2.9V, <10> -- 3.1V, <11> -- 3.3V */ + if (pm860x_rtc_dt_init(pdev, info)) { + if (pdata && pdata->vrtc) + info->vrtc = pdata->vrtc & 0x3; + else + info->vrtc = 1; + } + pm860x_set_bits(info->i2c, PM8607_MEAS_EN2, MEAS2_VRTC, MEAS2_VRTC); + + /* calibrate VRTC */ + INIT_DELAYED_WORK(&info->calib_work, calibrate_vrtc_work); + schedule_delayed_work(&info->calib_work, VRTC_CALIB_INTERVAL); +#endif /* VRTC_CALIBRATION */ + + device_init_wakeup(&pdev->dev, 1); + + return 0; +} + +static int pm860x_rtc_remove(struct platform_device *pdev) +{ + struct pm860x_rtc_info *info = platform_get_drvdata(pdev); + +#ifdef VRTC_CALIBRATION + flush_scheduled_work(); + /* disable measurement */ + pm860x_set_bits(info->i2c, PM8607_MEAS_EN2, MEAS2_VRTC, 0); +#endif /* VRTC_CALIBRATION */ + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int pm860x_rtc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); + + if (device_may_wakeup(dev)) + chip->wakeup_flag |= 1 << PM8607_IRQ_RTC; + return 0; +} +static int pm860x_rtc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); + + if (device_may_wakeup(dev)) + chip->wakeup_flag &= ~(1 << PM8607_IRQ_RTC); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(pm860x_rtc_pm_ops, pm860x_rtc_suspend, pm860x_rtc_resume); + +static struct platform_driver pm860x_rtc_driver = { + .driver = { + .name = "88pm860x-rtc", + .owner = THIS_MODULE, + .pm = &pm860x_rtc_pm_ops, + }, + .probe = pm860x_rtc_probe, + .remove = pm860x_rtc_remove, +}; + +module_platform_driver(pm860x_rtc_driver); + +MODULE_DESCRIPTION("Marvell 88PM860x RTC driver"); +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ab3100.c b/drivers/rtc/rtc-ab3100.c index 261a07e0fb2..ff435343ba9 100644 --- a/drivers/rtc/rtc-ab3100.c +++ b/drivers/rtc/rtc-ab3100.c @@ -229,8 +229,8 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev) /* Ignore any error on this write */ } - rtc = rtc_device_register("ab3100-rtc", &pdev->dev, &ab3100_rtc_ops, - THIS_MODULE); + rtc = devm_rtc_device_register(&pdev->dev, "ab3100-rtc", + &ab3100_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { err = PTR_ERR(rtc); return err; @@ -240,36 +240,14 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev) return 0; } -static int __exit ab3100_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc = platform_get_drvdata(pdev); - - rtc_device_unregister(rtc); - platform_set_drvdata(pdev, NULL); - return 0; -} - static struct platform_driver ab3100_rtc_driver = { .driver = { .name = "ab3100-rtc", .owner = THIS_MODULE, }, - .remove = __exit_p(ab3100_rtc_remove), }; -static int __init ab3100_rtc_init(void) -{ - return platform_driver_probe(&ab3100_rtc_driver, - ab3100_rtc_probe); -} - -static void __exit ab3100_rtc_exit(void) -{ - platform_driver_unregister(&ab3100_rtc_driver); -} - -module_init(ab3100_rtc_init); -module_exit(ab3100_rtc_exit); +module_platform_driver_probe(ab3100_rtc_driver, ab3100_rtc_probe); MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); MODULE_DESCRIPTION("AB3100 RTC Driver"); diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c index e346705aae9..727e2f5d14d 100644 --- a/drivers/rtc/rtc-ab8500.c +++ b/drivers/rtc/rtc-ab8500.c @@ -15,8 +15,9 @@ #include <linux/platform_device.h> #include <linux/rtc.h> #include <linux/mfd/abx500.h> -#include <linux/mfd/ab8500.h> +#include <linux/mfd/abx500/ab8500.h> #include <linux/delay.h> +#include <linux/of.h> #define AB8500_RTC_SOFF_STAT_REG 0x00 #define AB8500_RTC_CC_CONF_REG 0x01 @@ -34,6 +35,10 @@ #define AB8500_RTC_FORCE_BKUP_REG 0x0D #define AB8500_RTC_CALIB_REG 0x0E #define AB8500_RTC_SWITCH_STAT_REG 0x0F +#define AB8540_RTC_ALRM_SEC 0x22 +#define AB8540_RTC_ALRM_MIN_LOW_REG 0x23 +#define AB8540_RTC_ALRM_MIN_MID_REG 0x24 +#define AB8540_RTC_ALRM_MIN_HI_REG 0x25 /* RtcReadRequest bits */ #define RTC_READ_REQUEST 0x01 @@ -57,6 +62,11 @@ static const u8 ab8500_rtc_alarm_regs[] = { AB8500_RTC_ALRM_MIN_LOW_REG }; +static const u8 ab8540_rtc_alarm_regs[] = { + AB8540_RTC_ALRM_MIN_HI_REG, AB8540_RTC_ALRM_MIN_MID_REG, + AB8540_RTC_ALRM_MIN_LOW_REG, AB8540_RTC_ALRM_SEC +}; + /* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */ static unsigned long get_elapsed_seconds(int year) { @@ -88,22 +98,17 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) if (retval < 0) return retval; - /* Early AB8500 chips will not clear the rtc read request bit */ - if (abx500_get_chip_id(dev) == 0) { - msleep(1); - } else { - /* Wait for some cycles after enabling the rtc read in ab8500 */ - while (time_before(jiffies, timeout)) { - retval = abx500_get_register_interruptible(dev, - AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value); - if (retval < 0) - return retval; - - if (!(value & RTC_READ_REQUEST)) - break; - - msleep(1); - } + /* Wait for some cycles after enabling the rtc read in ab8500 */ + while (time_before(jiffies, timeout)) { + retval = abx500_get_register_interruptible(dev, + AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value); + if (retval < 0) + return retval; + + if (!(value & RTC_READ_REQUEST)) + break; + + usleep_range(1000, 5000); } /* Read the Watchtime registers */ @@ -224,7 +229,8 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) { int retval, i; unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; - unsigned long mins, secs = 0; + unsigned long mins, secs = 0, cursec = 0; + struct rtc_time curtm; if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) { dev_dbg(dev, "year should be equal to or greater than %d\n", @@ -236,6 +242,18 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) rtc_tm_to_time(&alarm->time, &secs); /* + * Check whether alarm is set less than 1min. + * Since our RTC doesn't support alarm resolution less than 1min, + * return -EINVAL, so UIE EMUL can take it up, incase of UIE_ON + */ + ab8500_rtc_read_time(dev, &curtm); /* Read current time */ + rtc_tm_to_time(&curtm, &cursec); + if ((secs - cursec) < 59) { + dev_dbg(dev, "Alarm less than 1 minute not supported\r\n"); + return -EINVAL; + } + + /* * Convert it to the number of seconds since 01-01-2000 00:00:00, since * we only have a small counter in the RTC. */ @@ -258,6 +276,145 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) return ab8500_rtc_irq_enable(dev, alarm->enabled); } +static int ab8540_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int retval, i; + unsigned char buf[ARRAY_SIZE(ab8540_rtc_alarm_regs)]; + unsigned long mins, secs = 0; + + if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) { + dev_dbg(dev, "year should be equal to or greater than %d\n", + AB8500_RTC_EPOCH); + return -EINVAL; + } + + /* Get the number of seconds since 1970 */ + rtc_tm_to_time(&alarm->time, &secs); + + /* + * Convert it to the number of seconds since 01-01-2000 00:00:00 + */ + secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); + mins = secs / 60; + + buf[3] = secs % 60; + buf[2] = mins & 0xFF; + buf[1] = (mins >> 8) & 0xFF; + buf[0] = (mins >> 16) & 0xFF; + + /* Set the alarm time */ + for (i = 0; i < ARRAY_SIZE(ab8540_rtc_alarm_regs); i++) { + retval = abx500_set_register_interruptible(dev, AB8500_RTC, + ab8540_rtc_alarm_regs[i], buf[i]); + if (retval < 0) + return retval; + } + + return ab8500_rtc_irq_enable(dev, alarm->enabled); +} + +static int ab8500_rtc_set_calibration(struct device *dev, int calibration) +{ + int retval; + u8 rtccal = 0; + + /* + * Check that the calibration value (which is in units of 0.5 + * parts-per-million) is in the AB8500's range for RtcCalibration + * register. -128 (0x80) is not permitted because the AB8500 uses + * a sign-bit rather than two's complement, so 0x80 is just another + * representation of zero. + */ + if ((calibration < -127) || (calibration > 127)) { + dev_err(dev, "RtcCalibration value outside permitted range\n"); + return -EINVAL; + } + + /* + * The AB8500 uses sign (in bit7) and magnitude (in bits0-7) + * so need to convert to this sort of representation before writing + * into RtcCalibration register... + */ + if (calibration >= 0) + rtccal = 0x7F & calibration; + else + rtccal = ~(calibration - 1) | 0x80; + + retval = abx500_set_register_interruptible(dev, AB8500_RTC, + AB8500_RTC_CALIB_REG, rtccal); + + return retval; +} + +static int ab8500_rtc_get_calibration(struct device *dev, int *calibration) +{ + int retval; + u8 rtccal = 0; + + retval = abx500_get_register_interruptible(dev, AB8500_RTC, + AB8500_RTC_CALIB_REG, &rtccal); + if (retval >= 0) { + /* + * The AB8500 uses sign (in bit7) and magnitude (in bits0-7) + * so need to convert value from RtcCalibration register into + * a two's complement signed value... + */ + if (rtccal & 0x80) + *calibration = 0 - (rtccal & 0x7F); + else + *calibration = 0x7F & rtccal; + } + + return retval; +} + +static ssize_t ab8500_sysfs_store_rtc_calibration(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int retval; + int calibration = 0; + + if (sscanf(buf, " %i ", &calibration) != 1) { + dev_err(dev, "Failed to store RTC calibration attribute\n"); + return -EINVAL; + } + + retval = ab8500_rtc_set_calibration(dev, calibration); + + return retval ? retval : count; +} + +static ssize_t ab8500_sysfs_show_rtc_calibration(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int retval = 0; + int calibration = 0; + + retval = ab8500_rtc_get_calibration(dev, &calibration); + if (retval < 0) { + dev_err(dev, "Failed to read RTC calibration attribute\n"); + sprintf(buf, "0\n"); + return retval; + } + + return sprintf(buf, "%d\n", calibration); +} + +static DEVICE_ATTR(rtc_calibration, S_IRUGO | S_IWUSR, + ab8500_sysfs_show_rtc_calibration, + ab8500_sysfs_store_rtc_calibration); + +static int ab8500_sysfs_rtc_register(struct device *dev) +{ + return device_create_file(dev, &dev_attr_rtc_calibration); +} + +static void ab8500_sysfs_rtc_unregister(struct device *dev) +{ + device_remove_file(dev, &dev_attr_rtc_calibration); +} + static irqreturn_t rtc_alarm_handler(int irq, void *data) { struct rtc_device *rtc = data; @@ -277,8 +434,22 @@ static const struct rtc_class_ops ab8500_rtc_ops = { .alarm_irq_enable = ab8500_rtc_irq_enable, }; -static int __devinit ab8500_rtc_probe(struct platform_device *pdev) +static const struct rtc_class_ops ab8540_rtc_ops = { + .read_time = ab8500_rtc_read_time, + .set_time = ab8500_rtc_set_time, + .read_alarm = ab8500_rtc_read_alarm, + .set_alarm = ab8540_rtc_set_alarm, + .alarm_irq_enable = ab8500_rtc_irq_enable, +}; + +static struct platform_device_id ab85xx_rtc_ids[] = { + { "ab8500-rtc", (kernel_ulong_t)&ab8500_rtc_ops, }, + { "ab8540-rtc", (kernel_ulong_t)&ab8540_rtc_ops, }, +}; + +static int ab8500_rtc_probe(struct platform_device *pdev) { + const struct platform_device_id *platid = platform_get_device_id(pdev); int err; struct rtc_device *rtc; u8 rtc_ctrl; @@ -295,7 +466,7 @@ static int __devinit ab8500_rtc_probe(struct platform_device *pdev) return err; /* Wait for reset by the PorRtc */ - msleep(1); + usleep_range(1000, 5000); err = abx500_get_register_interruptible(&pdev->dev, AB8500_RTC, AB8500_RTC_STAT_REG, &rtc_ctrl); @@ -308,34 +479,37 @@ static int __devinit ab8500_rtc_probe(struct platform_device *pdev) return -ENODEV; } - rtc = rtc_device_register("ab8500-rtc", &pdev->dev, &ab8500_rtc_ops, - THIS_MODULE); + device_init_wakeup(&pdev->dev, true); + + rtc = devm_rtc_device_register(&pdev->dev, "ab8500-rtc", + (struct rtc_class_ops *)platid->driver_data, + THIS_MODULE); if (IS_ERR(rtc)) { dev_err(&pdev->dev, "Registration failed\n"); err = PTR_ERR(rtc); return err; } - err = request_threaded_irq(irq, NULL, rtc_alarm_handler, 0, - "ab8500-rtc", rtc); - if (err < 0) { - rtc_device_unregister(rtc); + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, + rtc_alarm_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT, + "ab8500-rtc", rtc); + if (err < 0) return err; - } platform_set_drvdata(pdev, rtc); + err = ab8500_sysfs_rtc_register(&pdev->dev); + if (err) { + dev_err(&pdev->dev, "sysfs RTC failed to register\n"); + return err; + } + return 0; } -static int __devexit ab8500_rtc_remove(struct platform_device *pdev) +static int ab8500_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - int irq = platform_get_irq_byname(pdev, "ALARM"); - - free_irq(irq, rtc); - rtc_device_unregister(rtc); - platform_set_drvdata(pdev, NULL); + ab8500_sysfs_rtc_unregister(&pdev->dev); return 0; } @@ -346,21 +520,12 @@ static struct platform_driver ab8500_rtc_driver = { .owner = THIS_MODULE, }, .probe = ab8500_rtc_probe, - .remove = __devexit_p(ab8500_rtc_remove), + .remove = ab8500_rtc_remove, + .id_table = ab85xx_rtc_ids, }; -static int __init ab8500_rtc_init(void) -{ - return platform_driver_register(&ab8500_rtc_driver); -} - -static void __exit ab8500_rtc_exit(void) -{ - platform_driver_unregister(&ab8500_rtc_driver); -} +module_platform_driver(ab8500_rtc_driver); -module_init(ab8500_rtc_init); -module_exit(ab8500_rtc_exit); MODULE_AUTHOR("Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>"); MODULE_DESCRIPTION("AB8500 RTC Driver"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-as3722.c b/drivers/rtc/rtc-as3722.c new file mode 100644 index 00000000000..9f38eda6915 --- /dev/null +++ b/drivers/rtc/rtc-as3722.c @@ -0,0 +1,261 @@ +/* + * rtc-as3722.c - Real Time Clock driver for ams AS3722 PMICs + * + * Copyright (C) 2013 ams AG + * Copyright (c) 2013, NVIDIA Corporation. All rights reserved. + * + * Author: Florian Lobmaier <florian.lobmaier@ams.com> + * Author: Laxman Dewangan <ldewangan@nvidia.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/bcd.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/ioctl.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mfd/as3722.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/time.h> + +#define AS3722_RTC_START_YEAR 2000 +struct as3722_rtc { + struct rtc_device *rtc; + struct device *dev; + struct as3722 *as3722; + int alarm_irq; + bool irq_enable; +}; + +static void as3722_time_to_reg(u8 *rbuff, struct rtc_time *tm) +{ + rbuff[0] = bin2bcd(tm->tm_sec); + rbuff[1] = bin2bcd(tm->tm_min); + rbuff[2] = bin2bcd(tm->tm_hour); + rbuff[3] = bin2bcd(tm->tm_mday); + rbuff[4] = bin2bcd(tm->tm_mon); + rbuff[5] = bin2bcd(tm->tm_year - (AS3722_RTC_START_YEAR - 1900)); +} + +static void as3722_reg_to_time(u8 *rbuff, struct rtc_time *tm) +{ + tm->tm_sec = bcd2bin(rbuff[0] & 0x7F); + tm->tm_min = bcd2bin(rbuff[1] & 0x7F); + tm->tm_hour = bcd2bin(rbuff[2] & 0x3F); + tm->tm_mday = bcd2bin(rbuff[3] & 0x3F); + tm->tm_mon = bcd2bin(rbuff[4] & 0x1F); + tm->tm_year = (AS3722_RTC_START_YEAR - 1900) + bcd2bin(rbuff[5] & 0x7F); + return; +} + +static int as3722_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + struct as3722 *as3722 = as3722_rtc->as3722; + u8 as_time_array[6]; + int ret; + + ret = as3722_block_read(as3722, AS3722_RTC_SECOND_REG, + 6, as_time_array); + if (ret < 0) { + dev_err(dev, "RTC_SECOND reg block read failed %d\n", ret); + return ret; + } + as3722_reg_to_time(as_time_array, tm); + return 0; +} + +static int as3722_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + struct as3722 *as3722 = as3722_rtc->as3722; + u8 as_time_array[6]; + int ret; + + if (tm->tm_year < (AS3722_RTC_START_YEAR - 1900)) + return -EINVAL; + + as3722_time_to_reg(as_time_array, tm); + ret = as3722_block_write(as3722, AS3722_RTC_SECOND_REG, 6, + as_time_array); + if (ret < 0) + dev_err(dev, "RTC_SECOND reg block write failed %d\n", ret); + return ret; +} + +static int as3722_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + + if (enabled && !as3722_rtc->irq_enable) { + enable_irq(as3722_rtc->alarm_irq); + as3722_rtc->irq_enable = true; + } else if (!enabled && as3722_rtc->irq_enable) { + disable_irq(as3722_rtc->alarm_irq); + as3722_rtc->irq_enable = false; + } + return 0; +} + +static int as3722_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + struct as3722 *as3722 = as3722_rtc->as3722; + u8 as_time_array[6]; + int ret; + + ret = as3722_block_read(as3722, AS3722_RTC_ALARM_SECOND_REG, 6, + as_time_array); + if (ret < 0) { + dev_err(dev, "RTC_ALARM_SECOND block read failed %d\n", ret); + return ret; + } + + as3722_reg_to_time(as_time_array, &alrm->time); + return 0; +} + +static int as3722_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + struct as3722 *as3722 = as3722_rtc->as3722; + u8 as_time_array[6]; + int ret; + + if (alrm->time.tm_year < (AS3722_RTC_START_YEAR - 1900)) + return -EINVAL; + + ret = as3722_rtc_alarm_irq_enable(dev, 0); + if (ret < 0) { + dev_err(dev, "Disable RTC alarm failed\n"); + return ret; + } + + as3722_time_to_reg(as_time_array, &alrm->time); + ret = as3722_block_write(as3722, AS3722_RTC_ALARM_SECOND_REG, 6, + as_time_array); + if (ret < 0) { + dev_err(dev, "RTC_ALARM_SECOND block write failed %d\n", ret); + return ret; + } + + if (alrm->enabled) + ret = as3722_rtc_alarm_irq_enable(dev, alrm->enabled); + return ret; +} + +static irqreturn_t as3722_alarm_irq(int irq, void *data) +{ + struct as3722_rtc *as3722_rtc = data; + + rtc_update_irq(as3722_rtc->rtc, 1, RTC_IRQF | RTC_AF); + return IRQ_HANDLED; +} + +static const struct rtc_class_ops as3722_rtc_ops = { + .read_time = as3722_rtc_read_time, + .set_time = as3722_rtc_set_time, + .read_alarm = as3722_rtc_read_alarm, + .set_alarm = as3722_rtc_set_alarm, + .alarm_irq_enable = as3722_rtc_alarm_irq_enable, +}; + +static int as3722_rtc_probe(struct platform_device *pdev) +{ + struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent); + struct as3722_rtc *as3722_rtc; + int ret; + + as3722_rtc = devm_kzalloc(&pdev->dev, sizeof(*as3722_rtc), GFP_KERNEL); + if (!as3722_rtc) + return -ENOMEM; + + as3722_rtc->as3722 = as3722; + as3722_rtc->dev = &pdev->dev; + platform_set_drvdata(pdev, as3722_rtc); + + /* Enable the RTC to make sure it is running. */ + ret = as3722_update_bits(as3722, AS3722_RTC_CONTROL_REG, + AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN, + AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN); + if (ret < 0) { + dev_err(&pdev->dev, "RTC_CONTROL reg write failed: %d\n", ret); + return ret; + } + + device_init_wakeup(&pdev->dev, 1); + + as3722_rtc->rtc = devm_rtc_device_register(&pdev->dev, "as3722-rtc", + &as3722_rtc_ops, THIS_MODULE); + if (IS_ERR(as3722_rtc->rtc)) { + ret = PTR_ERR(as3722_rtc->rtc); + dev_err(&pdev->dev, "RTC register failed: %d\n", ret); + return ret; + } + + as3722_rtc->alarm_irq = platform_get_irq(pdev, 0); + dev_info(&pdev->dev, "RTC interrupt %d\n", as3722_rtc->alarm_irq); + + ret = devm_request_threaded_irq(&pdev->dev, as3722_rtc->alarm_irq, NULL, + as3722_alarm_irq, IRQF_ONESHOT | IRQF_EARLY_RESUME, + "rtc-alarm", as3722_rtc); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n", + as3722_rtc->alarm_irq, ret); + return ret; + } + disable_irq(as3722_rtc->alarm_irq); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int as3722_rtc_suspend(struct device *dev) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(as3722_rtc->alarm_irq); + + return 0; +} + +static int as3722_rtc_resume(struct device *dev) +{ + struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(as3722_rtc->alarm_irq); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(as3722_rtc_pm_ops, as3722_rtc_suspend, + as3722_rtc_resume); + +static struct platform_driver as3722_rtc_driver = { + .probe = as3722_rtc_probe, + .driver = { + .name = "as3722-rtc", + .pm = &as3722_rtc_pm_ops, + }, +}; +module_platform_driver(as3722_rtc_driver); + +MODULE_DESCRIPTION("RTC driver for AS3722 PMICs"); +MODULE_ALIAS("platform:as3722-rtc"); +MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-at32ap700x.c b/drivers/rtc/rtc-at32ap700x.c index b2752b6e7a2..aee3387fb09 100644 --- a/drivers/rtc/rtc-at32ap700x.c +++ b/drivers/rtc/rtc-at32ap700x.c @@ -134,36 +134,29 @@ static int at32_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) return ret; } -static int at32_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int at32_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct rtc_at32ap700x *rtc = dev_get_drvdata(dev); int ret = 0; spin_lock_irq(&rtc->lock); - switch (cmd) { - case RTC_AIE_ON: + if (enabled) { if (rtc_readl(rtc, VAL) > rtc->alarm_time) { ret = -EINVAL; - break; + goto out; } rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL) | RTC_BIT(CTRL_TOPEN)); rtc_writel(rtc, ICR, RTC_BIT(ICR_TOPI)); rtc_writel(rtc, IER, RTC_BIT(IER_TOPI)); - break; - case RTC_AIE_OFF: + } else { rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL) & ~RTC_BIT(CTRL_TOPEN)); rtc_writel(rtc, IDR, RTC_BIT(IDR_TOPI)); rtc_writel(rtc, ICR, RTC_BIT(ICR_TOPI)); - break; - default: - ret = -ENOIOCTLCMD; - break; } - +out: spin_unlock_irq(&rtc->lock); return ret; @@ -195,11 +188,11 @@ static irqreturn_t at32_rtc_interrupt(int irq, void *dev_id) } static struct rtc_class_ops at32_rtc_ops = { - .ioctl = at32_rtc_ioctl, .read_time = at32_rtc_readtime, .set_time = at32_rtc_settime, .read_alarm = at32_rtc_readalarm, .set_alarm = at32_rtc_setalarm, + .alarm_irq_enable = at32_rtc_alarm_irq_enable, }; static int __init at32_rtc_probe(struct platform_device *pdev) @@ -209,32 +202,28 @@ static int __init at32_rtc_probe(struct platform_device *pdev) int irq; int ret; - rtc = kzalloc(sizeof(struct rtc_at32ap700x), GFP_KERNEL); - if (!rtc) { - dev_dbg(&pdev->dev, "out of memory\n"); + rtc = devm_kzalloc(&pdev->dev, sizeof(struct rtc_at32ap700x), + GFP_KERNEL); + if (!rtc) return -ENOMEM; - } regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!regs) { dev_dbg(&pdev->dev, "no mmio resource defined\n"); - ret = -ENXIO; - goto out; + return -ENXIO; } irq = platform_get_irq(pdev, 0); if (irq <= 0) { dev_dbg(&pdev->dev, "could not get irq\n"); - ret = -ENXIO; - goto out; + return -ENXIO; } rtc->irq = irq; - rtc->regs = ioremap(regs->start, regs->end - regs->start + 1); + rtc->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); if (!rtc->regs) { - ret = -ENOMEM; dev_dbg(&pdev->dev, "could not map I/O memory\n"); - goto out; + return -ENOMEM; } spin_lock_init(&rtc->lock); @@ -251,20 +240,20 @@ static int __init at32_rtc_probe(struct platform_device *pdev) | RTC_BIT(CTRL_EN)); } - ret = request_irq(irq, at32_rtc_interrupt, IRQF_SHARED, "rtc", rtc); + ret = devm_request_irq(&pdev->dev, irq, at32_rtc_interrupt, IRQF_SHARED, + "rtc", rtc); if (ret) { dev_dbg(&pdev->dev, "could not request irq %d\n", irq); - goto out_iounmap; + return ret; } platform_set_drvdata(pdev, rtc); - rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, + rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &at32_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc)) { dev_dbg(&pdev->dev, "could not register rtc device\n"); - ret = PTR_ERR(rtc->rtc); - goto out_free_irq; + return PTR_ERR(rtc->rtc); } device_init_wakeup(&pdev->dev, 1); @@ -273,29 +262,12 @@ static int __init at32_rtc_probe(struct platform_device *pdev) (unsigned long)rtc->regs, rtc->irq); return 0; - -out_free_irq: - platform_set_drvdata(pdev, NULL); - free_irq(irq, rtc); -out_iounmap: - iounmap(rtc->regs); -out: - kfree(rtc); - return ret; } static int __exit at32_rtc_remove(struct platform_device *pdev) { - struct rtc_at32ap700x *rtc = platform_get_drvdata(pdev); - device_init_wakeup(&pdev->dev, 0); - free_irq(rtc->irq, rtc); - iounmap(rtc->regs); - rtc_device_unregister(rtc->rtc); - kfree(rtc); - platform_set_drvdata(pdev, NULL); - return 0; } @@ -309,17 +281,7 @@ static struct platform_driver at32_rtc_driver = { }, }; -static int __init at32_rtc_init(void) -{ - return platform_driver_probe(&at32_rtc_driver, at32_rtc_probe); -} -module_init(at32_rtc_init); - -static void __exit at32_rtc_exit(void) -{ - platform_driver_unregister(&at32_rtc_driver); -} -module_exit(at32_rtc_exit); +module_platform_driver_probe(at32_rtc_driver, at32_rtc_probe); MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>"); MODULE_DESCRIPTION("Real time clock for AVR32 AT32AP700x"); diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index bc8bbca9a2e..44fe83ee9be 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -25,18 +25,83 @@ #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/interrupt.h> +#include <linux/spinlock.h> #include <linux/ioctl.h> #include <linux/completion.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/uaccess.h> -#include <asm/uaccess.h> - -#include <mach/at91_rtc.h> +#include "rtc-at91rm9200.h" +#define at91_rtc_read(field) \ + __raw_readl(at91_rtc_regs + field) +#define at91_rtc_write(field, val) \ + __raw_writel((val), at91_rtc_regs + field) #define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */ +struct at91_rtc_config { + bool use_shadow_imr; +}; + +static const struct at91_rtc_config *at91_rtc_config; static DECLARE_COMPLETION(at91_rtc_updated); +static DECLARE_COMPLETION(at91_rtc_upd_rdy); static unsigned int at91_alarm_year = AT91_RTC_EPOCH; +static void __iomem *at91_rtc_regs; +static int irq; +static DEFINE_SPINLOCK(at91_rtc_lock); +static u32 at91_rtc_shadow_imr; + +static void at91_rtc_write_ier(u32 mask) +{ + unsigned long flags; + + spin_lock_irqsave(&at91_rtc_lock, flags); + at91_rtc_shadow_imr |= mask; + at91_rtc_write(AT91_RTC_IER, mask); + spin_unlock_irqrestore(&at91_rtc_lock, flags); +} + +static void at91_rtc_write_idr(u32 mask) +{ + unsigned long flags; + + spin_lock_irqsave(&at91_rtc_lock, flags); + at91_rtc_write(AT91_RTC_IDR, mask); + /* + * Register read back (of any RTC-register) needed to make sure + * IDR-register write has reached the peripheral before updating + * shadow mask. + * + * Note that there is still a possibility that the mask is updated + * before interrupts have actually been disabled in hardware. The only + * way to be certain would be to poll the IMR-register, which is is + * the very register we are trying to emulate. The register read back + * is a reasonable heuristic. + */ + at91_rtc_read(AT91_RTC_SR); + at91_rtc_shadow_imr &= ~mask; + spin_unlock_irqrestore(&at91_rtc_lock, flags); +} + +static u32 at91_rtc_read_imr(void) +{ + unsigned long flags; + u32 mask; + + if (at91_rtc_config->use_shadow_imr) { + spin_lock_irqsave(&at91_rtc_lock, flags); + mask = at91_rtc_shadow_imr; + spin_unlock_irqrestore(&at91_rtc_lock, flags); + } else { + mask = at91_rtc_read(AT91_RTC_IMR); + } + + return mask; +} /* * Decode time/date into rtc_time structure @@ -48,10 +113,10 @@ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, /* must read twice in case it changes */ do { - time = at91_sys_read(timereg); - date = at91_sys_read(calreg); - } while ((time != at91_sys_read(timereg)) || - (date != at91_sys_read(calreg))); + time = at91_rtc_read(timereg); + date = at91_rtc_read(calreg); + } while ((time != at91_rtc_read(timereg)) || + (date != at91_rtc_read(calreg))); tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0); tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8); @@ -60,7 +125,7 @@ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, /* * The Calendar Alarm register does not have a field for * the year - so these will return an invalid value. When an - * alarm is set, at91_alarm_year wille store the current year. + * alarm is set, at91_alarm_year will store the current year. */ tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */ tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */ @@ -79,7 +144,7 @@ static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm) tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); tm->tm_year = tm->tm_year - 1900; - pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, + dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); @@ -93,24 +158,26 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) { unsigned long cr; - pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, + dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); + wait_for_completion(&at91_rtc_upd_rdy); + /* Stop Time/Calendar from counting */ - cr = at91_sys_read(AT91_RTC_CR); - at91_sys_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); + cr = at91_rtc_read(AT91_RTC_CR); + at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); - at91_sys_write(AT91_RTC_IER, AT91_RTC_ACKUPD); + at91_rtc_write_ier(AT91_RTC_ACKUPD); wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD); + at91_rtc_write_idr(AT91_RTC_ACKUPD); - at91_sys_write(AT91_RTC_TIMR, + at91_rtc_write(AT91_RTC_TIMR, bin2bcd(tm->tm_sec) << 0 | bin2bcd(tm->tm_min) << 8 | bin2bcd(tm->tm_hour) << 16); - at91_sys_write(AT91_RTC_CALR, + at91_rtc_write(AT91_RTC_CALR, bin2bcd((tm->tm_year + 1900) / 100) /* century */ | bin2bcd(tm->tm_year % 100) << 8 /* year */ | bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */ @@ -118,8 +185,10 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) | bin2bcd(tm->tm_mday) << 24); /* Restart Time/Calendar */ - cr = at91_sys_read(AT91_RTC_CR); - at91_sys_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); + cr = at91_rtc_read(AT91_RTC_CR); + at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_SECEV); + at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); + at91_rtc_write_ier(AT91_RTC_SECEV); return 0; } @@ -135,10 +204,10 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); tm->tm_year = at91_alarm_year - 1900; - alrm->enabled = (at91_sys_read(AT91_RTC_IMR) & AT91_RTC_ALARM) + alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM) ? 1 : 0; - pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, + dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); @@ -156,73 +225,53 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) at91_alarm_year = tm.tm_year; + tm.tm_mon = alrm->time.tm_mon; + tm.tm_mday = alrm->time.tm_mday; tm.tm_hour = alrm->time.tm_hour; tm.tm_min = alrm->time.tm_min; tm.tm_sec = alrm->time.tm_sec; - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM); - at91_sys_write(AT91_RTC_TIMALR, + at91_rtc_write_idr(AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_TIMALR, bin2bcd(tm.tm_sec) << 0 | bin2bcd(tm.tm_min) << 8 | bin2bcd(tm.tm_hour) << 16 | AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN); - at91_sys_write(AT91_RTC_CALALR, + at91_rtc_write(AT91_RTC_CALALR, bin2bcd(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */ | bin2bcd(tm.tm_mday) << 24 | AT91_RTC_DATEEN | AT91_RTC_MTHEN); if (alrm->enabled) { - at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM); - at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); + at91_rtc_write_ier(AT91_RTC_ALARM); } - pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, + dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); return 0; } -/* - * Handle commands from user-space - */ -static int at91_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { - int ret = 0; + dev_dbg(dev, "%s(): cmd=%08x\n", __func__, enabled); - pr_debug("%s(): cmd=%08x, arg=%08lx.\n", __func__, cmd, arg); - - /* important: scrub old status before enabling IRQs */ - switch (cmd) { - case RTC_AIE_OFF: /* alarm off */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM); - break; - case RTC_AIE_ON: /* alarm on */ - at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM); - at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM); - break; - case RTC_UIE_OFF: /* update off */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_SECEV); - break; - case RTC_UIE_ON: /* update on */ - at91_sys_write(AT91_RTC_SCCR, AT91_RTC_SECEV); - at91_sys_write(AT91_RTC_IER, AT91_RTC_SECEV); - break; - default: - ret = -ENOIOCTLCMD; - break; - } + if (enabled) { + at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); + at91_rtc_write_ier(AT91_RTC_ALARM); + } else + at91_rtc_write_idr(AT91_RTC_ALARM); - return ret; + return 0; } - /* * Provide additional RTC information in /proc/driver/rtc */ static int at91_rtc_proc(struct device *dev, struct seq_file *seq) { - unsigned long imr = at91_sys_read(AT91_RTC_IMR); + unsigned long imr = at91_rtc_read_imr(); seq_printf(seq, "update_IRQ\t: %s\n", (imr & AT91_RTC_ACKUPD) ? "yes" : "no"); @@ -242,20 +291,22 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) unsigned int rtsr; unsigned long events = 0; - rtsr = at91_sys_read(AT91_RTC_SR) & at91_sys_read(AT91_RTC_IMR); + rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read_imr(); if (rtsr) { /* this interrupt is shared! Is it ours? */ if (rtsr & AT91_RTC_ALARM) events |= (RTC_AF | RTC_IRQF); - if (rtsr & AT91_RTC_SECEV) - events |= (RTC_UF | RTC_IRQF); + if (rtsr & AT91_RTC_SECEV) { + complete(&at91_rtc_upd_rdy); + at91_rtc_write_idr(AT91_RTC_SECEV); + } if (rtsr & AT91_RTC_ACKUPD) complete(&at91_rtc_updated); - at91_sys_write(AT91_RTC_SCCR, rtsr); /* clear status reg */ + at91_rtc_write(AT91_RTC_SCCR, rtsr); /* clear status reg */ rtc_update_irq(rtc, 1, events); - pr_debug("%s(): num=%ld, events=0x%02lx\n", __func__, + dev_dbg(&pdev->dev, "%s(): num=%ld, events=0x%02lx\n", __func__, events >> 8, events & 0x000000FF); return IRQ_HANDLED; @@ -263,13 +314,50 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) return IRQ_NONE; /* not handled */ } +static const struct at91_rtc_config at91rm9200_config = { +}; + +static const struct at91_rtc_config at91sam9x5_config = { + .use_shadow_imr = true, +}; + +#ifdef CONFIG_OF +static const struct of_device_id at91_rtc_dt_ids[] = { + { + .compatible = "atmel,at91rm9200-rtc", + .data = &at91rm9200_config, + }, { + .compatible = "atmel,at91sam9x5-rtc", + .data = &at91sam9x5_config, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids); +#endif + +static const struct at91_rtc_config * +at91_rtc_get_config(struct platform_device *pdev) +{ + const struct of_device_id *match; + + if (pdev->dev.of_node) { + match = of_match_node(at91_rtc_dt_ids, pdev->dev.of_node); + if (!match) + return NULL; + return (const struct at91_rtc_config *)match->data; + } + + return &at91rm9200_config; +} + static const struct rtc_class_ops at91_rtc_ops = { - .ioctl = at91_rtc_ioctl, .read_time = at91_rtc_readtime, .set_time = at91_rtc_settime, .read_alarm = at91_rtc_readalarm, .set_alarm = at91_rtc_setalarm, .proc = at91_rtc_proc, + .alarm_irq_enable = at91_rtc_alarm_irq_enable, }; /* @@ -278,22 +366,45 @@ static const struct rtc_class_ops at91_rtc_ops = { static int __init at91_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; - int ret; + struct resource *regs; + int ret = 0; + + at91_rtc_config = at91_rtc_get_config(pdev); + if (!at91_rtc_config) + return -ENODEV; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(&pdev->dev, "no mmio resource defined\n"); + return -ENXIO; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq resource defined\n"); + return -ENXIO; + } + + at91_rtc_regs = devm_ioremap(&pdev->dev, regs->start, + resource_size(regs)); + if (!at91_rtc_regs) { + dev_err(&pdev->dev, "failed to map registers, aborting.\n"); + return -ENOMEM; + } - at91_sys_write(AT91_RTC_CR, 0); - at91_sys_write(AT91_RTC_MR, 0); /* 24 hour mode */ + at91_rtc_write(AT91_RTC_CR, 0); + at91_rtc_write(AT91_RTC_MR, 0); /* 24 hour mode */ /* Disable all interrupts */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM | AT91_RTC_SECEV | AT91_RTC_TIMEV | AT91_RTC_CALEV); - ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt, + ret = devm_request_irq(&pdev->dev, irq, at91_rtc_interrupt, IRQF_SHARED, "at91_rtc", pdev); if (ret) { - printk(KERN_ERR "at91_rtc: IRQ %d already in use.\n", - AT91_ID_SYS); + dev_err(&pdev->dev, "IRQ %d already in use.\n", irq); return ret; } @@ -303,15 +414,18 @@ static int __init at91_rtc_probe(struct platform_device *pdev) if (!device_can_wakeup(&pdev->dev)) device_init_wakeup(&pdev->dev, 1); - rtc = rtc_device_register(pdev->name, &pdev->dev, + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &at91_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - free_irq(AT91_ID_SYS, pdev); + if (IS_ERR(rtc)) return PTR_ERR(rtc); - } platform_set_drvdata(pdev, rtc); - printk(KERN_INFO "AT91 Real Time Clock driver.\n"); + /* enable SECEV interrupt in order to initialize at91_rtc_upd_rdy + * completion. + */ + at91_rtc_write_ier(AT91_RTC_SECEV); + + dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n"); return 0; } @@ -320,21 +434,23 @@ static int __init at91_rtc_probe(struct platform_device *pdev) */ static int __exit at91_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - /* Disable all interrupts */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM | AT91_RTC_SECEV | AT91_RTC_TIMEV | AT91_RTC_CALEV); - free_irq(AT91_ID_SYS, pdev); - - rtc_device_unregister(rtc); - platform_set_drvdata(pdev, NULL); return 0; } -#ifdef CONFIG_PM +static void at91_rtc_shutdown(struct platform_device *pdev) +{ + /* Disable all interrupts */ + at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + AT91_RTC_SECEV | AT91_RTC_TIMEV | + AT91_RTC_CALEV); +} + +#ifdef CONFIG_PM_SLEEP /* AT91RM9200 RTC Power management control */ @@ -345,13 +461,13 @@ static int at91_rtc_suspend(struct device *dev) /* this IRQ is shared with DBGU and other hardware which isn't * necessarily doing PM like we are... */ - at91_rtc_imr = at91_sys_read(AT91_RTC_IMR) + at91_rtc_imr = at91_rtc_read_imr() & (AT91_RTC_ALARM|AT91_RTC_SECEV); if (at91_rtc_imr) { if (device_may_wakeup(dev)) - enable_irq_wake(AT91_ID_SYS); + enable_irq_wake(irq); else - at91_sys_write(AT91_RTC_IDR, at91_rtc_imr); + at91_rtc_write_idr(at91_rtc_imr); } return 0; } @@ -360,45 +476,28 @@ static int at91_rtc_resume(struct device *dev) { if (at91_rtc_imr) { if (device_may_wakeup(dev)) - disable_irq_wake(AT91_ID_SYS); + disable_irq_wake(irq); else - at91_sys_write(AT91_RTC_IER, at91_rtc_imr); + at91_rtc_write_ier(at91_rtc_imr); } return 0; } - -static const struct dev_pm_ops at91_rtc_pm = { - .suspend = at91_rtc_suspend, - .resume = at91_rtc_resume, -}; - -#define at91_rtc_pm_ptr &at91_rtc_pm - -#else -#define at91_rtc_pm_ptr NULL #endif +static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume); + static struct platform_driver at91_rtc_driver = { .remove = __exit_p(at91_rtc_remove), + .shutdown = at91_rtc_shutdown, .driver = { .name = "at91_rtc", .owner = THIS_MODULE, - .pm = at91_rtc_pm_ptr, + .pm = &at91_rtc_pm_ops, + .of_match_table = of_match_ptr(at91_rtc_dt_ids), }, }; -static int __init at91_rtc_init(void) -{ - return platform_driver_probe(&at91_rtc_driver, at91_rtc_probe); -} - -static void __exit at91_rtc_exit(void) -{ - platform_driver_unregister(&at91_rtc_driver); -} - -module_init(at91_rtc_init); -module_exit(at91_rtc_exit); +module_platform_driver_probe(at91_rtc_driver, at91_rtc_probe); MODULE_AUTHOR("Rick Bronson"); MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200"); diff --git a/drivers/rtc/rtc-at91rm9200.h b/drivers/rtc/rtc-at91rm9200.h new file mode 100644 index 00000000000..da1945e5f71 --- /dev/null +++ b/drivers/rtc/rtc-at91rm9200.h @@ -0,0 +1,75 @@ +/* + * arch/arm/mach-at91/include/mach/at91_rtc.h + * + * Copyright (C) 2005 Ivan Kokshaysky + * Copyright (C) SAN People + * + * Real Time Clock (RTC) - System peripheral registers. + * Based on AT91RM9200 datasheet revision E. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef AT91_RTC_H +#define AT91_RTC_H + +#define AT91_RTC_CR 0x00 /* Control Register */ +#define AT91_RTC_UPDTIM (1 << 0) /* Update Request Time Register */ +#define AT91_RTC_UPDCAL (1 << 1) /* Update Request Calendar Register */ +#define AT91_RTC_TIMEVSEL (3 << 8) /* Time Event Selection */ +#define AT91_RTC_TIMEVSEL_MINUTE (0 << 8) +#define AT91_RTC_TIMEVSEL_HOUR (1 << 8) +#define AT91_RTC_TIMEVSEL_DAY24 (2 << 8) +#define AT91_RTC_TIMEVSEL_DAY12 (3 << 8) +#define AT91_RTC_CALEVSEL (3 << 16) /* Calendar Event Selection */ +#define AT91_RTC_CALEVSEL_WEEK (0 << 16) +#define AT91_RTC_CALEVSEL_MONTH (1 << 16) +#define AT91_RTC_CALEVSEL_YEAR (2 << 16) + +#define AT91_RTC_MR 0x04 /* Mode Register */ +#define AT91_RTC_HRMOD (1 << 0) /* 12/24 Hour Mode */ + +#define AT91_RTC_TIMR 0x08 /* Time Register */ +#define AT91_RTC_SEC (0x7f << 0) /* Current Second */ +#define AT91_RTC_MIN (0x7f << 8) /* Current Minute */ +#define AT91_RTC_HOUR (0x3f << 16) /* Current Hour */ +#define AT91_RTC_AMPM (1 << 22) /* Ante Meridiem Post Meridiem Indicator */ + +#define AT91_RTC_CALR 0x0c /* Calendar Register */ +#define AT91_RTC_CENT (0x7f << 0) /* Current Century */ +#define AT91_RTC_YEAR (0xff << 8) /* Current Year */ +#define AT91_RTC_MONTH (0x1f << 16) /* Current Month */ +#define AT91_RTC_DAY (7 << 21) /* Current Day */ +#define AT91_RTC_DATE (0x3f << 24) /* Current Date */ + +#define AT91_RTC_TIMALR 0x10 /* Time Alarm Register */ +#define AT91_RTC_SECEN (1 << 7) /* Second Alarm Enable */ +#define AT91_RTC_MINEN (1 << 15) /* Minute Alarm Enable */ +#define AT91_RTC_HOUREN (1 << 23) /* Hour Alarm Enable */ + +#define AT91_RTC_CALALR 0x14 /* Calendar Alarm Register */ +#define AT91_RTC_MTHEN (1 << 23) /* Month Alarm Enable */ +#define AT91_RTC_DATEEN (1 << 31) /* Date Alarm Enable */ + +#define AT91_RTC_SR 0x18 /* Status Register */ +#define AT91_RTC_ACKUPD (1 << 0) /* Acknowledge for Update */ +#define AT91_RTC_ALARM (1 << 1) /* Alarm Flag */ +#define AT91_RTC_SECEV (1 << 2) /* Second Event */ +#define AT91_RTC_TIMEV (1 << 3) /* Time Event */ +#define AT91_RTC_CALEV (1 << 4) /* Calendar Event */ + +#define AT91_RTC_SCCR 0x1c /* Status Clear Command Register */ +#define AT91_RTC_IER 0x20 /* Interrupt Enable Register */ +#define AT91_RTC_IDR 0x24 /* Interrupt Disable Register */ +#define AT91_RTC_IMR 0x28 /* Interrupt Mask Register */ + +#define AT91_RTC_VER 0x2c /* Valid Entry Register */ +#define AT91_RTC_NVTIM (1 << 0) /* Non valid Time */ +#define AT91_RTC_NVCAL (1 << 1) /* Non valid Calendar */ +#define AT91_RTC_NVTIMALR (1 << 2) /* Non valid Time Alarm */ +#define AT91_RTC_NVCALALR (1 << 3) /* Non valid Calendar Alarm */ + +#endif diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c index f677e0710ca..59637430453 100644 --- a/drivers/rtc/rtc-at91sam9.c +++ b/drivers/rtc/rtc-at91sam9.c @@ -19,11 +19,12 @@ #include <linux/interrupt.h> #include <linux/ioctl.h> #include <linux/slab.h> +#include <linux/platform_data/atmel.h> +#include <linux/io.h> -#include <mach/board.h> #include <mach/at91_rtt.h> #include <mach/cpu.h> - +#include <mach/hardware.h> /* * This driver uses two configurable hardware resources that live in the @@ -57,6 +58,8 @@ struct sam9_rtc { void __iomem *rtt; struct rtc_device *rtcdev; u32 imr; + void __iomem *gpbr; + int irq; }; #define rtt_readl(rtc, field) \ @@ -65,9 +68,9 @@ struct sam9_rtc { __raw_writel((val), (rtc)->rtt + AT91_RTT_ ## field) #define gpbr_readl(rtc) \ - at91_sys_read(AT91_GPBR + 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR) + __raw_readl((rtc)->gpbr) #define gpbr_writel(rtc, val) \ - at91_sys_write(AT91_GPBR + 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR, (val)) + __raw_writel((val), (rtc)->gpbr) /* * Read current time and date in RTC @@ -216,37 +219,17 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) return 0; } -/* - * Handle commands from user-space - */ -static int at91_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct sam9_rtc *rtc = dev_get_drvdata(dev); - int ret = 0; u32 mr = rtt_readl(rtc, MR); - dev_dbg(dev, "ioctl: cmd=%08x, arg=%08lx, mr %08x\n", cmd, arg, mr); - - switch (cmd) { - case RTC_AIE_OFF: /* alarm off */ - rtt_writel(rtc, MR, mr & ~AT91_RTT_ALMIEN); - break; - case RTC_AIE_ON: /* alarm on */ + dev_dbg(dev, "alarm_irq_enable: enabled=%08x, mr %08x\n", enabled, mr); + if (enabled) rtt_writel(rtc, MR, mr | AT91_RTT_ALMIEN); - break; - case RTC_UIE_OFF: /* update off */ - rtt_writel(rtc, MR, mr & ~AT91_RTT_RTTINCIEN); - break; - case RTC_UIE_ON: /* update on */ - rtt_writel(rtc, MR, mr | AT91_RTT_RTTINCIEN); - break; - default: - ret = -ENOIOCTLCMD; - break; - } - - return ret; + else + rtt_writel(rtc, MR, mr & ~AT91_RTT_ALMIEN); + return 0; } /* @@ -296,39 +279,60 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *_rtc) } static const struct rtc_class_ops at91_rtc_ops = { - .ioctl = at91_rtc_ioctl, .read_time = at91_rtc_readtime, .set_time = at91_rtc_settime, .read_alarm = at91_rtc_readalarm, .set_alarm = at91_rtc_setalarm, .proc = at91_rtc_proc, + .alarm_irq_enable = at91_rtc_alarm_irq_enable, }; /* * Initialize and install RTC driver */ -static int __init at91_rtc_probe(struct platform_device *pdev) +static int at91_rtc_probe(struct platform_device *pdev) { - struct resource *r; + struct resource *r, *r_gpbr; struct sam9_rtc *rtc; - int ret; + int ret, irq; u32 mr; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!r) + r_gpbr = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!r || !r_gpbr) { + dev_err(&pdev->dev, "need 2 ressources\n"); return -ENODEV; + } - rtc = kzalloc(sizeof *rtc, GFP_KERNEL); + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "failed to get interrupt resource\n"); + return irq; + } + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); if (!rtc) return -ENOMEM; + rtc->irq = irq; + /* platform setup code should have handled this; sigh */ if (!device_can_wakeup(&pdev->dev)) device_init_wakeup(&pdev->dev, 1); platform_set_drvdata(pdev, rtc); - rtc->rtt = (void __force __iomem *) (AT91_VA_BASE_SYS - AT91_BASE_SYS); - rtc->rtt += r->start; + rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r)); + if (!rtc->rtt) { + dev_err(&pdev->dev, "failed to map registers, aborting.\n"); + return -ENOMEM; + } + + rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start, + resource_size(r_gpbr)); + if (!rtc->gpbr) { + dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n"); + return -ENOMEM; + } mr = rtt_readl(rtc, MR); @@ -342,21 +346,17 @@ static int __init at91_rtc_probe(struct platform_device *pdev) mr &= ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN); rtt_writel(rtc, MR, mr); - rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev, - &at91_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc->rtcdev)) { - ret = PTR_ERR(rtc->rtcdev); - goto fail; - } + rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name, + &at91_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtcdev)) + return PTR_ERR(rtc->rtcdev); /* register irq handler after we know what name we'll use */ - ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt, - IRQF_DISABLED | IRQF_SHARED, - dev_name(&rtc->rtcdev->dev), rtc); + ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt, + IRQF_SHARED, dev_name(&rtc->rtcdev->dev), rtc); if (ret) { - dev_dbg(&pdev->dev, "can't share IRQ %d?\n", AT91_ID_SYS); - rtc_device_unregister(rtc->rtcdev); - goto fail; + dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq); + return ret; } /* NOTE: sam9260 rev A silicon has a ROM bug which resets the @@ -370,29 +370,19 @@ static int __init at91_rtc_probe(struct platform_device *pdev) dev_name(&rtc->rtcdev->dev)); return 0; - -fail: - platform_set_drvdata(pdev, NULL); - kfree(rtc); - return ret; } /* * Disable and remove the RTC driver */ -static int __exit at91_rtc_remove(struct platform_device *pdev) +static int at91_rtc_remove(struct platform_device *pdev) { struct sam9_rtc *rtc = platform_get_drvdata(pdev); u32 mr = rtt_readl(rtc, MR); /* disable all interrupts */ rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN)); - free_irq(AT91_ID_SYS, rtc); - rtc_device_unregister(rtc->rtcdev); - - platform_set_drvdata(pdev, NULL); - kfree(rtc); return 0; } @@ -405,14 +395,13 @@ static void at91_rtc_shutdown(struct platform_device *pdev) rtt_writel(rtc, MR, mr & ~rtc->imr); } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP /* AT91SAM9 RTC Power management control */ -static int at91_rtc_suspend(struct platform_device *pdev, - pm_message_t state) +static int at91_rtc_suspend(struct device *dev) { - struct sam9_rtc *rtc = platform_get_drvdata(pdev); + struct sam9_rtc *rtc = dev_get_drvdata(dev); u32 mr = rtt_readl(rtc, MR); /* @@ -421,8 +410,8 @@ static int at91_rtc_suspend(struct platform_device *pdev, */ rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN); if (rtc->imr) { - if (device_may_wakeup(&pdev->dev) && (mr & AT91_RTT_ALMIEN)) { - enable_irq_wake(AT91_ID_SYS); + if (device_may_wakeup(dev) && (mr & AT91_RTT_ALMIEN)) { + enable_irq_wake(rtc->irq); /* don't let RTTINC cause wakeups */ if (mr & AT91_RTT_RTTINCIEN) rtt_writel(rtc, MR, mr & ~AT91_RTT_RTTINCIEN); @@ -433,92 +422,36 @@ static int at91_rtc_suspend(struct platform_device *pdev, return 0; } -static int at91_rtc_resume(struct platform_device *pdev) +static int at91_rtc_resume(struct device *dev) { - struct sam9_rtc *rtc = platform_get_drvdata(pdev); + struct sam9_rtc *rtc = dev_get_drvdata(dev); u32 mr; if (rtc->imr) { - if (device_may_wakeup(&pdev->dev)) - disable_irq_wake(AT91_ID_SYS); + if (device_may_wakeup(dev)) + disable_irq_wake(rtc->irq); mr = rtt_readl(rtc, MR); rtt_writel(rtc, MR, mr | rtc->imr); } return 0; } -#else -#define at91_rtc_suspend NULL -#define at91_rtc_resume NULL #endif +static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume); + static struct platform_driver at91_rtc_driver = { - .driver.name = "rtc-at91sam9", - .driver.owner = THIS_MODULE, - .remove = __exit_p(at91_rtc_remove), + .probe = at91_rtc_probe, + .remove = at91_rtc_remove, .shutdown = at91_rtc_shutdown, - .suspend = at91_rtc_suspend, - .resume = at91_rtc_resume, + .driver = { + .name = "rtc-at91sam9", + .owner = THIS_MODULE, + .pm = &at91_rtc_pm_ops, + }, }; -/* Chips can have more than one RTT module, and they can be used for more - * than just RTCs. So we can't just register as "the" RTT driver. - * - * A normal approach in such cases is to create a library to allocate and - * free the modules. Here we just use bus_find_device() as like such a - * library, binding directly ... no runtime "library" footprint is needed. - */ -static int __init at91_rtc_match(struct device *dev, void *v) -{ - struct platform_device *pdev = to_platform_device(dev); - int ret; - - /* continue searching if this isn't the RTT we need */ - if (strcmp("at91_rtt", pdev->name) != 0 - || pdev->id != CONFIG_RTC_DRV_AT91SAM9_RTT) - goto fail; - - /* else we found it ... but fail unless we can bind to the RTC driver */ - if (dev->driver) { - dev_dbg(dev, "busy, can't use as RTC!\n"); - goto fail; - } - dev->driver = &at91_rtc_driver.driver; - if (device_attach(dev) == 0) { - dev_dbg(dev, "can't attach RTC!\n"); - goto fail; - } - ret = at91_rtc_probe(pdev); - if (ret == 0) - return true; - - dev_dbg(dev, "RTC probe err %d!\n", ret); -fail: - return false; -} - -static int __init at91_rtc_init(void) -{ - int status; - struct device *rtc; - - status = platform_driver_register(&at91_rtc_driver); - if (status) - return status; - rtc = bus_find_device(&platform_bus_type, NULL, - NULL, at91_rtc_match); - if (!rtc) - platform_driver_unregister(&at91_rtc_driver); - return rtc ? 0 : -ENODEV; -} -module_init(at91_rtc_init); - -static void __exit at91_rtc_exit(void) -{ - platform_driver_unregister(&at91_rtc_driver); -} -module_exit(at91_rtc_exit); - +module_platform_driver(at91_rtc_driver); MODULE_AUTHOR("Michel Benoit"); MODULE_DESCRIPTION("RTC driver for Atmel AT91SAM9x"); diff --git a/drivers/rtc/rtc-au1xxx.c b/drivers/rtc/rtc-au1xxx.c index 979ed0406ce..ed526a192ce 100644 --- a/drivers/rtc/rtc-au1xxx.c +++ b/drivers/rtc/rtc-au1xxx.c @@ -62,7 +62,7 @@ static struct rtc_class_ops au1xtoy_rtc_ops = { .set_time = au1xtoy_rtc_set_time, }; -static int __devinit au1xtoy_rtc_probe(struct platform_device *pdev) +static int au1xtoy_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtcdev; unsigned long t; @@ -101,7 +101,7 @@ static int __devinit au1xtoy_rtc_probe(struct platform_device *pdev) while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_C0S) msleep(1); - rtcdev = rtc_device_register("rtc-au1xxx", &pdev->dev, + rtcdev = devm_rtc_device_register(&pdev->dev, "rtc-au1xxx", &au1xtoy_rtc_ops, THIS_MODULE); if (IS_ERR(rtcdev)) { ret = PTR_ERR(rtcdev); @@ -116,36 +116,14 @@ out_err: return ret; } -static int __devexit au1xtoy_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtcdev = platform_get_drvdata(pdev); - - rtc_device_unregister(rtcdev); - platform_set_drvdata(pdev, NULL); - - return 0; -} - static struct platform_driver au1xrtc_driver = { .driver = { .name = "rtc-au1xxx", .owner = THIS_MODULE, }, - .remove = __devexit_p(au1xtoy_rtc_remove), }; -static int __init au1xtoy_rtc_init(void) -{ - return platform_driver_probe(&au1xrtc_driver, au1xtoy_rtc_probe); -} - -static void __exit au1xtoy_rtc_exit(void) -{ - platform_driver_unregister(&au1xrtc_driver); -} - -module_init(au1xtoy_rtc_init); -module_exit(au1xtoy_rtc_exit); +module_platform_driver_probe(au1xrtc_driver, au1xtoy_rtc_probe); MODULE_DESCRIPTION("Au1xxx TOY-counter-based RTC driver"); MODULE_AUTHOR("Manuel Lauss <manuel.lauss@gmail.com>"); diff --git a/drivers/rtc/rtc-bfin.c b/drivers/rtc/rtc-bfin.c index b4b6087f223..fe4bdb06a55 100644 --- a/drivers/rtc/rtc-bfin.c +++ b/drivers/rtc/rtc-bfin.c @@ -20,9 +20,9 @@ * write would be discarded and things quickly fall apart. * * To keep this delay from significantly degrading performance (we, in theory, - * would have to sleep for up to 1 second everytime we wanted to write a + * would have to sleep for up to 1 second every time we wanted to write a * register), we only check the write pending status before we start to issue - * a new write. We bank on the idea that it doesnt matter when the sync + * a new write. We bank on the idea that it doesn't matter when the sync * happens so long as we don't attempt another write before it does. The only * time userspace would take this penalty is when they try and do multiple * operations right after another ... but in this case, they need to take the @@ -240,40 +240,18 @@ static void bfin_rtc_int_set_alarm(struct bfin_rtc *rtc) */ bfin_rtc_int_set(rtc->rtc_alarm.tm_yday == -1 ? RTC_ISTAT_ALARM : RTC_ISTAT_ALARM_DAY); } -static int bfin_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) + +static int bfin_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct bfin_rtc *rtc = dev_get_drvdata(dev); - int ret = 0; dev_dbg_stamp(dev); - - bfin_rtc_sync_pending(dev); - - switch (cmd) { - case RTC_UIE_ON: - dev_dbg_stamp(dev); - bfin_rtc_int_set(RTC_ISTAT_SEC); - break; - case RTC_UIE_OFF: - dev_dbg_stamp(dev); - bfin_rtc_int_clear(~RTC_ISTAT_SEC); - break; - - case RTC_AIE_ON: - dev_dbg_stamp(dev); + if (enabled) bfin_rtc_int_set_alarm(rtc); - break; - case RTC_AIE_OFF: - dev_dbg_stamp(dev); + else bfin_rtc_int_clear(~(RTC_ISTAT_ALARM | RTC_ISTAT_ALARM_DAY)); - break; - - default: - dev_dbg_stamp(dev); - ret = -ENOIOCTLCMD; - } - return ret; + return 0; } static int bfin_rtc_read_time(struct device *dev, struct rtc_time *tm) @@ -356,42 +334,44 @@ static int bfin_rtc_proc(struct device *dev, struct seq_file *seq) } static struct rtc_class_ops bfin_rtc_ops = { - .ioctl = bfin_rtc_ioctl, .read_time = bfin_rtc_read_time, .set_time = bfin_rtc_set_time, .read_alarm = bfin_rtc_read_alarm, .set_alarm = bfin_rtc_set_alarm, .proc = bfin_rtc_proc, + .alarm_irq_enable = bfin_rtc_alarm_irq_enable, }; -static int __devinit bfin_rtc_probe(struct platform_device *pdev) +static int bfin_rtc_probe(struct platform_device *pdev) { struct bfin_rtc *rtc; struct device *dev = &pdev->dev; - int ret = 0; + int ret; unsigned long timeout = jiffies + HZ; dev_dbg_stamp(dev); /* Allocate memory for our RTC struct */ - rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); + rtc = devm_kzalloc(dev, sizeof(*rtc), GFP_KERNEL); if (unlikely(!rtc)) return -ENOMEM; platform_set_drvdata(pdev, rtc); device_init_wakeup(dev, 1); /* Register our RTC with the RTC framework */ - rtc->rtc_dev = rtc_device_register(pdev->name, dev, &bfin_rtc_ops, + rtc->rtc_dev = devm_rtc_device_register(dev, pdev->name, &bfin_rtc_ops, THIS_MODULE); - if (unlikely(IS_ERR(rtc->rtc_dev))) { - ret = PTR_ERR(rtc->rtc_dev); - goto err; - } + if (unlikely(IS_ERR(rtc->rtc_dev))) + return PTR_ERR(rtc->rtc_dev); /* Grab the IRQ and init the hardware */ - ret = request_irq(IRQ_RTC, bfin_rtc_interrupt, 0, pdev->name, dev); + ret = devm_request_irq(dev, IRQ_RTC, bfin_rtc_interrupt, 0, + pdev->name, dev); if (unlikely(ret)) - goto err_reg; + dev_err(&pdev->dev, + "unable to request IRQ; alarm won't work, " + "and writes will be delayed\n"); + /* sometimes the bootloader touched things, but the write complete was not * enabled, so let's just do a quick timeout here since the IRQ will not fire ... */ @@ -402,33 +382,20 @@ static int __devinit bfin_rtc_probe(struct platform_device *pdev) bfin_write_RTC_SWCNT(0); return 0; - -err_reg: - rtc_device_unregister(rtc->rtc_dev); -err: - kfree(rtc); - return ret; } -static int __devexit bfin_rtc_remove(struct platform_device *pdev) +static int bfin_rtc_remove(struct platform_device *pdev) { - struct bfin_rtc *rtc = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; bfin_rtc_reset(dev, 0); - free_irq(IRQ_RTC, dev); - rtc_device_unregister(rtc->rtc_dev); - platform_set_drvdata(pdev, NULL); - kfree(rtc); return 0; } -#ifdef CONFIG_PM -static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int bfin_rtc_suspend(struct device *dev) { - struct device *dev = &pdev->dev; - dev_dbg_stamp(dev); if (device_may_wakeup(dev)) { @@ -440,10 +407,8 @@ static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state) return 0; } -static int bfin_rtc_resume(struct platform_device *pdev) +static int bfin_rtc_resume(struct device *dev) { - struct device *dev = &pdev->dev; - dev_dbg_stamp(dev); if (device_may_wakeup(dev)) @@ -462,34 +427,21 @@ static int bfin_rtc_resume(struct platform_device *pdev) return 0; } -#else -# define bfin_rtc_suspend NULL -# define bfin_rtc_resume NULL #endif +static SIMPLE_DEV_PM_OPS(bfin_rtc_pm_ops, bfin_rtc_suspend, bfin_rtc_resume); + static struct platform_driver bfin_rtc_driver = { .driver = { .name = "rtc-bfin", .owner = THIS_MODULE, + .pm = &bfin_rtc_pm_ops, }, .probe = bfin_rtc_probe, - .remove = __devexit_p(bfin_rtc_remove), - .suspend = bfin_rtc_suspend, - .resume = bfin_rtc_resume, + .remove = bfin_rtc_remove, }; -static int __init bfin_rtc_init(void) -{ - return platform_driver_register(&bfin_rtc_driver); -} - -static void __exit bfin_rtc_exit(void) -{ - platform_driver_unregister(&bfin_rtc_driver); -} - -module_init(bfin_rtc_init); -module_exit(bfin_rtc_exit); +module_platform_driver(bfin_rtc_driver); MODULE_DESCRIPTION("Blackfin On-Chip Real Time Clock Driver"); MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>"); diff --git a/drivers/rtc/rtc-bq32k.c b/drivers/rtc/rtc-bq32k.c index 408cc8f735b..c74bf0dc52c 100644 --- a/drivers/rtc/rtc-bq32k.c +++ b/drivers/rtc/rtc-bq32k.c @@ -153,7 +153,7 @@ static int bq32k_probe(struct i2c_client *client, if (error) return error; - rtc = rtc_device_register(bq32k_driver.driver.name, &client->dev, + rtc = devm_rtc_device_register(&client->dev, bq32k_driver.driver.name, &bq32k_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -163,14 +163,6 @@ static int bq32k_probe(struct i2c_client *client, return 0; } -static int __devexit bq32k_remove(struct i2c_client *client) -{ - struct rtc_device *rtc = i2c_get_clientdata(client); - - rtc_device_unregister(rtc); - return 0; -} - static const struct i2c_device_id bq32k_id[] = { { "bq32000", 0 }, { } @@ -183,21 +175,10 @@ static struct i2c_driver bq32k_driver = { .owner = THIS_MODULE, }, .probe = bq32k_probe, - .remove = __devexit_p(bq32k_remove), .id_table = bq32k_id, }; -static __init int bq32k_init(void) -{ - return i2c_add_driver(&bq32k_driver); -} -module_init(bq32k_init); - -static __exit void bq32k_exit(void) -{ - i2c_del_driver(&bq32k_driver); -} -module_exit(bq32k_exit); +module_i2c_driver(bq32k_driver); MODULE_AUTHOR("Semihalf, Piotr Ziecik <kosmo@semihalf.com>"); MODULE_DESCRIPTION("TI BQ32000 I2C RTC driver"); diff --git a/drivers/rtc/rtc-bq4802.c b/drivers/rtc/rtc-bq4802.c index 128270ce355..fc0ff87aa5d 100644 --- a/drivers/rtc/rtc-bq4802.c +++ b/drivers/rtc/rtc-bq4802.c @@ -140,9 +140,9 @@ static const struct rtc_class_ops bq4802_ops = { .set_time = bq4802_set_time, }; -static int __devinit bq4802_probe(struct platform_device *pdev) +static int bq4802_probe(struct platform_device *pdev) { - struct bq4802 *p = kzalloc(sizeof(*p), GFP_KERNEL); + struct bq4802 *p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL); int err = -ENOMEM; if (!p) @@ -155,55 +155,35 @@ static int __devinit bq4802_probe(struct platform_device *pdev) p->r = platform_get_resource(pdev, IORESOURCE_IO, 0); err = -EINVAL; if (!p->r) - goto out_free; + goto out; } if (p->r->flags & IORESOURCE_IO) { p->ioport = p->r->start; p->read = bq4802_read_io; p->write = bq4802_write_io; } else if (p->r->flags & IORESOURCE_MEM) { - p->regs = ioremap(p->r->start, resource_size(p->r)); + p->regs = devm_ioremap(&pdev->dev, p->r->start, + resource_size(p->r)); p->read = bq4802_read_mem; p->write = bq4802_write_mem; } else { err = -EINVAL; - goto out_free; + goto out; } platform_set_drvdata(pdev, p); - p->rtc = rtc_device_register("bq4802", &pdev->dev, - &bq4802_ops, THIS_MODULE); + p->rtc = devm_rtc_device_register(&pdev->dev, "bq4802", + &bq4802_ops, THIS_MODULE); if (IS_ERR(p->rtc)) { err = PTR_ERR(p->rtc); - goto out_iounmap; + goto out; } err = 0; out: return err; -out_iounmap: - if (p->r->flags & IORESOURCE_MEM) - iounmap(p->regs); -out_free: - kfree(p); - goto out; -} - -static int __devexit bq4802_remove(struct platform_device *pdev) -{ - struct bq4802 *p = platform_get_drvdata(pdev); - - rtc_device_unregister(p->rtc); - if (p->r->flags & IORESOURCE_MEM) - iounmap(p->regs); - - platform_set_drvdata(pdev, NULL); - - kfree(p); - - return 0; } /* work with hotplug and coldplug */ @@ -215,18 +195,6 @@ static struct platform_driver bq4802_driver = { .owner = THIS_MODULE, }, .probe = bq4802_probe, - .remove = __devexit_p(bq4802_remove), }; -static int __init bq4802_init(void) -{ - return platform_driver_register(&bq4802_driver); -} - -static void __exit bq4802_exit(void) -{ - platform_driver_unregister(&bq4802_driver); -} - -module_init(bq4802_init); -module_exit(bq4802_exit); +module_platform_driver(bq4802_driver); diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index 5856167a0c9..b0e4a3eb33c 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -34,8 +34,11 @@ #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/platform_device.h> -#include <linux/mod_devicetable.h> #include <linux/log2.h> +#include <linux/pm.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/dmi.h> /* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */ #include <asm-generic/rtc.h> @@ -161,7 +164,7 @@ static inline unsigned char cmos_read_bank2(unsigned char addr) static inline void cmos_write_bank2(unsigned char val, unsigned char addr) { outb(addr, RTC_PORT(2)); - outb(val, RTC_PORT(2)); + outb(val, RTC_PORT(3)); } #else @@ -323,7 +326,7 @@ static void cmos_irq_disable(struct cmos_rtc *cmos, unsigned char mask) static int cmos_set_alarm(struct device *dev, struct rtc_wkalrm *t) { struct cmos_rtc *cmos = dev_get_drvdata(dev); - unsigned char mon, mday, hrs, min, sec, rtc_control; + unsigned char mon, mday, hrs, min, sec, rtc_control; if (!is_valid_irq(cmos->irq)) return -EIO; @@ -374,50 +377,51 @@ static int cmos_set_alarm(struct device *dev, struct rtc_wkalrm *t) return 0; } -static int cmos_irq_set_freq(struct device *dev, int freq) -{ - struct cmos_rtc *cmos = dev_get_drvdata(dev); - int f; - unsigned long flags; - - if (!is_valid_irq(cmos->irq)) - return -ENXIO; - - if (!is_power_of_2(freq)) - return -EINVAL; - /* 0 = no irqs; 1 = 2^15 Hz ... 15 = 2^0 Hz */ - f = ffs(freq); - if (f-- > 16) - return -EINVAL; - f = 16 - f; - - spin_lock_irqsave(&rtc_lock, flags); - hpet_set_periodic_freq(freq); - CMOS_WRITE(RTC_REF_CLCK_32KHZ | f, RTC_FREQ_SELECT); - spin_unlock_irqrestore(&rtc_lock, flags); - - return 0; -} +/* + * Do not disable RTC alarm on shutdown - workaround for b0rked BIOSes. + */ +static bool alarm_disable_quirk; -static int cmos_irq_set_state(struct device *dev, int enabled) +static int __init set_alarm_disable_quirk(const struct dmi_system_id *id) { - struct cmos_rtc *cmos = dev_get_drvdata(dev); - unsigned long flags; - - if (!is_valid_irq(cmos->irq)) - return -ENXIO; - - spin_lock_irqsave(&rtc_lock, flags); - - if (enabled) - cmos_irq_enable(cmos, RTC_PIE); - else - cmos_irq_disable(cmos, RTC_PIE); - - spin_unlock_irqrestore(&rtc_lock, flags); + alarm_disable_quirk = true; + pr_info("rtc-cmos: BIOS has alarm-disable quirk. "); + pr_info("RTC alarms disabled\n"); return 0; } +static const struct dmi_system_id rtc_quirks[] __initconst = { + /* https://bugzilla.novell.com/show_bug.cgi?id=805740 */ + { + .callback = set_alarm_disable_quirk, + .ident = "IBM Truman", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "4852570"), + }, + }, + /* https://bugzilla.novell.com/show_bug.cgi?id=812592 */ + { + .callback = set_alarm_disable_quirk, + .ident = "Gigabyte GA-990XA-UD3", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, + "Gigabyte Technology Co., Ltd."), + DMI_MATCH(DMI_PRODUCT_NAME, "GA-990XA-UD3"), + }, + }, + /* http://permalink.gmane.org/gmane.linux.kernel/1604474 */ + { + .callback = set_alarm_disable_quirk, + .ident = "Toshiba Satellite L300", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L300"), + }, + }, + {} +}; + static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct cmos_rtc *cmos = dev_get_drvdata(dev); @@ -426,6 +430,9 @@ static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) if (!is_valid_irq(cmos->irq)) return -EINVAL; + if (alarm_disable_quirk) + return 0; + spin_lock_irqsave(&rtc_lock, flags); if (enabled) @@ -437,25 +444,6 @@ static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int cmos_update_irq_enable(struct device *dev, unsigned int enabled) -{ - struct cmos_rtc *cmos = dev_get_drvdata(dev); - unsigned long flags; - - if (!is_valid_irq(cmos->irq)) - return -EINVAL; - - spin_lock_irqsave(&rtc_lock, flags); - - if (enabled) - cmos_irq_enable(cmos, RTC_UIE); - else - cmos_irq_disable(cmos, RTC_UIE); - - spin_unlock_irqrestore(&rtc_lock, flags); - return 0; -} - #if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE) static int cmos_procfs(struct device *dev, struct seq_file *seq) @@ -500,10 +488,7 @@ static const struct rtc_class_ops cmos_rtc_ops = { .read_alarm = cmos_read_alarm, .set_alarm = cmos_set_alarm, .proc = cmos_procfs, - .irq_set_freq = cmos_irq_set_freq, - .irq_set_state = cmos_irq_set_state, .alarm_irq_enable = cmos_alarm_irq_enable, - .update_irq_enable = cmos_update_irq_enable, }; /*----------------------------------------------------------------*/ @@ -619,17 +604,24 @@ static irqreturn_t cmos_interrupt(int irq, void *p) rtc_control = CMOS_READ(RTC_CONTROL); if (is_hpet_enabled()) irqstat = (unsigned long)irq & 0xF0; - irqstat &= (rtc_control & RTC_IRQMASK) | RTC_IRQF; + + /* If we were suspended, RTC_CONTROL may not be accurate since the + * bios may have cleared it. + */ + if (!cmos_rtc.suspend_ctrl) + irqstat &= (rtc_control & RTC_IRQMASK) | RTC_IRQF; + else + irqstat &= (cmos_rtc.suspend_ctrl & RTC_IRQMASK) | RTC_IRQF; /* All Linux RTC alarms should be treated as if they were oneshot. * Similar code may be needed in system wakeup paths, in case the * alarm woke the system. */ if (irqstat & RTC_AIE) { + cmos_rtc.suspend_ctrl &= ~RTC_AIE; rtc_control &= ~RTC_AIE; CMOS_WRITE(rtc_control, RTC_CONTROL); hpet_mask_rtc_irq_bit(RTC_AIE); - CMOS_READ(RTC_INTR_FLAGS); } spin_unlock(&rtc_lock); @@ -651,10 +643,11 @@ static irqreturn_t cmos_interrupt(int irq, void *p) static int INITSECTION cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) { - struct cmos_rtc_board_info *info = dev->platform_data; + struct cmos_rtc_board_info *info = dev_get_platdata(dev); int retval = 0; unsigned char rtc_control; unsigned address_space; + u32 flags = 0; /* there can be only one ... */ if (cmos_rtc.dev) @@ -668,9 +661,12 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) * REVISIT non-x86 systems may instead use memory space resources * (needing ioremap etc), not i/o space resources like this ... */ - ports = request_region(ports->start, - ports->end + 1 - ports->start, - driver_name); + if (RTC_IOMAPPED) + ports = request_region(ports->start, resource_size(ports), + driver_name); + else + ports = request_mem_region(ports->start, resource_size(ports), + driver_name); if (!ports) { dev_dbg(dev, "i/o registers already in use\n"); return -EBUSY; @@ -687,7 +683,8 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) #if defined(CONFIG_ATARI) address_space = 64; #elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) \ - || defined(__sparc__) || defined(__mips__) + || defined(__sparc__) || defined(__mips__) \ + || defined(__powerpc__) address_space = 128; #else #warning Assuming 128 bytes of RTC+NVRAM address space, not 64 bytes. @@ -706,6 +703,11 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) * expect CMOS_READ and friends to handle. */ if (info) { + if (info->flags) + flags = info->flags; + if (info->address_space) + address_space = info->address_space; + if (info->rtc_day_alarm && info->rtc_day_alarm < 128) cmos_rtc.day_alrm = info->rtc_day_alarm; if (info->rtc_mon_alarm && info->rtc_mon_alarm < 128) @@ -733,18 +735,21 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) spin_lock_irq(&rtc_lock); - /* force periodic irq to CMOS reset default of 1024Hz; - * - * REVISIT it's been reported that at least one x86_64 ALI mobo - * doesn't use 32KHz here ... for portability we might need to - * do something about other clock frequencies. - */ - cmos_rtc.rtc->irq_freq = 1024; - hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq); - CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT); + if (!(flags & CMOS_RTC_FLAGS_NOFREQ)) { + /* force periodic irq to CMOS reset default of 1024Hz; + * + * REVISIT it's been reported that at least one x86_64 ALI + * mobo doesn't use 32KHz here ... for portability we might + * need to do something about other clock frequencies. + */ + cmos_rtc.rtc->irq_freq = 1024; + hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq); + CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT); + } /* disable irqs */ - cmos_irq_disable(&cmos_rtc, RTC_PIE | RTC_AIE | RTC_UIE); + if (is_valid_irq(rtc_irq)) + cmos_irq_disable(&cmos_rtc, RTC_PIE | RTC_AIE | RTC_UIE); rtc_control = CMOS_READ(RTC_CONTROL); @@ -753,7 +758,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) /* FIXME: * <asm-generic/rtc.h> doesn't know 12-hour mode either. */ - if (is_valid_irq(rtc_irq) && !(rtc_control & RTC_24H)) { + if (is_valid_irq(rtc_irq) && !(rtc_control & RTC_24H)) { dev_warn(dev, "only 24-hr supported\n"); retval = -ENXIO; goto cleanup1; @@ -763,12 +768,10 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) irq_handler_t rtc_cmos_int_handler; if (is_hpet_enabled()) { - int err; - rtc_cmos_int_handler = hpet_rtc_interrupt; - err = hpet_register_irq_handler(cmos_interrupt); - if (err != 0) { - printk(KERN_WARNING "hpet_register_irq_handler " + retval = hpet_register_irq_handler(cmos_interrupt); + if (retval) { + dev_warn(dev, "hpet_register_irq_handler " " failed in rtc_init()."); goto cleanup1; } @@ -776,7 +779,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) rtc_cmos_int_handler = cmos_interrupt; retval = request_irq(rtc_irq, rtc_cmos_int_handler, - IRQF_DISABLED, dev_name(&cmos_rtc.rtc->dev), + 0, dev_name(&cmos_rtc.rtc->dev), cmos_rtc.rtc); if (retval < 0) { dev_dbg(dev, "IRQ %d is already in use\n", rtc_irq); @@ -793,8 +796,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) goto cleanup2; } - pr_info("%s: %s%s, %zd bytes nvram%s\n", - dev_name(&cmos_rtc.rtc->dev), + dev_info(dev, "%s%s, %zd bytes nvram%s\n", !is_valid_irq(rtc_irq) ? "no alarms" : cmos_rtc.mon_alrm ? "alarms up to one year" : cmos_rtc.day_alrm ? "alarms up to one month" : @@ -812,14 +814,18 @@ cleanup1: cmos_rtc.dev = NULL; rtc_device_unregister(cmos_rtc.rtc); cleanup0: - release_region(ports->start, ports->end + 1 - ports->start); + if (RTC_IOMAPPED) + release_region(ports->start, resource_size(ports)); + else + release_mem_region(ports->start, resource_size(ports)); return retval; } -static void cmos_do_shutdown(void) +static void cmos_do_shutdown(int rtc_irq) { spin_lock_irq(&rtc_lock); - cmos_irq_disable(&cmos_rtc, RTC_IRQMASK); + if (is_valid_irq(rtc_irq)) + cmos_irq_disable(&cmos_rtc, RTC_IRQMASK); spin_unlock_irq(&rtc_lock); } @@ -828,7 +834,7 @@ static void __exit cmos_do_remove(struct device *dev) struct cmos_rtc *cmos = dev_get_drvdata(dev); struct resource *ports; - cmos_do_shutdown(); + cmos_do_shutdown(cmos->irq); sysfs_remove_bin_file(&dev->kobj, &nvram); @@ -841,16 +847,18 @@ static void __exit cmos_do_remove(struct device *dev) cmos->rtc = NULL; ports = cmos->iomem; - release_region(ports->start, ports->end + 1 - ports->start); + if (RTC_IOMAPPED) + release_region(ports->start, resource_size(ports)); + else + release_mem_region(ports->start, resource_size(ports)); cmos->iomem = NULL; cmos->dev = NULL; - dev_set_drvdata(dev, NULL); } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP -static int cmos_suspend(struct device *dev, pm_message_t mesg) +static int cmos_suspend(struct device *dev) { struct cmos_rtc *cmos = dev_get_drvdata(dev); unsigned char tmp; @@ -867,9 +875,8 @@ static int cmos_suspend(struct device *dev, pm_message_t mesg) mask = RTC_IRQMASK; tmp &= ~mask; CMOS_WRITE(tmp, RTC_CONTROL); + hpet_mask_rtc_irq_bit(mask); - /* shut down hpet emulation - we don't need it for alarm */ - hpet_mask_rtc_irq_bit(RTC_PIE|RTC_AIE|RTC_UIE); cmos_checkintr(cmos, tmp); } spin_unlock_irq(&rtc_lock); @@ -882,8 +889,7 @@ static int cmos_suspend(struct device *dev, pm_message_t mesg) enable_irq_wake(cmos->irq); } - pr_debug("%s: suspend%s, ctrl %02x\n", - dev_name(&cmos_rtc.rtc->dev), + dev_dbg(dev, "suspend%s, ctrl %02x\n", (tmp & RTC_AIE) ? ", alarm may wake" : "", tmp); @@ -898,27 +904,32 @@ static int cmos_suspend(struct device *dev, pm_message_t mesg) */ static inline int cmos_poweroff(struct device *dev) { - return cmos_suspend(dev, PMSG_HIBERNATE); + return cmos_suspend(dev); } static int cmos_resume(struct device *dev) { struct cmos_rtc *cmos = dev_get_drvdata(dev); - unsigned char tmp = cmos->suspend_ctrl; + unsigned char tmp; + if (cmos->enabled_wake) { + if (cmos->wake_off) + cmos->wake_off(dev); + else + disable_irq_wake(cmos->irq); + cmos->enabled_wake = 0; + } + + spin_lock_irq(&rtc_lock); + tmp = cmos->suspend_ctrl; + cmos->suspend_ctrl = 0; /* re-enable any irqs previously active */ if (tmp & RTC_IRQMASK) { unsigned char mask; - if (cmos->enabled_wake) { - if (cmos->wake_off) - cmos->wake_off(dev); - else - disable_irq_wake(cmos->irq); - cmos->enabled_wake = 0; - } + if (device_may_wakeup(dev)) + hpet_rtc_timer_init(); - spin_lock_irq(&rtc_lock); do { CMOS_WRITE(tmp, RTC_CONTROL); hpet_set_rtc_irq_bit(tmp & RTC_IRQMASK); @@ -935,19 +946,15 @@ static int cmos_resume(struct device *dev) tmp &= ~RTC_AIE; hpet_mask_rtc_irq_bit(RTC_AIE); } while (mask & RTC_AIE); - spin_unlock_irq(&rtc_lock); } + spin_unlock_irq(&rtc_lock); - pr_debug("%s: resume, ctrl %02x\n", - dev_name(&cmos_rtc.rtc->dev), - tmp); + dev_dbg(dev, "resume, ctrl %02x\n", tmp); return 0; } #else -#define cmos_suspend NULL -#define cmos_resume NULL static inline int cmos_poweroff(struct device *dev) { @@ -956,6 +963,8 @@ static inline int cmos_poweroff(struct device *dev) #endif +static SIMPLE_DEV_PM_OPS(cmos_pm_ops, cmos_suspend, cmos_resume); + /*----------------------------------------------------------------*/ /* On non-x86 systems, a "CMOS" RTC lives most naturally on platform_bus. @@ -972,14 +981,17 @@ static inline int cmos_poweroff(struct device *dev) static u32 rtc_handler(void *context) { + struct device *dev = context; + + pm_wakeup_event(dev, 0); acpi_clear_event(ACPI_EVENT_RTC); acpi_disable_event(ACPI_EVENT_RTC, 0); return ACPI_INTERRUPT_HANDLED; } -static inline void rtc_wake_setup(void) +static inline void rtc_wake_setup(struct device *dev) { - acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); + acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, dev); /* * After the RTC handler is installed, the Fixed_RTC event should * be disabled. Only when the RTC alarm is set will it be enabled. @@ -1006,13 +1018,12 @@ static void rtc_wake_off(struct device *dev) */ static struct cmos_rtc_board_info acpi_rtc_info; -static void __devinit -cmos_wake_setup(struct device *dev) +static void cmos_wake_setup(struct device *dev) { if (acpi_disabled) return; - rtc_wake_setup(); + rtc_wake_setup(dev); acpi_rtc_info.wake_on = rtc_wake_on; acpi_rtc_info.wake_off = rtc_wake_off; @@ -1039,8 +1050,7 @@ cmos_wake_setup(struct device *dev) #else -static void __devinit -cmos_wake_setup(struct device *dev) +static void cmos_wake_setup(struct device *dev) { } @@ -1050,12 +1060,11 @@ cmos_wake_setup(struct device *dev) #include <linux/pnp.h> -static int __devinit -cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id) +static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id) { cmos_wake_setup(&pnp->dev); - if (pnp_port_start(pnp,0) == 0x70 && !pnp_irq_valid(pnp,0)) + if (pnp_port_start(pnp, 0) == 0x70 && !pnp_irq_valid(pnp, 0)) /* Some machines contain a PNP entry for the RTC, but * don't define the IRQ. It should always be safe to * hardcode it in these cases @@ -1073,29 +1082,15 @@ static void __exit cmos_pnp_remove(struct pnp_dev *pnp) cmos_do_remove(&pnp->dev); } -#ifdef CONFIG_PM - -static int cmos_pnp_suspend(struct pnp_dev *pnp, pm_message_t mesg) -{ - return cmos_suspend(&pnp->dev, mesg); -} - -static int cmos_pnp_resume(struct pnp_dev *pnp) -{ - return cmos_resume(&pnp->dev); -} - -#else -#define cmos_pnp_suspend NULL -#define cmos_pnp_resume NULL -#endif - static void cmos_pnp_shutdown(struct pnp_dev *pnp) { - if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(&pnp->dev)) + struct device *dev = &pnp->dev; + struct cmos_rtc *cmos = dev_get_drvdata(dev); + + if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev)) return; - cmos_do_shutdown(); + cmos_do_shutdown(cmos->irq); } static const struct pnp_device_id rtc_ids[] = { @@ -1115,12 +1110,53 @@ static struct pnp_driver cmos_pnp_driver = { /* flag ensures resume() gets called, and stops syslog spam */ .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, - .suspend = cmos_pnp_suspend, - .resume = cmos_pnp_resume, + .driver = { + .pm = &cmos_pm_ops, + }, }; #endif /* CONFIG_PNP */ +#ifdef CONFIG_OF +static const struct of_device_id of_cmos_match[] = { + { + .compatible = "motorola,mc146818", + }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_cmos_match); + +static __init void cmos_of_init(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct rtc_time time; + int ret; + const __be32 *val; + + if (!node) + return; + + val = of_get_property(node, "ctrl-reg", NULL); + if (val) + CMOS_WRITE(be32_to_cpup(val), RTC_CONTROL); + + val = of_get_property(node, "freq-reg", NULL); + if (val) + CMOS_WRITE(be32_to_cpup(val), RTC_FREQ_SELECT); + + get_rtc_time(&time); + ret = rtc_valid_tm(&time); + if (ret) { + struct rtc_time def_time = { + .tm_year = 1, + .tm_mday = 1, + }; + set_rtc_time(&def_time); + } +} +#else +static inline void cmos_of_init(struct platform_device *pdev) {} +#endif /*----------------------------------------------------------------*/ /* Platform setup should have set up an RTC device, when PNP is @@ -1129,10 +1165,21 @@ static struct pnp_driver cmos_pnp_driver = { static int __init cmos_platform_probe(struct platform_device *pdev) { + struct resource *resource; + int irq; + + cmos_of_init(pdev); cmos_wake_setup(&pdev->dev); - return cmos_do_probe(&pdev->dev, - platform_get_resource(pdev, IORESOURCE_IO, 0), - platform_get_irq(pdev, 0)); + + if (RTC_IOMAPPED) + resource = platform_get_resource(pdev, IORESOURCE_IO, 0); + else + resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_irq(pdev, 0); + if (irq < 0) + irq = -1; + + return cmos_do_probe(&pdev->dev, resource, irq); } static int __exit cmos_platform_remove(struct platform_device *pdev) @@ -1143,10 +1190,13 @@ static int __exit cmos_platform_remove(struct platform_device *pdev) static void cmos_platform_shutdown(struct platform_device *pdev) { - if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(&pdev->dev)) + struct device *dev = &pdev->dev; + struct cmos_rtc *cmos = dev_get_drvdata(dev); + + if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev)) return; - cmos_do_shutdown(); + cmos_do_shutdown(cmos->irq); } /* work with hotplug and coldplug */ @@ -1156,9 +1206,11 @@ static struct platform_driver cmos_platform_driver = { .remove = __exit_p(cmos_platform_remove), .shutdown = cmos_platform_shutdown, .driver = { - .name = (char *) driver_name, - .suspend = cmos_suspend, - .resume = cmos_resume, + .name = driver_name, +#ifdef CONFIG_PM + .pm = &cmos_pm_ops, +#endif + .of_match_table = of_match_ptr(of_cmos_match), } }; @@ -1184,6 +1236,8 @@ static int __init cmos_init(void) platform_driver_registered = true; } + dmi_check_system(rtc_quirks); + if (retval == 0) return 0; diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c index 316f484999b..869cae27379 100644 --- a/drivers/rtc/rtc-coh901331.c +++ b/drivers/rtc/rtc-coh901331.c @@ -43,11 +43,9 @@ struct coh901331_port { struct rtc_device *rtc; struct clk *clk; - u32 phybase; - u32 physize; void __iomem *virtbase; int irq; -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP u32 irqmaskstore; #endif }; @@ -152,17 +150,10 @@ static struct rtc_class_ops coh901331_ops = { static int __exit coh901331_remove(struct platform_device *pdev) { - struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev); - - if (rtap) { - free_irq(rtap->irq, rtap); - rtc_device_unregister(rtap->rtc); - clk_put(rtap->clk); - iounmap(rtap->virtbase); - release_mem_region(rtap->phybase, rtap->physize); - platform_set_drvdata(pdev, NULL); - kfree(rtap); - } + struct coh901331_port *rtap = platform_get_drvdata(pdev); + + if (rtap) + clk_unprepare(rtap->clk); return 0; } @@ -174,90 +165,62 @@ static int __init coh901331_probe(struct platform_device *pdev) struct coh901331_port *rtap; struct resource *res; - rtap = kzalloc(sizeof(struct coh901331_port), GFP_KERNEL); + rtap = devm_kzalloc(&pdev->dev, + sizeof(struct coh901331_port), GFP_KERNEL); if (!rtap) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENOENT; - goto out_no_resource; - } - rtap->phybase = res->start; - rtap->physize = resource_size(res); - - if (request_mem_region(rtap->phybase, rtap->physize, - "rtc-coh901331") == NULL) { - ret = -EBUSY; - goto out_no_memregion; - } - - rtap->virtbase = ioremap(rtap->phybase, rtap->physize); - if (!rtap->virtbase) { - ret = -ENOMEM; - goto out_no_remap; - } + rtap->virtbase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rtap->virtbase)) + return PTR_ERR(rtap->virtbase); rtap->irq = platform_get_irq(pdev, 0); - if (request_irq(rtap->irq, coh901331_interrupt, IRQF_DISABLED, - "RTC COH 901 331 Alarm", rtap)) { - ret = -EIO; - goto out_no_irq; - } + if (devm_request_irq(&pdev->dev, rtap->irq, coh901331_interrupt, 0, + "RTC COH 901 331 Alarm", rtap)) + return -EIO; - rtap->clk = clk_get(&pdev->dev, NULL); + rtap->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(rtap->clk)) { ret = PTR_ERR(rtap->clk); dev_err(&pdev->dev, "could not get clock\n"); - goto out_no_clk; + return ret; } /* We enable/disable the clock only to assure it works */ - ret = clk_enable(rtap->clk); + ret = clk_prepare_enable(rtap->clk); if (ret) { dev_err(&pdev->dev, "could not enable clock\n"); - goto out_no_clk_enable; + return ret; } clk_disable(rtap->clk); - rtap->rtc = rtc_device_register("coh901331", &pdev->dev, &coh901331_ops, - THIS_MODULE); + platform_set_drvdata(pdev, rtap); + rtap->rtc = devm_rtc_device_register(&pdev->dev, "coh901331", + &coh901331_ops, THIS_MODULE); if (IS_ERR(rtap->rtc)) { ret = PTR_ERR(rtap->rtc); goto out_no_rtc; } - platform_set_drvdata(pdev, rtap); - return 0; out_no_rtc: - out_no_clk_enable: - clk_put(rtap->clk); - out_no_clk: - free_irq(rtap->irq, rtap); - out_no_irq: - iounmap(rtap->virtbase); - out_no_remap: - platform_set_drvdata(pdev, NULL); - out_no_memregion: - release_mem_region(rtap->phybase, SZ_4K); - out_no_resource: - kfree(rtap); + clk_unprepare(rtap->clk); return ret; } -#ifdef CONFIG_PM -static int coh901331_suspend(struct platform_device *pdev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int coh901331_suspend(struct device *dev) { - struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev); + struct coh901331_port *rtap = dev_get_drvdata(dev); /* * If this RTC alarm will be used for waking the system up, * don't disable it of course. Else we just disable the alarm * and await suspension. */ - if (device_may_wakeup(&pdev->dev)) { + if (device_may_wakeup(dev)) { enable_irq_wake(rtap->irq); } else { clk_enable(rtap->clk); @@ -265,14 +228,16 @@ static int coh901331_suspend(struct platform_device *pdev, pm_message_t state) writel(0, rtap->virtbase + COH901331_IRQ_MASK); clk_disable(rtap->clk); } + clk_unprepare(rtap->clk); return 0; } -static int coh901331_resume(struct platform_device *pdev) +static int coh901331_resume(struct device *dev) { - struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev); + struct coh901331_port *rtap = dev_get_drvdata(dev); - if (device_may_wakeup(&pdev->dev)) { + clk_prepare(rtap->clk); + if (device_may_wakeup(dev)) { disable_irq_wake(rtap->irq); } else { clk_enable(rtap->clk); @@ -281,43 +246,36 @@ static int coh901331_resume(struct platform_device *pdev) } return 0; } -#else -#define coh901331_suspend NULL -#define coh901331_resume NULL #endif +static SIMPLE_DEV_PM_OPS(coh901331_pm_ops, coh901331_suspend, coh901331_resume); + static void coh901331_shutdown(struct platform_device *pdev) { - struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev); + struct coh901331_port *rtap = platform_get_drvdata(pdev); clk_enable(rtap->clk); writel(0, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable(rtap->clk); + clk_disable_unprepare(rtap->clk); } +static const struct of_device_id coh901331_dt_match[] = { + { .compatible = "stericsson,coh901331" }, + {}, +}; + static struct platform_driver coh901331_driver = { .driver = { .name = "rtc-coh901331", .owner = THIS_MODULE, + .pm = &coh901331_pm_ops, + .of_match_table = coh901331_dt_match, }, .remove = __exit_p(coh901331_remove), - .suspend = coh901331_suspend, - .resume = coh901331_resume, .shutdown = coh901331_shutdown, }; -static int __init coh901331_init(void) -{ - return platform_driver_probe(&coh901331_driver, coh901331_probe); -} - -static void __exit coh901331_exit(void) -{ - platform_driver_unregister(&coh901331_driver); -} - -module_init(coh901331_init); -module_exit(coh901331_exit); +module_platform_driver_probe(coh901331_driver, coh901331_probe); MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); MODULE_DESCRIPTION("ST-Ericsson AB COH 901 331 RTC Driver"); diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c new file mode 100644 index 00000000000..e5c9486cf45 --- /dev/null +++ b/drivers/rtc/rtc-da9052.c @@ -0,0 +1,277 @@ +/* + * Real time clock driver for DA9052 + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: Dajun Dajun Chen <dajun.chen@diasemi.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/err.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> + +#define rtc_err(rtc, fmt, ...) \ + dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__) + +struct da9052_rtc { + struct rtc_device *rtc; + struct da9052 *da9052; +}; + +static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable) +{ + int ret; + if (enable) { + ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG, + DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON, + DA9052_ALARM_Y_ALARM_ON); + if (ret != 0) + rtc_err(rtc, "Failed to enable ALM: %d\n", ret); + } else { + ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG, + DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON, 0); + if (ret != 0) + rtc_err(rtc, "Write error: %d\n", ret); + } + return ret; +} + +static irqreturn_t da9052_rtc_irq(int irq, void *data) +{ + struct da9052_rtc *rtc = data; + + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static int da9052_read_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm) +{ + int ret; + uint8_t v[5]; + + ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, v); + if (ret != 0) { + rtc_err(rtc, "Failed to group read ALM: %d\n", ret); + return ret; + } + + rtc_tm->tm_year = (v[4] & DA9052_RTC_YEAR) + 100; + rtc_tm->tm_mon = (v[3] & DA9052_RTC_MONTH) - 1; + rtc_tm->tm_mday = v[2] & DA9052_RTC_DAY; + rtc_tm->tm_hour = v[1] & DA9052_RTC_HOUR; + rtc_tm->tm_min = v[0] & DA9052_RTC_MIN; + + ret = rtc_valid_tm(rtc_tm); + return ret; +} + +static int da9052_set_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm) +{ + struct da9052 *da9052 = rtc->da9052; + unsigned long alm_time; + int ret; + uint8_t v[3]; + + ret = rtc_tm_to_time(rtc_tm, &alm_time); + if (ret != 0) + return ret; + + if (rtc_tm->tm_sec > 0) { + alm_time += 60 - rtc_tm->tm_sec; + rtc_time_to_tm(alm_time, rtc_tm); + } + BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */ + + rtc_tm->tm_year -= 100; + rtc_tm->tm_mon += 1; + + ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG, + DA9052_RTC_MIN, rtc_tm->tm_min); + if (ret != 0) { + rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret); + return ret; + } + + v[0] = rtc_tm->tm_hour; + v[1] = rtc_tm->tm_mday; + v[2] = rtc_tm->tm_mon; + + ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v); + if (ret < 0) + return ret; + + ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, + DA9052_RTC_YEAR, rtc_tm->tm_year); + if (ret != 0) + rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret); + + return ret; +} + +static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc) +{ + int ret; + + ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG); + if (ret < 0) { + rtc_err(rtc, "Failed to read ALM: %d\n", ret); + return ret; + } + + return !!(ret&DA9052_ALARM_Y_ALARM_ON); +} + +static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm) +{ + struct da9052_rtc *rtc = dev_get_drvdata(dev); + uint8_t v[6]; + int ret; + + ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, v); + if (ret < 0) { + rtc_err(rtc, "Failed to read RTC time : %d\n", ret); + return ret; + } + + rtc_tm->tm_year = (v[5] & DA9052_RTC_YEAR) + 100; + rtc_tm->tm_mon = (v[4] & DA9052_RTC_MONTH) - 1; + rtc_tm->tm_mday = v[3] & DA9052_RTC_DAY; + rtc_tm->tm_hour = v[2] & DA9052_RTC_HOUR; + rtc_tm->tm_min = v[1] & DA9052_RTC_MIN; + rtc_tm->tm_sec = v[0] & DA9052_RTC_SEC; + + ret = rtc_valid_tm(rtc_tm); + return ret; +} + +static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct da9052_rtc *rtc; + uint8_t v[6]; + int ret; + + rtc = dev_get_drvdata(dev); + + v[0] = tm->tm_sec; + v[1] = tm->tm_min; + v[2] = tm->tm_hour; + v[3] = tm->tm_mday; + v[4] = tm->tm_mon + 1; + v[5] = tm->tm_year - 100; + + ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v); + if (ret < 0) + rtc_err(rtc, "failed to set RTC time: %d\n", ret); + return ret; +} + +static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + int ret; + struct rtc_time *tm = &alrm->time; + struct da9052_rtc *rtc = dev_get_drvdata(dev); + + ret = da9052_read_alarm(rtc, tm); + if (ret < 0) { + rtc_err(rtc, "failed to read RTC alarm: %d\n", ret); + return ret; + } + + alrm->enabled = da9052_rtc_get_alarm_status(rtc); + return 0; +} + +static int da9052_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + int ret; + struct rtc_time *tm = &alrm->time; + struct da9052_rtc *rtc = dev_get_drvdata(dev); + + ret = da9052_rtc_enable_alarm(rtc, 0); + if (ret < 0) + return ret; + + ret = da9052_set_alarm(rtc, tm); + if (ret < 0) + return ret; + + ret = da9052_rtc_enable_alarm(rtc, 1); + return ret; +} + +static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct da9052_rtc *rtc = dev_get_drvdata(dev); + + return da9052_rtc_enable_alarm(rtc, enabled); +} + +static const struct rtc_class_ops da9052_rtc_ops = { + .read_time = da9052_rtc_read_time, + .set_time = da9052_rtc_set_time, + .read_alarm = da9052_rtc_read_alarm, + .set_alarm = da9052_rtc_set_alarm, + .alarm_irq_enable = da9052_rtc_alarm_irq_enable, +}; + +static int da9052_rtc_probe(struct platform_device *pdev) +{ + struct da9052_rtc *rtc; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->da9052 = dev_get_drvdata(pdev->dev.parent); + platform_set_drvdata(pdev, rtc); + + ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE); + if (ret < 0) { + rtc_err(rtc, + "Failed to setup RTC battery charging: %d\n", ret); + return ret; + } + + ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG, + DA9052_ALARM_Y_TICK_ON, 0); + if (ret != 0) + rtc_err(rtc, "Failed to disable TICKS: %d\n", ret); + + ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM", + da9052_rtc_irq, rtc); + if (ret != 0) { + rtc_err(rtc, "irq registration failed: %d\n", ret); + return ret; + } + + rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &da9052_rtc_ops, THIS_MODULE); + return PTR_ERR_OR_ZERO(rtc->rtc); +} + +static struct platform_driver da9052_rtc_driver = { + .probe = da9052_rtc_probe, + .driver = { + .name = "da9052-rtc", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9052_rtc_driver); + +MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>"); +MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-rtc"); diff --git a/drivers/rtc/rtc-da9055.c b/drivers/rtc/rtc-da9055.c new file mode 100644 index 00000000000..a825491331c --- /dev/null +++ b/drivers/rtc/rtc-da9055.c @@ -0,0 +1,404 @@ +/* + * Real time clock driver for DA9055 + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: Dajun Dajun Chen <dajun.chen@diasemi.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> + +#include <linux/mfd/da9055/core.h> +#include <linux/mfd/da9055/reg.h> +#include <linux/mfd/da9055/pdata.h> + +struct da9055_rtc { + struct rtc_device *rtc; + struct da9055 *da9055; + int alarm_enable; +}; + +static int da9055_rtc_enable_alarm(struct da9055_rtc *rtc, bool enable) +{ + int ret; + if (enable) { + ret = da9055_reg_update(rtc->da9055, DA9055_REG_ALARM_Y, + DA9055_RTC_ALM_EN, + DA9055_RTC_ALM_EN); + if (ret != 0) + dev_err(rtc->da9055->dev, "Failed to enable ALM: %d\n", + ret); + rtc->alarm_enable = 1; + } else { + ret = da9055_reg_update(rtc->da9055, DA9055_REG_ALARM_Y, + DA9055_RTC_ALM_EN, 0); + if (ret != 0) + dev_err(rtc->da9055->dev, + "Failed to disable ALM: %d\n", ret); + rtc->alarm_enable = 0; + } + return ret; +} + +static irqreturn_t da9055_rtc_alm_irq(int irq, void *data) +{ + struct da9055_rtc *rtc = data; + + da9055_rtc_enable_alarm(rtc, 0); + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static int da9055_read_alarm(struct da9055 *da9055, struct rtc_time *rtc_tm) +{ + int ret; + uint8_t v[5]; + + ret = da9055_group_read(da9055, DA9055_REG_ALARM_MI, 5, v); + if (ret != 0) { + dev_err(da9055->dev, "Failed to group read ALM: %d\n", ret); + return ret; + } + + rtc_tm->tm_year = (v[4] & DA9055_RTC_ALM_YEAR) + 100; + rtc_tm->tm_mon = (v[3] & DA9055_RTC_ALM_MONTH) - 1; + rtc_tm->tm_mday = v[2] & DA9055_RTC_ALM_DAY; + rtc_tm->tm_hour = v[1] & DA9055_RTC_ALM_HOUR; + rtc_tm->tm_min = v[0] & DA9055_RTC_ALM_MIN; + + return rtc_valid_tm(rtc_tm); +} + +static int da9055_set_alarm(struct da9055 *da9055, struct rtc_time *rtc_tm) +{ + int ret; + uint8_t v[2]; + + rtc_tm->tm_year -= 100; + rtc_tm->tm_mon += 1; + + ret = da9055_reg_update(da9055, DA9055_REG_ALARM_MI, + DA9055_RTC_ALM_MIN, rtc_tm->tm_min); + if (ret != 0) { + dev_err(da9055->dev, "Failed to write ALRM MIN: %d\n", ret); + return ret; + } + + v[0] = rtc_tm->tm_hour; + v[1] = rtc_tm->tm_mday; + + ret = da9055_group_write(da9055, DA9055_REG_ALARM_H, 2, v); + if (ret < 0) + return ret; + + ret = da9055_reg_update(da9055, DA9055_REG_ALARM_MO, + DA9055_RTC_ALM_MONTH, rtc_tm->tm_mon); + if (ret < 0) + dev_err(da9055->dev, "Failed to write ALM Month:%d\n", ret); + + ret = da9055_reg_update(da9055, DA9055_REG_ALARM_Y, + DA9055_RTC_ALM_YEAR, rtc_tm->tm_year); + if (ret < 0) + dev_err(da9055->dev, "Failed to write ALM Year:%d\n", ret); + + return ret; +} + +static int da9055_rtc_get_alarm_status(struct da9055 *da9055) +{ + int ret; + + ret = da9055_reg_read(da9055, DA9055_REG_ALARM_Y); + if (ret < 0) { + dev_err(da9055->dev, "Failed to read ALM: %d\n", ret); + return ret; + } + ret &= DA9055_RTC_ALM_EN; + return (ret > 0) ? 1 : 0; +} + +static int da9055_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm) +{ + struct da9055_rtc *rtc = dev_get_drvdata(dev); + uint8_t v[6]; + int ret; + + ret = da9055_reg_read(rtc->da9055, DA9055_REG_COUNT_S); + if (ret < 0) + return ret; + + /* + * Registers are only valid when RTC_READ + * status bit is asserted + */ + if (!(ret & DA9055_RTC_READ)) + return -EBUSY; + + ret = da9055_group_read(rtc->da9055, DA9055_REG_COUNT_S, 6, v); + if (ret < 0) { + dev_err(rtc->da9055->dev, "Failed to read RTC time : %d\n", + ret); + return ret; + } + + rtc_tm->tm_year = (v[5] & DA9055_RTC_YEAR) + 100; + rtc_tm->tm_mon = (v[4] & DA9055_RTC_MONTH) - 1; + rtc_tm->tm_mday = v[3] & DA9055_RTC_DAY; + rtc_tm->tm_hour = v[2] & DA9055_RTC_HOUR; + rtc_tm->tm_min = v[1] & DA9055_RTC_MIN; + rtc_tm->tm_sec = v[0] & DA9055_RTC_SEC; + + return rtc_valid_tm(rtc_tm); +} + +static int da9055_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct da9055_rtc *rtc; + uint8_t v[6]; + + rtc = dev_get_drvdata(dev); + + v[0] = tm->tm_sec; + v[1] = tm->tm_min; + v[2] = tm->tm_hour; + v[3] = tm->tm_mday; + v[4] = tm->tm_mon + 1; + v[5] = tm->tm_year - 100; + + return da9055_group_write(rtc->da9055, DA9055_REG_COUNT_S, 6, v); +} + +static int da9055_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + int ret; + struct rtc_time *tm = &alrm->time; + struct da9055_rtc *rtc = dev_get_drvdata(dev); + + ret = da9055_read_alarm(rtc->da9055, tm); + + if (ret) + return ret; + + alrm->enabled = da9055_rtc_get_alarm_status(rtc->da9055); + + return 0; +} + +static int da9055_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + int ret; + struct rtc_time *tm = &alrm->time; + struct da9055_rtc *rtc = dev_get_drvdata(dev); + + ret = da9055_rtc_enable_alarm(rtc, 0); + if (ret < 0) + return ret; + + ret = da9055_set_alarm(rtc->da9055, tm); + if (ret) + return ret; + + ret = da9055_rtc_enable_alarm(rtc, 1); + + return ret; +} + +static int da9055_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct da9055_rtc *rtc = dev_get_drvdata(dev); + + return da9055_rtc_enable_alarm(rtc, enabled); +} + +static const struct rtc_class_ops da9055_rtc_ops = { + .read_time = da9055_rtc_read_time, + .set_time = da9055_rtc_set_time, + .read_alarm = da9055_rtc_read_alarm, + .set_alarm = da9055_rtc_set_alarm, + .alarm_irq_enable = da9055_rtc_alarm_irq_enable, +}; + +static int da9055_rtc_device_init(struct da9055 *da9055, + struct da9055_pdata *pdata) +{ + int ret; + + /* Enable RTC and the internal Crystal */ + ret = da9055_reg_update(da9055, DA9055_REG_CONTROL_B, + DA9055_RTC_EN, DA9055_RTC_EN); + if (ret < 0) + return ret; + ret = da9055_reg_update(da9055, DA9055_REG_EN_32K, + DA9055_CRYSTAL_EN, DA9055_CRYSTAL_EN); + if (ret < 0) + return ret; + + /* Enable RTC in Power Down mode */ + ret = da9055_reg_update(da9055, DA9055_REG_CONTROL_B, + DA9055_RTC_MODE_PD, DA9055_RTC_MODE_PD); + if (ret < 0) + return ret; + + /* Enable RTC in Reset mode */ + if (pdata && pdata->reset_enable) { + ret = da9055_reg_update(da9055, DA9055_REG_CONTROL_B, + DA9055_RTC_MODE_SD, + DA9055_RTC_MODE_SD << + DA9055_RTC_MODE_SD_SHIFT); + if (ret < 0) + return ret; + } + + /* Disable the RTC TICK ALM */ + ret = da9055_reg_update(da9055, DA9055_REG_ALARM_MO, + DA9055_RTC_TICK_WAKE_MASK, 0); + if (ret < 0) + return ret; + + return 0; +} + +static int da9055_rtc_probe(struct platform_device *pdev) +{ + struct da9055_rtc *rtc; + struct da9055_pdata *pdata = NULL; + int ret, alm_irq; + + rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9055_rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->da9055 = dev_get_drvdata(pdev->dev.parent); + pdata = dev_get_platdata(rtc->da9055->dev); + platform_set_drvdata(pdev, rtc); + + ret = da9055_rtc_device_init(rtc->da9055, pdata); + if (ret < 0) + goto err_rtc; + + ret = da9055_reg_read(rtc->da9055, DA9055_REG_ALARM_Y); + if (ret < 0) + goto err_rtc; + + if (ret & DA9055_RTC_ALM_EN) + rtc->alarm_enable = 1; + + device_init_wakeup(&pdev->dev, 1); + + rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &da9055_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + ret = PTR_ERR(rtc->rtc); + goto err_rtc; + } + + alm_irq = platform_get_irq_byname(pdev, "ALM"); + if (alm_irq < 0) + return alm_irq; + + ret = devm_request_threaded_irq(&pdev->dev, alm_irq, NULL, + da9055_rtc_alm_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "ALM", rtc); + if (ret != 0) + dev_err(rtc->da9055->dev, "irq registration failed: %d\n", ret); + +err_rtc: + return ret; + +} + +#ifdef CONFIG_PM +/* Turn off the alarm if it should not be a wake source. */ +static int da9055_rtc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct da9055_rtc *rtc = dev_get_drvdata(&pdev->dev); + int ret; + + if (!device_may_wakeup(&pdev->dev)) { + /* Disable the ALM IRQ */ + ret = da9055_rtc_enable_alarm(rtc, 0); + if (ret < 0) + dev_err(&pdev->dev, "Failed to disable RTC ALM\n"); + } + + return 0; +} + +/* Enable the alarm if it should be enabled (in case it was disabled to + * prevent use as a wake source). + */ +static int da9055_rtc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct da9055_rtc *rtc = dev_get_drvdata(&pdev->dev); + int ret; + + if (!device_may_wakeup(&pdev->dev)) { + if (rtc->alarm_enable) { + ret = da9055_rtc_enable_alarm(rtc, 1); + if (ret < 0) + dev_err(&pdev->dev, + "Failed to restart RTC ALM\n"); + } + } + + return 0; +} + +/* Unconditionally disable the alarm */ +static int da9055_rtc_freeze(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct da9055_rtc *rtc = dev_get_drvdata(&pdev->dev); + int ret; + + ret = da9055_rtc_enable_alarm(rtc, 0); + if (ret < 0) + dev_err(&pdev->dev, "Failed to freeze RTC ALMs\n"); + + return 0; + +} +#else +#define da9055_rtc_suspend NULL +#define da9055_rtc_resume NULL +#define da9055_rtc_freeze NULL +#endif + +static const struct dev_pm_ops da9055_rtc_pm_ops = { + .suspend = da9055_rtc_suspend, + .resume = da9055_rtc_resume, + + .freeze = da9055_rtc_freeze, + .thaw = da9055_rtc_resume, + .restore = da9055_rtc_resume, + + .poweroff = da9055_rtc_suspend, +}; + +static struct platform_driver da9055_rtc_driver = { + .probe = da9055_rtc_probe, + .driver = { + .name = "da9055-rtc", + .owner = THIS_MODULE, + .pm = &da9055_rtc_pm_ops, + }, +}; + +module_platform_driver(da9055_rtc_driver); + +MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); +MODULE_DESCRIPTION("RTC driver for Dialog DA9055 PMIC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9055-rtc"); diff --git a/drivers/rtc/rtc-da9063.c b/drivers/rtc/rtc-da9063.c new file mode 100644 index 00000000000..595393098b0 --- /dev/null +++ b/drivers/rtc/rtc-da9063.c @@ -0,0 +1,333 @@ +/* rtc-da9063.c - Real time clock device driver for DA9063 + * Copyright (C) 2013-14 Dialog Semiconductor Ltd. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/rtc.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/regmap.h> +#include <linux/mfd/da9063/registers.h> +#include <linux/mfd/da9063/core.h> + +#define YEARS_TO_DA9063(year) ((year) - 100) +#define MONTHS_TO_DA9063(month) ((month) + 1) +#define YEARS_FROM_DA9063(year) ((year) + 100) +#define MONTHS_FROM_DA9063(month) ((month) - 1) + +#define RTC_DATA_LEN (DA9063_REG_COUNT_Y - DA9063_REG_COUNT_S + 1) +#define RTC_SEC 0 +#define RTC_MIN 1 +#define RTC_HOUR 2 +#define RTC_DAY 3 +#define RTC_MONTH 4 +#define RTC_YEAR 5 + +struct da9063_rtc { + struct rtc_device *rtc_dev; + struct da9063 *hw; + struct rtc_time alarm_time; + bool rtc_sync; +}; + +static void da9063_data_to_tm(u8 *data, struct rtc_time *tm) +{ + tm->tm_sec = data[RTC_SEC] & DA9063_COUNT_SEC_MASK; + tm->tm_min = data[RTC_MIN] & DA9063_COUNT_MIN_MASK; + tm->tm_hour = data[RTC_HOUR] & DA9063_COUNT_HOUR_MASK; + tm->tm_mday = data[RTC_DAY] & DA9063_COUNT_DAY_MASK; + tm->tm_mon = MONTHS_FROM_DA9063(data[RTC_MONTH] & + DA9063_COUNT_MONTH_MASK); + tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] & + DA9063_COUNT_YEAR_MASK); +} + +static void da9063_tm_to_data(struct rtc_time *tm, u8 *data) +{ + data[RTC_SEC] &= ~DA9063_COUNT_SEC_MASK; + data[RTC_SEC] |= tm->tm_sec & DA9063_COUNT_SEC_MASK; + + data[RTC_MIN] &= ~DA9063_COUNT_MIN_MASK; + data[RTC_MIN] |= tm->tm_min & DA9063_COUNT_MIN_MASK; + + data[RTC_HOUR] &= ~DA9063_COUNT_HOUR_MASK; + data[RTC_HOUR] |= tm->tm_hour & DA9063_COUNT_HOUR_MASK; + + data[RTC_DAY] &= ~DA9063_COUNT_DAY_MASK; + data[RTC_DAY] |= tm->tm_mday & DA9063_COUNT_DAY_MASK; + + data[RTC_MONTH] &= ~DA9063_COUNT_MONTH_MASK; + data[RTC_MONTH] |= MONTHS_TO_DA9063(tm->tm_mon) & + DA9063_COUNT_MONTH_MASK; + + data[RTC_YEAR] &= ~DA9063_COUNT_YEAR_MASK; + data[RTC_YEAR] |= YEARS_TO_DA9063(tm->tm_year) & + DA9063_COUNT_YEAR_MASK; +} + +static int da9063_rtc_stop_alarm(struct device *dev) +{ + struct da9063_rtc *rtc = dev_get_drvdata(dev); + + return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y, + DA9063_ALARM_ON, 0); +} + +static int da9063_rtc_start_alarm(struct device *dev) +{ + struct da9063_rtc *rtc = dev_get_drvdata(dev); + + return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y, + DA9063_ALARM_ON, DA9063_ALARM_ON); +} + +static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct da9063_rtc *rtc = dev_get_drvdata(dev); + unsigned long tm_secs; + unsigned long al_secs; + u8 data[RTC_DATA_LEN]; + int ret; + + ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_COUNT_S, + data, RTC_DATA_LEN); + if (ret < 0) { + dev_err(dev, "Failed to read RTC time data: %d\n", ret); + return ret; + } + + if (!(data[RTC_SEC] & DA9063_RTC_READ)) { + dev_dbg(dev, "RTC not yet ready to be read by the host\n"); + return -EINVAL; + } + + da9063_data_to_tm(data, tm); + + rtc_tm_to_time(tm, &tm_secs); + rtc_tm_to_time(&rtc->alarm_time, &al_secs); + + /* handle the rtc synchronisation delay */ + if (rtc->rtc_sync == true && al_secs - tm_secs == 1) + memcpy(tm, &rtc->alarm_time, sizeof(struct rtc_time)); + else + rtc->rtc_sync = false; + + return rtc_valid_tm(tm); +} + +static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct da9063_rtc *rtc = dev_get_drvdata(dev); + u8 data[RTC_DATA_LEN]; + int ret; + + da9063_tm_to_data(tm, data); + ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_COUNT_S, + data, RTC_DATA_LEN); + if (ret < 0) + dev_err(dev, "Failed to set RTC time data: %d\n", ret); + + return ret; +} + +static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct da9063_rtc *rtc = dev_get_drvdata(dev); + u8 data[RTC_DATA_LEN]; + int ret; + unsigned int val; + + ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_ALARM_S, + &data[RTC_SEC], RTC_DATA_LEN); + if (ret < 0) + return ret; + + da9063_data_to_tm(data, &alrm->time); + + alrm->enabled = !!(data[RTC_YEAR] & DA9063_ALARM_ON); + + ret = regmap_read(rtc->hw->regmap, DA9063_REG_EVENT_A, &val); + if (ret < 0) + return ret; + + if (val & (DA9063_E_ALARM)) + alrm->pending = 1; + else + alrm->pending = 0; + + return 0; +} + +static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct da9063_rtc *rtc = dev_get_drvdata(dev); + u8 data[RTC_DATA_LEN]; + int ret; + + da9063_tm_to_data(&alrm->time, data); + + ret = da9063_rtc_stop_alarm(dev); + if (ret < 0) { + dev_err(dev, "Failed to stop alarm: %d\n", ret); + return ret; + } + + ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_ALARM_S, + data, RTC_DATA_LEN); + if (ret < 0) { + dev_err(dev, "Failed to write alarm: %d\n", ret); + return ret; + } + + rtc->alarm_time = alrm->time; + + if (alrm->enabled) { + ret = da9063_rtc_start_alarm(dev); + if (ret < 0) { + dev_err(dev, "Failed to start alarm: %d\n", ret); + return ret; + } + } + + return ret; +} + +static int da9063_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + if (enabled) + return da9063_rtc_start_alarm(dev); + else + return da9063_rtc_stop_alarm(dev); +} + +static irqreturn_t da9063_alarm_event(int irq, void *data) +{ + struct da9063_rtc *rtc = data; + + regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y, + DA9063_ALARM_ON, 0); + + rtc->rtc_sync = true; + rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops da9063_rtc_ops = { + .read_time = da9063_rtc_read_time, + .set_time = da9063_rtc_set_time, + .read_alarm = da9063_rtc_read_alarm, + .set_alarm = da9063_rtc_set_alarm, + .alarm_irq_enable = da9063_rtc_alarm_irq_enable, +}; + +static int da9063_rtc_probe(struct platform_device *pdev) +{ + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); + struct da9063_rtc *rtc; + int irq_alarm; + u8 data[RTC_DATA_LEN]; + int ret; + + ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_E, + DA9063_RTC_EN, DA9063_RTC_EN); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to enable RTC\n"); + goto err; + } + + ret = regmap_update_bits(da9063->regmap, DA9063_REG_EN_32K, + DA9063_CRYSTAL, DA9063_CRYSTAL); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n"); + goto err; + } + + ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S, + DA9063_ALARM_STATUS_TICK | DA9063_ALARM_STATUS_ALARM, + 0); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to access RTC alarm register\n"); + goto err; + } + + ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S, + DA9063_ALARM_STATUS_ALARM, + DA9063_ALARM_STATUS_ALARM); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to access RTC alarm register\n"); + goto err; + } + + ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_Y, + DA9063_TICK_ON, 0); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to disable TICKs\n"); + goto err; + } + + ret = regmap_bulk_read(da9063->regmap, DA9063_REG_ALARM_S, + data, RTC_DATA_LEN); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n", + ret); + goto err; + } + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + platform_set_drvdata(pdev, rtc); + + irq_alarm = platform_get_irq_byname(pdev, "ALARM"); + ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL, + da9063_alarm_event, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "ALARM", rtc); + if (ret) { + dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n", + irq_alarm, ret); + goto err; + } + + rtc->hw = da9063; + rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC, + &da9063_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc_dev)) + return PTR_ERR(rtc->rtc_dev); + + da9063_data_to_tm(data, &rtc->alarm_time); + rtc->rtc_sync = false; +err: + return ret; +} + +static struct platform_driver da9063_rtc_driver = { + .probe = da9063_rtc_probe, + .driver = { + .name = DA9063_DRVNAME_RTC, + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9063_rtc_driver); + +MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>"); +MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC); diff --git a/drivers/rtc/rtc-davinci.c b/drivers/rtc/rtc-davinci.c index 34647fc1ee9..c0a3b59f65a 100644 --- a/drivers/rtc/rtc-davinci.c +++ b/drivers/rtc/rtc-davinci.c @@ -117,10 +117,8 @@ static DEFINE_SPINLOCK(davinci_rtc_lock); struct davinci_rtc { - struct rtc_device *rtc; + struct rtc_device *rtc; void __iomem *base; - resource_size_t pbase; - size_t base_size; int irq; }; @@ -231,10 +229,6 @@ davinci_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) case RTC_WIE_OFF: rtc_ctrl &= ~PRTCSS_RTC_CTRL_WEN; break; - case RTC_UIE_OFF: - case RTC_UIE_ON: - ret = -ENOTTY; - break; default: ret = -ENOIOCTLCMD; } @@ -473,55 +467,6 @@ static int davinci_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) return 0; } -static int davinci_rtc_irq_set_state(struct device *dev, int enabled) -{ - struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev); - unsigned long flags; - u8 rtc_ctrl; - - spin_lock_irqsave(&davinci_rtc_lock, flags); - - rtc_ctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL); - - if (enabled) { - while (rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL) - & PRTCSS_RTC_CTRL_WDTBUS) - cpu_relax(); - - rtc_ctrl |= PRTCSS_RTC_CTRL_TE; - rtcss_write(davinci_rtc, rtc_ctrl, PRTCSS_RTC_CTRL); - - rtcss_write(davinci_rtc, 0x0, PRTCSS_RTC_CLKC_CNT); - - rtc_ctrl |= PRTCSS_RTC_CTRL_TIEN | - PRTCSS_RTC_CTRL_TMMD | - PRTCSS_RTC_CTRL_TMRFLG; - } else - rtc_ctrl &= ~PRTCSS_RTC_CTRL_TIEN; - - rtcss_write(davinci_rtc, rtc_ctrl, PRTCSS_RTC_CTRL); - - spin_unlock_irqrestore(&davinci_rtc_lock, flags); - - return 0; -} - -static int davinci_rtc_irq_set_freq(struct device *dev, int freq) -{ - struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev); - unsigned long flags; - u16 tmr_counter = (0x8000 >> (ffs(freq) - 1)); - - spin_lock_irqsave(&davinci_rtc_lock, flags); - - rtcss_write(davinci_rtc, tmr_counter & 0xFF, PRTCSS_RTC_TMR0); - rtcss_write(davinci_rtc, (tmr_counter & 0xFF00) >> 8, PRTCSS_RTC_TMR1); - - spin_unlock_irqrestore(&davinci_rtc_lock, flags); - - return 0; -} - static struct rtc_class_ops davinci_rtc_ops = { .ioctl = davinci_rtc_ioctl, .read_time = davinci_rtc_read_time, @@ -529,62 +474,38 @@ static struct rtc_class_ops davinci_rtc_ops = { .alarm_irq_enable = davinci_rtc_alarm_irq_enable, .read_alarm = davinci_rtc_read_alarm, .set_alarm = davinci_rtc_set_alarm, - .irq_set_state = davinci_rtc_irq_set_state, - .irq_set_freq = davinci_rtc_irq_set_freq, }; static int __init davinci_rtc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct davinci_rtc *davinci_rtc; - struct resource *res, *mem; + struct resource *res; int ret = 0; - davinci_rtc = kzalloc(sizeof(struct davinci_rtc), GFP_KERNEL); - if (!davinci_rtc) { - dev_dbg(dev, "could not allocate memory for private data\n"); + davinci_rtc = devm_kzalloc(&pdev->dev, sizeof(struct davinci_rtc), GFP_KERNEL); + if (!davinci_rtc) return -ENOMEM; - } davinci_rtc->irq = platform_get_irq(pdev, 0); if (davinci_rtc->irq < 0) { dev_err(dev, "no RTC irq\n"); - ret = davinci_rtc->irq; - goto fail1; + return davinci_rtc->irq; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(dev, "no mem resource\n"); - ret = -EINVAL; - goto fail1; - } + davinci_rtc->base = devm_ioremap_resource(dev, res); + if (IS_ERR(davinci_rtc->base)) + return PTR_ERR(davinci_rtc->base); - davinci_rtc->pbase = res->start; - davinci_rtc->base_size = resource_size(res); - - mem = request_mem_region(davinci_rtc->pbase, davinci_rtc->base_size, - pdev->name); - if (!mem) { - dev_err(dev, "RTC registers at %08x are not free\n", - davinci_rtc->pbase); - ret = -EBUSY; - goto fail1; - } - - davinci_rtc->base = ioremap(davinci_rtc->pbase, davinci_rtc->base_size); - if (!davinci_rtc->base) { - dev_err(dev, "unable to ioremap MEM resource\n"); - ret = -ENOMEM; - goto fail2; - } + platform_set_drvdata(pdev, davinci_rtc); - davinci_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, + davinci_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &davinci_rtc_ops, THIS_MODULE); if (IS_ERR(davinci_rtc->rtc)) { - dev_err(dev, "unable to register RTC device, err %ld\n", - PTR_ERR(davinci_rtc->rtc)); - goto fail3; + dev_err(dev, "unable to register RTC device, err %d\n", + ret); + return PTR_ERR(davinci_rtc->rtc); } rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS, PRTCIF_INTFLG); @@ -594,11 +515,11 @@ static int __init davinci_rtc_probe(struct platform_device *pdev) rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CTRL); rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CCTRL); - ret = request_irq(davinci_rtc->irq, davinci_rtc_interrupt, - IRQF_DISABLED, "davinci_rtc", davinci_rtc); + ret = devm_request_irq(dev, davinci_rtc->irq, davinci_rtc_interrupt, + 0, "davinci_rtc", davinci_rtc); if (ret < 0) { dev_err(dev, "unable to register davinci RTC interrupt\n"); - goto fail4; + return ret; } /* Enable interrupts */ @@ -608,25 +529,12 @@ static int __init davinci_rtc_probe(struct platform_device *pdev) rtcss_write(davinci_rtc, PRTCSS_RTC_CCTRL_CAEN, PRTCSS_RTC_CCTRL); - platform_set_drvdata(pdev, davinci_rtc); - device_init_wakeup(&pdev->dev, 0); return 0; - -fail4: - rtc_device_unregister(davinci_rtc->rtc); -fail3: - iounmap(davinci_rtc->base); -fail2: - release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size); -fail1: - kfree(davinci_rtc); - - return ret; } -static int __devexit davinci_rtc_remove(struct platform_device *pdev) +static int __exit davinci_rtc_remove(struct platform_device *pdev) { struct davinci_rtc *davinci_rtc = platform_get_drvdata(pdev); @@ -634,40 +542,19 @@ static int __devexit davinci_rtc_remove(struct platform_device *pdev) rtcif_write(davinci_rtc, 0, PRTCIF_INTEN); - free_irq(davinci_rtc->irq, davinci_rtc); - - rtc_device_unregister(davinci_rtc->rtc); - - iounmap(davinci_rtc->base); - release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size); - - platform_set_drvdata(pdev, NULL); - - kfree(davinci_rtc); - return 0; } static struct platform_driver davinci_rtc_driver = { .probe = davinci_rtc_probe, - .remove = __devexit_p(davinci_rtc_remove), + .remove = __exit_p(davinci_rtc_remove), .driver = { .name = "rtc_davinci", .owner = THIS_MODULE, }, }; -static int __init rtc_init(void) -{ - return platform_driver_probe(&davinci_rtc_driver, davinci_rtc_probe); -} -module_init(rtc_init); - -static void __exit rtc_exit(void) -{ - platform_driver_unregister(&davinci_rtc_driver); -} -module_exit(rtc_exit); +module_platform_driver_probe(davinci_rtc_driver, davinci_rtc_probe); MODULE_AUTHOR("Miguel Aguilar <miguel.aguilar@ridgerun.com>"); MODULE_DESCRIPTION("Texas Instruments DaVinci PRTC Driver"); diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index 62227cd5241..d0493936925 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -11,6 +11,8 @@ * published by the Free Software Foundation. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/module.h> #include <linux/rtc.h> #include <linux/sched.h> @@ -76,7 +78,7 @@ static void rtc_uie_task(struct work_struct *work) } spin_unlock_irq(&rtc->irq_lock); if (num) - rtc_update_irq(rtc, num, RTC_UF | RTC_IRQF); + rtc_handle_legacy_irq(rtc, num, RTC_UF); } static void rtc_uie_timer(unsigned long data) { @@ -253,19 +255,7 @@ static long rtc_dev_ioctl(struct file *file, if (err) goto done; - /* try the driver's ioctl interface */ - if (ops->ioctl) { - err = ops->ioctl(rtc->dev.parent, cmd, arg); - if (err != -ENOIOCTLCMD) { - mutex_unlock(&rtc->ops_lock); - return err; - } - } - - /* if the driver does not provide the ioctl interface - * or if that particular ioctl was not implemented - * (-ENOIOCTLCMD), we will try to emulate here. - * + /* * Drivers *SHOULD NOT* provide ioctl implementations * for these requests. Instead, provide methods to * support the following code, so that the RTC's main @@ -391,25 +381,6 @@ static long rtc_dev_ioctl(struct file *file, err = put_user(rtc->irq_freq, (unsigned long __user *)uarg); break; -#if 0 - case RTC_EPOCH_SET: -#ifndef rtc_epoch - /* - * There were no RTC clocks before 1900. - */ - if (arg < 1900) { - err = -EINVAL; - break; - } - rtc_epoch = arg; - err = 0; -#endif - break; - - case RTC_EPOCH_READ: - err = put_user(rtc_epoch, (unsigned long __user *)uarg); - break; -#endif case RTC_WKALM_SET: mutex_unlock(&rtc->ops_lock); if (copy_from_user(&alarm, uarg, sizeof(alarm))) @@ -428,7 +399,13 @@ static long rtc_dev_ioctl(struct file *file, return err; default: - err = -ENOTTY; + /* Finally try the driver's ioctl interface */ + if (ops->ioctl) { + err = ops->ioctl(rtc->dev.parent, cmd, arg); + if (err == -ENOIOCTLCMD) + err = -ENOTTY; + } else + err = -ENOTTY; break; } @@ -487,7 +464,7 @@ void rtc_dev_prepare(struct rtc_device *rtc) return; if (rtc->id >= RTC_DEV_MAX) { - pr_debug("%s: too many RTC devices\n", rtc->name); + dev_dbg(&rtc->dev, "%s: too many RTC devices\n", rtc->name); return; } @@ -505,10 +482,10 @@ void rtc_dev_prepare(struct rtc_device *rtc) void rtc_dev_add_device(struct rtc_device *rtc) { if (cdev_add(&rtc->char_dev, rtc->dev.devt, 1)) - printk(KERN_WARNING "%s: failed to add char device %d:%d\n", + dev_warn(&rtc->dev, "%s: failed to add char device %d:%d\n", rtc->name, MAJOR(rtc_devt), rtc->id); else - pr_debug("%s: dev (%d:%d)\n", rtc->name, + dev_dbg(&rtc->dev, "%s: dev (%d:%d)\n", rtc->name, MAJOR(rtc_devt), rtc->id); } @@ -524,8 +501,7 @@ void __init rtc_dev_init(void) err = alloc_chrdev_region(&rtc_devt, 0, RTC_DEV_MAX, "rtc"); if (err < 0) - printk(KERN_ERR "%s: failed to allocate char dev region\n", - __FILE__); + pr_err("failed to allocate char dev region\n"); } void __exit rtc_dev_exit(void) diff --git a/drivers/rtc/rtc-dm355evm.c b/drivers/rtc/rtc-dm355evm.c index 58d4e18530d..1aca08394c4 100644 --- a/drivers/rtc/rtc-dm355evm.c +++ b/drivers/rtc/rtc-dm355evm.c @@ -14,6 +14,7 @@ #include <linux/platform_device.h> #include <linux/i2c/dm355evm_msp.h> +#include <linux/module.h> /* @@ -122,12 +123,12 @@ static struct rtc_class_ops dm355evm_rtc_ops = { /*----------------------------------------------------------------------*/ -static int __devinit dm355evm_rtc_probe(struct platform_device *pdev) +static int dm355evm_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; - rtc = rtc_device_register(pdev->name, - &pdev->dev, &dm355evm_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &dm355evm_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { dev_err(&pdev->dev, "can't register RTC device, err %ld\n", PTR_ERR(rtc)); @@ -138,38 +139,18 @@ static int __devinit dm355evm_rtc_probe(struct platform_device *pdev) return 0; } -static int __devexit dm355evm_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc = platform_get_drvdata(pdev); - - rtc_device_unregister(rtc); - platform_set_drvdata(pdev, NULL); - return 0; -} - /* * I2C is used to talk to the MSP430, but this platform device is * exposed by an MFD driver that manages I2C communications. */ static struct platform_driver rtc_dm355evm_driver = { .probe = dm355evm_rtc_probe, - .remove = __devexit_p(dm355evm_rtc_remove), .driver = { .owner = THIS_MODULE, .name = "rtc-dm355evm", }, }; -static int __init dm355evm_rtc_init(void) -{ - return platform_driver_register(&rtc_dm355evm_driver); -} -module_init(dm355evm_rtc_init); - -static void __exit dm355evm_rtc_exit(void) -{ - platform_driver_unregister(&rtc_dm355evm_driver); -} -module_exit(dm355evm_rtc_exit); +module_platform_driver(rtc_dm355evm_driver); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1216.c b/drivers/rtc/rtc-ds1216.c index 45cd8c9f5a3..9c04fd2bc20 100644 --- a/drivers/rtc/rtc-ds1216.c +++ b/drivers/rtc/rtc-ds1216.c @@ -30,8 +30,6 @@ struct ds1216_regs { struct ds1216_priv { struct rtc_device *rtc; void __iomem *ioaddr; - size_t size; - unsigned long baseaddr; }; static const u8 magic[] = { @@ -144,58 +142,29 @@ static int __init ds1216_rtc_probe(struct platform_device *pdev) { struct resource *res; struct ds1216_priv *priv; - int ret = 0; u8 dummy[8]; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; - priv = kzalloc(sizeof *priv, GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; platform_set_drvdata(pdev, priv); - priv->size = resource_size(res); - if (!request_mem_region(res->start, priv->size, pdev->name)) { - ret = -EBUSY; - goto out; - } - priv->baseaddr = res->start; - priv->ioaddr = ioremap(priv->baseaddr, priv->size); - if (!priv->ioaddr) { - ret = -ENOMEM; - goto out; - } - priv->rtc = rtc_device_register("ds1216", &pdev->dev, - &ds1216_rtc_ops, THIS_MODULE); - if (IS_ERR(priv->rtc)) { - ret = PTR_ERR(priv->rtc); - goto out; - } + priv->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->ioaddr)) + return PTR_ERR(priv->ioaddr); + + priv->rtc = devm_rtc_device_register(&pdev->dev, "ds1216", + &ds1216_rtc_ops, THIS_MODULE); + if (IS_ERR(priv->rtc)) + return PTR_ERR(priv->rtc); /* dummy read to get clock into a known state */ ds1216_read(priv->ioaddr, dummy); return 0; - -out: - if (priv->ioaddr) - iounmap(priv->ioaddr); - if (priv->baseaddr) - release_mem_region(priv->baseaddr, priv->size); - kfree(priv); - return ret; -} - -static int __exit ds1216_rtc_remove(struct platform_device *pdev) -{ - struct ds1216_priv *priv = platform_get_drvdata(pdev); - - rtc_device_unregister(priv->rtc); - iounmap(priv->ioaddr); - release_mem_region(priv->baseaddr, priv->size); - kfree(priv); - return 0; } static struct platform_driver ds1216_rtc_platform_driver = { @@ -203,24 +172,12 @@ static struct platform_driver ds1216_rtc_platform_driver = { .name = "rtc-ds1216", .owner = THIS_MODULE, }, - .remove = __exit_p(ds1216_rtc_remove), }; -static int __init ds1216_rtc_init(void) -{ - return platform_driver_probe(&ds1216_rtc_platform_driver, ds1216_rtc_probe); -} - -static void __exit ds1216_rtc_exit(void) -{ - platform_driver_unregister(&ds1216_rtc_platform_driver); -} +module_platform_driver_probe(ds1216_rtc_platform_driver, ds1216_rtc_probe); MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>"); MODULE_DESCRIPTION("DS1216 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); MODULE_ALIAS("platform:rtc-ds1216"); - -module_init(ds1216_rtc_init); -module_exit(ds1216_rtc_exit); diff --git a/drivers/rtc/rtc-ds1286.c b/drivers/rtc/rtc-ds1286.c index bf430f9091e..50e109b7825 100644 --- a/drivers/rtc/rtc-ds1286.c +++ b/drivers/rtc/rtc-ds1286.c @@ -25,8 +25,6 @@ struct ds1286_priv { struct rtc_device *rtc; u32 __iomem *rtcregs; - size_t size; - unsigned long baseaddr; spinlock_t lock; }; @@ -40,6 +38,26 @@ static inline void ds1286_rtc_write(struct ds1286_priv *priv, u8 data, int reg) __raw_writel(data, &priv->rtcregs[reg]); } + +static int ds1286_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct ds1286_priv *priv = dev_get_drvdata(dev); + unsigned long flags; + unsigned char val; + + /* Allow or mask alarm interrupts */ + spin_lock_irqsave(&priv->lock, flags); + val = ds1286_rtc_read(priv, RTC_CMD); + if (enabled) + val &= ~RTC_TDM; + else + val |= RTC_TDM; + ds1286_rtc_write(priv, val, RTC_CMD); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + #ifdef CONFIG_RTC_INTF_DEV static int ds1286_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) @@ -49,22 +67,6 @@ static int ds1286_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) unsigned char val; switch (cmd) { - case RTC_AIE_OFF: - /* Mask alarm int. enab. bit */ - spin_lock_irqsave(&priv->lock, flags); - val = ds1286_rtc_read(priv, RTC_CMD); - val |= RTC_TDM; - ds1286_rtc_write(priv, val, RTC_CMD); - spin_unlock_irqrestore(&priv->lock, flags); - break; - case RTC_AIE_ON: - /* Allow alarm interrupts. */ - spin_lock_irqsave(&priv->lock, flags); - val = ds1286_rtc_read(priv, RTC_CMD); - val &= ~RTC_TDM; - ds1286_rtc_write(priv, val, RTC_CMD); - spin_unlock_irqrestore(&priv->lock, flags); - break; case RTC_WIE_OFF: /* Mask watchdog int. enab. bit */ spin_lock_irqsave(&priv->lock, flags); @@ -266,7 +268,6 @@ static int ds1286_set_time(struct device *dev, struct rtc_time *tm) static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { struct ds1286_priv *priv = dev_get_drvdata(dev); - unsigned char cmd; unsigned long flags; /* @@ -277,7 +278,7 @@ static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm) alm->time.tm_min = ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x7f; alm->time.tm_hour = ds1286_rtc_read(priv, RTC_HOURS_ALARM) & 0x1f; alm->time.tm_wday = ds1286_rtc_read(priv, RTC_DAY_ALARM) & 0x07; - cmd = ds1286_rtc_read(priv, RTC_CMD); + ds1286_rtc_read(priv, RTC_CMD); spin_unlock_irqrestore(&priv->lock, flags); alm->time.tm_min = bcd2bin(alm->time.tm_min); @@ -316,69 +317,39 @@ static int ds1286_set_alarm(struct device *dev, struct rtc_wkalrm *alm) } static const struct rtc_class_ops ds1286_ops = { - .ioctl = ds1286_ioctl, - .proc = ds1286_proc, + .ioctl = ds1286_ioctl, + .proc = ds1286_proc, .read_time = ds1286_read_time, .set_time = ds1286_set_time, .read_alarm = ds1286_read_alarm, .set_alarm = ds1286_set_alarm, + .alarm_irq_enable = ds1286_alarm_irq_enable, }; -static int __devinit ds1286_probe(struct platform_device *pdev) +static int ds1286_probe(struct platform_device *pdev) { struct rtc_device *rtc; struct resource *res; struct ds1286_priv *priv; - int ret = 0; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; - priv = kzalloc(sizeof(struct ds1286_priv), GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(struct ds1286_priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->size = res->end - res->start + 1; - if (!request_mem_region(res->start, priv->size, pdev->name)) { - ret = -EBUSY; - goto out; - } - priv->baseaddr = res->start; - priv->rtcregs = ioremap(priv->baseaddr, priv->size); - if (!priv->rtcregs) { - ret = -ENOMEM; - goto out; - } + priv->rtcregs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->rtcregs)) + return PTR_ERR(priv->rtcregs); + spin_lock_init(&priv->lock); - rtc = rtc_device_register("ds1286", &pdev->dev, - &ds1286_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - ret = PTR_ERR(rtc); - goto out; - } - priv->rtc = rtc; platform_set_drvdata(pdev, priv); - return 0; - -out: - if (priv->rtc) - rtc_device_unregister(priv->rtc); - if (priv->rtcregs) - iounmap(priv->rtcregs); - if (priv->baseaddr) - release_mem_region(priv->baseaddr, priv->size); - kfree(priv); - return ret; -} - -static int __devexit ds1286_remove(struct platform_device *pdev) -{ - struct ds1286_priv *priv = platform_get_drvdata(pdev); - - rtc_device_unregister(priv->rtc); - iounmap(priv->rtcregs); - release_mem_region(priv->baseaddr, priv->size); - kfree(priv); + rtc = devm_rtc_device_register(&pdev->dev, "ds1286", &ds1286_ops, + THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + priv->rtc = rtc; return 0; } @@ -388,24 +359,12 @@ static struct platform_driver ds1286_platform_driver = { .owner = THIS_MODULE, }, .probe = ds1286_probe, - .remove = __devexit_p(ds1286_remove), }; -static int __init ds1286_init(void) -{ - return platform_driver_register(&ds1286_platform_driver); -} - -static void __exit ds1286_exit(void) -{ - platform_driver_unregister(&ds1286_platform_driver); -} +module_platform_driver(ds1286_platform_driver); MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>"); MODULE_DESCRIPTION("DS1286 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); MODULE_ALIAS("platform:rtc-ds1286"); - -module_init(ds1286_init); -module_exit(ds1286_exit); diff --git a/drivers/rtc/rtc-ds1302.c b/drivers/rtc/rtc-ds1302.c index f0d63892264..07e8d79b4a0 100644 --- a/drivers/rtc/rtc-ds1302.c +++ b/drivers/rtc/rtc-ds1302.c @@ -23,8 +23,12 @@ #define RTC_CMD_READ 0x81 /* Read command */ #define RTC_CMD_WRITE 0x80 /* Write command */ +#define RTC_CMD_WRITE_ENABLE 0x00 /* Write enable */ +#define RTC_CMD_WRITE_DISABLE 0x80 /* Write disable */ + #define RTC_ADDR_RAM0 0x20 /* Address of RAM0 */ #define RTC_ADDR_TCR 0x08 /* Address of trickle charge register */ +#define RTC_ADDR_CTRL 0x07 /* Address of control register */ #define RTC_ADDR_YEAR 0x06 /* Address of year register */ #define RTC_ADDR_DAY 0x05 /* Address of day of week register */ #define RTC_ADDR_MON 0x04 /* Address of month register */ @@ -161,6 +165,7 @@ static int ds1302_rtc_read_time(struct device *dev, struct rtc_time *tm) static int ds1302_rtc_set_time(struct device *dev, struct rtc_time *tm) { + ds1302_writebyte(RTC_ADDR_CTRL, RTC_CMD_WRITE_ENABLE); /* Stop RTC */ ds1302_writebyte(RTC_ADDR_SEC, ds1302_readbyte(RTC_ADDR_SEC) | 0x80); @@ -175,6 +180,8 @@ static int ds1302_rtc_set_time(struct device *dev, struct rtc_time *tm) /* Start RTC */ ds1302_writebyte(RTC_ADDR_SEC, ds1302_readbyte(RTC_ADDR_SEC) & ~0x80); + ds1302_writebyte(RTC_ADDR_CTRL, RTC_CMD_WRITE_DISABLE); + return 0; } @@ -224,7 +231,7 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev) return -ENODEV; } - rtc = rtc_device_register("ds1302", &pdev->dev, + rtc = devm_rtc_device_register(&pdev->dev, "ds1302", &ds1302_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -234,36 +241,14 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev) return 0; } -static int __devexit ds1302_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc = platform_get_drvdata(pdev); - - rtc_device_unregister(rtc); - platform_set_drvdata(pdev, NULL); - - return 0; -} - static struct platform_driver ds1302_platform_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, - .remove = __devexit_p(ds1302_rtc_remove), }; -static int __init ds1302_rtc_init(void) -{ - return platform_driver_probe(&ds1302_platform_driver, ds1302_rtc_probe); -} - -static void __exit ds1302_rtc_exit(void) -{ - platform_driver_unregister(&ds1302_platform_driver); -} - -module_init(ds1302_rtc_init); -module_exit(ds1302_rtc_exit); +module_platform_driver_probe(ds1302_platform_driver, ds1302_rtc_probe); MODULE_DESCRIPTION("Dallas DS1302 RTC driver"); MODULE_VERSION(DRV_VERSION); diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c index 48da85e97ca..129add77065 100644 --- a/drivers/rtc/rtc-ds1305.c +++ b/drivers/rtc/rtc-ds1305.c @@ -17,6 +17,7 @@ #include <linux/spi/spi.h> #include <linux/spi/ds1305.h> +#include <linux/module.h> /* @@ -139,49 +140,32 @@ static u8 hour2bcd(bool hr12, int hour) * Interface to RTC framework */ -#ifdef CONFIG_RTC_INTF_DEV - -/* - * Context: caller holds rtc->ops_lock (to protect ds1305->ctrl) - */ -static int ds1305_ioctl(struct device *dev, unsigned cmd, unsigned long arg) +static int ds1305_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct ds1305 *ds1305 = dev_get_drvdata(dev); u8 buf[2]; - int status = -ENOIOCTLCMD; + long err = -EINVAL; buf[0] = DS1305_WRITE | DS1305_CONTROL; buf[1] = ds1305->ctrl[0]; - switch (cmd) { - case RTC_AIE_OFF: - status = 0; - if (!(buf[1] & DS1305_AEI0)) - goto done; - buf[1] &= ~DS1305_AEI0; - break; - - case RTC_AIE_ON: - status = 0; + if (enabled) { if (ds1305->ctrl[0] & DS1305_AEI0) goto done; buf[1] |= DS1305_AEI0; - break; - } - if (status == 0) { - status = spi_write_then_read(ds1305->spi, buf, sizeof buf, - NULL, 0); - if (status >= 0) - ds1305->ctrl[0] = buf[1]; + } else { + if (!(buf[1] & DS1305_AEI0)) + goto done; + buf[1] &= ~DS1305_AEI0; } - + err = spi_write_then_read(ds1305->spi, buf, sizeof(buf), NULL, 0); + if (err >= 0) + ds1305->ctrl[0] = buf[1]; done: - return status; + return err; + } -#else -#define ds1305_ioctl NULL -#endif /* * Get/set of date and time is pretty normal. @@ -197,8 +181,8 @@ static int ds1305_get_time(struct device *dev, struct rtc_time *time) /* Use write-then-read to get all the date/time registers * since dma from stack is nonportable */ - status = spi_write_then_read(ds1305->spi, &addr, sizeof addr, - buf, sizeof buf); + status = spi_write_then_read(ds1305->spi, &addr, sizeof(addr), + buf, sizeof(buf)); if (status < 0) return status; @@ -253,7 +237,7 @@ static int ds1305_set_time(struct device *dev, struct rtc_time *time) buf[4], buf[5], buf[6], buf[7]); /* use write-then-read since dma from stack is nonportable */ - return spi_write_then_read(ds1305->spi, buf, sizeof buf, + return spi_write_then_read(ds1305->spi, buf, sizeof(buf), NULL, 0); } @@ -302,8 +286,8 @@ static int ds1305_get_alarm(struct device *dev, struct rtc_wkalrm *alm) * of EFI status is at best fragile anyway (given IRQ handlers). */ addr = DS1305_CONTROL; - status = spi_write_then_read(spi, &addr, sizeof addr, - ds1305->ctrl, sizeof ds1305->ctrl); + status = spi_write_then_read(spi, &addr, sizeof(addr), + ds1305->ctrl, sizeof(ds1305->ctrl)); if (status < 0) return status; @@ -312,8 +296,8 @@ static int ds1305_get_alarm(struct device *dev, struct rtc_wkalrm *alm) /* get and check ALM0 registers */ addr = DS1305_ALM0(DS1305_SEC); - status = spi_write_then_read(spi, &addr, sizeof addr, - buf, sizeof buf); + status = spi_write_then_read(spi, &addr, sizeof(addr), + buf, sizeof(buf)); if (status < 0) return status; @@ -397,7 +381,7 @@ static int ds1305_set_alarm(struct device *dev, struct rtc_wkalrm *alm) "alm0 write", buf[1 + DS1305_SEC], buf[1 + DS1305_MIN], buf[1 + DS1305_HOUR], buf[1 + DS1305_WDAY]); - status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0); + status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0); if (status < 0) return status; @@ -460,12 +444,12 @@ done: #endif static const struct rtc_class_ops ds1305_ops = { - .ioctl = ds1305_ioctl, .read_time = ds1305_get_time, .set_time = ds1305_set_time, .read_alarm = ds1305_get_alarm, .set_alarm = ds1305_set_alarm, .proc = ds1305_proc, + .alarm_irq_enable = ds1305_alarm_irq_enable, }; static void ds1305_work(struct work_struct *work) @@ -490,7 +474,7 @@ static void ds1305_work(struct work_struct *work) buf[1] = ds1305->ctrl[0]; buf[2] = 0; - status = spi_write_then_read(spi, buf, sizeof buf, + status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0); if (status < 0) dev_dbg(&spi->dev, "clear irq --> %d\n", status); @@ -617,12 +601,12 @@ static struct bin_attribute nvram = { * Interface to SPI stack */ -static int __devinit ds1305_probe(struct spi_device *spi) +static int ds1305_probe(struct spi_device *spi) { struct ds1305 *ds1305; int status; u8 addr, value; - struct ds1305_platform_data *pdata = spi->dev.platform_data; + struct ds1305_platform_data *pdata = dev_get_platdata(&spi->dev); bool write_ctrl = false; /* Sanity check board setup data. This may be hooked up @@ -635,7 +619,7 @@ static int __devinit ds1305_probe(struct spi_device *spi) return -EINVAL; /* set up driver data */ - ds1305 = kzalloc(sizeof *ds1305, GFP_KERNEL); + ds1305 = devm_kzalloc(&spi->dev, sizeof(*ds1305), GFP_KERNEL); if (!ds1305) return -ENOMEM; ds1305->spi = spi; @@ -643,17 +627,15 @@ static int __devinit ds1305_probe(struct spi_device *spi) /* read and cache control registers */ addr = DS1305_CONTROL; - status = spi_write_then_read(spi, &addr, sizeof addr, - ds1305->ctrl, sizeof ds1305->ctrl); + status = spi_write_then_read(spi, &addr, sizeof(addr), + ds1305->ctrl, sizeof(ds1305->ctrl)); if (status < 0) { dev_dbg(&spi->dev, "can't %s, %d\n", "read", status); - goto fail0; + return status; } - dev_dbg(&spi->dev, "ctrl %s: %02x %02x %02x\n", - "read", ds1305->ctrl[0], - ds1305->ctrl[1], ds1305->ctrl[2]); + dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "read", ds1305->ctrl); /* Sanity check register values ... partially compensating for the * fact that SPI has no device handshake. A pullup on MISO would @@ -662,8 +644,7 @@ static int __devinit ds1305_probe(struct spi_device *spi) */ if ((ds1305->ctrl[0] & 0x38) != 0 || (ds1305->ctrl[1] & 0xfc) != 0) { dev_dbg(&spi->dev, "RTC chip is not present\n"); - status = -ENODEV; - goto fail0; + return -ENODEV; } if (ds1305->ctrl[2] == 0) dev_dbg(&spi->dev, "chip may not be present\n"); @@ -678,11 +659,11 @@ static int __devinit ds1305_probe(struct spi_device *spi) buf[0] = DS1305_WRITE | DS1305_CONTROL; buf[1] = ds1305->ctrl[0]; - status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0); + status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0); dev_dbg(&spi->dev, "clear WP --> %d\n", status); if (status < 0) - goto fail0; + return status; } /* on DS1305, maybe start oscillator; like most low power @@ -732,25 +713,23 @@ static int __devinit ds1305_probe(struct spi_device *spi) buf[1] = ds1305->ctrl[0]; buf[2] = ds1305->ctrl[1]; buf[3] = ds1305->ctrl[2]; - status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0); + status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0); if (status < 0) { dev_dbg(&spi->dev, "can't %s, %d\n", "write", status); - goto fail0; + return status; } - dev_dbg(&spi->dev, "ctrl %s: %02x %02x %02x\n", - "write", ds1305->ctrl[0], - ds1305->ctrl[1], ds1305->ctrl[2]); + dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "write", ds1305->ctrl); } /* see if non-Linux software set up AM/PM mode */ addr = DS1305_HOUR; - status = spi_write_then_read(spi, &addr, sizeof addr, - &value, sizeof value); + status = spi_write_then_read(spi, &addr, sizeof(addr), + &value, sizeof(value)); if (status < 0) { dev_dbg(&spi->dev, "read HOUR --> %d\n", status); - goto fail0; + return status; } ds1305->hr12 = (DS1305_HR_12 & value) != 0; @@ -758,12 +737,12 @@ static int __devinit ds1305_probe(struct spi_device *spi) dev_dbg(&spi->dev, "AM/PM\n"); /* register RTC ... from here on, ds1305->ctrl needs locking */ - ds1305->rtc = rtc_device_register("ds1305", &spi->dev, + ds1305->rtc = devm_rtc_device_register(&spi->dev, "ds1305", &ds1305_ops, THIS_MODULE); if (IS_ERR(ds1305->rtc)) { status = PTR_ERR(ds1305->rtc); dev_dbg(&spi->dev, "register rtc --> %d\n", status); - goto fail0; + return status; } /* Maybe set up alarm IRQ; be ready to handle it triggering right @@ -774,36 +753,26 @@ static int __devinit ds1305_probe(struct spi_device *spi) */ if (spi->irq) { INIT_WORK(&ds1305->work, ds1305_work); - status = request_irq(spi->irq, ds1305_irq, + status = devm_request_irq(&spi->dev, spi->irq, ds1305_irq, 0, dev_name(&ds1305->rtc->dev), ds1305); if (status < 0) { - dev_dbg(&spi->dev, "request_irq %d --> %d\n", + dev_err(&spi->dev, "request_irq %d --> %d\n", spi->irq, status); - goto fail1; + } else { + device_set_wakeup_capable(&spi->dev, 1); } - - device_set_wakeup_capable(&spi->dev, 1); } /* export NVRAM */ status = sysfs_create_bin_file(&spi->dev.kobj, &nvram); if (status < 0) { - dev_dbg(&spi->dev, "register nvram --> %d\n", status); - goto fail2; + dev_err(&spi->dev, "register nvram --> %d\n", status); } return 0; - -fail2: - free_irq(spi->irq, ds1305); -fail1: - rtc_device_unregister(ds1305->rtc); -fail0: - kfree(ds1305); - return status; } -static int __devexit ds1305_remove(struct spi_device *spi) +static int ds1305_remove(struct spi_device *spi) { struct ds1305 *ds1305 = spi_get_drvdata(spi); @@ -812,13 +781,10 @@ static int __devexit ds1305_remove(struct spi_device *spi) /* carefully shut down irq and workqueue, if present */ if (spi->irq) { set_bit(FLAG_EXITING, &ds1305->flags); - free_irq(spi->irq, ds1305); - flush_scheduled_work(); + devm_free_irq(&spi->dev, spi->irq, ds1305); + cancel_work_sync(&ds1305->work); } - rtc_device_unregister(ds1305->rtc); - spi_set_drvdata(spi, NULL); - kfree(ds1305); return 0; } @@ -826,21 +792,11 @@ static struct spi_driver ds1305_driver = { .driver.name = "rtc-ds1305", .driver.owner = THIS_MODULE, .probe = ds1305_probe, - .remove = __devexit_p(ds1305_remove), + .remove = ds1305_remove, /* REVISIT add suspend/resume */ }; -static int __init ds1305_init(void) -{ - return spi_register_driver(&ds1305_driver); -} -module_init(ds1305_init); - -static void __exit ds1305_exit(void) -{ - spi_unregister_driver(&ds1305_driver); -} -module_exit(ds1305_exit); +module_spi_driver(ds1305_driver); MODULE_DESCRIPTION("RTC driver for DS1305 and DS1306 chips"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index d827ce570a8..f03d5ba96db 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -4,6 +4,7 @@ * Copyright (C) 2005 James Chapman (ds1337 core) * Copyright (C) 2006 David Brownell * Copyright (C) 2009 Matthias Fuchs (rx8025 support) + * Copyright (C) 2012 Bertrand Achard (nvram access fixes) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -17,10 +18,10 @@ #include <linux/string.h> #include <linux/rtc.h> #include <linux/bcd.h> +#include <linux/rtc/ds1307.h> - - -/* We can't determine type by probing, but if we expect pre-Linux code +/* + * We can't determine type by probing, but if we expect pre-Linux code * to have set the chip up as a clock (turning on the oscillator and * setting the date and time), Linux can ignore the non-clock features. * That's a natural job for a factory or repair bench. @@ -34,8 +35,10 @@ enum ds_type { ds_1388, ds_3231, m41t00, + mcp7941x, rx_8025, - // rs5c372 too? different address... + last_ds_type /* always last */ + /* rs5c372 too? different address... */ }; @@ -43,6 +46,7 @@ enum ds_type { #define DS1307_REG_SECS 0x00 /* 00-59 */ # define DS1307_BIT_CH 0x80 # define DS1340_BIT_nEOSC 0x80 +# define MCP7941X_BIT_ST 0x80 #define DS1307_REG_MIN 0x01 /* 00-59 */ #define DS1307_REG_HOUR 0x02 /* 00-23, or 1-12{am,pm} */ # define DS1307_BIT_12HR 0x40 /* in REG_HOUR */ @@ -50,12 +54,14 @@ enum ds_type { # define DS1340_BIT_CENTURY_EN 0x80 /* in REG_HOUR */ # define DS1340_BIT_CENTURY 0x40 /* in REG_HOUR */ #define DS1307_REG_WDAY 0x03 /* 01-07 */ +# define MCP7941X_BIT_VBATEN 0x08 #define DS1307_REG_MDAY 0x04 /* 01-31 */ #define DS1307_REG_MONTH 0x05 /* 01-12 */ # define DS1337_BIT_CENTURY 0x80 /* in REG_MONTH */ #define DS1307_REG_YEAR 0x06 /* 00-99 */ -/* Other registers (control, status, alarms, trickle charge, NVRAM, etc) +/* + * Other registers (control, status, alarms, trickle charge, NVRAM, etc) * start at 7, and they differ a LOT. Only control and status matter for * basic RTC date and time functionality; be careful using them. */ @@ -86,7 +92,8 @@ enum ds_type { # define DS1337_BIT_A2I 0x02 # define DS1337_BIT_A1I 0x01 #define DS1339_REG_ALARM1_SECS 0x07 -#define DS1339_REG_TRICKLE 0x10 + +#define DS13XX_TRICKLE_CHARGER_MAGIC 0xa0 #define RX8025_REG_CTRL1 0x0e # define RX8025_BIT_2412 0x20 @@ -99,6 +106,8 @@ enum ds_type { struct ds1307 { u8 offset; /* register's offset */ u8 regs[11]; + u16 nvram_offset; + struct bin_attribute *nvram; enum ds_type type; unsigned long flags; #define HAS_NVRAM 0 /* bit 0 == sysfs file active */ @@ -106,39 +115,51 @@ struct ds1307 { struct i2c_client *client; struct rtc_device *rtc; struct work_struct work; - s32 (*read_block_data)(struct i2c_client *client, u8 command, + s32 (*read_block_data)(const struct i2c_client *client, u8 command, u8 length, u8 *values); - s32 (*write_block_data)(struct i2c_client *client, u8 command, + s32 (*write_block_data)(const struct i2c_client *client, u8 command, u8 length, const u8 *values); }; struct chip_desc { - unsigned nvram56:1; unsigned alarm:1; + u16 nvram_offset; + u16 nvram_size; + u16 trickle_charger_reg; }; -static const struct chip_desc chips[] = { -[ds_1307] = { - .nvram56 = 1, -}, -[ds_1337] = { - .alarm = 1, -}, -[ds_1338] = { - .nvram56 = 1, -}, -[ds_1339] = { - .alarm = 1, -}, -[ds_1340] = { -}, -[ds_3231] = { - .alarm = 1, -}, -[m41t00] = { -}, -[rx_8025] = { -}, }; +static const struct chip_desc chips[last_ds_type] = { + [ds_1307] = { + .nvram_offset = 8, + .nvram_size = 56, + }, + [ds_1337] = { + .alarm = 1, + }, + [ds_1338] = { + .nvram_offset = 8, + .nvram_size = 56, + }, + [ds_1339] = { + .alarm = 1, + .trickle_charger_reg = 0x10, + }, + [ds_1340] = { + .trickle_charger_reg = 0x08, + }, + [ds_1388] = { + .trickle_charger_reg = 0x0a, + }, + [ds_3231] = { + .alarm = 1, + }, + [mcp7941x] = { + .alarm = 1, + /* this is battery backed SRAM */ + .nvram_offset = 0x20, + .nvram_size = 0x40, + }, +}; static const struct i2c_device_id ds1307_id[] = { { "ds1307", ds_1307 }, @@ -149,6 +170,8 @@ static const struct i2c_device_id ds1307_id[] = { { "ds1340", ds_1340 }, { "ds3231", ds_3231 }, { "m41t00", m41t00 }, + { "mcp7941x", mcp7941x }, + { "pt7c4338", ds_1307 }, { "rx8025", rx_8025 }, { } }; @@ -158,8 +181,8 @@ MODULE_DEVICE_TABLE(i2c, ds1307_id); #define BLOCK_DATA_MAX_TRIES 10 -static s32 ds1307_read_block_data_once(struct i2c_client *client, u8 command, - u8 length, u8 *values) +static s32 ds1307_read_block_data_once(const struct i2c_client *client, + u8 command, u8 length, u8 *values) { s32 i, data; @@ -172,10 +195,10 @@ static s32 ds1307_read_block_data_once(struct i2c_client *client, u8 command, return i; } -static s32 ds1307_read_block_data(struct i2c_client *client, u8 command, +static s32 ds1307_read_block_data(const struct i2c_client *client, u8 command, u8 length, u8 *values) { - u8 oldvalues[I2C_SMBUS_BLOCK_MAX]; + u8 oldvalues[255]; s32 ret; int tries = 0; @@ -198,10 +221,10 @@ static s32 ds1307_read_block_data(struct i2c_client *client, u8 command, return length; } -static s32 ds1307_write_block_data(struct i2c_client *client, u8 command, +static s32 ds1307_write_block_data(const struct i2c_client *client, u8 command, u8 length, const u8 *values) { - u8 currvalues[I2C_SMBUS_BLOCK_MAX]; + u8 currvalues[255]; int tries = 0; dev_dbg(&client->dev, "ds1307_write_block_data (length=%d)\n", length); @@ -229,6 +252,57 @@ static s32 ds1307_write_block_data(struct i2c_client *client, u8 command, /*----------------------------------------------------------------------*/ +/* These RTC devices are not designed to be connected to a SMbus adapter. + SMbus limits block operations length to 32 bytes, whereas it's not + limited on I2C buses. As a result, accesses may exceed 32 bytes; + in that case, split them into smaller blocks */ + +static s32 ds1307_native_smbus_write_block_data(const struct i2c_client *client, + u8 command, u8 length, const u8 *values) +{ + u8 suboffset = 0; + + if (length <= I2C_SMBUS_BLOCK_MAX) + return i2c_smbus_write_i2c_block_data(client, + command, length, values); + + while (suboffset < length) { + s32 retval = i2c_smbus_write_i2c_block_data(client, + command + suboffset, + min(I2C_SMBUS_BLOCK_MAX, length - suboffset), + values + suboffset); + if (retval < 0) + return retval; + + suboffset += I2C_SMBUS_BLOCK_MAX; + } + return length; +} + +static s32 ds1307_native_smbus_read_block_data(const struct i2c_client *client, + u8 command, u8 length, u8 *values) +{ + u8 suboffset = 0; + + if (length <= I2C_SMBUS_BLOCK_MAX) + return i2c_smbus_read_i2c_block_data(client, + command, length, values); + + while (suboffset < length) { + s32 retval = i2c_smbus_read_i2c_block_data(client, + command + suboffset, + min(I2C_SMBUS_BLOCK_MAX, length - suboffset), + values + suboffset); + if (retval < 0) + return retval; + + suboffset += I2C_SMBUS_BLOCK_MAX; + } + return length; +} + +/*----------------------------------------------------------------------*/ + /* * The IRQ logic includes a "real" handler running in IRQ context just * long enough to schedule this workqueue entry. We need a task context @@ -301,12 +375,7 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) return -EIO; } - dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x\n", - "read", - ds1307->regs[0], ds1307->regs[1], - ds1307->regs[2], ds1307->regs[3], - ds1307->regs[4], ds1307->regs[5], - ds1307->regs[6]); + dev_dbg(dev, "%s: %7ph\n", "read", ds1307->regs); t->tm_sec = bcd2bin(ds1307->regs[DS1307_REG_SECS] & 0x7f); t->tm_min = bcd2bin(ds1307->regs[DS1307_REG_MIN] & 0x7f); @@ -364,13 +433,20 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN | DS1340_BIT_CENTURY; break; + case mcp7941x: + /* + * these bits were cleared when preparing the date/time + * values and need to be set again before writing the + * buffer out to the device. + */ + buf[DS1307_REG_SECS] |= MCP7941X_BIT_ST; + buf[DS1307_REG_WDAY] |= MCP7941X_BIT_VBATEN; + break; default: break; } - dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x\n", - "write", buf[0], buf[1], buf[2], buf[3], - buf[4], buf[5], buf[6]); + dev_dbg(dev, "%s: %7ph\n", "write", buf); result = ds1307->write_block_data(ds1307->client, ds1307->offset, 7, buf); @@ -406,7 +482,8 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t) ds1307->regs[6], ds1307->regs[7], ds1307->regs[8]); - /* report alarm time (ALARM1); assume 24 hour and day-of-month modes, + /* + * report alarm time (ALARM1); assume 24 hour and day-of-month modes, * and that all four fields are checked matches */ t->time.tm_sec = bcd2bin(ds1307->regs[0] & 0x7f); @@ -434,7 +511,7 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t) static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = to_i2c_client(dev); struct ds1307 *ds1307 = i2c_get_clientdata(client); unsigned char *buf = ds1307->regs; u8 control, status; @@ -495,66 +572,213 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t) return 0; } -static int ds1307_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +static int ds1307_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct i2c_client *client = to_i2c_client(dev); struct ds1307 *ds1307 = i2c_get_clientdata(client); int ret; - switch (cmd) { - case RTC_AIE_OFF: - if (!test_bit(HAS_ALARM, &ds1307->flags)) - return -ENOTTY; + if (!test_bit(HAS_ALARM, &ds1307->flags)) + return -ENOTTY; - ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL); - if (ret < 0) - return ret; + ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL); + if (ret < 0) + return ret; + if (enabled) + ret |= DS1337_BIT_A1IE; + else ret &= ~DS1337_BIT_A1IE; - ret = i2c_smbus_write_byte_data(client, - DS1337_REG_CONTROL, ret); - if (ret < 0) - return ret; + ret = i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, ret); + if (ret < 0) + return ret; - break; + return 0; +} - case RTC_AIE_ON: - if (!test_bit(HAS_ALARM, &ds1307->flags)) - return -ENOTTY; +static const struct rtc_class_ops ds13xx_rtc_ops = { + .read_time = ds1307_get_time, + .set_time = ds1307_set_time, + .read_alarm = ds1337_read_alarm, + .set_alarm = ds1337_set_alarm, + .alarm_irq_enable = ds1307_alarm_irq_enable, +}; - ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL); - if (ret < 0) - return ret; +/*----------------------------------------------------------------------*/ - ret |= DS1337_BIT_A1IE; +/* + * Alarm support for mcp7941x devices. + */ - ret = i2c_smbus_write_byte_data(client, - DS1337_REG_CONTROL, ret); - if (ret < 0) - return ret; +#define MCP7941X_REG_CONTROL 0x07 +# define MCP7941X_BIT_ALM0_EN 0x10 +# define MCP7941X_BIT_ALM1_EN 0x20 +#define MCP7941X_REG_ALARM0_BASE 0x0a +#define MCP7941X_REG_ALARM0_CTRL 0x0d +#define MCP7941X_REG_ALARM1_BASE 0x11 +#define MCP7941X_REG_ALARM1_CTRL 0x14 +# define MCP7941X_BIT_ALMX_IF (1 << 3) +# define MCP7941X_BIT_ALMX_C0 (1 << 4) +# define MCP7941X_BIT_ALMX_C1 (1 << 5) +# define MCP7941X_BIT_ALMX_C2 (1 << 6) +# define MCP7941X_BIT_ALMX_POL (1 << 7) +# define MCP7941X_MSK_ALMX_MATCH (MCP7941X_BIT_ALMX_C0 | \ + MCP7941X_BIT_ALMX_C1 | \ + MCP7941X_BIT_ALMX_C2) + +static void mcp7941x_work(struct work_struct *work) +{ + struct ds1307 *ds1307 = container_of(work, struct ds1307, work); + struct i2c_client *client = ds1307->client; + int reg, ret; - break; + mutex_lock(&ds1307->rtc->ops_lock); - default: - return -ENOIOCTLCMD; - } + /* Check and clear alarm 0 interrupt flag. */ + reg = i2c_smbus_read_byte_data(client, MCP7941X_REG_ALARM0_CTRL); + if (reg < 0) + goto out; + if (!(reg & MCP7941X_BIT_ALMX_IF)) + goto out; + reg &= ~MCP7941X_BIT_ALMX_IF; + ret = i2c_smbus_write_byte_data(client, MCP7941X_REG_ALARM0_CTRL, reg); + if (ret < 0) + goto out; + + /* Disable alarm 0. */ + reg = i2c_smbus_read_byte_data(client, MCP7941X_REG_CONTROL); + if (reg < 0) + goto out; + reg &= ~MCP7941X_BIT_ALM0_EN; + ret = i2c_smbus_write_byte_data(client, MCP7941X_REG_CONTROL, reg); + if (ret < 0) + goto out; + + rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF); + +out: + if (test_bit(HAS_ALARM, &ds1307->flags)) + enable_irq(client->irq); + mutex_unlock(&ds1307->rtc->ops_lock); +} + +static int mcp7941x_read_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ds1307 *ds1307 = i2c_get_clientdata(client); + u8 *regs = ds1307->regs; + int ret; + + if (!test_bit(HAS_ALARM, &ds1307->flags)) + return -EINVAL; + + /* Read control and alarm 0 registers. */ + ret = ds1307->read_block_data(client, MCP7941X_REG_CONTROL, 10, regs); + if (ret < 0) + return ret; + + t->enabled = !!(regs[0] & MCP7941X_BIT_ALM0_EN); + + /* Report alarm 0 time assuming 24-hour and day-of-month modes. */ + t->time.tm_sec = bcd2bin(ds1307->regs[3] & 0x7f); + t->time.tm_min = bcd2bin(ds1307->regs[4] & 0x7f); + t->time.tm_hour = bcd2bin(ds1307->regs[5] & 0x3f); + t->time.tm_wday = bcd2bin(ds1307->regs[6] & 0x7) - 1; + t->time.tm_mday = bcd2bin(ds1307->regs[7] & 0x3f); + t->time.tm_mon = bcd2bin(ds1307->regs[8] & 0x1f) - 1; + t->time.tm_year = -1; + t->time.tm_yday = -1; + t->time.tm_isdst = -1; + + dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d " + "enabled=%d polarity=%d irq=%d match=%d\n", __func__, + t->time.tm_sec, t->time.tm_min, t->time.tm_hour, + t->time.tm_wday, t->time.tm_mday, t->time.tm_mon, t->enabled, + !!(ds1307->regs[6] & MCP7941X_BIT_ALMX_POL), + !!(ds1307->regs[6] & MCP7941X_BIT_ALMX_IF), + (ds1307->regs[6] & MCP7941X_MSK_ALMX_MATCH) >> 4); return 0; } -static const struct rtc_class_ops ds13xx_rtc_ops = { +static int mcp7941x_set_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ds1307 *ds1307 = i2c_get_clientdata(client); + unsigned char *regs = ds1307->regs; + int ret; + + if (!test_bit(HAS_ALARM, &ds1307->flags)) + return -EINVAL; + + dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d " + "enabled=%d pending=%d\n", __func__, + t->time.tm_sec, t->time.tm_min, t->time.tm_hour, + t->time.tm_wday, t->time.tm_mday, t->time.tm_mon, + t->enabled, t->pending); + + /* Read control and alarm 0 registers. */ + ret = ds1307->read_block_data(client, MCP7941X_REG_CONTROL, 10, regs); + if (ret < 0) + return ret; + + /* Set alarm 0, using 24-hour and day-of-month modes. */ + regs[3] = bin2bcd(t->time.tm_sec); + regs[4] = bin2bcd(t->time.tm_min); + regs[5] = bin2bcd(t->time.tm_hour); + regs[6] = bin2bcd(t->time.tm_wday) + 1; + regs[7] = bin2bcd(t->time.tm_mday); + regs[8] = bin2bcd(t->time.tm_mon) + 1; + + /* Clear the alarm 0 interrupt flag. */ + regs[6] &= ~MCP7941X_BIT_ALMX_IF; + /* Set alarm match: second, minute, hour, day, date, month. */ + regs[6] |= MCP7941X_MSK_ALMX_MATCH; + + if (t->enabled) + regs[0] |= MCP7941X_BIT_ALM0_EN; + else + regs[0] &= ~MCP7941X_BIT_ALM0_EN; + + ret = ds1307->write_block_data(client, MCP7941X_REG_CONTROL, 10, regs); + if (ret < 0) + return ret; + + return 0; +} + +static int mcp7941x_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ds1307 *ds1307 = i2c_get_clientdata(client); + int reg; + + if (!test_bit(HAS_ALARM, &ds1307->flags)) + return -EINVAL; + + reg = i2c_smbus_read_byte_data(client, MCP7941X_REG_CONTROL); + if (reg < 0) + return reg; + + if (enabled) + reg |= MCP7941X_BIT_ALM0_EN; + else + reg &= ~MCP7941X_BIT_ALM0_EN; + + return i2c_smbus_write_byte_data(client, MCP7941X_REG_CONTROL, reg); +} + +static const struct rtc_class_ops mcp7941x_rtc_ops = { .read_time = ds1307_get_time, .set_time = ds1307_set_time, - .read_alarm = ds1337_read_alarm, - .set_alarm = ds1337_set_alarm, - .ioctl = ds1307_ioctl, + .read_alarm = mcp7941x_read_alarm, + .set_alarm = mcp7941x_set_alarm, + .alarm_irq_enable = mcp7941x_alarm_irq_enable, }; /*----------------------------------------------------------------------*/ -#define NVRAM_SIZE 56 - static ssize_t ds1307_nvram_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, @@ -567,14 +791,15 @@ ds1307_nvram_read(struct file *filp, struct kobject *kobj, client = kobj_to_i2c_client(kobj); ds1307 = i2c_get_clientdata(client); - if (unlikely(off >= NVRAM_SIZE)) + if (unlikely(off >= ds1307->nvram->size)) return 0; - if ((off + count) > NVRAM_SIZE) - count = NVRAM_SIZE - off; + if ((off + count) > ds1307->nvram->size) + count = ds1307->nvram->size - off; if (unlikely(!count)) return count; - result = ds1307->read_block_data(client, 8 + off, count, buf); + result = ds1307->read_block_data(client, ds1307->nvram_offset + off, + count, buf); if (result < 0) dev_err(&client->dev, "%s error %d\n", "nvram read", result); return result; @@ -592,14 +817,15 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj, client = kobj_to_i2c_client(kobj); ds1307 = i2c_get_clientdata(client); - if (unlikely(off >= NVRAM_SIZE)) + if (unlikely(off >= ds1307->nvram->size)) return -EFBIG; - if ((off + count) > NVRAM_SIZE) - count = NVRAM_SIZE - off; + if ((off + count) > ds1307->nvram->size) + count = ds1307->nvram->size - off; if (unlikely(!count)) return count; - result = ds1307->write_block_data(client, 8 + off, count, buf); + result = ds1307->write_block_data(client, ds1307->nvram_offset + off, + count, buf); if (result < 0) { dev_err(&client->dev, "%s error %d\n", "nvram write", result); return result; @@ -607,54 +833,47 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj, return count; } -static struct bin_attribute nvram = { - .attr = { - .name = "nvram", - .mode = S_IRUGO | S_IWUSR, - }, - - .read = ds1307_nvram_read, - .write = ds1307_nvram_write, - .size = NVRAM_SIZE, -}; - /*----------------------------------------------------------------------*/ -static struct i2c_driver ds1307_driver; - -static int __devinit ds1307_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int ds1307_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct ds1307 *ds1307; int err = -ENODEV; int tmp; const struct chip_desc *chip = &chips[id->driver_data]; struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); - int want_irq = false; + bool want_irq = false; unsigned char *buf; + struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev); static const int bbsqi_bitpos[] = { [ds_1337] = 0, [ds_1339] = DS1339_BIT_BBSQI, [ds_3231] = DS3231_BIT_BBSQW, }; + const struct rtc_class_ops *rtc_ops = &ds13xx_rtc_ops; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA) && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) return -EIO; - if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL))) + ds1307 = devm_kzalloc(&client->dev, sizeof(struct ds1307), GFP_KERNEL); + if (!ds1307) return -ENOMEM; i2c_set_clientdata(client, ds1307); ds1307->client = client; ds1307->type = id->driver_data; - ds1307->offset = 0; + + if (pdata && pdata->trickle_charger_setup && chip->trickle_charger_reg) + i2c_smbus_write_byte_data(client, chip->trickle_charger_reg, + DS13XX_TRICKLE_CHARGER_MAGIC | pdata->trickle_charger_setup); buf = ds1307->regs; if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { - ds1307->read_block_data = i2c_smbus_read_i2c_block_data; - ds1307->write_block_data = i2c_smbus_write_i2c_block_data; + ds1307->read_block_data = ds1307_native_smbus_read_block_data; + ds1307->write_block_data = ds1307_native_smbus_write_block_data; } else { ds1307->read_block_data = ds1307_read_block_data; ds1307->write_block_data = ds1307_write_block_data; @@ -664,32 +883,32 @@ static int __devinit ds1307_probe(struct i2c_client *client, case ds_1337: case ds_1339: case ds_3231: - /* has IRQ? */ - if (ds1307->client->irq > 0 && chip->alarm) { - INIT_WORK(&ds1307->work, ds1307_work); - want_irq = true; - } /* get registers that the "rtc" read below won't read... */ tmp = ds1307->read_block_data(ds1307->client, DS1337_REG_CONTROL, 2, buf); if (tmp != 2) { - pr_debug("read error %d\n", tmp); + dev_dbg(&client->dev, "read error %d\n", tmp); err = -EIO; - goto exit_free; + goto exit; } /* oscillator off? turn it on, so clock can tick. */ if (ds1307->regs[0] & DS1337_BIT_nEOSC) ds1307->regs[0] &= ~DS1337_BIT_nEOSC; - /* Using IRQ? Disable the square wave and both alarms. + /* + * Using IRQ? Disable the square wave and both alarms. * For some variants, be sure alarms can trigger when we're * running on Vbackup (BBSQI/BBSQW) */ - if (want_irq) { + if (ds1307->client->irq > 0 && chip->alarm) { + INIT_WORK(&ds1307->work, ds1307_work); + ds1307->regs[0] |= DS1337_BIT_INTCN | bbsqi_bitpos[ds1307->type]; ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); + + want_irq = true; } i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, @@ -707,9 +926,9 @@ static int __devinit ds1307_probe(struct i2c_client *client, tmp = i2c_smbus_read_i2c_block_data(ds1307->client, RX8025_REG_CTRL1 << 4 | 0x08, 2, buf); if (tmp != 2) { - pr_debug("read error %d\n", tmp); + dev_dbg(&client->dev, "read error %d\n", tmp); err = -EIO; - goto exit_free; + goto exit; } /* oscillator off? turn it on, so clock can tick. */ @@ -751,9 +970,9 @@ static int __devinit ds1307_probe(struct i2c_client *client, tmp = i2c_smbus_read_i2c_block_data(ds1307->client, RX8025_REG_CTRL1 << 4 | 0x08, 2, buf); if (tmp != 2) { - pr_debug("read error %d\n", tmp); + dev_dbg(&client->dev, "read error %d\n", tmp); err = -EIO; - goto exit_free; + goto exit; } /* correct hour */ @@ -771,6 +990,13 @@ static int __devinit ds1307_probe(struct i2c_client *client, case ds_1388: ds1307->offset = 1; /* Seconds starts at 1 */ break; + case mcp7941x: + rtc_ops = &mcp7941x_rtc_ops; + if (ds1307->client->irq > 0 && chip->alarm) { + INIT_WORK(&ds1307->work, mcp7941x_work); + want_irq = true; + } + break; default: break; } @@ -779,12 +1005,13 @@ read_rtc: /* read RTC registers */ tmp = ds1307->read_block_data(ds1307->client, ds1307->offset, 8, buf); if (tmp != 8) { - pr_debug("read error %d\n", tmp); + dev_dbg(&client->dev, "read error %d\n", tmp); err = -EIO; - goto exit_free; + goto exit; } - /* minimal sanity checking; some chips (like DS1340) don't + /* + * minimal sanity checking; some chips (like DS1340) don't * specify the extra bits as must-be-zero, but there are * still a few values that are clearly out-of-range. */ @@ -820,9 +1047,9 @@ read_rtc: tmp = i2c_smbus_read_byte_data(client, DS1340_REG_FLAG); if (tmp < 0) { - pr_debug("read error %d\n", tmp); + dev_dbg(&client->dev, "read error %d\n", tmp); err = -EIO; - goto exit_free; + goto exit; } /* oscillator fault? clear flag, and warn */ @@ -831,11 +1058,24 @@ read_rtc: dev_warn(&client->dev, "SET TIME!\n"); } break; - case rx_8025: - case ds_1337: - case ds_1339: - case ds_1388: - case ds_3231: + case mcp7941x: + /* make sure that the backup battery is enabled */ + if (!(ds1307->regs[DS1307_REG_WDAY] & MCP7941X_BIT_VBATEN)) { + i2c_smbus_write_byte_data(client, DS1307_REG_WDAY, + ds1307->regs[DS1307_REG_WDAY] + | MCP7941X_BIT_VBATEN); + } + + /* clock halted? turn it on, so clock can tick. */ + if (!(tmp & MCP7941X_BIT_ST)) { + i2c_smbus_write_byte_data(client, DS1307_REG_SECS, + MCP7941X_BIT_ST); + dev_warn(&client->dev, "SET TIME!\n"); + goto read_rtc; + } + + break; + default: break; } @@ -843,7 +1083,8 @@ read_rtc: switch (ds1307->type) { case ds_1340: case m41t00: - /* NOTE: ignores century bits; fix before deploying + /* + * NOTE: ignores century bits; fix before deploying * systems that will run through year 2100. */ break; @@ -853,7 +1094,8 @@ read_rtc: if (!(tmp & DS1307_BIT_12HR)) break; - /* Be sure we're in 24 hour mode. Multi-master systems + /* + * Be sure we're in 24 hour mode. Multi-master systems * take note... */ tmp = bcd2bin(tmp & 0x1f); @@ -866,49 +1108,68 @@ read_rtc: bin2bcd(tmp)); } - ds1307->rtc = rtc_device_register(client->name, &client->dev, - &ds13xx_rtc_ops, THIS_MODULE); + device_set_wakeup_capable(&client->dev, want_irq); + ds1307->rtc = devm_rtc_device_register(&client->dev, client->name, + rtc_ops, THIS_MODULE); if (IS_ERR(ds1307->rtc)) { - err = PTR_ERR(ds1307->rtc); - dev_err(&client->dev, - "unable to register the class device\n"); - goto exit_free; + return PTR_ERR(ds1307->rtc); } if (want_irq) { err = request_irq(client->irq, ds1307_irq, IRQF_SHARED, ds1307->rtc->name, client); if (err) { - dev_err(&client->dev, - "unable to request IRQ!\n"); - goto exit_irq; - } + client->irq = 0; + dev_err(&client->dev, "unable to request IRQ!\n"); + } else { - device_set_wakeup_capable(&client->dev, 1); - set_bit(HAS_ALARM, &ds1307->flags); - dev_dbg(&client->dev, "got IRQ %d\n", client->irq); + set_bit(HAS_ALARM, &ds1307->flags); + dev_dbg(&client->dev, "got IRQ %d\n", client->irq); + } } - if (chip->nvram56) { - err = sysfs_create_bin_file(&client->dev.kobj, &nvram); - if (err == 0) { - set_bit(HAS_NVRAM, &ds1307->flags); - dev_info(&client->dev, "56 bytes nvram\n"); + if (chip->nvram_size) { + + ds1307->nvram = devm_kzalloc(&client->dev, + sizeof(struct bin_attribute), + GFP_KERNEL); + if (!ds1307->nvram) { + dev_err(&client->dev, "cannot allocate memory for nvram sysfs\n"); + } else { + + ds1307->nvram->attr.name = "nvram"; + ds1307->nvram->attr.mode = S_IRUGO | S_IWUSR; + + sysfs_bin_attr_init(ds1307->nvram); + + ds1307->nvram->read = ds1307_nvram_read; + ds1307->nvram->write = ds1307_nvram_write; + ds1307->nvram->size = chip->nvram_size; + ds1307->nvram_offset = chip->nvram_offset; + + err = sysfs_create_bin_file(&client->dev.kobj, + ds1307->nvram); + if (err) { + dev_err(&client->dev, + "unable to create sysfs file: %s\n", + ds1307->nvram->attr.name); + } else { + set_bit(HAS_NVRAM, &ds1307->flags); + dev_info(&client->dev, "%zu bytes nvram\n", + ds1307->nvram->size); + } } } return 0; -exit_irq: - rtc_device_unregister(ds1307->rtc); -exit_free: - kfree(ds1307); +exit: return err; } -static int __devexit ds1307_remove(struct i2c_client *client) +static int ds1307_remove(struct i2c_client *client) { - struct ds1307 *ds1307 = i2c_get_clientdata(client); + struct ds1307 *ds1307 = i2c_get_clientdata(client); if (test_and_clear_bit(HAS_ALARM, &ds1307->flags)) { free_irq(client->irq, client); @@ -916,10 +1177,8 @@ static int __devexit ds1307_remove(struct i2c_client *client) } if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags)) - sysfs_remove_bin_file(&client->dev.kobj, &nvram); + sysfs_remove_bin_file(&client->dev.kobj, ds1307->nvram); - rtc_device_unregister(ds1307->rtc); - kfree(ds1307); return 0; } @@ -929,21 +1188,11 @@ static struct i2c_driver ds1307_driver = { .owner = THIS_MODULE, }, .probe = ds1307_probe, - .remove = __devexit_p(ds1307_remove), + .remove = ds1307_remove, .id_table = ds1307_id, }; -static int __init ds1307_init(void) -{ - return i2c_add_driver(&ds1307_driver); -} -module_init(ds1307_init); - -static void __exit ds1307_exit(void) -{ - i2c_del_driver(&ds1307_driver); -} -module_exit(ds1307_exit); +module_i2c_driver(ds1307_driver); MODULE_DESCRIPTION("RTC driver for DS1307 and similar chips"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c new file mode 100644 index 00000000000..c3719189dd9 --- /dev/null +++ b/drivers/rtc/rtc-ds1343.c @@ -0,0 +1,689 @@ +/* rtc-ds1343.c + * + * Driver for Dallas Semiconductor DS1343 Low Current, SPI Compatible + * Real Time Clock + * + * Author : Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/spi/spi.h> +#include <linux/regmap.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/pm.h> +#include <linux/slab.h> + +#define DS1343_DRV_VERSION "01.00" +#define DALLAS_MAXIM_DS1343 0 +#define DALLAS_MAXIM_DS1344 1 + +/* RTC DS1343 Registers */ +#define DS1343_SECONDS_REG 0x00 +#define DS1343_MINUTES_REG 0x01 +#define DS1343_HOURS_REG 0x02 +#define DS1343_DAY_REG 0x03 +#define DS1343_DATE_REG 0x04 +#define DS1343_MONTH_REG 0x05 +#define DS1343_YEAR_REG 0x06 +#define DS1343_ALM0_SEC_REG 0x07 +#define DS1343_ALM0_MIN_REG 0x08 +#define DS1343_ALM0_HOUR_REG 0x09 +#define DS1343_ALM0_DAY_REG 0x0A +#define DS1343_ALM1_SEC_REG 0x0B +#define DS1343_ALM1_MIN_REG 0x0C +#define DS1343_ALM1_HOUR_REG 0x0D +#define DS1343_ALM1_DAY_REG 0x0E +#define DS1343_CONTROL_REG 0x0F +#define DS1343_STATUS_REG 0x10 +#define DS1343_TRICKLE_REG 0x11 + +/* DS1343 Control Registers bits */ +#define DS1343_EOSC 0x80 +#define DS1343_DOSF 0x20 +#define DS1343_EGFIL 0x10 +#define DS1343_SQW 0x08 +#define DS1343_INTCN 0x04 +#define DS1343_A1IE 0x02 +#define DS1343_A0IE 0x01 + +/* DS1343 Status Registers bits */ +#define DS1343_OSF 0x80 +#define DS1343_IRQF1 0x02 +#define DS1343_IRQF0 0x01 + +/* DS1343 Trickle Charger Registers bits */ +#define DS1343_TRICKLE_MAGIC 0xa0 +#define DS1343_TRICKLE_DS1 0x08 +#define DS1343_TRICKLE_1K 0x01 +#define DS1343_TRICKLE_2K 0x02 +#define DS1343_TRICKLE_4K 0x03 + +static const struct spi_device_id ds1343_id[] = { + { "ds1343", DALLAS_MAXIM_DS1343 }, + { "ds1344", DALLAS_MAXIM_DS1344 }, + { } +}; +MODULE_DEVICE_TABLE(spi, ds1343_id); + +struct ds1343_priv { + struct spi_device *spi; + struct rtc_device *rtc; + struct regmap *map; + struct mutex mutex; + unsigned int irqen; + int irq; + int alarm_sec; + int alarm_min; + int alarm_hour; + int alarm_mday; +}; + +static int ds1343_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { +#ifdef RTC_SET_CHARGE + case RTC_SET_CHARGE: + { + int val; + + if (copy_from_user(&val, (int __user *)arg, sizeof(int))) + return -EFAULT; + + return regmap_write(priv->map, DS1343_TRICKLE_REG, val); + } + break; +#endif + } + + return -ENOIOCTLCMD; +} + +static ssize_t ds1343_show_glitchfilter(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int glitch_filt_status, data; + + regmap_read(priv->map, DS1343_CONTROL_REG, &data); + + glitch_filt_status = !!(data & DS1343_EGFIL); + + if (glitch_filt_status) + return sprintf(buf, "enabled\n"); + else + return sprintf(buf, "disabled\n"); +} + +static ssize_t ds1343_store_glitchfilter(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int data; + + regmap_read(priv->map, DS1343_CONTROL_REG, &data); + + if (strncmp(buf, "enabled", 7) == 0) + data |= DS1343_EGFIL; + + else if (strncmp(buf, "disabled", 8) == 0) + data &= ~(DS1343_EGFIL); + + else + return -EINVAL; + + regmap_write(priv->map, DS1343_CONTROL_REG, data); + + return count; +} + +static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter, + ds1343_store_glitchfilter); + +static ssize_t ds1343_show_alarmstatus(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int alarmstatus, data; + + regmap_read(priv->map, DS1343_CONTROL_REG, &data); + + alarmstatus = !!(data & DS1343_A0IE); + + if (alarmstatus) + return sprintf(buf, "enabled\n"); + else + return sprintf(buf, "disabled\n"); +} + +static DEVICE_ATTR(alarm_status, S_IRUGO, ds1343_show_alarmstatus, NULL); + +static ssize_t ds1343_show_alarmmode(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int alarm_mode, data; + char *alarm_str; + + regmap_read(priv->map, DS1343_ALM0_SEC_REG, &data); + alarm_mode = (data & 0x80) >> 4; + + regmap_read(priv->map, DS1343_ALM0_MIN_REG, &data); + alarm_mode |= (data & 0x80) >> 5; + + regmap_read(priv->map, DS1343_ALM0_HOUR_REG, &data); + alarm_mode |= (data & 0x80) >> 6; + + regmap_read(priv->map, DS1343_ALM0_DAY_REG, &data); + alarm_mode |= (data & 0x80) >> 7; + + switch (alarm_mode) { + case 15: + alarm_str = "each second"; + break; + + case 7: + alarm_str = "seconds match"; + break; + + case 3: + alarm_str = "minutes and seconds match"; + break; + + case 1: + alarm_str = "hours, minutes and seconds match"; + break; + + case 0: + alarm_str = "day, hours, minutes and seconds match"; + break; + + default: + alarm_str = "invalid"; + break; + } + + return sprintf(buf, "%s\n", alarm_str); +} + +static DEVICE_ATTR(alarm_mode, S_IRUGO, ds1343_show_alarmmode, NULL); + +static ssize_t ds1343_show_tricklecharger(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int data; + char *diodes = "disabled", *resistors = " "; + + regmap_read(priv->map, DS1343_TRICKLE_REG, &data); + + if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) { + switch (data & 0x0c) { + case DS1343_TRICKLE_DS1: + diodes = "one diode,"; + break; + + default: + diodes = "no diode,"; + break; + } + + switch (data & 0x03) { + case DS1343_TRICKLE_1K: + resistors = "1k Ohm"; + break; + + case DS1343_TRICKLE_2K: + resistors = "2k Ohm"; + break; + + case DS1343_TRICKLE_4K: + resistors = "4k Ohm"; + break; + + default: + diodes = "disabled"; + break; + } + } + + return sprintf(buf, "%s %s\n", diodes, resistors); +} + +static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL); + +static int ds1343_sysfs_register(struct device *dev) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int err; + + err = device_create_file(dev, &dev_attr_glitch_filter); + if (err) + return err; + + err = device_create_file(dev, &dev_attr_trickle_charger); + if (err) + goto error1; + + if (priv->irq <= 0) + return err; + + err = device_create_file(dev, &dev_attr_alarm_mode); + if (err) + goto error2; + + err = device_create_file(dev, &dev_attr_alarm_status); + if (!err) + return err; + + device_remove_file(dev, &dev_attr_alarm_mode); + +error2: + device_remove_file(dev, &dev_attr_trickle_charger); + +error1: + device_remove_file(dev, &dev_attr_glitch_filter); + + return err; +} + +static void ds1343_sysfs_unregister(struct device *dev) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + + device_remove_file(dev, &dev_attr_glitch_filter); + device_remove_file(dev, &dev_attr_trickle_charger); + + if (priv->irq <= 0) + return; + + device_remove_file(dev, &dev_attr_alarm_status); + device_remove_file(dev, &dev_attr_alarm_mode); +} + +static int ds1343_read_time(struct device *dev, struct rtc_time *dt) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + unsigned char buf[7]; + int res; + + res = regmap_bulk_read(priv->map, DS1343_SECONDS_REG, buf, 7); + if (res) + return res; + + dt->tm_sec = bcd2bin(buf[0]); + dt->tm_min = bcd2bin(buf[1]); + dt->tm_hour = bcd2bin(buf[2] & 0x3F); + dt->tm_wday = bcd2bin(buf[3]) - 1; + dt->tm_mday = bcd2bin(buf[4]); + dt->tm_mon = bcd2bin(buf[5] & 0x1F) - 1; + dt->tm_year = bcd2bin(buf[6]) + 100; /* year offset from 1900 */ + + return rtc_valid_tm(dt); +} + +static int ds1343_set_time(struct device *dev, struct rtc_time *dt) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int res; + + res = regmap_write(priv->map, DS1343_SECONDS_REG, + bin2bcd(dt->tm_sec)); + if (res) + return res; + + res = regmap_write(priv->map, DS1343_MINUTES_REG, + bin2bcd(dt->tm_min)); + if (res) + return res; + + res = regmap_write(priv->map, DS1343_HOURS_REG, + bin2bcd(dt->tm_hour) & 0x3F); + if (res) + return res; + + res = regmap_write(priv->map, DS1343_DAY_REG, + bin2bcd(dt->tm_wday + 1)); + if (res) + return res; + + res = regmap_write(priv->map, DS1343_DATE_REG, + bin2bcd(dt->tm_mday)); + if (res) + return res; + + res = regmap_write(priv->map, DS1343_MONTH_REG, + bin2bcd(dt->tm_mon + 1)); + if (res) + return res; + + dt->tm_year %= 100; + + res = regmap_write(priv->map, DS1343_YEAR_REG, + bin2bcd(dt->tm_year)); + if (res) + return res; + + return 0; +} + +static int ds1343_update_alarm(struct device *dev) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + unsigned int control, stat; + unsigned char buf[4]; + int res = 0; + + res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); + if (res) + return res; + + res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); + if (res) + return res; + + control &= ~(DS1343_A0IE); + stat &= ~(DS1343_IRQF0); + + res = regmap_write(priv->map, DS1343_CONTROL_REG, control); + if (res) + return res; + + res = regmap_write(priv->map, DS1343_STATUS_REG, stat); + if (res) + return res; + + buf[0] = priv->alarm_sec < 0 || (priv->irqen & RTC_UF) ? + 0x80 : bin2bcd(priv->alarm_sec) & 0x7F; + buf[1] = priv->alarm_min < 0 || (priv->irqen & RTC_UF) ? + 0x80 : bin2bcd(priv->alarm_min) & 0x7F; + buf[2] = priv->alarm_hour < 0 || (priv->irqen & RTC_UF) ? + 0x80 : bin2bcd(priv->alarm_hour) & 0x3F; + buf[3] = priv->alarm_mday < 0 || (priv->irqen & RTC_UF) ? + 0x80 : bin2bcd(priv->alarm_mday) & 0x7F; + + res = regmap_bulk_write(priv->map, DS1343_ALM0_SEC_REG, buf, 4); + if (res) + return res; + + if (priv->irqen) { + control |= DS1343_A0IE; + res = regmap_write(priv->map, DS1343_CONTROL_REG, control); + } + + return res; +} + +static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int res = 0; + unsigned int stat; + + if (priv->irq <= 0) + return -EINVAL; + + mutex_lock(&priv->mutex); + + res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); + if (res) + goto out; + + alarm->enabled = !!(priv->irqen & RTC_AF); + alarm->pending = !!(stat & DS1343_IRQF0); + + alarm->time.tm_sec = priv->alarm_sec < 0 ? 0 : priv->alarm_sec; + alarm->time.tm_min = priv->alarm_min < 0 ? 0 : priv->alarm_min; + alarm->time.tm_hour = priv->alarm_hour < 0 ? 0 : priv->alarm_hour; + alarm->time.tm_mday = priv->alarm_mday < 0 ? 0 : priv->alarm_mday; + + alarm->time.tm_mon = -1; + alarm->time.tm_year = -1; + alarm->time.tm_wday = -1; + alarm->time.tm_yday = -1; + alarm->time.tm_isdst = -1; + +out: + mutex_unlock(&priv->mutex); + return res; +} + +static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int res = 0; + + if (priv->irq <= 0) + return -EINVAL; + + mutex_lock(&priv->mutex); + + priv->alarm_sec = alarm->time.tm_sec; + priv->alarm_min = alarm->time.tm_min; + priv->alarm_hour = alarm->time.tm_hour; + priv->alarm_mday = alarm->time.tm_mday; + + if (alarm->enabled) + priv->irqen |= RTC_AF; + + res = ds1343_update_alarm(dev); + + mutex_unlock(&priv->mutex); + + return res; +} + +static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct ds1343_priv *priv = dev_get_drvdata(dev); + int res = 0; + + if (priv->irq <= 0) + return -EINVAL; + + mutex_lock(&priv->mutex); + + if (enabled) + priv->irqen |= RTC_AF; + else + priv->irqen &= ~RTC_AF; + + res = ds1343_update_alarm(dev); + + mutex_unlock(&priv->mutex); + + return res; +} + +static irqreturn_t ds1343_thread(int irq, void *dev_id) +{ + struct ds1343_priv *priv = dev_id; + unsigned int stat, control; + int res = 0; + + mutex_lock(&priv->mutex); + + res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); + if (res) + goto out; + + if (stat & DS1343_IRQF0) { + stat &= ~DS1343_IRQF0; + regmap_write(priv->map, DS1343_STATUS_REG, stat); + + res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); + if (res) + goto out; + + control &= ~DS1343_A0IE; + regmap_write(priv->map, DS1343_CONTROL_REG, control); + + rtc_update_irq(priv->rtc, 1, RTC_AF | RTC_IRQF); + } + +out: + mutex_unlock(&priv->mutex); + return IRQ_HANDLED; +} + +static const struct rtc_class_ops ds1343_rtc_ops = { + .ioctl = ds1343_ioctl, + .read_time = ds1343_read_time, + .set_time = ds1343_set_time, + .read_alarm = ds1343_read_alarm, + .set_alarm = ds1343_set_alarm, + .alarm_irq_enable = ds1343_alarm_irq_enable, +}; + +static int ds1343_probe(struct spi_device *spi) +{ + struct ds1343_priv *priv; + struct regmap_config config; + unsigned int data; + int res; + + memset(&config, 0, sizeof(config)); + config.reg_bits = 8; + config.val_bits = 8; + config.write_flag_mask = 0x80; + + priv = devm_kzalloc(&spi->dev, sizeof(struct ds1343_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->spi = spi; + mutex_init(&priv->mutex); + + /* RTC DS1347 works in spi mode 3 and + * its chip select is active high + */ + spi->mode = SPI_MODE_3 | SPI_CS_HIGH; + spi->bits_per_word = 8; + res = spi_setup(spi); + if (res) + return res; + + spi_set_drvdata(spi, priv); + + priv->map = devm_regmap_init_spi(spi, &config); + + if (IS_ERR(priv->map)) { + dev_err(&spi->dev, "spi regmap init failed for rtc ds1343\n"); + return PTR_ERR(priv->map); + } + + res = regmap_read(priv->map, DS1343_SECONDS_REG, &data); + if (res) + return res; + + regmap_read(priv->map, DS1343_CONTROL_REG, &data); + data |= DS1343_INTCN; + data &= ~(DS1343_EOSC | DS1343_A1IE | DS1343_A0IE); + regmap_write(priv->map, DS1343_CONTROL_REG, data); + + regmap_read(priv->map, DS1343_STATUS_REG, &data); + data &= ~(DS1343_OSF | DS1343_IRQF1 | DS1343_IRQF0); + regmap_write(priv->map, DS1343_STATUS_REG, data); + + priv->rtc = devm_rtc_device_register(&spi->dev, "ds1343", + &ds1343_rtc_ops, THIS_MODULE); + if (IS_ERR(priv->rtc)) { + dev_err(&spi->dev, "unable to register rtc ds1343\n"); + return PTR_ERR(priv->rtc); + } + + priv->irq = spi->irq; + + if (priv->irq >= 0) { + res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, + ds1343_thread, + IRQF_NO_SUSPEND | IRQF_ONESHOT, + "ds1343", priv); + if (res) { + priv->irq = -1; + dev_err(&spi->dev, + "unable to request irq for rtc ds1343\n"); + } else { + device_set_wakeup_capable(&spi->dev, 1); + } + } + + res = ds1343_sysfs_register(&spi->dev); + if (res) + dev_err(&spi->dev, + "unable to create sysfs entries for rtc ds1343\n"); + + return 0; +} + +static int ds1343_remove(struct spi_device *spi) +{ + struct ds1343_priv *priv = spi_get_drvdata(spi); + + if (spi->irq) { + mutex_lock(&priv->mutex); + priv->irqen &= ~RTC_AF; + mutex_unlock(&priv->mutex); + + devm_free_irq(&spi->dev, spi->irq, priv); + } + + spi_set_drvdata(spi, NULL); + + ds1343_sysfs_unregister(&spi->dev); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP + +static int ds1343_suspend(struct device *dev) +{ + struct spi_device *spi = to_spi_device(dev); + + if (spi->irq >= 0 && device_may_wakeup(dev)) + enable_irq_wake(spi->irq); + + return 0; +} + +static int ds1343_resume(struct device *dev) +{ + struct spi_device *spi = to_spi_device(dev); + + if (spi->irq >= 0 && device_may_wakeup(dev)) + disable_irq_wake(spi->irq); + + return 0; +} + +#endif + +static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume); + +static struct spi_driver ds1343_driver = { + .driver = { + .name = "ds1343", + .owner = THIS_MODULE, + .pm = &ds1343_pm, + }, + .probe = ds1343_probe, + .remove = ds1343_remove, + .id_table = ds1343_id, +}; + +module_spi_driver(ds1343_driver); + +MODULE_DESCRIPTION("DS1343 RTC SPI Driver"); +MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(DS1343_DRV_VERSION); diff --git a/drivers/rtc/rtc-ds1347.c b/drivers/rtc/rtc-ds1347.c new file mode 100644 index 00000000000..c82b4c05032 --- /dev/null +++ b/drivers/rtc/rtc-ds1347.c @@ -0,0 +1,166 @@ +/* rtc-ds1347.c + * + * Driver for Dallas Semiconductor DS1347 Low Current, SPI Compatible + * Real Time Clock + * + * Author : Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/spi/spi.h> +#include <linux/bcd.h> + +/* Registers in ds1347 rtc */ + +#define DS1347_SECONDS_REG 0x01 +#define DS1347_MINUTES_REG 0x03 +#define DS1347_HOURS_REG 0x05 +#define DS1347_DATE_REG 0x07 +#define DS1347_MONTH_REG 0x09 +#define DS1347_DAY_REG 0x0B +#define DS1347_YEAR_REG 0x0D +#define DS1347_CONTROL_REG 0x0F +#define DS1347_STATUS_REG 0x17 +#define DS1347_CLOCK_BURST 0x3F + +static int ds1347_read_reg(struct device *dev, unsigned char address, + unsigned char *data) +{ + struct spi_device *spi = to_spi_device(dev); + + *data = address | 0x80; + + return spi_write_then_read(spi, data, 1, data, 1); +} + +static int ds1347_write_reg(struct device *dev, unsigned char address, + unsigned char data) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char buf[2]; + + buf[0] = address & 0x7F; + buf[1] = data; + + return spi_write_then_read(spi, buf, 2, NULL, 0); +} + +static int ds1347_read_time(struct device *dev, struct rtc_time *dt) +{ + struct spi_device *spi = to_spi_device(dev); + int err; + unsigned char buf[8]; + + buf[0] = DS1347_CLOCK_BURST | 0x80; + + err = spi_write_then_read(spi, buf, 1, buf, 8); + if (err) + return err; + + dt->tm_sec = bcd2bin(buf[0]); + dt->tm_min = bcd2bin(buf[1]); + dt->tm_hour = bcd2bin(buf[2] & 0x3F); + dt->tm_mday = bcd2bin(buf[3]); + dt->tm_mon = bcd2bin(buf[4]) - 1; + dt->tm_wday = bcd2bin(buf[5]) - 1; + dt->tm_year = bcd2bin(buf[6]) + 100; + + return rtc_valid_tm(dt); +} + +static int ds1347_set_time(struct device *dev, struct rtc_time *dt) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char buf[9]; + + buf[0] = DS1347_CLOCK_BURST & 0x7F; + buf[1] = bin2bcd(dt->tm_sec); + buf[2] = bin2bcd(dt->tm_min); + buf[3] = (bin2bcd(dt->tm_hour) & 0x3F); + buf[4] = bin2bcd(dt->tm_mday); + buf[5] = bin2bcd(dt->tm_mon + 1); + buf[6] = bin2bcd(dt->tm_wday + 1); + + /* year in linux is from 1900 i.e in range of 100 + in rtc it is from 00 to 99 */ + dt->tm_year = dt->tm_year % 100; + + buf[7] = bin2bcd(dt->tm_year); + buf[8] = bin2bcd(0x00); + + /* write the rtc settings */ + return spi_write_then_read(spi, buf, 9, NULL, 0); +} + +static const struct rtc_class_ops ds1347_rtc_ops = { + .read_time = ds1347_read_time, + .set_time = ds1347_set_time, +}; + +static int ds1347_probe(struct spi_device *spi) +{ + struct rtc_device *rtc; + unsigned char data; + int res; + + /* spi setup with ds1347 in mode 3 and bits per word as 8 */ + spi->mode = SPI_MODE_3; + spi->bits_per_word = 8; + spi_setup(spi); + + /* RTC Settings */ + res = ds1347_read_reg(&spi->dev, DS1347_SECONDS_REG, &data); + if (res) + return res; + + /* Disable the write protect of rtc */ + ds1347_read_reg(&spi->dev, DS1347_CONTROL_REG, &data); + data = data & ~(1<<7); + ds1347_write_reg(&spi->dev, DS1347_CONTROL_REG, data); + + /* Enable the oscillator , disable the oscillator stop flag, + and glitch filter to reduce current consumption */ + ds1347_read_reg(&spi->dev, DS1347_STATUS_REG, &data); + data = data & 0x1B; + ds1347_write_reg(&spi->dev, DS1347_STATUS_REG, data); + + /* display the settings */ + ds1347_read_reg(&spi->dev, DS1347_CONTROL_REG, &data); + dev_info(&spi->dev, "DS1347 RTC CTRL Reg = 0x%02x\n", data); + + ds1347_read_reg(&spi->dev, DS1347_STATUS_REG, &data); + dev_info(&spi->dev, "DS1347 RTC Status Reg = 0x%02x\n", data); + + rtc = devm_rtc_device_register(&spi->dev, "ds1347", + &ds1347_rtc_ops, THIS_MODULE); + + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + spi_set_drvdata(spi, rtc); + + return 0; +} + +static struct spi_driver ds1347_driver = { + .driver = { + .name = "ds1347", + .owner = THIS_MODULE, + }, + .probe = ds1347_probe, +}; + +module_spi_driver(ds1347_driver); + +MODULE_DESCRIPTION("DS1347 SPI RTC DRIVER"); +MODULE_AUTHOR("Raghavendra C Ganiga <ravi23ganiga@gmail.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c index 1f0007fd443..9e6e14fb53d 100644 --- a/drivers/rtc/rtc-ds1374.c +++ b/drivers/rtc/rtc-ds1374.c @@ -25,6 +25,7 @@ #include <linux/bcd.h> #include <linux/workqueue.h> #include <linux/slab.h> +#include <linux/pm.h> #define DS1374_REG_TOD0 0x00 /* Time of Day */ #define DS1374_REG_TOD1 0x01 @@ -64,7 +65,7 @@ struct ds1374 { static struct i2c_driver ds1374_driver; static int ds1374_read_rtc(struct i2c_client *client, u32 *time, - int reg, int nbytes) + int reg, int nbytes) { u8 buf[4]; int ret; @@ -89,7 +90,7 @@ static int ds1374_read_rtc(struct i2c_client *client, u32 *time, } static int ds1374_write_rtc(struct i2c_client *client, u32 time, - int reg, int nbytes) + int reg, int nbytes) { u8 buf[4]; int i; @@ -118,8 +119,7 @@ static int ds1374_check_rtc_status(struct i2c_client *client) if (stat & DS1374_REG_SR_OSF) dev_warn(&client->dev, - "oscillator discontinuity flagged, " - "time unreliable\n"); + "oscillator discontinuity flagged, time unreliable\n"); stat &= ~(DS1374_REG_SR_OSF | DS1374_REG_SR_AF); @@ -307,42 +307,25 @@ unlock: mutex_unlock(&ds1374->mutex); } -static int ds1374_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +static int ds1374_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct i2c_client *client = to_i2c_client(dev); struct ds1374 *ds1374 = i2c_get_clientdata(client); - int ret = -ENOIOCTLCMD; + int ret; mutex_lock(&ds1374->mutex); - switch (cmd) { - case RTC_AIE_OFF: - ret = i2c_smbus_read_byte_data(client, DS1374_REG_CR); - if (ret < 0) - goto out; - - ret &= ~DS1374_REG_CR_WACE; - - ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, ret); - if (ret < 0) - goto out; - - break; - - case RTC_AIE_ON: - ret = i2c_smbus_read_byte_data(client, DS1374_REG_CR); - if (ret < 0) - goto out; + ret = i2c_smbus_read_byte_data(client, DS1374_REG_CR); + if (ret < 0) + goto out; + if (enabled) { ret |= DS1374_REG_CR_WACE | DS1374_REG_CR_AIE; ret &= ~DS1374_REG_CR_WDALM; - - ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, ret); - if (ret < 0) - goto out; - - break; + } else { + ret &= ~DS1374_REG_CR_WACE; } + ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, ret); out: mutex_unlock(&ds1374->mutex); @@ -354,7 +337,7 @@ static const struct rtc_class_ops ds1374_rtc_ops = { .set_time = ds1374_set_time, .read_alarm = ds1374_read_alarm, .set_alarm = ds1374_set_alarm, - .ioctl = ds1374_ioctl, + .alarm_irq_enable = ds1374_alarm_irq_enable, }; static int ds1374_probe(struct i2c_client *client, @@ -363,7 +346,7 @@ static int ds1374_probe(struct i2c_client *client, struct ds1374 *ds1374; int ret; - ds1374 = kzalloc(sizeof(struct ds1374), GFP_KERNEL); + ds1374 = devm_kzalloc(&client->dev, sizeof(struct ds1374), GFP_KERNEL); if (!ds1374) return -ENOMEM; @@ -375,39 +358,30 @@ static int ds1374_probe(struct i2c_client *client, ret = ds1374_check_rtc_status(client); if (ret) - goto out_free; + return ret; if (client->irq > 0) { - ret = request_irq(client->irq, ds1374_irq, 0, - "ds1374", client); + ret = devm_request_irq(&client->dev, client->irq, ds1374_irq, 0, + "ds1374", client); if (ret) { dev_err(&client->dev, "unable to request IRQ\n"); - goto out_free; + return ret; } device_set_wakeup_capable(&client->dev, 1); } - ds1374->rtc = rtc_device_register(client->name, &client->dev, - &ds1374_rtc_ops, THIS_MODULE); + ds1374->rtc = devm_rtc_device_register(&client->dev, client->name, + &ds1374_rtc_ops, THIS_MODULE); if (IS_ERR(ds1374->rtc)) { - ret = PTR_ERR(ds1374->rtc); dev_err(&client->dev, "unable to register the class device\n"); - goto out_irq; + return PTR_ERR(ds1374->rtc); } return 0; - -out_irq: - if (client->irq > 0) - free_irq(client->irq, client); - -out_free: - kfree(ds1374); - return ret; } -static int __devexit ds1374_remove(struct i2c_client *client) +static int ds1374_remove(struct i2c_client *client) { struct ds1374 *ds1374 = i2c_get_clientdata(client); @@ -416,58 +390,47 @@ static int __devexit ds1374_remove(struct i2c_client *client) ds1374->exiting = 1; mutex_unlock(&ds1374->mutex); - free_irq(client->irq, client); - flush_scheduled_work(); + devm_free_irq(&client->dev, client->irq, client); + cancel_work_sync(&ds1374->work); } - rtc_device_unregister(ds1374->rtc); - kfree(ds1374); return 0; } -#ifdef CONFIG_PM -static int ds1374_suspend(struct i2c_client *client, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int ds1374_suspend(struct device *dev) { + struct i2c_client *client = to_i2c_client(dev); + if (client->irq >= 0 && device_may_wakeup(&client->dev)) enable_irq_wake(client->irq); return 0; } -static int ds1374_resume(struct i2c_client *client) +static int ds1374_resume(struct device *dev) { + struct i2c_client *client = to_i2c_client(dev); + if (client->irq >= 0 && device_may_wakeup(&client->dev)) disable_irq_wake(client->irq); return 0; } -#else -#define ds1374_suspend NULL -#define ds1374_resume NULL #endif +static SIMPLE_DEV_PM_OPS(ds1374_pm, ds1374_suspend, ds1374_resume); + static struct i2c_driver ds1374_driver = { .driver = { .name = "rtc-ds1374", .owner = THIS_MODULE, + .pm = &ds1374_pm, }, .probe = ds1374_probe, - .suspend = ds1374_suspend, - .resume = ds1374_resume, - .remove = __devexit_p(ds1374_remove), + .remove = ds1374_remove, .id_table = ds1374_id, }; -static int __init ds1374_init(void) -{ - return i2c_add_driver(&ds1374_driver); -} - -static void __exit ds1374_exit(void) -{ - i2c_del_driver(&ds1374_driver); -} - -module_init(ds1374_init); -module_exit(ds1374_exit); +module_i2c_driver(ds1374_driver); MODULE_AUTHOR("Scott Wood <scottwood@freescale.com>"); MODULE_DESCRIPTION("Maxim/Dallas DS1374 RTC Driver"); diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c index 26a86d23505..e67bfcb3a1a 100644 --- a/drivers/rtc/rtc-ds1390.c +++ b/drivers/rtc/rtc-ds1390.c @@ -121,7 +121,7 @@ static const struct rtc_class_ops ds1390_rtc_ops = { .set_time = ds1390_set_time, }; -static int __devinit ds1390_probe(struct spi_device *spi) +static int ds1390_probe(struct spi_device *spi) { unsigned char tmp; struct ds1390 *chip; @@ -131,61 +131,37 @@ static int __devinit ds1390_probe(struct spi_device *spi) spi->bits_per_word = 8; spi_setup(spi); - chip = kzalloc(sizeof *chip, GFP_KERNEL); - if (!chip) { - dev_err(&spi->dev, "unable to allocate device memory\n"); + chip = devm_kzalloc(&spi->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) return -ENOMEM; - } - dev_set_drvdata(&spi->dev, chip); + + spi_set_drvdata(spi, chip); res = ds1390_get_reg(&spi->dev, DS1390_REG_SECONDS, &tmp); if (res != 0) { dev_err(&spi->dev, "unable to read device\n"); - kfree(chip); return res; } - chip->rtc = rtc_device_register("ds1390", - &spi->dev, &ds1390_rtc_ops, THIS_MODULE); + chip->rtc = devm_rtc_device_register(&spi->dev, "ds1390", + &ds1390_rtc_ops, THIS_MODULE); if (IS_ERR(chip->rtc)) { dev_err(&spi->dev, "unable to register device\n"); res = PTR_ERR(chip->rtc); - kfree(chip); } return res; } -static int __devexit ds1390_remove(struct spi_device *spi) -{ - struct ds1390 *chip = platform_get_drvdata(spi); - - rtc_device_unregister(chip->rtc); - kfree(chip); - - return 0; -} - static struct spi_driver ds1390_driver = { .driver = { .name = "rtc-ds1390", .owner = THIS_MODULE, }, .probe = ds1390_probe, - .remove = __devexit_p(ds1390_remove), }; -static __init int ds1390_init(void) -{ - return spi_register_driver(&ds1390_driver); -} -module_init(ds1390_init); - -static __exit void ds1390_exit(void) -{ - spi_unregister_driver(&ds1390_driver); -} -module_exit(ds1390_exit); +module_spi_driver(ds1390_driver); MODULE_DESCRIPTION("Dallas/Maxim DS1390/93/94 SPI RTC driver"); MODULE_AUTHOR("Mark Jackson <mpfj@mimc.co.uk>"); diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c index 37268e97de4..b13d1399b81 100644 --- a/drivers/rtc/rtc-ds1511.c +++ b/drivers/rtc/rtc-ds1511.c @@ -23,6 +23,7 @@ #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/module.h> #define DRV_VERSION "0.6" @@ -88,7 +89,6 @@ enum ds1511reg { struct rtc_plat_data { struct rtc_device *rtc; void __iomem *ioaddr; /* virtual base address */ - int size; /* amount of memory mapped */ int irq; unsigned int irqen; int alrm_sec; @@ -103,31 +103,31 @@ static DEFINE_SPINLOCK(ds1511_lock); static __iomem char *ds1511_base; static u32 reg_spacing = 1; - static noinline void +static noinline void rtc_write(uint8_t val, uint32_t reg) { writeb(val, ds1511_base + (reg * reg_spacing)); } - static inline void +static inline void rtc_write_alarm(uint8_t val, enum ds1511reg reg) { rtc_write((val | 0x80), reg); } - static noinline uint8_t +static noinline uint8_t rtc_read(enum ds1511reg reg) { return readb(ds1511_base + (reg * reg_spacing)); } - static inline void +static inline void rtc_disable_update(void) { rtc_write((rtc_read(RTC_CMD) & ~RTC_TE), RTC_CMD); } - static void +static void rtc_enable_update(void) { rtc_write((rtc_read(RTC_CMD) | RTC_TE), RTC_CMD); @@ -144,7 +144,7 @@ rtc_enable_update(void) * just enough code to set the watchdog timer so that it * will reboot the system */ - void +void ds1511_wdog_set(unsigned long deciseconds) { /* @@ -162,7 +162,7 @@ ds1511_wdog_set(unsigned long deciseconds) rtc_write(DS1511_WDE | DS1511_WDS, RTC_CMD); } - void +void ds1511_wdog_disable(void) { /* @@ -190,13 +190,12 @@ static int ds1511_rtc_set_time(struct device *dev, struct rtc_time *rtc_tm) /* * won't have to change this for a while */ - if (rtc_tm->tm_year < 1900) { + if (rtc_tm->tm_year < 1900) rtc_tm->tm_year += 1900; - } - if (rtc_tm->tm_year < 1970) { + if (rtc_tm->tm_year < 1970) return -EINVAL; - } + yrs = rtc_tm->tm_year % 100; cen = rtc_tm->tm_year / 100; mon = rtc_tm->tm_mon + 1; /* tm_mon starts at zero */ @@ -206,17 +205,14 @@ static int ds1511_rtc_set_time(struct device *dev, struct rtc_time *rtc_tm) min = rtc_tm->tm_min; sec = rtc_tm->tm_sec; - if ((mon > 12) || (day == 0)) { + if ((mon > 12) || (day == 0)) return -EINVAL; - } - if (day > rtc_month_days(rtc_tm->tm_mon, rtc_tm->tm_year)) { + if (day > rtc_month_days(rtc_tm->tm_mon, rtc_tm->tm_year)) return -EINVAL; - } - if ((hrs >= 24) || (min >= 60) || (sec >= 60)) { + if ((hrs >= 24) || (min >= 60) || (sec >= 60)) return -EINVAL; - } /* * each register is a different number of valid bits @@ -298,7 +294,7 @@ static int ds1511_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm) * date/hours/mins/secs matches. the ds1511 has many more * permutations, but the kernel doesn't. */ - static void +static void ds1511_rtc_update_alarm(struct rtc_plat_data *pdata) { unsigned long flags; @@ -321,7 +317,7 @@ ds1511_rtc_update_alarm(struct rtc_plat_data *pdata) spin_unlock_irqrestore(&pdata->lock, flags); } - static int +static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct platform_device *pdev = to_platform_device(dev); @@ -334,14 +330,14 @@ ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) pdata->alrm_hour = alrm->time.tm_hour; pdata->alrm_min = alrm->time.tm_min; pdata->alrm_sec = alrm->time.tm_sec; - if (alrm->enabled) { + if (alrm->enabled) pdata->irqen |= RTC_AF; - } + ds1511_rtc_update_alarm(pdata); return 0; } - static int +static int ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct platform_device *pdev = to_platform_device(dev); @@ -358,7 +354,7 @@ ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) return 0; } - static irqreturn_t +static irqreturn_t ds1511_interrupt(int irq, void *dev_id) { struct platform_device *pdev = dev_id; @@ -375,8 +371,7 @@ ds1511_interrupt(int irq, void *dev_id) events |= RTC_UF; else events |= RTC_AF; - if (likely(pdata->rtc)) - rtc_update_irq(pdata->rtc, 1, events); + rtc_update_irq(pdata->rtc, 1, events); } spin_unlock(&pdata->lock); return events ? IRQ_HANDLED : IRQ_NONE; @@ -397,32 +392,15 @@ static int ds1511_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int ds1511_rtc_update_irq_enable(struct device *dev, - unsigned int enabled) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_plat_data *pdata = platform_get_drvdata(pdev); - - if (pdata->irq <= 0) - return -EINVAL; - if (enabled) - pdata->irqen |= RTC_UF; - else - pdata->irqen &= ~RTC_UF; - ds1511_rtc_update_alarm(pdata); - return 0; -} - static const struct rtc_class_ops ds1511_rtc_ops = { .read_time = ds1511_rtc_read_time, .set_time = ds1511_rtc_set_time, .read_alarm = ds1511_rtc_read_alarm, .set_alarm = ds1511_rtc_set_alarm, .alarm_irq_enable = ds1511_rtc_alarm_irq_enable, - .update_irq_enable = ds1511_rtc_update_irq_enable, }; - static ssize_t +static ssize_t ds1511_nvram_read(struct file *filp, struct kobject *kobj, struct bin_attribute *ba, char *buf, loff_t pos, size_t size) @@ -433,26 +411,26 @@ ds1511_nvram_read(struct file *filp, struct kobject *kobj, * if count is more than one, turn on "burst" mode * turn it off when you're done */ - if (size > 1) { + if (size > 1) rtc_write((rtc_read(RTC_CMD) | DS1511_BME), RTC_CMD); - } - if (pos > DS1511_RAM_MAX) { + + if (pos > DS1511_RAM_MAX) pos = DS1511_RAM_MAX; - } - if (size + pos > DS1511_RAM_MAX + 1) { + + if (size + pos > DS1511_RAM_MAX + 1) size = DS1511_RAM_MAX - pos + 1; - } + rtc_write(pos, DS1511_RAMADDR_LSB); - for (count = 0; size > 0; count++, size--) { + for (count = 0; size > 0; count++, size--) *buf++ = rtc_read(DS1511_RAMDATA); - } - if (count > 1) { + + if (count > 1) rtc_write((rtc_read(RTC_CMD) & ~DS1511_BME), RTC_CMD); - } + return count; } - static ssize_t +static ssize_t ds1511_nvram_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t pos, size_t size) @@ -463,57 +441,49 @@ ds1511_nvram_write(struct file *filp, struct kobject *kobj, * if count is more than one, turn on "burst" mode * turn it off when you're done */ - if (size > 1) { + if (size > 1) rtc_write((rtc_read(RTC_CMD) | DS1511_BME), RTC_CMD); - } - if (pos > DS1511_RAM_MAX) { + + if (pos > DS1511_RAM_MAX) pos = DS1511_RAM_MAX; - } - if (size + pos > DS1511_RAM_MAX + 1) { + + if (size + pos > DS1511_RAM_MAX + 1) size = DS1511_RAM_MAX - pos + 1; - } + rtc_write(pos, DS1511_RAMADDR_LSB); - for (count = 0; size > 0; count++, size--) { + for (count = 0; size > 0; count++, size--) rtc_write(*buf++, DS1511_RAMDATA); - } - if (count > 1) { + + if (count > 1) rtc_write((rtc_read(RTC_CMD) & ~DS1511_BME), RTC_CMD); - } + return count; } static struct bin_attribute ds1511_nvram_attr = { .attr = { .name = "nvram", - .mode = S_IRUGO | S_IWUGO, + .mode = S_IRUGO | S_IWUSR, }, .size = DS1511_RAM_MAX, .read = ds1511_nvram_read, .write = ds1511_nvram_write, }; - static int __devinit -ds1511_rtc_probe(struct platform_device *pdev) +static int ds1511_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc; struct resource *res; struct rtc_plat_data *pdata; int ret = 0; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - return -ENODEV; - } pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - pdata->size = res->end - res->start + 1; - if (!devm_request_mem_region(&pdev->dev, res->start, pdata->size, - pdev->name)) - return -EBUSY; - ds1511_base = devm_ioremap(&pdev->dev, res->start, pdata->size); - if (!ds1511_base) - return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ds1511_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ds1511_base)) + return PTR_ERR(ds1511_base); pdata->ioaddr = ds1511_base; pdata->irq = platform_get_irq(pdev, 0); @@ -535,12 +505,17 @@ ds1511_rtc_probe(struct platform_device *pdev) /* * check for a dying bat-tree */ - if (rtc_read(RTC_CMD1) & DS1511_BLF1) { + if (rtc_read(RTC_CMD1) & DS1511_BLF1) dev_warn(&pdev->dev, "voltage-low detected.\n"); - } spin_lock_init(&pdata->lock); platform_set_drvdata(pdev, pdata); + + pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &ds1511_rtc_ops, THIS_MODULE); + if (IS_ERR(pdata->rtc)) + return PTR_ERR(pdata->rtc); + /* * if the platform has an interrupt in mind for this device, * then by all means, set it @@ -548,32 +523,26 @@ ds1511_rtc_probe(struct platform_device *pdev) if (pdata->irq > 0) { rtc_read(RTC_CMD1); if (devm_request_irq(&pdev->dev, pdata->irq, ds1511_interrupt, - IRQF_DISABLED | IRQF_SHARED, pdev->name, pdev) < 0) { + IRQF_SHARED, pdev->name, pdev) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = 0; } } - rtc = rtc_device_register(pdev->name, &pdev->dev, &ds1511_rtc_ops, - THIS_MODULE); - if (IS_ERR(rtc)) - return PTR_ERR(rtc); - pdata->rtc = rtc; - ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr); if (ret) - rtc_device_unregister(pdata->rtc); - return ret; + dev_err(&pdev->dev, "Unable to create sysfs entry: %s\n", + ds1511_nvram_attr.attr.name); + + return 0; } - static int __devexit -ds1511_rtc_remove(struct platform_device *pdev) +static int ds1511_rtc_remove(struct platform_device *pdev) { struct rtc_plat_data *pdata = platform_get_drvdata(pdev); sysfs_remove_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr); - rtc_device_unregister(pdata->rtc); if (pdata->irq > 0) { /* * disable the alarm interrupt @@ -589,27 +558,14 @@ MODULE_ALIAS("platform:ds1511"); static struct platform_driver ds1511_rtc_driver = { .probe = ds1511_rtc_probe, - .remove = __devexit_p(ds1511_rtc_remove), + .remove = ds1511_rtc_remove, .driver = { .name = "ds1511", .owner = THIS_MODULE, }, }; - static int __init -ds1511_rtc_init(void) -{ - return platform_driver_register(&ds1511_rtc_driver); -} - - static void __exit -ds1511_rtc_exit(void) -{ - platform_driver_unregister(&ds1511_rtc_driver); -} - -module_init(ds1511_rtc_init); -module_exit(ds1511_rtc_exit); +module_platform_driver(ds1511_rtc_driver); MODULE_AUTHOR("Andrew Sharp <andy.sharp@lsi.com>"); MODULE_DESCRIPTION("Dallas DS1511 RTC driver"); diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c index ff432e2ca27..ab56893aac7 100644 --- a/drivers/rtc/rtc-ds1553.c +++ b/drivers/rtc/rtc-ds1553.c @@ -18,6 +18,7 @@ #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/module.h> #define DRV_VERSION "0.3" @@ -205,8 +206,7 @@ static irqreturn_t ds1553_rtc_interrupt(int irq, void *dev_id) events |= RTC_UF; else events |= RTC_AF; - if (likely(pdata->rtc)) - rtc_update_irq(pdata->rtc, 1, events); + rtc_update_irq(pdata->rtc, 1, events); } spin_unlock(&pdata->lock); return events ? IRQ_HANDLED : IRQ_NONE; @@ -227,29 +227,12 @@ static int ds1553_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int ds1553_rtc_update_irq_enable(struct device *dev, - unsigned int enabled) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_plat_data *pdata = platform_get_drvdata(pdev); - - if (pdata->irq <= 0) - return -EINVAL; - if (enabled) - pdata->irqen |= RTC_UF; - else - pdata->irqen &= ~RTC_UF; - ds1553_rtc_update_alarm(pdata); - return 0; -} - static const struct rtc_class_ops ds1553_rtc_ops = { .read_time = ds1553_rtc_read_time, .set_time = ds1553_rtc_set_time, .read_alarm = ds1553_rtc_read_alarm, .set_alarm = ds1553_rtc_set_alarm, .alarm_irq_enable = ds1553_rtc_alarm_irq_enable, - .update_irq_enable = ds1553_rtc_update_irq_enable, }; static ssize_t ds1553_nvram_read(struct file *filp, struct kobject *kobj, @@ -292,28 +275,22 @@ static struct bin_attribute ds1553_nvram_attr = { .write = ds1553_nvram_write, }; -static int __devinit ds1553_rtc_probe(struct platform_device *pdev) +static int ds1553_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc; struct resource *res; unsigned int cen, sec; struct rtc_plat_data *pdata; void __iomem *ioaddr; int ret = 0; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - if (!devm_request_mem_region(&pdev->dev, res->start, RTC_REG_SIZE, - pdev->name)) - return -EBUSY; - ioaddr = devm_ioremap(&pdev->dev, res->start, RTC_REG_SIZE); - if (!ioaddr) - return -ENOMEM; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ioaddr)) + return PTR_ERR(ioaddr); pdata->ioaddr = ioaddr; pdata->irq = platform_get_irq(pdev, 0); @@ -332,34 +309,35 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev) spin_lock_init(&pdata->lock); pdata->last_jiffies = jiffies; platform_set_drvdata(pdev, pdata); + + pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &ds1553_rtc_ops, THIS_MODULE); + if (IS_ERR(pdata->rtc)) + return PTR_ERR(pdata->rtc); + if (pdata->irq > 0) { writeb(0, ioaddr + RTC_INTERRUPTS); if (devm_request_irq(&pdev->dev, pdata->irq, ds1553_rtc_interrupt, - IRQF_DISABLED, pdev->name, pdev) < 0) { + 0, pdev->name, pdev) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = 0; } } - rtc = rtc_device_register(pdev->name, &pdev->dev, - &ds1553_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) - return PTR_ERR(rtc); - pdata->rtc = rtc; - ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr); if (ret) - rtc_device_unregister(rtc); - return ret; + dev_err(&pdev->dev, "unable to create sysfs file: %s\n", + ds1553_nvram_attr.attr.name); + + return 0; } -static int __devexit ds1553_rtc_remove(struct platform_device *pdev) +static int ds1553_rtc_remove(struct platform_device *pdev) { struct rtc_plat_data *pdata = platform_get_drvdata(pdev); sysfs_remove_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr); - rtc_device_unregister(pdata->rtc); if (pdata->irq > 0) writeb(0, pdata->ioaddr + RTC_INTERRUPTS); return 0; @@ -370,25 +348,14 @@ MODULE_ALIAS("platform:rtc-ds1553"); static struct platform_driver ds1553_rtc_driver = { .probe = ds1553_rtc_probe, - .remove = __devexit_p(ds1553_rtc_remove), + .remove = ds1553_rtc_remove, .driver = { .name = "rtc-ds1553", .owner = THIS_MODULE, }, }; -static __init int ds1553_init(void) -{ - return platform_driver_register(&ds1553_rtc_driver); -} - -static __exit void ds1553_exit(void) -{ - platform_driver_unregister(&ds1553_rtc_driver); -} - -module_init(ds1553_init); -module_exit(ds1553_exit); +module_platform_driver(ds1553_rtc_driver); MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>"); MODULE_DESCRIPTION("Dallas DS1553 RTC driver"); diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c index 06dfb54f99b..a4888dbca2e 100644 --- a/drivers/rtc/rtc-ds1672.c +++ b/drivers/rtc/rtc-ds1672.c @@ -11,6 +11,7 @@ #include <linux/i2c.h> #include <linux/rtc.h> +#include <linux/module.h> #define DRV_VERSION "0.4" @@ -36,8 +37,17 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm) unsigned char buf[4]; struct i2c_msg msgs[] = { - {client->addr, 0, 1, &addr}, /* setup read ptr */ - {client->addr, I2C_M_RD, 4, buf}, /* read date */ + {/* setup read ptr */ + .addr = client->addr, + .len = 1, + .buf = &addr + }, + {/* read date */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 4, + .buf = buf + }, }; /* read date registers */ @@ -98,8 +108,17 @@ static int ds1672_get_control(struct i2c_client *client, u8 *status) unsigned char addr = DS1672_REG_CONTROL; struct i2c_msg msgs[] = { - {client->addr, 0, 1, &addr}, /* setup read ptr */ - {client->addr, I2C_M_RD, 1, status}, /* read control */ + {/* setup read ptr */ + .addr = client->addr, + .len = 1, + .buf = &addr + }, + {/* read control */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = status + }, }; /* read control register */ @@ -134,16 +153,6 @@ static const struct rtc_class_ops ds1672_rtc_ops = { .set_mmss = ds1672_rtc_set_mmss, }; -static int ds1672_remove(struct i2c_client *client) -{ - struct rtc_device *rtc = i2c_get_clientdata(client); - - if (rtc) - rtc_device_unregister(rtc); - - return 0; -} - static int ds1672_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -158,7 +167,7 @@ static int ds1672_probe(struct i2c_client *client, dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); - rtc = rtc_device_register(ds1672_driver.driver.name, &client->dev, + rtc = devm_rtc_device_register(&client->dev, ds1672_driver.driver.name, &ds1672_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) @@ -168,8 +177,9 @@ static int ds1672_probe(struct i2c_client *client, /* read control register */ err = ds1672_get_control(client, &control); - if (err) - goto exit_devreg; + if (err) { + dev_warn(&client->dev, "Unable to read the control register\n"); + } if (control & DS1672_REG_CONTROL_EOSC) dev_warn(&client->dev, "Oscillator not enabled. " @@ -178,13 +188,10 @@ static int ds1672_probe(struct i2c_client *client, /* Register sysfs hooks */ err = device_create_file(&client->dev, &dev_attr_control); if (err) - goto exit_devreg; + dev_err(&client->dev, "Unable to create sysfs entry: %s\n", + dev_attr_control.attr.name); return 0; - - exit_devreg: - rtc_device_unregister(rtc); - return err; } static struct i2c_device_id ds1672_id[] = { @@ -197,24 +204,12 @@ static struct i2c_driver ds1672_driver = { .name = "rtc-ds1672", }, .probe = &ds1672_probe, - .remove = &ds1672_remove, .id_table = ds1672_id, }; -static int __init ds1672_init(void) -{ - return i2c_add_driver(&ds1672_driver); -} - -static void __exit ds1672_exit(void) -{ - i2c_del_driver(&ds1672_driver); -} +module_i2c_driver(ds1672_driver); MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); MODULE_DESCRIPTION("Dallas/Maxim DS1672 timekeeper driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(ds1672_init); -module_exit(ds1672_exit); diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c index 042630c90dd..c6b2191a412 100644 --- a/drivers/rtc/rtc-ds1742.c +++ b/drivers/rtc/rtc-ds1742.c @@ -13,14 +13,16 @@ */ #include <linux/bcd.h> -#include <linux/init.h> #include <linux/kernel.h> #include <linux/gfp.h> #include <linux/delay.h> #include <linux/jiffies.h> #include <linux/rtc.h> +#include <linux/of.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/module.h> #define DRV_VERSION "0.4" @@ -51,11 +53,9 @@ #define RTC_BATT_FLAG 0x80 struct rtc_plat_data { - struct rtc_device *rtc; void __iomem *ioaddr_nvram; void __iomem *ioaddr_rtc; size_t size_nvram; - size_t size; unsigned long last_jiffies; struct bin_attribute nvram_attr; }; @@ -116,11 +116,7 @@ static int ds1742_rtc_read_time(struct device *dev, struct rtc_time *tm) /* year is 1900 + tm->tm_year */ tm->tm_year = bcd2bin(year) + bcd2bin(century) * 100 - 1900; - if (rtc_valid_tm(tm) < 0) { - dev_err(dev, "retrieved date/time is not valid.\n"); - rtc_time_to_tm(0, tm); - } - return 0; + return rtc_valid_tm(tm); } static const struct rtc_class_ops ds1742_rtc_ops = { @@ -158,7 +154,7 @@ static ssize_t ds1742_nvram_write(struct file *filp, struct kobject *kobj, return count; } -static int __devinit ds1742_rtc_probe(struct platform_device *pdev) +static int ds1742_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; struct resource *res; @@ -167,22 +163,17 @@ static int __devinit ds1742_rtc_probe(struct platform_device *pdev) void __iomem *ioaddr; int ret = 0; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - pdata->size = res->end - res->start + 1; - if (!devm_request_mem_region(&pdev->dev, res->start, pdata->size, - pdev->name)) - return -EBUSY; - ioaddr = devm_ioremap(&pdev->dev, res->start, pdata->size); - if (!ioaddr) - return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ioaddr)) + return PTR_ERR(ioaddr); pdata->ioaddr_nvram = ioaddr; - pdata->size_nvram = pdata->size - RTC_SIZE; + pdata->size_nvram = resource_size(res) - RTC_SIZE; pdata->ioaddr_rtc = ioaddr + pdata->size_nvram; sysfs_bin_attr_init(&pdata->nvram_attr); @@ -207,50 +198,44 @@ static int __devinit ds1742_rtc_probe(struct platform_device *pdev) pdata->last_jiffies = jiffies; platform_set_drvdata(pdev, pdata); - rtc = rtc_device_register(pdev->name, &pdev->dev, + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &ds1742_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); - pdata->rtc = rtc; ret = sysfs_create_bin_file(&pdev->dev.kobj, &pdata->nvram_attr); - if (ret) { - dev_err(&pdev->dev, "creating nvram file in sysfs failed\n"); - rtc_device_unregister(rtc); - } - return ret; + if (ret) + dev_err(&pdev->dev, "Unable to create sysfs entry: %s\n", + pdata->nvram_attr.attr.name); + + return 0; } -static int __devexit ds1742_rtc_remove(struct platform_device *pdev) +static int ds1742_rtc_remove(struct platform_device *pdev) { struct rtc_plat_data *pdata = platform_get_drvdata(pdev); sysfs_remove_bin_file(&pdev->dev.kobj, &pdata->nvram_attr); - rtc_device_unregister(pdata->rtc); return 0; } +static const struct of_device_id __maybe_unused ds1742_rtc_of_match[] = { + { .compatible = "maxim,ds1742", }, + { } +}; +MODULE_DEVICE_TABLE(of, ds1742_rtc_of_match); + static struct platform_driver ds1742_rtc_driver = { .probe = ds1742_rtc_probe, - .remove = __devexit_p(ds1742_rtc_remove), + .remove = ds1742_rtc_remove, .driver = { .name = "rtc-ds1742", .owner = THIS_MODULE, + .of_match_table = ds1742_rtc_of_match, }, }; -static __init int ds1742_init(void) -{ - return platform_driver_register(&ds1742_rtc_driver); -} - -static __exit void ds1742_exit(void) -{ - platform_driver_unregister(&ds1742_rtc_driver); -} - -module_init(ds1742_init); -module_exit(ds1742_exit); +module_platform_driver(ds1742_rtc_driver); MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>"); MODULE_DESCRIPTION("Dallas DS1742 RTC driver"); diff --git a/drivers/rtc/rtc-ds2404.c b/drivers/rtc/rtc-ds2404.c new file mode 100644 index 00000000000..fc209dc4e24 --- /dev/null +++ b/drivers/rtc/rtc-ds2404.c @@ -0,0 +1,285 @@ +/* + * Copyright (C) 2012 Sven Schnelle <svens@stackframe.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/types.h> +#include <linux/bcd.h> +#include <linux/rtc-ds2404.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/slab.h> + +#include <linux/io.h> + +#define DS2404_STATUS_REG 0x200 +#define DS2404_CONTROL_REG 0x201 +#define DS2404_RTC_REG 0x202 + +#define DS2404_WRITE_SCRATCHPAD_CMD 0x0f +#define DS2404_READ_SCRATCHPAD_CMD 0xaa +#define DS2404_COPY_SCRATCHPAD_CMD 0x55 +#define DS2404_READ_MEMORY_CMD 0xf0 + +struct ds2404; + +struct ds2404_chip_ops { + int (*map_io)(struct ds2404 *chip, struct platform_device *pdev, + struct ds2404_platform_data *pdata); + void (*unmap_io)(struct ds2404 *chip); +}; + +#define DS2404_RST 0 +#define DS2404_CLK 1 +#define DS2404_DQ 2 + +struct ds2404_gpio { + const char *name; + unsigned int gpio; +}; + +struct ds2404 { + struct ds2404_gpio *gpio; + struct ds2404_chip_ops *ops; + struct rtc_device *rtc; +}; + +static struct ds2404_gpio ds2404_gpio[] = { + { "RTC RST", 0 }, + { "RTC CLK", 0 }, + { "RTC DQ", 0 }, +}; + +static int ds2404_gpio_map(struct ds2404 *chip, struct platform_device *pdev, + struct ds2404_platform_data *pdata) +{ + int i, err; + + ds2404_gpio[DS2404_RST].gpio = pdata->gpio_rst; + ds2404_gpio[DS2404_CLK].gpio = pdata->gpio_clk; + ds2404_gpio[DS2404_DQ].gpio = pdata->gpio_dq; + + for (i = 0; i < ARRAY_SIZE(ds2404_gpio); i++) { + err = gpio_request(ds2404_gpio[i].gpio, ds2404_gpio[i].name); + if (err) { + dev_err(&pdev->dev, "error mapping gpio %s: %d\n", + ds2404_gpio[i].name, err); + goto err_request; + } + if (i != DS2404_DQ) + gpio_direction_output(ds2404_gpio[i].gpio, 1); + } + + chip->gpio = ds2404_gpio; + return 0; + +err_request: + while (--i >= 0) + gpio_free(ds2404_gpio[i].gpio); + return err; +} + +static void ds2404_gpio_unmap(struct ds2404 *chip) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ds2404_gpio); i++) + gpio_free(ds2404_gpio[i].gpio); +} + +static struct ds2404_chip_ops ds2404_gpio_ops = { + .map_io = ds2404_gpio_map, + .unmap_io = ds2404_gpio_unmap, +}; + +static void ds2404_reset(struct device *dev) +{ + gpio_set_value(ds2404_gpio[DS2404_RST].gpio, 0); + udelay(1000); + gpio_set_value(ds2404_gpio[DS2404_RST].gpio, 1); + gpio_set_value(ds2404_gpio[DS2404_CLK].gpio, 0); + gpio_direction_output(ds2404_gpio[DS2404_DQ].gpio, 0); + udelay(10); +} + +static void ds2404_write_byte(struct device *dev, u8 byte) +{ + int i; + + gpio_direction_output(ds2404_gpio[DS2404_DQ].gpio, 1); + for (i = 0; i < 8; i++) { + gpio_set_value(ds2404_gpio[DS2404_DQ].gpio, byte & (1 << i)); + udelay(10); + gpio_set_value(ds2404_gpio[DS2404_CLK].gpio, 1); + udelay(10); + gpio_set_value(ds2404_gpio[DS2404_CLK].gpio, 0); + udelay(10); + } +} + +static u8 ds2404_read_byte(struct device *dev) +{ + int i; + u8 ret = 0; + + gpio_direction_input(ds2404_gpio[DS2404_DQ].gpio); + + for (i = 0; i < 8; i++) { + gpio_set_value(ds2404_gpio[DS2404_CLK].gpio, 0); + udelay(10); + if (gpio_get_value(ds2404_gpio[DS2404_DQ].gpio)) + ret |= 1 << i; + gpio_set_value(ds2404_gpio[DS2404_CLK].gpio, 1); + udelay(10); + } + return ret; +} + +static void ds2404_read_memory(struct device *dev, u16 offset, + int length, u8 *out) +{ + ds2404_reset(dev); + ds2404_write_byte(dev, DS2404_READ_MEMORY_CMD); + ds2404_write_byte(dev, offset & 0xff); + ds2404_write_byte(dev, (offset >> 8) & 0xff); + while (length--) + *out++ = ds2404_read_byte(dev); +} + +static void ds2404_write_memory(struct device *dev, u16 offset, + int length, u8 *out) +{ + int i; + u8 ta01, ta02, es; + + ds2404_reset(dev); + ds2404_write_byte(dev, DS2404_WRITE_SCRATCHPAD_CMD); + ds2404_write_byte(dev, offset & 0xff); + ds2404_write_byte(dev, (offset >> 8) & 0xff); + + for (i = 0; i < length; i++) + ds2404_write_byte(dev, out[i]); + + ds2404_reset(dev); + ds2404_write_byte(dev, DS2404_READ_SCRATCHPAD_CMD); + + ta01 = ds2404_read_byte(dev); + ta02 = ds2404_read_byte(dev); + es = ds2404_read_byte(dev); + + for (i = 0; i < length; i++) { + if (out[i] != ds2404_read_byte(dev)) { + dev_err(dev, "read invalid data\n"); + return; + } + } + + ds2404_reset(dev); + ds2404_write_byte(dev, DS2404_COPY_SCRATCHPAD_CMD); + ds2404_write_byte(dev, ta01); + ds2404_write_byte(dev, ta02); + ds2404_write_byte(dev, es); + + gpio_direction_input(ds2404_gpio[DS2404_DQ].gpio); + while (gpio_get_value(ds2404_gpio[DS2404_DQ].gpio)) + ; +} + +static void ds2404_enable_osc(struct device *dev) +{ + u8 in[1] = { 0x10 }; /* enable oscillator */ + ds2404_write_memory(dev, 0x201, 1, in); +} + +static int ds2404_read_time(struct device *dev, struct rtc_time *dt) +{ + unsigned long time = 0; + + ds2404_read_memory(dev, 0x203, 4, (u8 *)&time); + time = le32_to_cpu(time); + + rtc_time_to_tm(time, dt); + return rtc_valid_tm(dt); +} + +static int ds2404_set_mmss(struct device *dev, unsigned long secs) +{ + u32 time = cpu_to_le32(secs); + ds2404_write_memory(dev, 0x203, 4, (u8 *)&time); + return 0; +} + +static const struct rtc_class_ops ds2404_rtc_ops = { + .read_time = ds2404_read_time, + .set_mmss = ds2404_set_mmss, +}; + +static int rtc_probe(struct platform_device *pdev) +{ + struct ds2404_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct ds2404 *chip; + int retval = -EBUSY; + + chip = devm_kzalloc(&pdev->dev, sizeof(struct ds2404), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->ops = &ds2404_gpio_ops; + + retval = chip->ops->map_io(chip, pdev, pdata); + if (retval) + goto err_chip; + + dev_info(&pdev->dev, "using GPIOs RST:%d, CLK:%d, DQ:%d\n", + chip->gpio[DS2404_RST].gpio, chip->gpio[DS2404_CLK].gpio, + chip->gpio[DS2404_DQ].gpio); + + platform_set_drvdata(pdev, chip); + + chip->rtc = devm_rtc_device_register(&pdev->dev, "ds2404", + &ds2404_rtc_ops, THIS_MODULE); + if (IS_ERR(chip->rtc)) { + retval = PTR_ERR(chip->rtc); + goto err_io; + } + + ds2404_enable_osc(&pdev->dev); + return 0; + +err_io: + chip->ops->unmap_io(chip); +err_chip: + return retval; +} + +static int rtc_remove(struct platform_device *dev) +{ + struct ds2404 *chip = platform_get_drvdata(dev); + + chip->ops->unmap_io(chip); + + return 0; +} + +static struct platform_driver rtc_device_driver = { + .probe = rtc_probe, + .remove = rtc_remove, + .driver = { + .name = "ds2404", + .owner = THIS_MODULE, + }, +}; +module_platform_driver(rtc_device_driver); + +MODULE_DESCRIPTION("DS2404 RTC"); +MODULE_AUTHOR("Sven Schnelle"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ds2404"); diff --git a/drivers/rtc/rtc-ds3232.c b/drivers/rtc/rtc-ds3232.c index 57063552d3b..adaf06c4147 100644 --- a/drivers/rtc/rtc-ds3232.c +++ b/drivers/rtc/rtc-ds3232.c @@ -1,7 +1,7 @@ /* * RTC client/driver for the Maxim/Dallas DS3232 Real-Time Clock over I2C * - * Copyright (C) 2009-2010 Freescale Semiconductor. + * Copyright (C) 2009-2011 Freescale Semiconductor. * Author: Jack Lan <jack.lan@freescale.com> * * This program is free software; you can redistribute it and/or modify it @@ -57,6 +57,7 @@ struct ds3232 { * in the remove function. */ struct mutex mutex; + bool suspended; int exiting; }; @@ -141,9 +142,11 @@ static int ds3232_read_time(struct device *dev, struct rtc_time *time) time->tm_hour = bcd2bin(hour); } - time->tm_wday = bcd2bin(week); + /* Day of the week in linux range is 0~6 while 1~7 in RTC chip */ + time->tm_wday = bcd2bin(week) - 1; time->tm_mday = bcd2bin(day); - time->tm_mon = bcd2bin(month & 0x7F); + /* linux tm_mon range:0~11, while month range is 1~12 in RTC chip */ + time->tm_mon = bcd2bin(month & 0x7F) - 1; if (century) add_century = 100; @@ -162,9 +165,11 @@ static int ds3232_set_time(struct device *dev, struct rtc_time *time) buf[0] = bin2bcd(time->tm_sec); buf[1] = bin2bcd(time->tm_min); buf[2] = bin2bcd(time->tm_hour); - buf[3] = bin2bcd(time->tm_wday); /* Day of the week */ + /* Day of the week in linux range is 0~6 while 1~7 in RTC chip */ + buf[3] = bin2bcd(time->tm_wday + 1); buf[4] = bin2bcd(time->tm_mday); /* Date */ - buf[5] = bin2bcd(time->tm_mon); + /* linux tm_mon range:0~11, while month range is 1~12 in RTC chip */ + buf[5] = bin2bcd(time->tm_mon + 1); if (time->tm_year >= 100) { buf[5] |= 0x80; buf[6] = bin2bcd(time->tm_year - 100); @@ -335,30 +340,21 @@ static int ds3232_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int ds3232_update_irq_enable(struct device *dev, unsigned int enabled) -{ - struct i2c_client *client = to_i2c_client(dev); - struct ds3232 *ds3232 = i2c_get_clientdata(client); - - if (client->irq <= 0) - return -EINVAL; - - if (enabled) - ds3232->rtc->irq_data |= RTC_UF; - else - ds3232->rtc->irq_data &= ~RTC_UF; - - ds3232_update_alarm(client); - return 0; -} - static irqreturn_t ds3232_irq(int irq, void *dev_id) { struct i2c_client *client = dev_id; struct ds3232 *ds3232 = i2c_get_clientdata(client); disable_irq_nosync(irq); - schedule_work(&ds3232->work); + + /* + * If rtc as a wakeup source, can't schedule the work + * at system resume flow, because at this time the i2c bus + * has not been resumed. + */ + if (!ds3232->suspended) + schedule_work(&ds3232->work); + return IRQ_HANDLED; } @@ -376,22 +372,26 @@ static void ds3232_work(struct work_struct *work) if (stat & DS3232_REG_SR_A1F) { control = i2c_smbus_read_byte_data(client, DS3232_REG_CR); - if (control < 0) - goto out; - /* disable alarm1 interrupt */ - control &= ~(DS3232_REG_CR_A1IE); - i2c_smbus_write_byte_data(client, DS3232_REG_CR, control); - - /* clear the alarm pend flag */ - stat &= ~DS3232_REG_SR_A1F; - i2c_smbus_write_byte_data(client, DS3232_REG_SR, stat); - - rtc_update_irq(ds3232->rtc, 1, RTC_AF | RTC_IRQF); + if (control < 0) { + pr_warn("Read DS3232 Control Register error." + "Disable IRQ%d.\n", client->irq); + } else { + /* disable alarm1 interrupt */ + control &= ~(DS3232_REG_CR_A1IE); + i2c_smbus_write_byte_data(client, DS3232_REG_CR, + control); + + /* clear the alarm pend flag */ + stat &= ~DS3232_REG_SR_A1F; + i2c_smbus_write_byte_data(client, DS3232_REG_SR, stat); + + rtc_update_irq(ds3232->rtc, 1, RTC_AF | RTC_IRQF); + + if (!ds3232->exiting) + enable_irq(client->irq); + } } -out: - if (!ds3232->exiting) - enable_irq(client->irq); unlock: mutex_unlock(&ds3232->mutex); } @@ -402,16 +402,15 @@ static const struct rtc_class_ops ds3232_rtc_ops = { .read_alarm = ds3232_read_alarm, .set_alarm = ds3232_set_alarm, .alarm_irq_enable = ds3232_alarm_irq_enable, - .update_irq_enable = ds3232_update_irq_enable, }; -static int __devinit ds3232_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int ds3232_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct ds3232 *ds3232; int ret; - ds3232 = kzalloc(sizeof(struct ds3232), GFP_KERNEL); + ds3232 = devm_kzalloc(&client->dev, sizeof(struct ds3232), GFP_KERNEL); if (!ds3232) return -ENOMEM; @@ -423,37 +422,22 @@ static int __devinit ds3232_probe(struct i2c_client *client, ret = ds3232_check_rtc_status(client); if (ret) - goto out_free; - - ds3232->rtc = rtc_device_register(client->name, &client->dev, - &ds3232_rtc_ops, THIS_MODULE); - if (IS_ERR(ds3232->rtc)) { - ret = PTR_ERR(ds3232->rtc); - dev_err(&client->dev, "unable to register the class device\n"); - goto out_irq; - } + return ret; - if (client->irq >= 0) { - ret = request_irq(client->irq, ds3232_irq, 0, - "ds3232", client); + if (client->irq > 0) { + ret = devm_request_irq(&client->dev, client->irq, ds3232_irq, + IRQF_SHARED, "ds3232", client); if (ret) { dev_err(&client->dev, "unable to request IRQ\n"); - goto out_free; } + device_init_wakeup(&client->dev, 1); } - - return 0; - -out_irq: - if (client->irq >= 0) - free_irq(client->irq, client); - -out_free: - kfree(ds3232); - return ret; + ds3232->rtc = devm_rtc_device_register(&client->dev, client->name, + &ds3232_rtc_ops, THIS_MODULE); + return PTR_ERR_OR_ZERO(ds3232->rtc); } -static int __devexit ds3232_remove(struct i2c_client *client) +static int ds3232_remove(struct i2c_client *client) { struct ds3232 *ds3232 = i2c_get_clientdata(client); @@ -462,14 +446,48 @@ static int __devexit ds3232_remove(struct i2c_client *client) ds3232->exiting = 1; mutex_unlock(&ds3232->mutex); - free_irq(client->irq, client); - flush_scheduled_work(); + devm_free_irq(&client->dev, client->irq, client); + cancel_work_sync(&ds3232->work); + } + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int ds3232_suspend(struct device *dev) +{ + struct ds3232 *ds3232 = dev_get_drvdata(dev); + struct i2c_client *client = to_i2c_client(dev); + + if (device_can_wakeup(dev)) { + ds3232->suspended = true; + irq_set_irq_wake(client->irq, 1); + } + + return 0; +} + +static int ds3232_resume(struct device *dev) +{ + struct ds3232 *ds3232 = dev_get_drvdata(dev); + struct i2c_client *client = to_i2c_client(dev); + + if (ds3232->suspended) { + ds3232->suspended = false; + + /* Clear the hardware alarm pend flag */ + schedule_work(&ds3232->work); + + irq_set_irq_wake(client->irq, 0); } - rtc_device_unregister(ds3232->rtc); - kfree(ds3232); return 0; } +#endif + +static const struct dev_pm_ops ds3232_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ds3232_suspend, ds3232_resume) +}; static const struct i2c_device_id ds3232_id[] = { { "ds3232", 0 }, @@ -481,24 +499,14 @@ static struct i2c_driver ds3232_driver = { .driver = { .name = "rtc-ds3232", .owner = THIS_MODULE, + .pm = &ds3232_pm_ops, }, .probe = ds3232_probe, - .remove = __devexit_p(ds3232_remove), + .remove = ds3232_remove, .id_table = ds3232_id, }; -static int __init ds3232_init(void) -{ - return i2c_add_driver(&ds3232_driver); -} - -static void __exit ds3232_exit(void) -{ - i2c_del_driver(&ds3232_driver); -} - -module_init(ds3232_init); -module_exit(ds3232_exit); +module_i2c_driver(ds3232_driver); MODULE_AUTHOR("Srikanth Srinivasan <srikanth.srinivasan@freescale.com>"); MODULE_DESCRIPTION("Maxim/Dallas DS3232 RTC Driver"); diff --git a/drivers/rtc/rtc-ds3234.c b/drivers/rtc/rtc-ds3234.c index a774ca35b5f..4c9ba536846 100644 --- a/drivers/rtc/rtc-ds3234.c +++ b/drivers/rtc/rtc-ds3234.c @@ -73,7 +73,7 @@ static int ds3234_read_time(struct device *dev, struct rtc_time *dt) dt->tm_wday = bcd2bin(buf[3]) - 1; /* 0 = Sun */ dt->tm_mday = bcd2bin(buf[4]); dt->tm_mon = bcd2bin(buf[5] & 0x1f) - 1; /* 0 = Jan */ - dt->tm_year = bcd2bin(buf[6] & 0xff) + 100; /* Assume 20YY */ + dt->tm_year = bcd2bin(buf[6] & 0xff) + 100; /* Assume 20YY */ return rtc_valid_tm(dt); } @@ -105,7 +105,7 @@ static const struct rtc_class_ops ds3234_rtc_ops = { .set_time = ds3234_set_time, }; -static int __devinit ds3234_probe(struct spi_device *spi) +static int ds3234_probe(struct spi_device *spi) { struct rtc_device *rtc; unsigned char tmp; @@ -146,44 +146,25 @@ static int __devinit ds3234_probe(struct spi_device *spi) ds3234_get_reg(&spi->dev, DS3234_REG_CONT_STAT, &tmp); dev_info(&spi->dev, "Ctrl/Stat Reg: 0x%02x\n", tmp); - rtc = rtc_device_register("ds3234", - &spi->dev, &ds3234_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&spi->dev, "ds3234", + &ds3234_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); - dev_set_drvdata(&spi->dev, rtc); + spi_set_drvdata(spi, rtc); return 0; } -static int __devexit ds3234_remove(struct spi_device *spi) -{ - struct rtc_device *rtc = platform_get_drvdata(spi); - - rtc_device_unregister(rtc); - return 0; -} - static struct spi_driver ds3234_driver = { .driver = { .name = "ds3234", .owner = THIS_MODULE, }, .probe = ds3234_probe, - .remove = __devexit_p(ds3234_remove), }; -static __init int ds3234_init(void) -{ - return spi_register_driver(&ds3234_driver); -} -module_init(ds3234_init); - -static __exit void ds3234_exit(void) -{ - spi_unregister_driver(&ds3234_driver); -} -module_exit(ds3234_exit); +module_spi_driver(ds3234_driver); MODULE_DESCRIPTION("DS3234 SPI RTC driver"); MODULE_AUTHOR("Dennis Aberilla <denzzzhome@yahoo.com>"); diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c index 550292304b0..c4c38431012 100644 --- a/drivers/rtc/rtc-efi.c +++ b/drivers/rtc/rtc-efi.c @@ -13,6 +13,8 @@ * */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> #include <linux/module.h> #include <linux/time.h> @@ -33,7 +35,7 @@ static inline int compute_yday(efi_time_t *eft) { /* efi_time_t.month is in the [1-12] so, we need -1 */ - return rtc_year_days(eft->day - 1, eft->month - 1, eft->year); + return rtc_year_days(eft->day, eft->month - 1, eft->year); } /* * returns day of the week [0-6] 0=Sunday @@ -47,7 +49,7 @@ compute_wday(efi_time_t *eft) int ndays = 0; if (eft->year < 1998) { - printk(KERN_ERR "efirtc: EFI year < 1998, invalid date\n"); + pr_err("EFI year < 1998, invalid date\n"); return -1; } @@ -70,7 +72,7 @@ convert_to_efi_time(struct rtc_time *wtime, efi_time_t *eft) eft->day = wtime->tm_mday; eft->hour = wtime->tm_hour; eft->minute = wtime->tm_min; - eft->second = wtime->tm_sec; + eft->second = wtime->tm_sec; eft->nanosecond = 0; eft->daylight = wtime->tm_isdst ? EFI_ISDST : 0; eft->timezone = EFI_UNSPECIFIED_TIMEZONE; @@ -142,7 +144,7 @@ static int efi_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) */ status = efi.set_wakeup_time((efi_bool_t)wkalrm->enabled, &eft); - printk(KERN_WARNING "write status is %d\n", (int)status); + dev_warn(dev, "write status is %d\n", (int)status); return status == EFI_SUCCESS ? 0 : -EINVAL; } @@ -157,7 +159,7 @@ static int efi_read_time(struct device *dev, struct rtc_time *tm) if (status != EFI_SUCCESS) { /* should never happen */ - printk(KERN_ERR "efitime: can't read time\n"); + dev_err(dev, "can't read time\n"); return -EINVAL; } @@ -189,7 +191,7 @@ static int __init efi_rtc_probe(struct platform_device *dev) { struct rtc_device *rtc; - rtc = rtc_device_register("rtc-efi", &dev->dev, &efi_rtc_ops, + rtc = devm_rtc_device_register(&dev->dev, "rtc-efi", &efi_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -199,36 +201,14 @@ static int __init efi_rtc_probe(struct platform_device *dev) return 0; } -static int __exit efi_rtc_remove(struct platform_device *dev) -{ - struct rtc_device *rtc = platform_get_drvdata(dev); - - rtc_device_unregister(rtc); - - return 0; -} - static struct platform_driver efi_rtc_driver = { .driver = { .name = "rtc-efi", .owner = THIS_MODULE, }, - .probe = efi_rtc_probe, - .remove = __exit_p(efi_rtc_remove), }; -static int __init efi_rtc_init(void) -{ - return platform_driver_probe(&efi_rtc_driver, efi_rtc_probe); -} - -static void __exit efi_rtc_exit(void) -{ - platform_driver_unregister(&efi_rtc_driver); -} - -module_init(efi_rtc_init); -module_exit(efi_rtc_exit); +module_platform_driver_probe(efi_rtc_driver, efi_rtc_probe); MODULE_AUTHOR("dann frazier <dannf@hp.com>"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-em3027.c b/drivers/rtc/rtc-em3027.c new file mode 100644 index 00000000000..fccf3669924 --- /dev/null +++ b/drivers/rtc/rtc-em3027.c @@ -0,0 +1,151 @@ +/* + * An rtc/i2c driver for the EM Microelectronic EM3027 + * Copyright 2011 CompuLab, Ltd. + * + * Author: Mike Rapoport <mike@compulab.co.il> + * + * Based on rtc-ds1672.c by Alessandro Zummo <a.zummo@towertech.it> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/i2c.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/module.h> + +/* Registers */ +#define EM3027_REG_ON_OFF_CTRL 0x00 +#define EM3027_REG_IRQ_CTRL 0x01 +#define EM3027_REG_IRQ_FLAGS 0x02 +#define EM3027_REG_STATUS 0x03 +#define EM3027_REG_RST_CTRL 0x04 + +#define EM3027_REG_WATCH_SEC 0x08 +#define EM3027_REG_WATCH_MIN 0x09 +#define EM3027_REG_WATCH_HOUR 0x0a +#define EM3027_REG_WATCH_DATE 0x0b +#define EM3027_REG_WATCH_DAY 0x0c +#define EM3027_REG_WATCH_MON 0x0d +#define EM3027_REG_WATCH_YEAR 0x0e + +#define EM3027_REG_ALARM_SEC 0x10 +#define EM3027_REG_ALARM_MIN 0x11 +#define EM3027_REG_ALARM_HOUR 0x12 +#define EM3027_REG_ALARM_DATE 0x13 +#define EM3027_REG_ALARM_DAY 0x14 +#define EM3027_REG_ALARM_MON 0x15 +#define EM3027_REG_ALARM_YEAR 0x16 + +static struct i2c_driver em3027_driver; + +static int em3027_get_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + + unsigned char addr = EM3027_REG_WATCH_SEC; + unsigned char buf[7]; + + struct i2c_msg msgs[] = { + {/* setup read addr */ + .addr = client->addr, + .len = 1, + .buf = &addr + }, + {/* read time/date */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 7, + .buf = buf + }, + }; + + /* read time/date registers */ + if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) { + dev_err(&client->dev, "%s: read error\n", __func__); + return -EIO; + } + + tm->tm_sec = bcd2bin(buf[0]); + tm->tm_min = bcd2bin(buf[1]); + tm->tm_hour = bcd2bin(buf[2]); + tm->tm_mday = bcd2bin(buf[3]); + tm->tm_wday = bcd2bin(buf[4]); + tm->tm_mon = bcd2bin(buf[5]); + tm->tm_year = bcd2bin(buf[6]) + 100; + + return 0; +} + +static int em3027_set_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + unsigned char buf[8]; + + struct i2c_msg msg = { + .addr = client->addr, + .len = 8, + .buf = buf, /* write time/date */ + }; + + buf[0] = EM3027_REG_WATCH_SEC; + buf[1] = bin2bcd(tm->tm_sec); + buf[2] = bin2bcd(tm->tm_min); + buf[3] = bin2bcd(tm->tm_hour); + buf[4] = bin2bcd(tm->tm_mday); + buf[5] = bin2bcd(tm->tm_wday); + buf[6] = bin2bcd(tm->tm_mon); + buf[7] = bin2bcd(tm->tm_year % 100); + + /* write time/date registers */ + if ((i2c_transfer(client->adapter, &msg, 1)) != 1) { + dev_err(&client->dev, "%s: write error\n", __func__); + return -EIO; + } + + return 0; +} + +static const struct rtc_class_ops em3027_rtc_ops = { + .read_time = em3027_get_time, + .set_time = em3027_set_time, +}; + +static int em3027_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct rtc_device *rtc; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -ENODEV; + + rtc = devm_rtc_device_register(&client->dev, em3027_driver.driver.name, + &em3027_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + i2c_set_clientdata(client, rtc); + + return 0; +} + +static struct i2c_device_id em3027_id[] = { + { "em3027", 0 }, + { } +}; + +static struct i2c_driver em3027_driver = { + .driver = { + .name = "rtc-em3027", + }, + .probe = &em3027_probe, + .id_table = em3027_id, +}; + +module_i2c_driver(em3027_driver); + +MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); +MODULE_DESCRIPTION("EM Microelectronic EM3027 RTC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c index 11ae64dcbf3..5e4f5dc40ba 100644 --- a/drivers/rtc/rtc-ep93xx.c +++ b/drivers/rtc/rtc-ep93xx.c @@ -36,12 +36,13 @@ */ struct ep93xx_rtc { void __iomem *mmio_base; + struct rtc_device *rtc; }; static int ep93xx_rtc_get_swcomp(struct device *dev, unsigned short *preload, unsigned short *delete) { - struct ep93xx_rtc *ep93xx_rtc = dev->platform_data; + struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); unsigned long comp; comp = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_SWCOMP); @@ -59,7 +60,7 @@ static int ep93xx_rtc_get_swcomp(struct device *dev, unsigned short *preload, static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm) { - struct ep93xx_rtc *ep93xx_rtc = dev->platform_data; + struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); unsigned long time; time = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_DATA); @@ -70,7 +71,7 @@ static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm) static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs) { - struct ep93xx_rtc *ep93xx_rtc = dev->platform_data; + struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); __raw_writel(secs + 1, ep93xx_rtc->mmio_base + EP93XX_RTC_LOAD); return 0; @@ -126,11 +127,10 @@ static const struct attribute_group ep93xx_rtc_sysfs_files = { .attrs = ep93xx_rtc_attrs, }; -static int __init ep93xx_rtc_probe(struct platform_device *pdev) +static int ep93xx_rtc_probe(struct platform_device *pdev) { struct ep93xx_rtc *ep93xx_rtc; struct resource *res; - struct rtc_device *rtc; int err; ep93xx_rtc = devm_kzalloc(&pdev->dev, sizeof(*ep93xx_rtc), GFP_KERNEL); @@ -138,80 +138,52 @@ static int __init ep93xx_rtc_probe(struct platform_device *pdev) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENXIO; - - if (!devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), pdev->name)) - return -EBUSY; - - ep93xx_rtc->mmio_base = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); - if (!ep93xx_rtc->mmio_base) - return -ENXIO; + ep93xx_rtc->mmio_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ep93xx_rtc->mmio_base)) + return PTR_ERR(ep93xx_rtc->mmio_base); pdev->dev.platform_data = ep93xx_rtc; + platform_set_drvdata(pdev, ep93xx_rtc); - rtc = rtc_device_register(pdev->name, - &pdev->dev, &ep93xx_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - err = PTR_ERR(rtc); + ep93xx_rtc->rtc = devm_rtc_device_register(&pdev->dev, + pdev->name, &ep93xx_rtc_ops, THIS_MODULE); + if (IS_ERR(ep93xx_rtc->rtc)) { + err = PTR_ERR(ep93xx_rtc->rtc); goto exit; } - platform_set_drvdata(pdev, rtc); - err = sysfs_create_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files); if (err) - goto fail; + goto exit; return 0; -fail: - platform_set_drvdata(pdev, NULL); - rtc_device_unregister(rtc); exit: pdev->dev.platform_data = NULL; return err; } -static int __exit ep93xx_rtc_remove(struct platform_device *pdev) +static int ep93xx_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - sysfs_remove_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files); - platform_set_drvdata(pdev, NULL); - rtc_device_unregister(rtc); pdev->dev.platform_data = NULL; return 0; } -/* work with hotplug and coldplug */ -MODULE_ALIAS("platform:ep93xx-rtc"); - static struct platform_driver ep93xx_rtc_driver = { .driver = { .name = "ep93xx-rtc", .owner = THIS_MODULE, }, - .remove = __exit_p(ep93xx_rtc_remove), + .probe = ep93xx_rtc_probe, + .remove = ep93xx_rtc_remove, }; -static int __init ep93xx_rtc_init(void) -{ - return platform_driver_probe(&ep93xx_rtc_driver, ep93xx_rtc_probe); -} - -static void __exit ep93xx_rtc_exit(void) -{ - platform_driver_unregister(&ep93xx_rtc_driver); -} +module_platform_driver(ep93xx_rtc_driver); MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); MODULE_DESCRIPTION("EP93XX RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(ep93xx_rtc_init); -module_exit(ep93xx_rtc_exit); +MODULE_ALIAS("platform:ep93xx-rtc"); diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c index 4cf2e70c507..83c3b3029fa 100644 --- a/drivers/rtc/rtc-fm3130.c +++ b/drivers/rtc/rtc-fm3130.c @@ -47,7 +47,7 @@ struct fm3130 { u8 reg_addr_time; - u8 reg_addr_alarm; + u8 reg_addr_alarm; u8 regs[15]; struct i2c_msg msg[4]; struct i2c_client *client; @@ -116,17 +116,7 @@ static int fm3130_get_time(struct device *dev, struct rtc_time *t) fm3130_rtc_mode(dev, FM3130_MODE_NORMAL); - dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x %02x" - "%02x %02x %02x %02x %02x %02x %02x\n", - "read", - fm3130->regs[0], fm3130->regs[1], - fm3130->regs[2], fm3130->regs[3], - fm3130->regs[4], fm3130->regs[5], - fm3130->regs[6], fm3130->regs[7], - fm3130->regs[8], fm3130->regs[9], - fm3130->regs[0xa], fm3130->regs[0xb], - fm3130->regs[0xc], fm3130->regs[0xd], - fm3130->regs[0xe]); + dev_dbg(dev, "%s: %15ph\n", "read", fm3130->regs); t->tm_sec = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f); t->tm_min = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f); @@ -175,12 +165,7 @@ static int fm3130_set_time(struct device *dev, struct rtc_time *t) tmp = t->tm_year - 100; buf[FM3130_RTC_YEARS] = bin2bcd(tmp); - dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x" - "%02x %02x %02x %02x %02x %02x %02x %02x\n", - "write", buf[0], buf[1], buf[2], buf[3], - buf[4], buf[5], buf[6], buf[7], - buf[8], buf[9], buf[0xa], buf[0xb], - buf[0xc], buf[0xd], buf[0xe]); + dev_dbg(dev, "%s: %15ph\n", "write", buf); fm3130_rtc_mode(dev, FM3130_MODE_WRITE); @@ -361,8 +346,8 @@ static const struct rtc_class_ops fm3130_rtc_ops = { static struct i2c_driver fm3130_driver; -static int __devinit fm3130_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int fm3130_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct fm3130 *fm3130; int err = -ENODEV; @@ -373,7 +358,7 @@ static int __devinit fm3130_probe(struct i2c_client *client, I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) return -EIO; - fm3130 = kzalloc(sizeof(struct fm3130), GFP_KERNEL); + fm3130 = devm_kzalloc(&client->dev, sizeof(struct fm3130), GFP_KERNEL); if (!fm3130) return -ENOMEM; @@ -410,7 +395,7 @@ static int __devinit fm3130_probe(struct i2c_client *client, tmp = i2c_transfer(adapter, fm3130->msg, 4); if (tmp != 4) { - pr_debug("read error %d\n", tmp); + dev_dbg(&client->dev, "read error %d\n", tmp); err = -EIO; goto exit_free; } @@ -517,22 +502,12 @@ bad_alarm: bad_clock: if (!fm3130->data_valid || !fm3130->alarm_valid) - dev_dbg(&client->dev, - "%s: %02x %02x %02x %02x %02x %02x %02x %02x" - "%02x %02x %02x %02x %02x %02x %02x\n", - "bogus registers", - fm3130->regs[0], fm3130->regs[1], - fm3130->regs[2], fm3130->regs[3], - fm3130->regs[4], fm3130->regs[5], - fm3130->regs[6], fm3130->regs[7], - fm3130->regs[8], fm3130->regs[9], - fm3130->regs[0xa], fm3130->regs[0xb], - fm3130->regs[0xc], fm3130->regs[0xd], - fm3130->regs[0xe]); + dev_dbg(&client->dev, "%s: %15ph\n", "bogus registers", + fm3130->regs); /* We won't bail out here because we just got invalid data. Time setting from u-boot doesn't work anyway */ - fm3130->rtc = rtc_device_register(client->name, &client->dev, + fm3130->rtc = devm_rtc_device_register(&client->dev, client->name, &fm3130_rtc_ops, THIS_MODULE); if (IS_ERR(fm3130->rtc)) { err = PTR_ERR(fm3130->rtc); @@ -542,40 +517,19 @@ bad_clock: } return 0; exit_free: - kfree(fm3130); return err; } -static int __devexit fm3130_remove(struct i2c_client *client) -{ - struct fm3130 *fm3130 = i2c_get_clientdata(client); - - rtc_device_unregister(fm3130->rtc); - kfree(fm3130); - return 0; -} - static struct i2c_driver fm3130_driver = { .driver = { .name = "rtc-fm3130", .owner = THIS_MODULE, }, .probe = fm3130_probe, - .remove = __devexit_p(fm3130_remove), .id_table = fm3130_id, }; -static int __init fm3130_init(void) -{ - return i2c_add_driver(&fm3130_driver); -} -module_init(fm3130_init); - -static void __exit fm3130_exit(void) -{ - i2c_del_driver(&fm3130_driver); -} -module_exit(fm3130_exit); +module_i2c_driver(fm3130_driver); MODULE_DESCRIPTION("RTC driver for FM3130"); MODULE_AUTHOR("Sergey Lapin <slapin@ossfans.org>"); diff --git a/drivers/rtc/rtc-generic.c b/drivers/rtc/rtc-generic.c index 98322004ad2..9b6725ebbfb 100644 --- a/drivers/rtc/rtc-generic.c +++ b/drivers/rtc/rtc-generic.c @@ -38,8 +38,8 @@ static int __init generic_rtc_probe(struct platform_device *dev) { struct rtc_device *rtc; - rtc = rtc_device_register("rtc-generic", &dev->dev, &generic_rtc_ops, - THIS_MODULE); + rtc = devm_rtc_device_register(&dev->dev, "rtc-generic", + &generic_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -48,35 +48,14 @@ static int __init generic_rtc_probe(struct platform_device *dev) return 0; } -static int __exit generic_rtc_remove(struct platform_device *dev) -{ - struct rtc_device *rtc = platform_get_drvdata(dev); - - rtc_device_unregister(rtc); - - return 0; -} - static struct platform_driver generic_rtc_driver = { .driver = { .name = "rtc-generic", .owner = THIS_MODULE, }, - .remove = __exit_p(generic_rtc_remove), }; -static int __init generic_rtc_init(void) -{ - return platform_driver_probe(&generic_rtc_driver, generic_rtc_probe); -} - -static void __exit generic_rtc_fini(void) -{ - platform_driver_unregister(&generic_rtc_driver); -} - -module_init(generic_rtc_init); -module_exit(generic_rtc_fini); +module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe); MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c new file mode 100644 index 00000000000..965a9da7086 --- /dev/null +++ b/drivers/rtc/rtc-hid-sensor-time.c @@ -0,0 +1,343 @@ +/* + * HID Sensor Time Driver + * Copyright (c) 2012, Alexander Holler. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/rtc.h> + +enum hid_time_channel { + CHANNEL_SCAN_INDEX_YEAR, + CHANNEL_SCAN_INDEX_MONTH, + CHANNEL_SCAN_INDEX_DAY, + CHANNEL_SCAN_INDEX_HOUR, + CHANNEL_SCAN_INDEX_MINUTE, + CHANNEL_SCAN_INDEX_SECOND, + TIME_RTC_CHANNEL_MAX, +}; + +struct hid_time_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_common common_attributes; + struct hid_sensor_hub_attribute_info info[TIME_RTC_CHANNEL_MAX]; + struct rtc_time last_time; + spinlock_t lock_last_time; + struct completion comp_last_time; + struct rtc_time time_buf; + struct rtc_device *rtc; +}; + +static const u32 hid_time_addresses[TIME_RTC_CHANNEL_MAX] = { + HID_USAGE_SENSOR_TIME_YEAR, + HID_USAGE_SENSOR_TIME_MONTH, + HID_USAGE_SENSOR_TIME_DAY, + HID_USAGE_SENSOR_TIME_HOUR, + HID_USAGE_SENSOR_TIME_MINUTE, + HID_USAGE_SENSOR_TIME_SECOND, +}; + +/* Channel names for verbose error messages */ +static const char * const hid_time_channel_names[TIME_RTC_CHANNEL_MAX] = { + "year", "month", "day", "hour", "minute", "second", +}; + +/* Callback handler to send event after all samples are received and captured */ +static int hid_time_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, void *priv) +{ + unsigned long flags; + struct hid_time_state *time_state = platform_get_drvdata(priv); + + spin_lock_irqsave(&time_state->lock_last_time, flags); + time_state->last_time = time_state->time_buf; + spin_unlock_irqrestore(&time_state->lock_last_time, flags); + complete(&time_state->comp_last_time); + return 0; +} + +static u32 hid_time_value(size_t raw_len, char *raw_data) +{ + switch (raw_len) { + case 1: + return *(u8 *)raw_data; + case 2: + return *(u16 *)raw_data; + case 4: + return *(u32 *)raw_data; + default: + return (u32)(~0U); /* 0xff... or -1 to denote an error */ + } +} + +static int hid_time_capture_sample(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, size_t raw_len, + char *raw_data, void *priv) +{ + struct hid_time_state *time_state = platform_get_drvdata(priv); + struct rtc_time *time_buf = &time_state->time_buf; + + switch (usage_id) { + case HID_USAGE_SENSOR_TIME_YEAR: + /* + * The draft for HID-sensors (HUTRR39) currently doesn't define + * the range for the year attribute. Therefor we support + * 8 bit (0-99) and 16 or 32 bits (full) as size for the year. + */ + if (raw_len == 1) { + time_buf->tm_year = *(u8 *)raw_data; + if (time_buf->tm_year < 70) + /* assume we are in 1970...2069 */ + time_buf->tm_year += 100; + } else + time_buf->tm_year = + (int)hid_time_value(raw_len, raw_data)-1900; + break; + case HID_USAGE_SENSOR_TIME_MONTH: + /* sensors are sending the month as 1-12, we need 0-11 */ + time_buf->tm_mon = (int)hid_time_value(raw_len, raw_data)-1; + break; + case HID_USAGE_SENSOR_TIME_DAY: + time_buf->tm_mday = (int)hid_time_value(raw_len, raw_data); + break; + case HID_USAGE_SENSOR_TIME_HOUR: + time_buf->tm_hour = (int)hid_time_value(raw_len, raw_data); + break; + case HID_USAGE_SENSOR_TIME_MINUTE: + time_buf->tm_min = (int)hid_time_value(raw_len, raw_data); + break; + case HID_USAGE_SENSOR_TIME_SECOND: + time_buf->tm_sec = (int)hid_time_value(raw_len, raw_data); + break; + default: + return -EINVAL; + } + return 0; +} + +/* small helper, haven't found any other way */ +static const char *hid_time_attrib_name(u32 attrib_id) +{ + static const char unknown[] = "unknown"; + unsigned i; + + for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) { + if (hid_time_addresses[i] == attrib_id) + return hid_time_channel_names[i]; + } + return unknown; /* should never happen */ +} + +static int hid_time_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + struct hid_time_state *time_state) +{ + int report_id, i; + + for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) + if (sensor_hub_input_get_attribute_info(hsdev, + HID_INPUT_REPORT, usage_id, + hid_time_addresses[i], + &time_state->info[i]) < 0) + return -EINVAL; + /* Check the (needed) attributes for sanity */ + report_id = time_state->info[0].report_id; + if (report_id < 0) { + dev_err(&pdev->dev, "bad report ID!\n"); + return -EINVAL; + } + for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) { + if (time_state->info[i].report_id != report_id) { + dev_err(&pdev->dev, + "not all needed attributes inside the same report!\n"); + return -EINVAL; + } + if (time_state->info[i].size == 3 || + time_state->info[i].size > 4) { + dev_err(&pdev->dev, + "attribute '%s' not 8, 16 or 32 bits wide!\n", + hid_time_attrib_name( + time_state->info[i].attrib_id)); + return -EINVAL; + } + if (time_state->info[i].units != + HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED && + /* allow attribute seconds with unit seconds */ + !(time_state->info[i].attrib_id == + HID_USAGE_SENSOR_TIME_SECOND && + time_state->info[i].units == + HID_USAGE_SENSOR_UNITS_SECOND)) { + dev_err(&pdev->dev, + "attribute '%s' hasn't a unit of type 'none'!\n", + hid_time_attrib_name( + time_state->info[i].attrib_id)); + return -EINVAL; + } + if (time_state->info[i].unit_expo) { + dev_err(&pdev->dev, + "attribute '%s' hasn't a unit exponent of 1!\n", + hid_time_attrib_name( + time_state->info[i].attrib_id)); + return -EINVAL; + } + } + + return 0; +} + +static int hid_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + unsigned long flags; + struct hid_time_state *time_state = + platform_get_drvdata(to_platform_device(dev)); + int ret; + + reinit_completion(&time_state->comp_last_time); + /* get a report with all values through requesting one value */ + sensor_hub_input_attr_get_raw_value(time_state->common_attributes.hsdev, + HID_USAGE_SENSOR_TIME, hid_time_addresses[0], + time_state->info[0].report_id); + /* wait for all values (event) */ + ret = wait_for_completion_killable_timeout( + &time_state->comp_last_time, HZ*6); + if (ret > 0) { + /* no error */ + spin_lock_irqsave(&time_state->lock_last_time, flags); + *tm = time_state->last_time; + spin_unlock_irqrestore(&time_state->lock_last_time, flags); + return 0; + } + if (!ret) + return -EIO; /* timeouted */ + return ret; /* killed (-ERESTARTSYS) */ +} + +static const struct rtc_class_ops hid_time_rtc_ops = { + .read_time = hid_rtc_read_time, +}; + +static int hid_time_probe(struct platform_device *pdev) +{ + int ret = 0; + struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev); + struct hid_time_state *time_state = devm_kzalloc(&pdev->dev, + sizeof(struct hid_time_state), GFP_KERNEL); + + if (time_state == NULL) + return -ENOMEM; + + platform_set_drvdata(pdev, time_state); + + spin_lock_init(&time_state->lock_last_time); + init_completion(&time_state->comp_last_time); + time_state->common_attributes.hsdev = hsdev; + time_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, + HID_USAGE_SENSOR_TIME, + &time_state->common_attributes); + if (ret) { + dev_err(&pdev->dev, "failed to setup common attributes!\n"); + return ret; + } + + ret = hid_time_parse_report(pdev, hsdev, HID_USAGE_SENSOR_TIME, + time_state); + if (ret) { + dev_err(&pdev->dev, "failed to setup attributes!\n"); + return ret; + } + + time_state->callbacks.send_event = hid_time_proc_event; + time_state->callbacks.capture_sample = hid_time_capture_sample; + time_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_TIME, + &time_state->callbacks); + if (ret < 0) { + dev_err(&pdev->dev, "register callback failed!\n"); + return ret; + } + + ret = sensor_hub_device_open(hsdev); + if (ret) { + dev_err(&pdev->dev, "failed to open sensor hub device!\n"); + goto err_open; + } + + /* + * Enable HID input processing early in order to be able to read the + * clock already in devm_rtc_device_register(). + */ + hid_device_io_start(hsdev->hdev); + + time_state->rtc = devm_rtc_device_register(&pdev->dev, + "hid-sensor-time", &hid_time_rtc_ops, + THIS_MODULE); + + if (IS_ERR_OR_NULL(time_state->rtc)) { + hid_device_io_stop(hsdev->hdev); + ret = time_state->rtc ? PTR_ERR(time_state->rtc) : -ENODEV; + time_state->rtc = NULL; + dev_err(&pdev->dev, "rtc device register failed!\n"); + goto err_rtc; + } + + return ret; + +err_rtc: + sensor_hub_device_close(hsdev); +err_open: + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME); + return ret; +} + +static int hid_time_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev); + + sensor_hub_device_close(hsdev); + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME); + + return 0; +} + +static struct platform_device_id hid_time_ids[] = { + { + /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ + .name = "HID-SENSOR-2000a0", + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, hid_time_ids); + +static struct platform_driver hid_time_platform_driver = { + .id_table = hid_time_ids, + .driver = { + .name = KBUILD_MODNAME, + .owner = THIS_MODULE, + }, + .probe = hid_time_probe, + .remove = hid_time_remove, +}; +module_platform_driver(hid_time_platform_driver); + +MODULE_DESCRIPTION("HID Sensor Time"); +MODULE_AUTHOR("Alexander Holler <holler@ahsoftware.de>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c new file mode 100644 index 00000000000..b936bb4096b --- /dev/null +++ b/drivers/rtc/rtc-hym8563.c @@ -0,0 +1,612 @@ +/* + * Haoyu HYM8563 RTC driver + * + * Copyright (C) 2013 MundoReader S.L. + * Author: Heiko Stuebner <heiko@sntech.de> + * + * based on rtc-HYM8563 + * Copyright (C) 2010 ROCKCHIP, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/clk-provider.h> +#include <linux/i2c.h> +#include <linux/bcd.h> +#include <linux/rtc.h> + +#define HYM8563_CTL1 0x00 +#define HYM8563_CTL1_TEST BIT(7) +#define HYM8563_CTL1_STOP BIT(5) +#define HYM8563_CTL1_TESTC BIT(3) + +#define HYM8563_CTL2 0x01 +#define HYM8563_CTL2_TI_TP BIT(4) +#define HYM8563_CTL2_AF BIT(3) +#define HYM8563_CTL2_TF BIT(2) +#define HYM8563_CTL2_AIE BIT(1) +#define HYM8563_CTL2_TIE BIT(0) + +#define HYM8563_SEC 0x02 +#define HYM8563_SEC_VL BIT(7) +#define HYM8563_SEC_MASK 0x7f + +#define HYM8563_MIN 0x03 +#define HYM8563_MIN_MASK 0x7f + +#define HYM8563_HOUR 0x04 +#define HYM8563_HOUR_MASK 0x3f + +#define HYM8563_DAY 0x05 +#define HYM8563_DAY_MASK 0x3f + +#define HYM8563_WEEKDAY 0x06 +#define HYM8563_WEEKDAY_MASK 0x07 + +#define HYM8563_MONTH 0x07 +#define HYM8563_MONTH_CENTURY BIT(7) +#define HYM8563_MONTH_MASK 0x1f + +#define HYM8563_YEAR 0x08 + +#define HYM8563_ALM_MIN 0x09 +#define HYM8563_ALM_HOUR 0x0a +#define HYM8563_ALM_DAY 0x0b +#define HYM8563_ALM_WEEK 0x0c + +/* Each alarm check can be disabled by setting this bit in the register */ +#define HYM8563_ALM_BIT_DISABLE BIT(7) + +#define HYM8563_CLKOUT 0x0d +#define HYM8563_CLKOUT_DISABLE BIT(7) +#define HYM8563_CLKOUT_32768 0 +#define HYM8563_CLKOUT_1024 1 +#define HYM8563_CLKOUT_32 2 +#define HYM8563_CLKOUT_1 3 +#define HYM8563_CLKOUT_MASK 3 + +#define HYM8563_TMR_CTL 0x0e +#define HYM8563_TMR_CTL_ENABLE BIT(7) +#define HYM8563_TMR_CTL_4096 0 +#define HYM8563_TMR_CTL_64 1 +#define HYM8563_TMR_CTL_1 2 +#define HYM8563_TMR_CTL_1_60 3 +#define HYM8563_TMR_CTL_MASK 3 + +#define HYM8563_TMR_CNT 0x0f + +struct hym8563 { + struct i2c_client *client; + struct rtc_device *rtc; + bool valid; +#ifdef CONFIG_COMMON_CLK + struct clk_hw clkout_hw; +#endif +}; + +/* + * RTC handling + */ + +static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct hym8563 *hym8563 = i2c_get_clientdata(client); + u8 buf[7]; + int ret; + + if (!hym8563->valid) { + dev_warn(&client->dev, "no valid clock/calendar values available\n"); + return -EPERM; + } + + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf); + + tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK); + tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK); + tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK); + tm->tm_mday = bcd2bin(buf[3] & HYM8563_DAY_MASK); + tm->tm_wday = bcd2bin(buf[4] & HYM8563_WEEKDAY_MASK); /* 0 = Sun */ + tm->tm_mon = bcd2bin(buf[5] & HYM8563_MONTH_MASK) - 1; /* 0 = Jan */ + tm->tm_year = bcd2bin(buf[6]) + 100; + + return 0; +} + +static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct hym8563 *hym8563 = i2c_get_clientdata(client); + u8 buf[7]; + int ret; + + /* Years >= 2100 are to far in the future, 19XX is to early */ + if (tm->tm_year < 100 || tm->tm_year >= 200) + return -EINVAL; + + buf[0] = bin2bcd(tm->tm_sec); + buf[1] = bin2bcd(tm->tm_min); + buf[2] = bin2bcd(tm->tm_hour); + buf[3] = bin2bcd(tm->tm_mday); + buf[4] = bin2bcd(tm->tm_wday); + buf[5] = bin2bcd(tm->tm_mon + 1); + + /* + * While the HYM8563 has a century flag in the month register, + * it does not seem to carry it over a subsequent write/read. + * So we'll limit ourself to 100 years, starting at 2000 for now. + */ + buf[6] = tm->tm_year - 100; + + /* + * CTL1 only contains TEST-mode bits apart from stop, + * so no need to read the value first + */ + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, + HYM8563_CTL1_STOP); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_SEC, 7, buf); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); + if (ret < 0) + return ret; + + hym8563->valid = true; + + return 0; +} + +static int hym8563_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct i2c_client *client = to_i2c_client(dev); + int data; + + data = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (data < 0) + return data; + + if (enabled) + data |= HYM8563_CTL2_AIE; + else + data &= ~HYM8563_CTL2_AIE; + + return i2c_smbus_write_byte_data(client, HYM8563_CTL2, data); +}; + +static int hym8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rtc_time *alm_tm = &alm->time; + u8 buf[4]; + int ret; + + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); + if (ret < 0) + return ret; + + /* The alarm only has a minute accuracy */ + alm_tm->tm_sec = -1; + + alm_tm->tm_min = (buf[0] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[0] & HYM8563_MIN_MASK); + alm_tm->tm_hour = (buf[1] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[1] & HYM8563_HOUR_MASK); + alm_tm->tm_mday = (buf[2] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[2] & HYM8563_DAY_MASK); + alm_tm->tm_wday = (buf[3] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[3] & HYM8563_WEEKDAY_MASK); + + alm_tm->tm_mon = -1; + alm_tm->tm_year = -1; + + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (ret < 0) + return ret; + + if (ret & HYM8563_CTL2_AIE) + alm->enabled = 1; + + return 0; +} + +static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rtc_time *alm_tm = &alm->time; + u8 buf[4]; + int ret; + + /* + * The alarm has no seconds so deal with it + */ + if (alm_tm->tm_sec) { + alm_tm->tm_sec = 0; + alm_tm->tm_min++; + if (alm_tm->tm_min >= 60) { + alm_tm->tm_min = 0; + alm_tm->tm_hour++; + if (alm_tm->tm_hour >= 24) { + alm_tm->tm_hour = 0; + alm_tm->tm_mday++; + if (alm_tm->tm_mday > 31) + alm_tm->tm_mday = 0; + } + } + } + + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (ret < 0) + return ret; + + ret &= ~HYM8563_CTL2_AIE; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); + if (ret < 0) + return ret; + + buf[0] = (alm_tm->tm_min < 60 && alm_tm->tm_min >= 0) ? + bin2bcd(alm_tm->tm_min) : HYM8563_ALM_BIT_DISABLE; + + buf[1] = (alm_tm->tm_hour < 24 && alm_tm->tm_hour >= 0) ? + bin2bcd(alm_tm->tm_hour) : HYM8563_ALM_BIT_DISABLE; + + buf[2] = (alm_tm->tm_mday <= 31 && alm_tm->tm_mday >= 1) ? + bin2bcd(alm_tm->tm_mday) : HYM8563_ALM_BIT_DISABLE; + + buf[3] = (alm_tm->tm_wday < 7 && alm_tm->tm_wday >= 0) ? + bin2bcd(alm_tm->tm_wday) : HYM8563_ALM_BIT_DISABLE; + + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); + if (ret < 0) + return ret; + + return hym8563_rtc_alarm_irq_enable(dev, alm->enabled); +} + +static const struct rtc_class_ops hym8563_rtc_ops = { + .read_time = hym8563_rtc_read_time, + .set_time = hym8563_rtc_set_time, + .alarm_irq_enable = hym8563_rtc_alarm_irq_enable, + .read_alarm = hym8563_rtc_read_alarm, + .set_alarm = hym8563_rtc_set_alarm, +}; + +/* + * Handling of the clkout + */ + +#ifdef CONFIG_COMMON_CLK +#define clkout_hw_to_hym8563(_hw) container_of(_hw, struct hym8563, clkout_hw) + +static int clkout_rates[] = { + 32768, + 1024, + 32, + 1, +}; + +static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + + if (ret < 0 || ret & HYM8563_CLKOUT_DISABLE) + return 0; + + ret &= HYM8563_CLKOUT_MASK; + return clkout_rates[ret]; +} + +static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) + if (clkout_rates[i] <= rate) + return clkout_rates[i]; + + return 0; +} + +static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + int i; + + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) + if (clkout_rates[i] == rate) { + ret &= ~HYM8563_CLKOUT_MASK; + ret |= i; + return i2c_smbus_write_byte_data(client, + HYM8563_CLKOUT, ret); + } + + return -EINVAL; +} + +static int hym8563_clkout_control(struct clk_hw *hw, bool enable) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + + if (ret < 0) + return ret; + + if (enable) + ret &= ~HYM8563_CLKOUT_DISABLE; + else + ret |= HYM8563_CLKOUT_DISABLE; + + return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret); +} + +static int hym8563_clkout_prepare(struct clk_hw *hw) +{ + return hym8563_clkout_control(hw, 1); +} + +static void hym8563_clkout_unprepare(struct clk_hw *hw) +{ + hym8563_clkout_control(hw, 0); +} + +static int hym8563_clkout_is_prepared(struct clk_hw *hw) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + + if (ret < 0) + return ret; + + return !(ret & HYM8563_CLKOUT_DISABLE); +} + +static const struct clk_ops hym8563_clkout_ops = { + .prepare = hym8563_clkout_prepare, + .unprepare = hym8563_clkout_unprepare, + .is_prepared = hym8563_clkout_is_prepared, + .recalc_rate = hym8563_clkout_recalc_rate, + .round_rate = hym8563_clkout_round_rate, + .set_rate = hym8563_clkout_set_rate, +}; + +static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563) +{ + struct i2c_client *client = hym8563->client; + struct device_node *node = client->dev.of_node; + struct clk *clk; + struct clk_init_data init; + int ret; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, + HYM8563_CLKOUT_DISABLE); + if (ret < 0) + return ERR_PTR(ret); + + init.name = "hym8563-clkout"; + init.ops = &hym8563_clkout_ops; + init.flags = CLK_IS_ROOT; + init.parent_names = NULL; + init.num_parents = 0; + hym8563->clkout_hw.init = &init; + + /* optional override of the clockname */ + of_property_read_string(node, "clock-output-names", &init.name); + + /* register the clock */ + clk = clk_register(&client->dev, &hym8563->clkout_hw); + + if (!IS_ERR(clk)) + of_clk_add_provider(node, of_clk_src_simple_get, clk); + + return clk; +} +#endif + +/* + * The alarm interrupt is implemented as a level-low interrupt in the + * hym8563, while the timer interrupt uses a falling edge. + * We don't use the timer at all, so the interrupt is requested to + * use the level-low trigger. + */ +static irqreturn_t hym8563_irq(int irq, void *dev_id) +{ + struct hym8563 *hym8563 = (struct hym8563 *)dev_id; + struct i2c_client *client = hym8563->client; + struct mutex *lock = &hym8563->rtc->ops_lock; + int data, ret; + + mutex_lock(lock); + + /* Clear the alarm flag */ + + data = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (data < 0) { + dev_err(&client->dev, "%s: error reading i2c data %d\n", + __func__, data); + goto out; + } + + data &= ~HYM8563_CTL2_AF; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, data); + if (ret < 0) { + dev_err(&client->dev, "%s: error writing i2c data %d\n", + __func__, ret); + } + +out: + mutex_unlock(lock); + return IRQ_HANDLED; +} + +static int hym8563_init_device(struct i2c_client *client) +{ + int ret; + + /* Clear stop flag if present */ + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (ret < 0) + return ret; + + /* Disable alarm and timer interrupts */ + ret &= ~HYM8563_CTL2_AIE; + ret &= ~HYM8563_CTL2_TIE; + + /* Clear any pending alarm and timer flags */ + if (ret & HYM8563_CTL2_AF) + ret &= ~HYM8563_CTL2_AF; + + if (ret & HYM8563_CTL2_TF) + ret &= ~HYM8563_CTL2_TF; + + ret &= ~HYM8563_CTL2_TI_TP; + + return i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); +} + +#ifdef CONFIG_PM_SLEEP +static int hym8563_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + int ret; + + if (device_may_wakeup(dev)) { + ret = enable_irq_wake(client->irq); + if (ret) { + dev_err(dev, "enable_irq_wake failed, %d\n", ret); + return ret; + } + } + + return 0; +} + +static int hym8563_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(client->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume); + +static int hym8563_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct hym8563 *hym8563; + int ret; + + hym8563 = devm_kzalloc(&client->dev, sizeof(*hym8563), GFP_KERNEL); + if (!hym8563) + return -ENOMEM; + + hym8563->client = client; + i2c_set_clientdata(client, hym8563); + + device_set_wakeup_capable(&client->dev, true); + + ret = hym8563_init_device(client); + if (ret) { + dev_err(&client->dev, "could not init device, %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(&client->dev, client->irq, + NULL, hym8563_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + client->name, hym8563); + if (ret < 0) { + dev_err(&client->dev, "irq %d request failed, %d\n", + client->irq, ret); + return ret; + } + + /* check state of calendar information */ + ret = i2c_smbus_read_byte_data(client, HYM8563_SEC); + if (ret < 0) + return ret; + + hym8563->valid = !(ret & HYM8563_SEC_VL); + dev_dbg(&client->dev, "rtc information is %s\n", + hym8563->valid ? "valid" : "invalid"); + + hym8563->rtc = devm_rtc_device_register(&client->dev, client->name, + &hym8563_rtc_ops, THIS_MODULE); + if (IS_ERR(hym8563->rtc)) + return PTR_ERR(hym8563->rtc); + + /* the hym8563 alarm only supports a minute accuracy */ + hym8563->rtc->uie_unsupported = 1; + +#ifdef CONFIG_COMMON_CLK + hym8563_clkout_register_clk(hym8563); +#endif + + return 0; +} + +static const struct i2c_device_id hym8563_id[] = { + { "hym8563", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, hym8563_id); + +static const struct of_device_id hym8563_dt_idtable[] = { + { .compatible = "haoyu,hym8563" }, + {}, +}; +MODULE_DEVICE_TABLE(of, hym8563_dt_idtable); + +static struct i2c_driver hym8563_driver = { + .driver = { + .name = "rtc-hym8563", + .owner = THIS_MODULE, + .pm = &hym8563_pm_ops, + .of_match_table = hym8563_dt_idtable, + }, + .probe = hym8563_probe, + .id_table = hym8563_id, +}; + +module_i2c_driver(hym8563_driver); + +MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); +MODULE_DESCRIPTION("HYM8563 RTC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c index 2dd3c016327..cd741c77e08 100644 --- a/drivers/rtc/rtc-imxdi.c +++ b/drivers/rtc/rtc-imxdi.c @@ -35,7 +35,10 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/rtc.h> +#include <linux/sched.h> +#include <linux/spinlock.h> #include <linux/workqueue.h> +#include <linux/of.h> /* DryIce Register Definitions */ @@ -366,30 +369,24 @@ static void dryice_work(struct work_struct *work) /* * probe for dryice rtc device */ -static int dryice_rtc_probe(struct platform_device *pdev) +static int __init dryice_rtc_probe(struct platform_device *pdev) { struct resource *res; struct imxdi_dev *imxdi; int rc; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - imxdi = devm_kzalloc(&pdev->dev, sizeof(*imxdi), GFP_KERNEL); if (!imxdi) return -ENOMEM; imxdi->pdev = pdev; - if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res), - pdev->name)) - return -EBUSY; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + imxdi->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(imxdi->ioaddr)) + return PTR_ERR(imxdi->ioaddr); - imxdi->ioaddr = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); - if (imxdi->ioaddr == NULL) - return -ENOMEM; + spin_lock_init(&imxdi->irq_lock); imxdi->irq = platform_get_irq(pdev, 0); if (imxdi->irq < 0) @@ -401,10 +398,12 @@ static int dryice_rtc_probe(struct platform_device *pdev) mutex_init(&imxdi->write_mutex); - imxdi->clk = clk_get(&pdev->dev, NULL); + imxdi->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(imxdi->clk)) return PTR_ERR(imxdi->clk); - clk_enable(imxdi->clk); + rc = clk_prepare_enable(imxdi->clk); + if (rc) + return rc; /* * Initialize dryice hardware @@ -459,7 +458,7 @@ static int dryice_rtc_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, imxdi); - imxdi->rtc = rtc_device_register(pdev->name, &pdev->dev, + imxdi->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &dryice_rtc_ops, THIS_MODULE); if (IS_ERR(imxdi->rtc)) { rc = PTR_ERR(imxdi->rtc); @@ -469,13 +468,12 @@ static int dryice_rtc_probe(struct platform_device *pdev) return 0; err: - clk_disable(imxdi->clk); - clk_put(imxdi->clk); + clk_disable_unprepare(imxdi->clk); return rc; } -static int __devexit dryice_rtc_remove(struct platform_device *pdev) +static int __exit dryice_rtc_remove(struct platform_device *pdev) { struct imxdi_dev *imxdi = platform_get_drvdata(pdev); @@ -484,34 +482,30 @@ static int __devexit dryice_rtc_remove(struct platform_device *pdev) /* mask all interrupts */ __raw_writel(0, imxdi->ioaddr + DIER); - rtc_device_unregister(imxdi->rtc); - - clk_disable(imxdi->clk); - clk_put(imxdi->clk); + clk_disable_unprepare(imxdi->clk); return 0; } +#ifdef CONFIG_OF +static const struct of_device_id dryice_dt_ids[] = { + { .compatible = "fsl,imx25-rtc" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, dryice_dt_ids); +#endif + static struct platform_driver dryice_rtc_driver = { .driver = { .name = "imxdi_rtc", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(dryice_dt_ids), }, - .remove = __devexit_p(dryice_rtc_remove), + .remove = __exit_p(dryice_rtc_remove), }; -static int __init dryice_rtc_init(void) -{ - return platform_driver_probe(&dryice_rtc_driver, dryice_rtc_probe); -} - -static void __exit dryice_rtc_exit(void) -{ - platform_driver_unregister(&dryice_rtc_driver); -} - -module_init(dryice_rtc_init); -module_exit(dryice_rtc_exit); +module_platform_driver_probe(dryice_rtc_driver, dryice_rtc_probe); MODULE_AUTHOR("Freescale Semiconductor, Inc."); MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c index ddbc797ea6c..03b89112942 100644 --- a/drivers/rtc/rtc-isl12022.c +++ b/drivers/rtc/rtc-isl12022.c @@ -15,6 +15,8 @@ #include <linux/bcd.h> #include <linux/rtc.h> #include <linux/slab.h> +#include <linux/module.h> +#include <linux/err.h> #define DRV_VERSION "0.1" @@ -226,7 +228,7 @@ static int isl12022_set_datetime(struct i2c_client *client, struct rtc_time *tm) buf[ISL12022_REG_SC + i]); if (ret) return -EIO; - }; + } return 0; } @@ -251,12 +253,11 @@ static int isl12022_probe(struct i2c_client *client, { struct isl12022 *isl12022; - int ret = 0; - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -ENODEV; - isl12022 = kzalloc(sizeof(struct isl12022), GFP_KERNEL); + isl12022 = devm_kzalloc(&client->dev, sizeof(struct isl12022), + GFP_KERNEL); if (!isl12022) return -ENOMEM; @@ -264,37 +265,14 @@ static int isl12022_probe(struct i2c_client *client, i2c_set_clientdata(client, isl12022); - isl12022->rtc = rtc_device_register(isl12022_driver.driver.name, - &client->dev, - &isl12022_rtc_ops, - THIS_MODULE); - - if (IS_ERR(isl12022->rtc)) { - ret = PTR_ERR(isl12022->rtc); - goto exit_kfree; - } - - return 0; - -exit_kfree: - kfree(isl12022); - - return ret; -} - -static int isl12022_remove(struct i2c_client *client) -{ - struct isl12022 *isl12022 = i2c_get_clientdata(client); - - rtc_device_unregister(isl12022->rtc); - kfree(isl12022); - - return 0; + isl12022->rtc = devm_rtc_device_register(&client->dev, + isl12022_driver.driver.name, + &isl12022_rtc_ops, THIS_MODULE); + return PTR_ERR_OR_ZERO(isl12022->rtc); } static const struct i2c_device_id isl12022_id[] = { { "isl12022", 0 }, - { "rtc8564", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, isl12022_id); @@ -304,22 +282,10 @@ static struct i2c_driver isl12022_driver = { .name = "rtc-isl12022", }, .probe = isl12022_probe, - .remove = isl12022_remove, .id_table = isl12022_id, }; -static int __init isl12022_init(void) -{ - return i2c_add_driver(&isl12022_driver); -} - -static void __exit isl12022_exit(void) -{ - i2c_del_driver(&isl12022_driver); -} - -module_init(isl12022_init); -module_exit(isl12022_exit); +module_i2c_driver(isl12022_driver); MODULE_AUTHOR("roman.fietze@telemotive.de"); MODULE_DESCRIPTION("ISL 12022 RTC driver"); diff --git a/drivers/rtc/rtc-isl12057.c b/drivers/rtc/rtc-isl12057.c new file mode 100644 index 00000000000..455b601d731 --- /dev/null +++ b/drivers/rtc/rtc-isl12057.c @@ -0,0 +1,306 @@ +/* + * rtc-isl12057 - Driver for Intersil ISL12057 I2C Real Time Clock + * + * Copyright (C) 2013, Arnaud EBALARD <arno@natisbad.org> + * + * This work is largely based on Intersil ISL1208 driver developed by + * Hebert Valerio Riedel <hvr@gnu.org>. + * + * Detailed datasheet on which this development is based is available here: + * + * http://natisbad.org/NAS2/refs/ISL12057.pdf + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/rtc.h> +#include <linux/i2c.h> +#include <linux/bcd.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/regmap.h> + +#define DRV_NAME "rtc-isl12057" + +/* RTC section */ +#define ISL12057_REG_RTC_SC 0x00 /* Seconds */ +#define ISL12057_REG_RTC_MN 0x01 /* Minutes */ +#define ISL12057_REG_RTC_HR 0x02 /* Hours */ +#define ISL12057_REG_RTC_HR_PM BIT(5) /* AM/PM bit in 12h format */ +#define ISL12057_REG_RTC_HR_MIL BIT(6) /* 24h/12h format */ +#define ISL12057_REG_RTC_DW 0x03 /* Day of the Week */ +#define ISL12057_REG_RTC_DT 0x04 /* Date */ +#define ISL12057_REG_RTC_MO 0x05 /* Month */ +#define ISL12057_REG_RTC_YR 0x06 /* Year */ +#define ISL12057_RTC_SEC_LEN 7 + +/* Alarm 1 section */ +#define ISL12057_REG_A1_SC 0x07 /* Alarm 1 Seconds */ +#define ISL12057_REG_A1_MN 0x08 /* Alarm 1 Minutes */ +#define ISL12057_REG_A1_HR 0x09 /* Alarm 1 Hours */ +#define ISL12057_REG_A1_HR_PM BIT(5) /* AM/PM bit in 12h format */ +#define ISL12057_REG_A1_HR_MIL BIT(6) /* 24h/12h format */ +#define ISL12057_REG_A1_DWDT 0x0A /* Alarm 1 Date / Day of the week */ +#define ISL12057_REG_A1_DWDT_B BIT(6) /* DW / DT selection bit */ +#define ISL12057_A1_SEC_LEN 4 + +/* Alarm 2 section */ +#define ISL12057_REG_A2_MN 0x0B /* Alarm 2 Minutes */ +#define ISL12057_REG_A2_HR 0x0C /* Alarm 2 Hours */ +#define ISL12057_REG_A2_DWDT 0x0D /* Alarm 2 Date / Day of the week */ +#define ISL12057_A2_SEC_LEN 3 + +/* Control/Status registers */ +#define ISL12057_REG_INT 0x0E +#define ISL12057_REG_INT_A1IE BIT(0) /* Alarm 1 interrupt enable bit */ +#define ISL12057_REG_INT_A2IE BIT(1) /* Alarm 2 interrupt enable bit */ +#define ISL12057_REG_INT_INTCN BIT(2) /* Interrupt control enable bit */ +#define ISL12057_REG_INT_RS1 BIT(3) /* Freq out control bit 1 */ +#define ISL12057_REG_INT_RS2 BIT(4) /* Freq out control bit 2 */ +#define ISL12057_REG_INT_EOSC BIT(7) /* Oscillator enable bit */ + +#define ISL12057_REG_SR 0x0F +#define ISL12057_REG_SR_A1F BIT(0) /* Alarm 1 interrupt bit */ +#define ISL12057_REG_SR_A2F BIT(1) /* Alarm 2 interrupt bit */ +#define ISL12057_REG_SR_OSF BIT(7) /* Oscillator failure bit */ + +/* Register memory map length */ +#define ISL12057_MEM_MAP_LEN 0x10 + +struct isl12057_rtc_data { + struct regmap *regmap; + struct mutex lock; +}; + +static void isl12057_rtc_regs_to_tm(struct rtc_time *tm, u8 *regs) +{ + tm->tm_sec = bcd2bin(regs[ISL12057_REG_RTC_SC]); + tm->tm_min = bcd2bin(regs[ISL12057_REG_RTC_MN]); + + if (regs[ISL12057_REG_RTC_HR] & ISL12057_REG_RTC_HR_MIL) { /* AM/PM */ + tm->tm_hour = bcd2bin(regs[ISL12057_REG_RTC_HR] & 0x0f); + if (regs[ISL12057_REG_RTC_HR] & ISL12057_REG_RTC_HR_PM) + tm->tm_hour += 12; + } else { /* 24 hour mode */ + tm->tm_hour = bcd2bin(regs[ISL12057_REG_RTC_HR] & 0x3f); + } + + tm->tm_mday = bcd2bin(regs[ISL12057_REG_RTC_DT]); + tm->tm_wday = bcd2bin(regs[ISL12057_REG_RTC_DW]) - 1; /* starts at 1 */ + tm->tm_mon = bcd2bin(regs[ISL12057_REG_RTC_MO]) - 1; /* starts at 1 */ + tm->tm_year = bcd2bin(regs[ISL12057_REG_RTC_YR]) + 100; +} + +static int isl12057_rtc_tm_to_regs(u8 *regs, struct rtc_time *tm) +{ + /* + * The clock has an 8 bit wide bcd-coded register for the year. + * tm_year is an offset from 1900 and we are interested in the + * 2000-2099 range, so any value less than 100 is invalid. + */ + if (tm->tm_year < 100) + return -EINVAL; + + regs[ISL12057_REG_RTC_SC] = bin2bcd(tm->tm_sec); + regs[ISL12057_REG_RTC_MN] = bin2bcd(tm->tm_min); + regs[ISL12057_REG_RTC_HR] = bin2bcd(tm->tm_hour); /* 24-hour format */ + regs[ISL12057_REG_RTC_DT] = bin2bcd(tm->tm_mday); + regs[ISL12057_REG_RTC_MO] = bin2bcd(tm->tm_mon + 1); + regs[ISL12057_REG_RTC_YR] = bin2bcd(tm->tm_year - 100); + regs[ISL12057_REG_RTC_DW] = bin2bcd(tm->tm_wday + 1); + + return 0; +} + +/* + * Try and match register bits w/ fixed null values to see whether we + * are dealing with an ISL12057. Note: this function is called early + * during init and hence does need mutex protection. + */ +static int isl12057_i2c_validate_chip(struct regmap *regmap) +{ + u8 regs[ISL12057_MEM_MAP_LEN]; + static const u8 mask[ISL12057_MEM_MAP_LEN] = { 0x80, 0x80, 0x80, 0xf8, + 0xc0, 0x60, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x60, 0x7c }; + int ret, i; + + ret = regmap_bulk_read(regmap, 0, regs, ISL12057_MEM_MAP_LEN); + if (ret) + return ret; + + for (i = 0; i < ISL12057_MEM_MAP_LEN; ++i) { + if (regs[i] & mask[i]) /* check if bits are cleared */ + return -ENODEV; + } + + return 0; +} + +static int isl12057_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct isl12057_rtc_data *data = dev_get_drvdata(dev); + u8 regs[ISL12057_RTC_SEC_LEN]; + int ret; + + mutex_lock(&data->lock); + ret = regmap_bulk_read(data->regmap, ISL12057_REG_RTC_SC, regs, + ISL12057_RTC_SEC_LEN); + mutex_unlock(&data->lock); + + if (ret) { + dev_err(dev, "%s: RTC read failed\n", __func__); + return ret; + } + + isl12057_rtc_regs_to_tm(tm, regs); + + return rtc_valid_tm(tm); +} + +static int isl12057_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct isl12057_rtc_data *data = dev_get_drvdata(dev); + u8 regs[ISL12057_RTC_SEC_LEN]; + int ret; + + ret = isl12057_rtc_tm_to_regs(regs, tm); + if (ret) + return ret; + + mutex_lock(&data->lock); + ret = regmap_bulk_write(data->regmap, ISL12057_REG_RTC_SC, regs, + ISL12057_RTC_SEC_LEN); + mutex_unlock(&data->lock); + + if (ret) + dev_err(dev, "%s: RTC write failed\n", __func__); + + return ret; +} + +/* + * Check current RTC status and enable/disable what needs to be. Return 0 if + * everything went ok and a negative value upon error. Note: this function + * is called early during init and hence does need mutex protection. + */ +static int isl12057_check_rtc_status(struct device *dev, struct regmap *regmap) +{ + int ret; + + /* Enable oscillator if not already running */ + ret = regmap_update_bits(regmap, ISL12057_REG_INT, + ISL12057_REG_INT_EOSC, 0); + if (ret < 0) { + dev_err(dev, "Unable to enable oscillator\n"); + return ret; + } + + /* Clear oscillator failure bit if needed */ + ret = regmap_update_bits(regmap, ISL12057_REG_SR, + ISL12057_REG_SR_OSF, 0); + if (ret < 0) { + dev_err(dev, "Unable to clear oscillator failure bit\n"); + return ret; + } + + /* Clear alarm bit if needed */ + ret = regmap_update_bits(regmap, ISL12057_REG_SR, + ISL12057_REG_SR_A1F, 0); + if (ret < 0) { + dev_err(dev, "Unable to clear alarm bit\n"); + return ret; + } + + return 0; +} + +static const struct rtc_class_ops rtc_ops = { + .read_time = isl12057_rtc_read_time, + .set_time = isl12057_rtc_set_time, +}; + +static struct regmap_config isl12057_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int isl12057_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct isl12057_rtc_data *data; + struct rtc_device *rtc; + struct regmap *regmap; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C | + I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_I2C_BLOCK)) + return -ENODEV; + + regmap = devm_regmap_init_i2c(client, &isl12057_rtc_regmap_config); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(dev, "regmap allocation failed: %d\n", ret); + return ret; + } + + ret = isl12057_i2c_validate_chip(regmap); + if (ret) + return ret; + + ret = isl12057_check_rtc_status(dev, regmap); + if (ret) + return ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + mutex_init(&data->lock); + data->regmap = regmap; + dev_set_drvdata(dev, data); + + rtc = devm_rtc_device_register(dev, DRV_NAME, &rtc_ops, THIS_MODULE); + return PTR_ERR_OR_ZERO(rtc); +} + +#ifdef CONFIG_OF +static const struct of_device_id isl12057_dt_match[] = { + { .compatible = "isl,isl12057" }, + { }, +}; +#endif + +static const struct i2c_device_id isl12057_id[] = { + { "isl12057", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, isl12057_id); + +static struct i2c_driver isl12057_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(isl12057_dt_match), + }, + .probe = isl12057_probe, + .id_table = isl12057_id, +}; +module_i2c_driver(isl12057_driver); + +MODULE_AUTHOR("Arnaud EBALARD <arno@natisbad.org>"); +MODULE_DESCRIPTION("Intersil ISL12057 RTC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index 468200c38ec..c3c549d511b 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -39,6 +39,8 @@ #define ISL1208_REG_SR_BAT (1<<1) /* battery */ #define ISL1208_REG_SR_RTCF (1<<0) /* rtc fail */ #define ISL1208_REG_INT 0x08 +#define ISL1208_REG_INT_ALME (1<<6) /* alarm enable */ +#define ISL1208_REG_INT_IM (1<<7) /* interrupt/alarm mode */ #define ISL1208_REG_09 0x09 /* reserved */ #define ISL1208_REG_ATR 0x0a #define ISL1208_REG_DTR 0x0b @@ -66,9 +68,17 @@ isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[], { u8 reg_addr[1] = { reg }; struct i2c_msg msgs[2] = { - {client->addr, 0, sizeof(reg_addr), reg_addr} - , - {client->addr, I2C_M_RD, len, buf} + { + .addr = client->addr, + .len = sizeof(reg_addr), + .buf = reg_addr + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = len, + .buf = buf + } }; int ret; @@ -88,7 +98,11 @@ isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[], { u8 i2c_buf[ISL1208_REG_USR2 + 2]; struct i2c_msg msgs[1] = { - {client->addr, 0, len + 1, i2c_buf} + { + .addr = client->addr, + .len = len + 1, + .buf = i2c_buf + } }; int ret; @@ -104,7 +118,7 @@ isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[], return ret; } -/* simple check to see wether we have a isl1208 */ +/* simple check to see whether we have a isl1208 */ static int isl1208_i2c_validate_client(struct i2c_client *client) { @@ -130,11 +144,7 @@ isl1208_i2c_validate_client(struct i2c_client *client) static int isl1208_i2c_get_sr(struct i2c_client *client) { - int sr = i2c_smbus_read_byte_data(client, ISL1208_REG_SR); - if (sr < 0) - return -EIO; - - return sr; + return i2c_smbus_read_byte_data(client, ISL1208_REG_SR); } static int @@ -202,6 +212,30 @@ isl1208_i2c_set_usr(struct i2c_client *client, u16 usr) } static int +isl1208_rtc_toggle_alarm(struct i2c_client *client, int enable) +{ + int icr = i2c_smbus_read_byte_data(client, ISL1208_REG_INT); + + if (icr < 0) { + dev_err(&client->dev, "%s: reading INT failed\n", __func__); + return icr; + } + + if (enable) + icr |= ISL1208_REG_INT_ALME | ISL1208_REG_INT_IM; + else + icr &= ~(ISL1208_REG_INT_ALME | ISL1208_REG_INT_IM); + + icr = i2c_smbus_write_byte_data(client, ISL1208_REG_INT, icr); + if (icr < 0) { + dev_err(&client->dev, "%s: writing INT failed\n", __func__); + return icr; + } + + return 0; +} + +static int isl1208_rtc_proc(struct device *dev, struct seq_file *seq) { struct i2c_client *const client = to_i2c_client(dev); @@ -288,9 +322,8 @@ isl1208_i2c_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) { struct rtc_time *const tm = &alarm->time; u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, }; - int sr; + int icr, yr, sr = isl1208_i2c_get_sr(client); - sr = isl1208_i2c_get_sr(client); if (sr < 0) { dev_err(&client->dev, "%s: reading SR failed\n", __func__); return sr; @@ -313,6 +346,73 @@ isl1208_i2c_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) bcd2bin(regs[ISL1208_REG_MOA - ISL1208_REG_SCA] & 0x1f) - 1; tm->tm_wday = bcd2bin(regs[ISL1208_REG_DWA - ISL1208_REG_SCA] & 0x03); + /* The alarm doesn't store the year so get it from the rtc section */ + yr = i2c_smbus_read_byte_data(client, ISL1208_REG_YR); + if (yr < 0) { + dev_err(&client->dev, "%s: reading RTC YR failed\n", __func__); + return yr; + } + tm->tm_year = bcd2bin(yr) + 100; + + icr = i2c_smbus_read_byte_data(client, ISL1208_REG_INT); + if (icr < 0) { + dev_err(&client->dev, "%s: reading INT failed\n", __func__); + return icr; + } + alarm->enabled = !!(icr & ISL1208_REG_INT_ALME); + + return 0; +} + +static int +isl1208_i2c_set_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) +{ + struct rtc_time *alarm_tm = &alarm->time; + u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, }; + const int offs = ISL1208_REG_SCA; + unsigned long rtc_secs, alarm_secs; + struct rtc_time rtc_tm; + int err, enable; + + err = isl1208_i2c_read_time(client, &rtc_tm); + if (err) + return err; + err = rtc_tm_to_time(&rtc_tm, &rtc_secs); + if (err) + return err; + err = rtc_tm_to_time(alarm_tm, &alarm_secs); + if (err) + return err; + + /* If the alarm time is before the current time disable the alarm */ + if (!alarm->enabled || alarm_secs <= rtc_secs) + enable = 0x00; + else + enable = 0x80; + + /* Program the alarm and enable it for each setting */ + regs[ISL1208_REG_SCA - offs] = bin2bcd(alarm_tm->tm_sec) | enable; + regs[ISL1208_REG_MNA - offs] = bin2bcd(alarm_tm->tm_min) | enable; + regs[ISL1208_REG_HRA - offs] = bin2bcd(alarm_tm->tm_hour) | + ISL1208_REG_HR_MIL | enable; + + regs[ISL1208_REG_DTA - offs] = bin2bcd(alarm_tm->tm_mday) | enable; + regs[ISL1208_REG_MOA - offs] = bin2bcd(alarm_tm->tm_mon + 1) | enable; + regs[ISL1208_REG_DWA - offs] = bin2bcd(alarm_tm->tm_wday & 7) | enable; + + /* write ALARM registers */ + err = isl1208_i2c_set_regs(client, offs, regs, + ISL1208_ALARM_SECTION_LEN); + if (err < 0) { + dev_err(&client->dev, "%s: writing ALARM section failed\n", + __func__); + return err; + } + + err = isl1208_rtc_toggle_alarm(client, enable); + if (err) + return err; + return 0; } @@ -391,12 +491,66 @@ isl1208_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) return isl1208_i2c_read_alarm(to_i2c_client(dev), alarm); } +static int +isl1208_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + return isl1208_i2c_set_alarm(to_i2c_client(dev), alarm); +} + +static irqreturn_t +isl1208_rtc_interrupt(int irq, void *data) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(1000); + struct i2c_client *client = data; + struct rtc_device *rtc = i2c_get_clientdata(client); + int handled = 0, sr, err; + + /* + * I2C reads get NAK'ed if we read straight away after an interrupt? + * Using a mdelay/msleep didn't seem to help either, so we work around + * this by continually trying to read the register for a short time. + */ + while (1) { + sr = isl1208_i2c_get_sr(client); + if (sr >= 0) + break; + + if (time_after(jiffies, timeout)) { + dev_err(&client->dev, "%s: reading SR failed\n", + __func__); + return sr; + } + } + + if (sr & ISL1208_REG_SR_ALM) { + dev_dbg(&client->dev, "alarm!\n"); + + rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF); + + /* Clear the alarm */ + sr &= ~ISL1208_REG_SR_ALM; + sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr); + if (sr < 0) + dev_err(&client->dev, "%s: writing SR failed\n", + __func__); + else + handled = 1; + + /* Disable the alarm */ + err = isl1208_rtc_toggle_alarm(client, 0); + if (err) + return err; + } + + return handled ? IRQ_HANDLED : IRQ_NONE; +} + static const struct rtc_class_ops isl1208_rtc_ops = { .proc = isl1208_rtc_proc, .read_time = isl1208_rtc_read_time, .set_time = isl1208_rtc_set_time, .read_alarm = isl1208_rtc_read_alarm, - /*.set_alarm = isl1208_rtc_set_alarm, */ + .set_alarm = isl1208_rtc_set_alarm, }; /* sysfs interface */ @@ -488,8 +642,25 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); - rtc = rtc_device_register(isl1208_driver.driver.name, - &client->dev, &isl1208_rtc_ops, + if (client->irq > 0) { + rc = devm_request_threaded_irq(&client->dev, client->irq, NULL, + isl1208_rtc_interrupt, + IRQF_SHARED, + isl1208_driver.driver.name, + client); + if (!rc) { + device_init_wakeup(&client->dev, 1); + enable_irq_wake(client->irq); + } else { + dev_err(&client->dev, + "Unable to request irq %d, no alarm support\n", + client->irq); + client->irq = 0; + } + } + + rtc = devm_rtc_device_register(&client->dev, isl1208_driver.driver.name, + &isl1208_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -499,7 +670,7 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) rc = isl1208_i2c_get_sr(client); if (rc < 0) { dev_err(&client->dev, "reading status failed\n"); - goto exit_unregister; + return rc; } if (rc & ISL1208_REG_SR_RTCF) @@ -508,29 +679,22 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) rc = sysfs_create_group(&client->dev.kobj, &isl1208_rtc_sysfs_files); if (rc) - goto exit_unregister; + return rc; return 0; - -exit_unregister: - rtc_device_unregister(rtc); - - return rc; } static int isl1208_remove(struct i2c_client *client) { - struct rtc_device *rtc = i2c_get_clientdata(client); - sysfs_remove_group(&client->dev.kobj, &isl1208_rtc_sysfs_files); - rtc_device_unregister(rtc); return 0; } static const struct i2c_device_id isl1208_id[] = { { "isl1208", 0 }, + { "isl1218", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, isl1208_id); @@ -544,22 +708,9 @@ static struct i2c_driver isl1208_driver = { .id_table = isl1208_id, }; -static int __init -isl1208_init(void) -{ - return i2c_add_driver(&isl1208_driver); -} - -static void __exit -isl1208_exit(void) -{ - i2c_del_driver(&isl1208_driver); -} +module_i2c_driver(isl1208_driver); MODULE_AUTHOR("Herbert Valerio Riedel <hvr@gnu.org>"); MODULE_DESCRIPTION("Intersil ISL1208 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(isl1208_init); -module_exit(isl1208_exit); diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c index 2e16f72c905..08f5160fb6d 100644 --- a/drivers/rtc/rtc-jz4740.c +++ b/drivers/rtc/rtc-jz4740.c @@ -14,6 +14,7 @@ * */ +#include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -37,12 +38,11 @@ #define JZ_RTC_CTRL_ENABLE BIT(0) struct jz4740_rtc { - struct resource *mem; void __iomem *base; struct rtc_device *rtc; - unsigned int irq; + int irq; spinlock_t lock; }; @@ -168,12 +168,6 @@ static int jz4740_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) return ret; } -static int jz4740_rtc_update_irq_enable(struct device *dev, unsigned int enable) -{ - struct jz4740_rtc *rtc = dev_get_drvdata(dev); - return jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_1HZ_IRQ, enable); -} - static int jz4740_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) { struct jz4740_rtc *rtc = dev_get_drvdata(dev); @@ -185,7 +179,6 @@ static struct rtc_class_ops jz4740_rtc_ops = { .set_mmss = jz4740_rtc_set_mmss, .read_alarm = jz4740_rtc_read_alarm, .set_alarm = jz4740_rtc_set_alarm, - .update_irq_enable = jz4740_rtc_update_irq_enable, .alarm_irq_enable = jz4740_rtc_alarm_irq_enable, }; @@ -217,44 +210,27 @@ void jz4740_rtc_poweroff(struct device *dev) } EXPORT_SYMBOL_GPL(jz4740_rtc_poweroff); -static int __devinit jz4740_rtc_probe(struct platform_device *pdev) +static int jz4740_rtc_probe(struct platform_device *pdev) { int ret; struct jz4740_rtc *rtc; uint32_t scratchpad; + struct resource *mem; - rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); if (!rtc) return -ENOMEM; rtc->irq = platform_get_irq(pdev, 0); if (rtc->irq < 0) { - ret = -ENOENT; dev_err(&pdev->dev, "Failed to get platform irq\n"); - goto err_free; + return -ENOENT; } - rtc->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!rtc->mem) { - ret = -ENOENT; - dev_err(&pdev->dev, "Failed to get platform mmio memory\n"); - goto err_free; - } - - rtc->mem = request_mem_region(rtc->mem->start, resource_size(rtc->mem), - pdev->name); - if (!rtc->mem) { - ret = -EBUSY; - dev_err(&pdev->dev, "Failed to request mmio memory region\n"); - goto err_free; - } - - rtc->base = ioremap_nocache(rtc->mem->start, resource_size(rtc->mem)); - if (!rtc->base) { - ret = -EBUSY; - dev_err(&pdev->dev, "Failed to ioremap mmio memory\n"); - goto err_release_mem_region; - } + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rtc->base = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(rtc->base)) + return PTR_ERR(rtc->base); spin_lock_init(&rtc->lock); @@ -262,19 +238,19 @@ static int __devinit jz4740_rtc_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 1); - rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &jz4740_rtc_ops, - THIS_MODULE); + rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &jz4740_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc)) { ret = PTR_ERR(rtc->rtc); dev_err(&pdev->dev, "Failed to register rtc device: %d\n", ret); - goto err_iounmap; + return ret; } - ret = request_irq(rtc->irq, jz4740_rtc_irq, 0, + ret = devm_request_irq(&pdev->dev, rtc->irq, jz4740_rtc_irq, 0, pdev->name, rtc); if (ret) { dev_err(&pdev->dev, "Failed to request rtc irq: %d\n", ret); - goto err_unregister_rtc; + return ret; } scratchpad = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SCRATCHPAD); @@ -283,46 +259,13 @@ static int __devinit jz4740_rtc_probe(struct platform_device *pdev) ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, 0); if (ret) { dev_err(&pdev->dev, "Could not write write to RTC registers\n"); - goto err_free_irq; + return ret; } } return 0; - -err_free_irq: - free_irq(rtc->irq, rtc); -err_unregister_rtc: - rtc_device_unregister(rtc->rtc); -err_iounmap: - platform_set_drvdata(pdev, NULL); - iounmap(rtc->base); -err_release_mem_region: - release_mem_region(rtc->mem->start, resource_size(rtc->mem)); -err_free: - kfree(rtc); - - return ret; -} - -static int __devexit jz4740_rtc_remove(struct platform_device *pdev) -{ - struct jz4740_rtc *rtc = platform_get_drvdata(pdev); - - free_irq(rtc->irq, rtc); - - rtc_device_unregister(rtc->rtc); - - iounmap(rtc->base); - release_mem_region(rtc->mem->start, resource_size(rtc->mem)); - - kfree(rtc); - - platform_set_drvdata(pdev, NULL); - - return 0; } - #ifdef CONFIG_PM static int jz4740_rtc_suspend(struct device *dev) { @@ -352,9 +295,8 @@ static const struct dev_pm_ops jz4740_pm_ops = { #define JZ4740_RTC_PM_OPS NULL #endif /* CONFIG_PM */ -struct platform_driver jz4740_rtc_driver = { +static struct platform_driver jz4740_rtc_driver = { .probe = jz4740_rtc_probe, - .remove = __devexit_p(jz4740_rtc_remove), .driver = { .name = "jz4740-rtc", .owner = THIS_MODULE, @@ -362,17 +304,7 @@ struct platform_driver jz4740_rtc_driver = { }, }; -static int __init jz4740_rtc_init(void) -{ - return platform_driver_register(&jz4740_rtc_driver); -} -module_init(jz4740_rtc_init); - -static void __exit jz4740_rtc_exit(void) -{ - platform_driver_unregister(&jz4740_rtc_driver); -} -module_exit(jz4740_rtc_exit); +module_platform_driver(jz4740_rtc_driver); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c index 773851f338b..c4cf0573111 100644 --- a/drivers/rtc/rtc-lib.c +++ b/drivers/rtc/rtc-lib.c @@ -85,6 +85,8 @@ void rtc_time_to_tm(unsigned long time, struct rtc_time *tm) time -= tm->tm_hour * 3600; tm->tm_min = time / 60; tm->tm_sec = time - tm->tm_min * 60; + + tm->tm_isdst = 0; } EXPORT_SYMBOL(rtc_time_to_tm); @@ -117,4 +119,32 @@ int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time) } EXPORT_SYMBOL(rtc_tm_to_time); +/* + * Convert rtc_time to ktime + */ +ktime_t rtc_tm_to_ktime(struct rtc_time tm) +{ + time_t time; + rtc_tm_to_time(&tm, &time); + return ktime_set(time, 0); +} +EXPORT_SYMBOL_GPL(rtc_tm_to_ktime); + +/* + * Convert ktime to rtc_time + */ +struct rtc_time rtc_ktime_to_tm(ktime_t kt) +{ + struct timespec ts; + struct rtc_time ret; + + ts = ktime_to_timespec(kt); + /* Round up any ns */ + if (ts.tv_nsec) + ts.tv_sec++; + rtc_time_to_tm(ts.tv_sec, &ret); + return ret; +} +EXPORT_SYMBOL_GPL(rtc_ktime_to_tm); + MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-lp8788.c b/drivers/rtc/rtc-lp8788.c new file mode 100644 index 00000000000..4ff6c73253b --- /dev/null +++ b/drivers/rtc/rtc-lp8788.c @@ -0,0 +1,327 @@ +/* + * TI LP8788 MFD - rtc driver + * + * Copyright 2012 Texas Instruments + * + * Author: Milo(Woogyom) Kim <milo.kim@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/err.h> +#include <linux/irqdomain.h> +#include <linux/mfd/lp8788.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/slab.h> + +/* register address */ +#define LP8788_INTEN_3 0x05 +#define LP8788_RTC_UNLOCK 0x64 +#define LP8788_RTC_SEC 0x70 +#define LP8788_ALM1_SEC 0x77 +#define LP8788_ALM1_EN 0x7D +#define LP8788_ALM2_SEC 0x7E +#define LP8788_ALM2_EN 0x84 + +/* mask/shift bits */ +#define LP8788_INT_RTC_ALM1_M BIT(1) /* Addr 05h */ +#define LP8788_INT_RTC_ALM1_S 1 +#define LP8788_INT_RTC_ALM2_M BIT(2) /* Addr 05h */ +#define LP8788_INT_RTC_ALM2_S 2 +#define LP8788_ALM_EN_M BIT(7) /* Addr 7Dh or 84h */ +#define LP8788_ALM_EN_S 7 + +#define DEFAULT_ALARM_SEL LP8788_ALARM_1 +#define LP8788_MONTH_OFFSET 1 +#define LP8788_BASE_YEAR 2000 +#define MAX_WDAY_BITS 7 +#define LP8788_WDAY_SET 1 +#define RTC_UNLOCK 0x1 +#define RTC_LATCH 0x2 +#define ALARM_IRQ_FLAG (RTC_IRQF | RTC_AF) + +enum lp8788_time { + LPTIME_SEC, + LPTIME_MIN, + LPTIME_HOUR, + LPTIME_MDAY, + LPTIME_MON, + LPTIME_YEAR, + LPTIME_WDAY, + LPTIME_MAX, +}; + +struct lp8788_rtc { + struct lp8788 *lp; + struct rtc_device *rdev; + enum lp8788_alarm_sel alarm; + int irq; +}; + +static const u8 addr_alarm_sec[LP8788_ALARM_MAX] = { + LP8788_ALM1_SEC, + LP8788_ALM2_SEC, +}; + +static const u8 addr_alarm_en[LP8788_ALARM_MAX] = { + LP8788_ALM1_EN, + LP8788_ALM2_EN, +}; + +static const u8 mask_alarm_en[LP8788_ALARM_MAX] = { + LP8788_INT_RTC_ALM1_M, + LP8788_INT_RTC_ALM2_M, +}; + +static const u8 shift_alarm_en[LP8788_ALARM_MAX] = { + LP8788_INT_RTC_ALM1_S, + LP8788_INT_RTC_ALM2_S, +}; + +static int _to_tm_wday(u8 lp8788_wday) +{ + int i; + + if (lp8788_wday == 0) + return 0; + + /* lookup defined weekday from read register value */ + for (i = 0; i < MAX_WDAY_BITS; i++) { + if ((lp8788_wday >> i) == LP8788_WDAY_SET) + break; + } + + return i + 1; +} + +static inline int _to_lp8788_wday(int tm_wday) +{ + return LP8788_WDAY_SET << (tm_wday - 1); +} + +static void lp8788_rtc_unlock(struct lp8788 *lp) +{ + lp8788_write_byte(lp, LP8788_RTC_UNLOCK, RTC_UNLOCK); + lp8788_write_byte(lp, LP8788_RTC_UNLOCK, RTC_LATCH); +} + +static int lp8788_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct lp8788_rtc *rtc = dev_get_drvdata(dev); + struct lp8788 *lp = rtc->lp; + u8 data[LPTIME_MAX]; + int ret; + + lp8788_rtc_unlock(lp); + + ret = lp8788_read_multi_bytes(lp, LP8788_RTC_SEC, data, LPTIME_MAX); + if (ret) + return ret; + + tm->tm_sec = data[LPTIME_SEC]; + tm->tm_min = data[LPTIME_MIN]; + tm->tm_hour = data[LPTIME_HOUR]; + tm->tm_mday = data[LPTIME_MDAY]; + tm->tm_mon = data[LPTIME_MON] - LP8788_MONTH_OFFSET; + tm->tm_year = data[LPTIME_YEAR] + LP8788_BASE_YEAR - 1900; + tm->tm_wday = _to_tm_wday(data[LPTIME_WDAY]); + + return 0; +} + +static int lp8788_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct lp8788_rtc *rtc = dev_get_drvdata(dev); + struct lp8788 *lp = rtc->lp; + u8 data[LPTIME_MAX - 1]; + int ret, i, year; + + year = tm->tm_year + 1900 - LP8788_BASE_YEAR; + if (year < 0) { + dev_err(lp->dev, "invalid year: %d\n", year); + return -EINVAL; + } + + /* because rtc weekday is a readonly register, do not update */ + data[LPTIME_SEC] = tm->tm_sec; + data[LPTIME_MIN] = tm->tm_min; + data[LPTIME_HOUR] = tm->tm_hour; + data[LPTIME_MDAY] = tm->tm_mday; + data[LPTIME_MON] = tm->tm_mon + LP8788_MONTH_OFFSET; + data[LPTIME_YEAR] = year; + + for (i = 0; i < ARRAY_SIZE(data); i++) { + ret = lp8788_write_byte(lp, LP8788_RTC_SEC + i, data[i]); + if (ret) + return ret; + } + + return 0; +} + +static int lp8788_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct lp8788_rtc *rtc = dev_get_drvdata(dev); + struct lp8788 *lp = rtc->lp; + struct rtc_time *tm = &alarm->time; + u8 addr, data[LPTIME_MAX]; + int ret; + + addr = addr_alarm_sec[rtc->alarm]; + ret = lp8788_read_multi_bytes(lp, addr, data, LPTIME_MAX); + if (ret) + return ret; + + tm->tm_sec = data[LPTIME_SEC]; + tm->tm_min = data[LPTIME_MIN]; + tm->tm_hour = data[LPTIME_HOUR]; + tm->tm_mday = data[LPTIME_MDAY]; + tm->tm_mon = data[LPTIME_MON] - LP8788_MONTH_OFFSET; + tm->tm_year = data[LPTIME_YEAR] + LP8788_BASE_YEAR - 1900; + tm->tm_wday = _to_tm_wday(data[LPTIME_WDAY]); + alarm->enabled = data[LPTIME_WDAY] & LP8788_ALM_EN_M; + + return 0; +} + +static int lp8788_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct lp8788_rtc *rtc = dev_get_drvdata(dev); + struct lp8788 *lp = rtc->lp; + struct rtc_time *tm = &alarm->time; + u8 addr, data[LPTIME_MAX]; + int ret, i, year; + + year = tm->tm_year + 1900 - LP8788_BASE_YEAR; + if (year < 0) { + dev_err(lp->dev, "invalid year: %d\n", year); + return -EINVAL; + } + + data[LPTIME_SEC] = tm->tm_sec; + data[LPTIME_MIN] = tm->tm_min; + data[LPTIME_HOUR] = tm->tm_hour; + data[LPTIME_MDAY] = tm->tm_mday; + data[LPTIME_MON] = tm->tm_mon + LP8788_MONTH_OFFSET; + data[LPTIME_YEAR] = year; + data[LPTIME_WDAY] = _to_lp8788_wday(tm->tm_wday); + + for (i = 0; i < ARRAY_SIZE(data); i++) { + addr = addr_alarm_sec[rtc->alarm] + i; + ret = lp8788_write_byte(lp, addr, data[i]); + if (ret) + return ret; + } + + alarm->enabled = 1; + addr = addr_alarm_en[rtc->alarm]; + + return lp8788_update_bits(lp, addr, LP8788_ALM_EN_M, + alarm->enabled << LP8788_ALM_EN_S); +} + +static int lp8788_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + struct lp8788_rtc *rtc = dev_get_drvdata(dev); + struct lp8788 *lp = rtc->lp; + u8 mask, shift; + + if (!rtc->irq) + return -EIO; + + mask = mask_alarm_en[rtc->alarm]; + shift = shift_alarm_en[rtc->alarm]; + + return lp8788_update_bits(lp, LP8788_INTEN_3, mask, enable << shift); +} + +static const struct rtc_class_ops lp8788_rtc_ops = { + .read_time = lp8788_rtc_read_time, + .set_time = lp8788_rtc_set_time, + .read_alarm = lp8788_read_alarm, + .set_alarm = lp8788_set_alarm, + .alarm_irq_enable = lp8788_alarm_irq_enable, +}; + +static irqreturn_t lp8788_alarm_irq_handler(int irq, void *ptr) +{ + struct lp8788_rtc *rtc = ptr; + + rtc_update_irq(rtc->rdev, 1, ALARM_IRQ_FLAG); + return IRQ_HANDLED; +} + +static int lp8788_alarm_irq_register(struct platform_device *pdev, + struct lp8788_rtc *rtc) +{ + struct resource *r; + struct lp8788 *lp = rtc->lp; + struct irq_domain *irqdm = lp->irqdm; + int irq; + + rtc->irq = 0; + + /* even the alarm IRQ number is not specified, rtc time should work */ + r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, LP8788_ALM_IRQ); + if (!r) + return 0; + + if (rtc->alarm == LP8788_ALARM_1) + irq = r->start; + else + irq = r->end; + + rtc->irq = irq_create_mapping(irqdm, irq); + + return devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL, + lp8788_alarm_irq_handler, + 0, LP8788_ALM_IRQ, rtc); +} + +static int lp8788_rtc_probe(struct platform_device *pdev) +{ + struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); + struct lp8788_rtc *rtc; + struct device *dev = &pdev->dev; + + rtc = devm_kzalloc(dev, sizeof(struct lp8788_rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->lp = lp; + rtc->alarm = lp->pdata ? lp->pdata->alarm_sel : DEFAULT_ALARM_SEL; + platform_set_drvdata(pdev, rtc); + + device_init_wakeup(dev, 1); + + rtc->rdev = devm_rtc_device_register(dev, "lp8788_rtc", + &lp8788_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rdev)) { + dev_err(dev, "can not register rtc device\n"); + return PTR_ERR(rtc->rdev); + } + + if (lp8788_alarm_irq_register(pdev, rtc)) + dev_warn(lp->dev, "no rtc irq handler\n"); + + return 0; +} + +static struct platform_driver lp8788_rtc_driver = { + .probe = lp8788_rtc_probe, + .driver = { + .name = LP8788_DEV_RTC, + .owner = THIS_MODULE, + }, +}; +module_platform_driver(lp8788_rtc_driver); + +MODULE_DESCRIPTION("Texas Instruments LP8788 RTC Driver"); +MODULE_AUTHOR("Milo Kim"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lp8788-rtc"); diff --git a/drivers/rtc/rtc-lpc32xx.c b/drivers/rtc/rtc-lpc32xx.c index ec8701ce99f..f130c08c98f 100644 --- a/drivers/rtc/rtc-lpc32xx.c +++ b/drivers/rtc/rtc-lpc32xx.c @@ -19,6 +19,7 @@ #include <linux/rtc.h> #include <linux/slab.h> #include <linux/io.h> +#include <linux/of.h> /* * Clock and Power control register offsets @@ -196,20 +197,13 @@ static const struct rtc_class_ops lpc32xx_rtc_ops = { .alarm_irq_enable = lpc32xx_rtc_alarm_irq_enable, }; -static int __devinit lpc32xx_rtc_probe(struct platform_device *pdev) +static int lpc32xx_rtc_probe(struct platform_device *pdev) { struct resource *res; struct lpc32xx_rtc *rtc; - resource_size_t size; int rtcirq; u32 tmp; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "Can't get memory resource\n"); - return -ENOENT; - } - rtcirq = platform_get_irq(pdev, 0); if (rtcirq < 0 || rtcirq >= NR_IRQS) { dev_warn(&pdev->dev, "Can't get interrupt resource\n"); @@ -217,30 +211,20 @@ static int __devinit lpc32xx_rtc_probe(struct platform_device *pdev) } rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); - if (unlikely(!rtc)) { - dev_err(&pdev->dev, "Can't allocate memory\n"); + if (unlikely(!rtc)) return -ENOMEM; - } - rtc->irq = rtcirq; - size = resource_size(res); - - if (!devm_request_mem_region(&pdev->dev, res->start, size, - pdev->name)) { - dev_err(&pdev->dev, "RTC registers are not free\n"); - return -EBUSY; - } + rtc->irq = rtcirq; - rtc->rtc_base = devm_ioremap(&pdev->dev, res->start, size); - if (!rtc->rtc_base) { - dev_err(&pdev->dev, "Can't map memory\n"); - return -ENOMEM; - } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rtc->rtc_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rtc->rtc_base)) + return PTR_ERR(rtc->rtc_base); spin_lock_init(&rtc->lock); /* - * The RTC is on a seperate power domain and can keep it's state + * The RTC is on a separate power domain and can keep it's state * across a chip power cycle. If the RTC has never been previously * setup, then set it up now for the first time. */ @@ -272,11 +256,10 @@ static int __devinit lpc32xx_rtc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, rtc); - rtc->rtc = rtc_device_register(RTC_NAME, &pdev->dev, &lpc32xx_rtc_ops, - THIS_MODULE); + rtc->rtc = devm_rtc_device_register(&pdev->dev, RTC_NAME, + &lpc32xx_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc)) { dev_err(&pdev->dev, "Can't get RTC\n"); - platform_set_drvdata(pdev, NULL); return PTR_ERR(rtc->rtc); } @@ -287,7 +270,7 @@ static int __devinit lpc32xx_rtc_probe(struct platform_device *pdev) if (rtc->irq >= 0) { if (devm_request_irq(&pdev->dev, rtc->irq, lpc32xx_rtc_alarm_interrupt, - IRQF_DISABLED, pdev->name, rtc) < 0) { + 0, pdev->name, rtc) < 0) { dev_warn(&pdev->dev, "Can't request interrupt.\n"); rtc->irq = -1; } else { @@ -298,16 +281,13 @@ static int __devinit lpc32xx_rtc_probe(struct platform_device *pdev) return 0; } -static int __devexit lpc32xx_rtc_remove(struct platform_device *pdev) +static int lpc32xx_rtc_remove(struct platform_device *pdev) { struct lpc32xx_rtc *rtc = platform_get_drvdata(pdev); if (rtc->irq >= 0) device_init_wakeup(&pdev->dev, 0); - platform_set_drvdata(pdev, NULL); - rtc_device_unregister(rtc->rtc); - return 0; } @@ -386,27 +366,26 @@ static const struct dev_pm_ops lpc32xx_rtc_pm_ops = { #define LPC32XX_RTC_PM_OPS NULL #endif +#ifdef CONFIG_OF +static const struct of_device_id lpc32xx_rtc_match[] = { + { .compatible = "nxp,lpc3220-rtc" }, + { } +}; +MODULE_DEVICE_TABLE(of, lpc32xx_rtc_match); +#endif + static struct platform_driver lpc32xx_rtc_driver = { .probe = lpc32xx_rtc_probe, - .remove = __devexit_p(lpc32xx_rtc_remove), + .remove = lpc32xx_rtc_remove, .driver = { .name = RTC_NAME, .owner = THIS_MODULE, - .pm = LPC32XX_RTC_PM_OPS + .pm = LPC32XX_RTC_PM_OPS, + .of_match_table = of_match_ptr(lpc32xx_rtc_match), }, }; -static int __init lpc32xx_rtc_init(void) -{ - return platform_driver_register(&lpc32xx_rtc_driver); -} -module_init(lpc32xx_rtc_init); - -static void __exit lpc32xx_rtc_exit(void) -{ - platform_driver_unregister(&lpc32xx_rtc_driver); -} -module_exit(lpc32xx_rtc_exit); +module_platform_driver(lpc32xx_rtc_driver); MODULE_AUTHOR("Kevin Wells <wellsk40@gmail.com"); MODULE_DESCRIPTION("RTC driver for the LPC32xx SoC"); diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c new file mode 100644 index 00000000000..682ecb09483 --- /dev/null +++ b/drivers/rtc/rtc-ls1x.c @@ -0,0 +1,199 @@ +/* + * Copyright (c) 2011 Zhao Zhang <zhzhl555@gmail.com> + * + * Derived from driver/rtc/rtc-au1xxx.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/rtc.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/io.h> +#include <asm/mach-loongson1/loongson1.h> + +#define LS1X_RTC_REG_OFFSET (LS1X_RTC_BASE + 0x20) +#define LS1X_RTC_REGS(x) \ + ((void __iomem *)KSEG1ADDR(LS1X_RTC_REG_OFFSET + (x))) + +/*RTC programmable counters 0 and 1*/ +#define SYS_COUNTER_CNTRL (LS1X_RTC_REGS(0x20)) +#define SYS_CNTRL_ERS (1 << 23) +#define SYS_CNTRL_RTS (1 << 20) +#define SYS_CNTRL_RM2 (1 << 19) +#define SYS_CNTRL_RM1 (1 << 18) +#define SYS_CNTRL_RM0 (1 << 17) +#define SYS_CNTRL_RS (1 << 16) +#define SYS_CNTRL_BP (1 << 14) +#define SYS_CNTRL_REN (1 << 13) +#define SYS_CNTRL_BRT (1 << 12) +#define SYS_CNTRL_TEN (1 << 11) +#define SYS_CNTRL_BTT (1 << 10) +#define SYS_CNTRL_E0 (1 << 8) +#define SYS_CNTRL_ETS (1 << 7) +#define SYS_CNTRL_32S (1 << 5) +#define SYS_CNTRL_TTS (1 << 4) +#define SYS_CNTRL_TM2 (1 << 3) +#define SYS_CNTRL_TM1 (1 << 2) +#define SYS_CNTRL_TM0 (1 << 1) +#define SYS_CNTRL_TS (1 << 0) + +/* Programmable Counter 0 Registers */ +#define SYS_TOYTRIM (LS1X_RTC_REGS(0)) +#define SYS_TOYWRITE0 (LS1X_RTC_REGS(4)) +#define SYS_TOYWRITE1 (LS1X_RTC_REGS(8)) +#define SYS_TOYREAD0 (LS1X_RTC_REGS(0xC)) +#define SYS_TOYREAD1 (LS1X_RTC_REGS(0x10)) +#define SYS_TOYMATCH0 (LS1X_RTC_REGS(0x14)) +#define SYS_TOYMATCH1 (LS1X_RTC_REGS(0x18)) +#define SYS_TOYMATCH2 (LS1X_RTC_REGS(0x1C)) + +/* Programmable Counter 1 Registers */ +#define SYS_RTCTRIM (LS1X_RTC_REGS(0x40)) +#define SYS_RTCWRITE0 (LS1X_RTC_REGS(0x44)) +#define SYS_RTCREAD0 (LS1X_RTC_REGS(0x48)) +#define SYS_RTCMATCH0 (LS1X_RTC_REGS(0x4C)) +#define SYS_RTCMATCH1 (LS1X_RTC_REGS(0x50)) +#define SYS_RTCMATCH2 (LS1X_RTC_REGS(0x54)) + +#define LS1X_SEC_OFFSET (4) +#define LS1X_MIN_OFFSET (10) +#define LS1X_HOUR_OFFSET (16) +#define LS1X_DAY_OFFSET (21) +#define LS1X_MONTH_OFFSET (26) + + +#define LS1X_SEC_MASK (0x3f) +#define LS1X_MIN_MASK (0x3f) +#define LS1X_HOUR_MASK (0x1f) +#define LS1X_DAY_MASK (0x1f) +#define LS1X_MONTH_MASK (0x3f) +#define LS1X_YEAR_MASK (0xffffffff) + +#define ls1x_get_sec(t) (((t) >> LS1X_SEC_OFFSET) & LS1X_SEC_MASK) +#define ls1x_get_min(t) (((t) >> LS1X_MIN_OFFSET) & LS1X_MIN_MASK) +#define ls1x_get_hour(t) (((t) >> LS1X_HOUR_OFFSET) & LS1X_HOUR_MASK) +#define ls1x_get_day(t) (((t) >> LS1X_DAY_OFFSET) & LS1X_DAY_MASK) +#define ls1x_get_month(t) (((t) >> LS1X_MONTH_OFFSET) & LS1X_MONTH_MASK) + +#define RTC_CNTR_OK (SYS_CNTRL_E0 | SYS_CNTRL_32S) + +static int ls1x_rtc_read_time(struct device *dev, struct rtc_time *rtm) +{ + unsigned long v, t; + + v = readl(SYS_TOYREAD0); + t = readl(SYS_TOYREAD1); + + memset(rtm, 0, sizeof(struct rtc_time)); + t = mktime((t & LS1X_YEAR_MASK), ls1x_get_month(v), + ls1x_get_day(v), ls1x_get_hour(v), + ls1x_get_min(v), ls1x_get_sec(v)); + rtc_time_to_tm(t, rtm); + + return rtc_valid_tm(rtm); +} + +static int ls1x_rtc_set_time(struct device *dev, struct rtc_time *rtm) +{ + unsigned long v, t, c; + int ret = -ETIMEDOUT; + + v = ((rtm->tm_mon + 1) << LS1X_MONTH_OFFSET) + | (rtm->tm_mday << LS1X_DAY_OFFSET) + | (rtm->tm_hour << LS1X_HOUR_OFFSET) + | (rtm->tm_min << LS1X_MIN_OFFSET) + | (rtm->tm_sec << LS1X_SEC_OFFSET); + + writel(v, SYS_TOYWRITE0); + c = 0x10000; + /* add timeout check counter, for more safe */ + while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c) + usleep_range(1000, 3000); + + if (!c) { + dev_err(dev, "set time timeout!\n"); + goto err; + } + + t = rtm->tm_year + 1900; + writel(t, SYS_TOYWRITE1); + c = 0x10000; + while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c) + usleep_range(1000, 3000); + + if (!c) { + dev_err(dev, "set time timeout!\n"); + goto err; + } + return 0; +err: + return ret; +} + +static struct rtc_class_ops ls1x_rtc_ops = { + .read_time = ls1x_rtc_read_time, + .set_time = ls1x_rtc_set_time, +}; + +static int ls1x_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtcdev; + unsigned long v; + int ret; + + v = readl(SYS_COUNTER_CNTRL); + if (!(v & RTC_CNTR_OK)) { + dev_err(&pdev->dev, "rtc counters not working\n"); + ret = -ENODEV; + goto err; + } + ret = -ETIMEDOUT; + /* set to 1 HZ if needed */ + if (readl(SYS_TOYTRIM) != 32767) { + v = 0x100000; + while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) && --v) + usleep_range(1000, 3000); + + if (!v) { + dev_err(&pdev->dev, "time out\n"); + goto err; + } + writel(32767, SYS_TOYTRIM); + } + /* this loop coundn't be endless */ + while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) + usleep_range(1000, 3000); + + rtcdev = devm_rtc_device_register(&pdev->dev, "ls1x-rtc", + &ls1x_rtc_ops , THIS_MODULE); + if (IS_ERR(rtcdev)) { + ret = PTR_ERR(rtcdev); + goto err; + } + + platform_set_drvdata(pdev, rtcdev); + return 0; +err: + return ret; +} + +static struct platform_driver ls1x_rtc_driver = { + .driver = { + .name = "ls1x-rtc", + .owner = THIS_MODULE, + }, + .probe = ls1x_rtc_probe, +}; + +module_platform_driver(ls1x_rtc_driver); + +MODULE_AUTHOR("zhao zhang <zhzhl555@gmail.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index 5a8daa35806..7ff7427c2e6 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -66,8 +66,6 @@ #define M41T80_FEATURE_WD (1 << 3) /* Extra watchdog resolution */ #define M41T80_FEATURE_SQ_ALT (1 << 4) /* RSx bits are in reg 4 */ -#define DRV_VERSION "0.05" - static DEFINE_MUTEX(m41t80_rtc_mutex); static const struct i2c_device_id m41t80_id[] = { { "m41t62", M41T80_FEATURE_SQ | M41T80_FEATURE_SQ_ALT }, @@ -80,6 +78,7 @@ static const struct i2c_device_id m41t80_id[] = { { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, + { "rv4162", M41T80_FEATURE_SQ | M41T80_FEATURE_WD | M41T80_FEATURE_SQ_ALT }, { } }; MODULE_DEVICE_TABLE(i2c, m41t80_id); @@ -168,7 +167,7 @@ static int m41t80_set_datetime(struct i2c_client *client, struct rtc_time *tm) buf[M41T80_REG_MIN] = bin2bcd(tm->tm_min) | (buf[M41T80_REG_MIN] & ~0x7f); buf[M41T80_REG_HOUR] = - bin2bcd(tm->tm_hour) | (buf[M41T80_REG_HOUR] & ~0x3f) ; + bin2bcd(tm->tm_hour) | (buf[M41T80_REG_HOUR] & ~0x3f); buf[M41T80_REG_WDAY] = (tm->tm_wday & 0x07) | (buf[M41T80_REG_WDAY] & ~0x07); buf[M41T80_REG_DAY] = @@ -213,168 +212,14 @@ static int m41t80_rtc_set_time(struct device *dev, struct rtc_time *tm) return m41t80_set_datetime(to_i2c_client(dev), tm); } -#if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE) -static int -m41t80_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) -{ - struct i2c_client *client = to_i2c_client(dev); - int rc; - - switch (cmd) { - case RTC_AIE_OFF: - case RTC_AIE_ON: - break; - default: - return -ENOIOCTLCMD; - } - - rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON); - if (rc < 0) - goto err; - switch (cmd) { - case RTC_AIE_OFF: - rc &= ~M41T80_ALMON_AFE; - break; - case RTC_AIE_ON: - rc |= M41T80_ALMON_AFE; - break; - } - if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, rc) < 0) - goto err; - return 0; -err: - return -EIO; -} -#else -#define m41t80_rtc_ioctl NULL -#endif - -static int m41t80_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t) -{ - struct i2c_client *client = to_i2c_client(dev); - u8 wbuf[1 + M41T80_ALARM_REG_SIZE]; - u8 *buf = &wbuf[1]; - u8 *reg = buf - M41T80_REG_ALARM_MON; - u8 dt_addr[1] = { M41T80_REG_ALARM_MON }; - struct i2c_msg msgs_in[] = { - { - .addr = client->addr, - .flags = 0, - .len = 1, - .buf = dt_addr, - }, - { - .addr = client->addr, - .flags = I2C_M_RD, - .len = M41T80_ALARM_REG_SIZE, - .buf = buf, - }, - }; - struct i2c_msg msgs[] = { - { - .addr = client->addr, - .flags = 0, - .len = 1 + M41T80_ALARM_REG_SIZE, - .buf = wbuf, - }, - }; - - if (i2c_transfer(client->adapter, msgs_in, 2) < 0) { - dev_err(&client->dev, "read error\n"); - return -EIO; - } - reg[M41T80_REG_ALARM_MON] &= ~(0x1f | M41T80_ALMON_AFE); - reg[M41T80_REG_ALARM_DAY] = 0; - reg[M41T80_REG_ALARM_HOUR] &= ~(0x3f | 0x80); - reg[M41T80_REG_ALARM_MIN] = 0; - reg[M41T80_REG_ALARM_SEC] = 0; - - wbuf[0] = M41T80_REG_ALARM_MON; /* offset into rtc's regs */ - reg[M41T80_REG_ALARM_SEC] |= t->time.tm_sec >= 0 ? - bin2bcd(t->time.tm_sec) : 0x80; - reg[M41T80_REG_ALARM_MIN] |= t->time.tm_min >= 0 ? - bin2bcd(t->time.tm_min) : 0x80; - reg[M41T80_REG_ALARM_HOUR] |= t->time.tm_hour >= 0 ? - bin2bcd(t->time.tm_hour) : 0x80; - reg[M41T80_REG_ALARM_DAY] |= t->time.tm_mday >= 0 ? - bin2bcd(t->time.tm_mday) : 0x80; - if (t->time.tm_mon >= 0) - reg[M41T80_REG_ALARM_MON] |= bin2bcd(t->time.tm_mon + 1); - else - reg[M41T80_REG_ALARM_DAY] |= 0x40; - - if (i2c_transfer(client->adapter, msgs, 1) != 1) { - dev_err(&client->dev, "write error\n"); - return -EIO; - } - - if (t->enabled) { - reg[M41T80_REG_ALARM_MON] |= M41T80_ALMON_AFE; - if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, - reg[M41T80_REG_ALARM_MON]) < 0) { - dev_err(&client->dev, "write error\n"); - return -EIO; - } - } - return 0; -} - -static int m41t80_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *t) -{ - struct i2c_client *client = to_i2c_client(dev); - u8 buf[M41T80_ALARM_REG_SIZE + 1]; /* all alarm regs and flags */ - u8 dt_addr[1] = { M41T80_REG_ALARM_MON }; - u8 *reg = buf - M41T80_REG_ALARM_MON; - struct i2c_msg msgs[] = { - { - .addr = client->addr, - .flags = 0, - .len = 1, - .buf = dt_addr, - }, - { - .addr = client->addr, - .flags = I2C_M_RD, - .len = M41T80_ALARM_REG_SIZE + 1, - .buf = buf, - }, - }; - - if (i2c_transfer(client->adapter, msgs, 2) < 0) { - dev_err(&client->dev, "read error\n"); - return -EIO; - } - t->time.tm_sec = -1; - t->time.tm_min = -1; - t->time.tm_hour = -1; - t->time.tm_mday = -1; - t->time.tm_mon = -1; - if (!(reg[M41T80_REG_ALARM_SEC] & 0x80)) - t->time.tm_sec = bcd2bin(reg[M41T80_REG_ALARM_SEC] & 0x7f); - if (!(reg[M41T80_REG_ALARM_MIN] & 0x80)) - t->time.tm_min = bcd2bin(reg[M41T80_REG_ALARM_MIN] & 0x7f); - if (!(reg[M41T80_REG_ALARM_HOUR] & 0x80)) - t->time.tm_hour = bcd2bin(reg[M41T80_REG_ALARM_HOUR] & 0x3f); - if (!(reg[M41T80_REG_ALARM_DAY] & 0x80)) - t->time.tm_mday = bcd2bin(reg[M41T80_REG_ALARM_DAY] & 0x3f); - if (!(reg[M41T80_REG_ALARM_DAY] & 0x40)) - t->time.tm_mon = bcd2bin(reg[M41T80_REG_ALARM_MON] & 0x1f) - 1; - t->time.tm_year = -1; - t->time.tm_wday = -1; - t->time.tm_yday = -1; - t->time.tm_isdst = -1; - t->enabled = !!(reg[M41T80_REG_ALARM_MON] & M41T80_ALMON_AFE); - t->pending = !!(reg[M41T80_REG_FLAGS] & M41T80_FLAGS_AF); - return 0; -} - +/* + * XXX - m41t80 alarm functionality is reported broken. + * until it is fixed, don't register alarm functions. + */ static struct rtc_class_ops m41t80_rtc_ops = { .read_time = m41t80_rtc_read_time, .set_time = m41t80_rtc_set_time, - .read_alarm = m41t80_rtc_read_alarm, - .set_alarm = m41t80_rtc_set_alarm, .proc = m41t80_rtc_proc, - .ioctl = m41t80_rtc_ioctl, }; #if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE) @@ -386,7 +231,7 @@ static ssize_t m41t80_sysfs_show_flags(struct device *dev, val = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS); if (val < 0) - return -EIO; + return val; return sprintf(buf, "%#x\n", val); } static DEVICE_ATTR(flags, S_IRUGO, m41t80_sysfs_show_flags, NULL); @@ -406,7 +251,7 @@ static ssize_t m41t80_sysfs_show_sqwfreq(struct device *dev, reg_sqw = M41T80_REG_WDAY; val = i2c_smbus_read_byte_data(client, reg_sqw); if (val < 0) - return -EIO; + return val; val = (val >> 4) & 0xf; switch (val) { case 0: @@ -425,7 +270,7 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev, { struct i2c_client *client = to_i2c_client(dev); struct m41t80_data *clientdata = i2c_get_clientdata(client); - int almon, sqw, reg_sqw; + int almon, sqw, reg_sqw, rc; int val = simple_strtoul(buf, NULL, 0); if (!(clientdata->features & M41T80_FEATURE_SQ)) @@ -445,21 +290,30 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev, /* disable SQW, set SQW frequency & re-enable */ almon = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON); if (almon < 0) - return -EIO; + return almon; reg_sqw = M41T80_REG_SQW; if (clientdata->features & M41T80_FEATURE_SQ_ALT) reg_sqw = M41T80_REG_WDAY; sqw = i2c_smbus_read_byte_data(client, reg_sqw); if (sqw < 0) - return -EIO; + return sqw; sqw = (sqw & 0x0f) | (val << 4); - if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, - almon & ~M41T80_ALMON_SQWE) < 0 || - i2c_smbus_write_byte_data(client, reg_sqw, sqw) < 0) - return -EIO; - if (val && i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, - almon | M41T80_ALMON_SQWE) < 0) - return -EIO; + + rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, + almon & ~M41T80_ALMON_SQWE); + if (rc < 0) + return rc; + + if (val) { + rc = i2c_smbus_write_byte_data(client, reg_sqw, sqw); + if (rc < 0) + return rc; + + rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, + almon | M41T80_ALMON_SQWE); + if (rc <0) + return rc; + } return count; } static DEVICE_ATTR(sqwfreq, S_IRUGO | S_IWUSR, @@ -783,38 +637,28 @@ static int m41t80_probe(struct i2c_client *client, struct m41t80_data *clientdata = NULL; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C - | I2C_FUNC_SMBUS_BYTE_DATA)) { - rc = -ENODEV; - goto exit; - } + | I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; - dev_info(&client->dev, - "chip found, driver version " DRV_VERSION "\n"); + clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata), + GFP_KERNEL); + if (!clientdata) + return -ENOMEM; - clientdata = kzalloc(sizeof(*clientdata), GFP_KERNEL); - if (!clientdata) { - rc = -ENOMEM; - goto exit; - } + clientdata->features = id->driver_data; + i2c_set_clientdata(client, clientdata); - rtc = rtc_device_register(client->name, &client->dev, - &m41t80_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - rc = PTR_ERR(rtc); - rtc = NULL; - goto exit; - } + rtc = devm_rtc_device_register(&client->dev, client->name, + &m41t80_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); clientdata->rtc = rtc; - clientdata->features = id->driver_data; - i2c_set_clientdata(client, clientdata); /* Make sure HT (Halt Update) bit is cleared */ rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_HOUR); - if (rc < 0) - goto ht_err; - if (rc & M41T80_ALHOUR_HT) { + if (rc >= 0 && rc & M41T80_ALHOUR_HT) { if (clientdata->features & M41T80_FEATURE_HT) { m41t80_get_datetime(client, &tm); dev_info(&client->dev, "HT bit was set!\n"); @@ -825,72 +669,56 @@ static int m41t80_probe(struct i2c_client *client, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); } - if (i2c_smbus_write_byte_data(client, - M41T80_REG_ALARM_HOUR, - rc & ~M41T80_ALHOUR_HT) < 0) - goto ht_err; + rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_HOUR, + rc & ~M41T80_ALHOUR_HT); + } + + if (rc < 0) { + dev_err(&client->dev, "Can't clear HT bit\n"); + return rc; } /* Make sure ST (stop) bit is cleared */ rc = i2c_smbus_read_byte_data(client, M41T80_REG_SEC); - if (rc < 0) - goto st_err; - if (rc & M41T80_SEC_ST) { - if (i2c_smbus_write_byte_data(client, M41T80_REG_SEC, - rc & ~M41T80_SEC_ST) < 0) - goto st_err; + if (rc >= 0 && rc & M41T80_SEC_ST) + rc = i2c_smbus_write_byte_data(client, M41T80_REG_SEC, + rc & ~M41T80_SEC_ST); + if (rc < 0) { + dev_err(&client->dev, "Can't clear ST bit\n"); + return rc; } rc = m41t80_sysfs_register(&client->dev); if (rc) - goto exit; + return rc; #ifdef CONFIG_RTC_DRV_M41T80_WDT if (clientdata->features & M41T80_FEATURE_HT) { save_client = client; rc = misc_register(&wdt_dev); if (rc) - goto exit; + return rc; rc = register_reboot_notifier(&wdt_notifier); if (rc) { misc_deregister(&wdt_dev); - goto exit; + return rc; } } #endif return 0; - -st_err: - rc = -EIO; - dev_err(&client->dev, "Can't clear ST bit\n"); - goto exit; -ht_err: - rc = -EIO; - dev_err(&client->dev, "Can't clear HT bit\n"); - goto exit; - -exit: - if (rtc) - rtc_device_unregister(rtc); - kfree(clientdata); - return rc; } static int m41t80_remove(struct i2c_client *client) { +#ifdef CONFIG_RTC_DRV_M41T80_WDT struct m41t80_data *clientdata = i2c_get_clientdata(client); - struct rtc_device *rtc = clientdata->rtc; -#ifdef CONFIG_RTC_DRV_M41T80_WDT if (clientdata->features & M41T80_FEATURE_HT) { misc_deregister(&wdt_dev); unregister_reboot_notifier(&wdt_notifier); } #endif - if (rtc) - rtc_device_unregister(rtc); - kfree(clientdata); return 0; } @@ -904,20 +732,8 @@ static struct i2c_driver m41t80_driver = { .id_table = m41t80_id, }; -static int __init m41t80_rtc_init(void) -{ - return i2c_add_driver(&m41t80_driver); -} - -static void __exit m41t80_rtc_exit(void) -{ - i2c_del_driver(&m41t80_driver); -} +module_i2c_driver(m41t80_driver); MODULE_AUTHOR("Alexander Bigga <ab@mycable.de>"); MODULE_DESCRIPTION("ST Microelectronics M41T80 series RTC I2C Client Driver"); MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); - -module_init(m41t80_rtc_init); -module_exit(m41t80_rtc_exit); diff --git a/drivers/rtc/rtc-m41t93.c b/drivers/rtc/rtc-m41t93.c new file mode 100644 index 00000000000..4698c7e344e --- /dev/null +++ b/drivers/rtc/rtc-m41t93.c @@ -0,0 +1,210 @@ +/* + * + * Driver for ST M41T93 SPI RTC + * + * (c) 2010 Nikolaus Voss, Weinmann Medical GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/bcd.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/spi/spi.h> + +#define M41T93_REG_SSEC 0 +#define M41T93_REG_ST_SEC 1 +#define M41T93_REG_MIN 2 +#define M41T93_REG_CENT_HOUR 3 +#define M41T93_REG_WDAY 4 +#define M41T93_REG_DAY 5 +#define M41T93_REG_MON 6 +#define M41T93_REG_YEAR 7 + + +#define M41T93_REG_ALM_HOUR_HT 0xc +#define M41T93_REG_FLAGS 0xf + +#define M41T93_FLAG_ST (1 << 7) +#define M41T93_FLAG_OF (1 << 2) +#define M41T93_FLAG_BL (1 << 4) +#define M41T93_FLAG_HT (1 << 6) + +static inline int m41t93_set_reg(struct spi_device *spi, u8 addr, u8 data) +{ + u8 buf[2]; + + /* MSB must be '1' to write */ + buf[0] = addr | 0x80; + buf[1] = data; + + return spi_write(spi, buf, sizeof(buf)); +} + +static int m41t93_set_time(struct device *dev, struct rtc_time *tm) +{ + struct spi_device *spi = to_spi_device(dev); + int tmp; + u8 buf[9] = {0x80}; /* write cmd + 8 data bytes */ + u8 * const data = &buf[1]; /* ptr to first data byte */ + + dev_dbg(dev, "%s secs=%d, mins=%d, " + "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", + "write", tm->tm_sec, tm->tm_min, + tm->tm_hour, tm->tm_mday, + tm->tm_mon, tm->tm_year, tm->tm_wday); + + if (tm->tm_year < 100) { + dev_warn(&spi->dev, "unsupported date (before 2000-01-01).\n"); + return -EINVAL; + } + + tmp = spi_w8r8(spi, M41T93_REG_FLAGS); + if (tmp < 0) + return tmp; + + if (tmp & M41T93_FLAG_OF) { + dev_warn(&spi->dev, "OF bit is set, resetting.\n"); + m41t93_set_reg(spi, M41T93_REG_FLAGS, tmp & ~M41T93_FLAG_OF); + + tmp = spi_w8r8(spi, M41T93_REG_FLAGS); + if (tmp < 0) { + return tmp; + } else if (tmp & M41T93_FLAG_OF) { + /* OF cannot be immediately reset: oscillator has to be + * restarted. */ + u8 reset_osc = buf[M41T93_REG_ST_SEC] | M41T93_FLAG_ST; + + dev_warn(&spi->dev, + "OF bit is still set, kickstarting clock.\n"); + m41t93_set_reg(spi, M41T93_REG_ST_SEC, reset_osc); + reset_osc &= ~M41T93_FLAG_ST; + m41t93_set_reg(spi, M41T93_REG_ST_SEC, reset_osc); + } + } + + data[M41T93_REG_SSEC] = 0; + data[M41T93_REG_ST_SEC] = bin2bcd(tm->tm_sec); + data[M41T93_REG_MIN] = bin2bcd(tm->tm_min); + data[M41T93_REG_CENT_HOUR] = bin2bcd(tm->tm_hour) | + ((tm->tm_year/100-1) << 6); + data[M41T93_REG_DAY] = bin2bcd(tm->tm_mday); + data[M41T93_REG_WDAY] = bin2bcd(tm->tm_wday + 1); + data[M41T93_REG_MON] = bin2bcd(tm->tm_mon + 1); + data[M41T93_REG_YEAR] = bin2bcd(tm->tm_year % 100); + + return spi_write(spi, buf, sizeof(buf)); +} + + +static int m41t93_get_time(struct device *dev, struct rtc_time *tm) +{ + struct spi_device *spi = to_spi_device(dev); + const u8 start_addr = 0; + u8 buf[8]; + int century_after_1900; + int tmp; + int ret = 0; + + /* Check status of clock. Two states must be considered: + 1. halt bit (HT) is set: the clock is running but update of readout + registers has been disabled due to power failure. This is normal + case after poweron. Time is valid after resetting HT bit. + 2. oscillator fail bit (OF) is set: time is invalid. + */ + tmp = spi_w8r8(spi, M41T93_REG_ALM_HOUR_HT); + if (tmp < 0) + return tmp; + + if (tmp & M41T93_FLAG_HT) { + dev_dbg(&spi->dev, "HT bit is set, reenable clock update.\n"); + m41t93_set_reg(spi, M41T93_REG_ALM_HOUR_HT, + tmp & ~M41T93_FLAG_HT); + } + + tmp = spi_w8r8(spi, M41T93_REG_FLAGS); + if (tmp < 0) + return tmp; + + if (tmp & M41T93_FLAG_OF) { + ret = -EINVAL; + dev_warn(&spi->dev, "OF bit is set, write time to restart.\n"); + } + + if (tmp & M41T93_FLAG_BL) + dev_warn(&spi->dev, "BL bit is set, replace battery.\n"); + + /* read actual time/date */ + tmp = spi_write_then_read(spi, &start_addr, 1, buf, sizeof(buf)); + if (tmp < 0) + return tmp; + + tm->tm_sec = bcd2bin(buf[M41T93_REG_ST_SEC]); + tm->tm_min = bcd2bin(buf[M41T93_REG_MIN]); + tm->tm_hour = bcd2bin(buf[M41T93_REG_CENT_HOUR] & 0x3f); + tm->tm_mday = bcd2bin(buf[M41T93_REG_DAY]); + tm->tm_mon = bcd2bin(buf[M41T93_REG_MON]) - 1; + tm->tm_wday = bcd2bin(buf[M41T93_REG_WDAY] & 0x0f) - 1; + + century_after_1900 = (buf[M41T93_REG_CENT_HOUR] >> 6) + 1; + tm->tm_year = bcd2bin(buf[M41T93_REG_YEAR]) + century_after_1900 * 100; + + dev_dbg(dev, "%s secs=%d, mins=%d, " + "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", + "read", tm->tm_sec, tm->tm_min, + tm->tm_hour, tm->tm_mday, + tm->tm_mon, tm->tm_year, tm->tm_wday); + + return ret < 0 ? ret : rtc_valid_tm(tm); +} + + +static const struct rtc_class_ops m41t93_rtc_ops = { + .read_time = m41t93_get_time, + .set_time = m41t93_set_time, +}; + +static struct spi_driver m41t93_driver; + +static int m41t93_probe(struct spi_device *spi) +{ + struct rtc_device *rtc; + int res; + + spi->bits_per_word = 8; + spi_setup(spi); + + res = spi_w8r8(spi, M41T93_REG_WDAY); + if (res < 0 || (res & 0xf8) != 0) { + dev_err(&spi->dev, "not found 0x%x.\n", res); + return -ENODEV; + } + + rtc = devm_rtc_device_register(&spi->dev, m41t93_driver.driver.name, + &m41t93_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + spi_set_drvdata(spi, rtc); + + return 0; +} + +static struct spi_driver m41t93_driver = { + .driver = { + .name = "rtc-m41t93", + .owner = THIS_MODULE, + }, + .probe = m41t93_probe, +}; + +module_spi_driver(m41t93_driver); + +MODULE_AUTHOR("Nikolaus Voss <n.voss@weinmann.de>"); +MODULE_DESCRIPTION("Driver for ST M41T93 SPI RTC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:rtc-m41t93"); diff --git a/drivers/rtc/rtc-m41t94.c b/drivers/rtc/rtc-m41t94.c index c8c97a4169d..8d800b1bf87 100644 --- a/drivers/rtc/rtc-m41t94.c +++ b/drivers/rtc/rtc-m41t94.c @@ -110,7 +110,7 @@ static const struct rtc_class_ops m41t94_rtc_ops = { static struct spi_driver m41t94_driver; -static int __devinit m41t94_probe(struct spi_device *spi) +static int m41t94_probe(struct spi_device *spi) { struct rtc_device *rtc; int res; @@ -124,22 +124,12 @@ static int __devinit m41t94_probe(struct spi_device *spi) return res; } - rtc = rtc_device_register(m41t94_driver.driver.name, - &spi->dev, &m41t94_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&spi->dev, m41t94_driver.driver.name, + &m41t94_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); - dev_set_drvdata(&spi->dev, rtc); - - return 0; -} - -static int __devexit m41t94_remove(struct spi_device *spi) -{ - struct rtc_device *rtc = platform_get_drvdata(spi); - - if (rtc) - rtc_device_unregister(rtc); + spi_set_drvdata(spi, rtc); return 0; } @@ -147,26 +137,12 @@ static int __devexit m41t94_remove(struct spi_device *spi) static struct spi_driver m41t94_driver = { .driver = { .name = "rtc-m41t94", - .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = m41t94_probe, - .remove = __devexit_p(m41t94_remove), }; -static __init int m41t94_init(void) -{ - return spi_register_driver(&m41t94_driver); -} - -module_init(m41t94_init); - -static __exit void m41t94_exit(void) -{ - spi_unregister_driver(&m41t94_driver); -} - -module_exit(m41t94_exit); +module_spi_driver(m41t94_driver); MODULE_AUTHOR("Kim B. Heino <Kim.Heino@bluegiga.com>"); MODULE_DESCRIPTION("Driver for ST M41T94 SPI RTC"); diff --git a/drivers/rtc/rtc-m48t35.c b/drivers/rtc/rtc-m48t35.c index 7410875e583..411adb3f86a 100644 --- a/drivers/rtc/rtc-m48t35.c +++ b/drivers/rtc/rtc-m48t35.c @@ -20,6 +20,7 @@ #include <linux/platform_device.h> #include <linux/bcd.h> #include <linux/io.h> +#include <linux/err.h> #define DRV_VERSION "1.0" @@ -141,70 +142,40 @@ static const struct rtc_class_ops m48t35_ops = { .set_time = m48t35_set_time, }; -static int __devinit m48t35_probe(struct platform_device *pdev) +static int m48t35_probe(struct platform_device *pdev) { struct resource *res; struct m48t35_priv *priv; - int ret = 0; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; - priv = kzalloc(sizeof(struct m48t35_priv), GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(struct m48t35_priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->size = res->end - res->start + 1; + priv->size = resource_size(res); /* * kludge: remove the #ifndef after ioc3 resource * conflicts are resolved */ #ifndef CONFIG_SGI_IP27 - if (!request_mem_region(res->start, priv->size, pdev->name)) { - ret = -EBUSY; - goto out; - } + if (!devm_request_mem_region(&pdev->dev, res->start, priv->size, + pdev->name)) + return -EBUSY; #endif priv->baseaddr = res->start; - priv->reg = ioremap(priv->baseaddr, priv->size); - if (!priv->reg) { - ret = -ENOMEM; - goto out; - } + priv->reg = devm_ioremap(&pdev->dev, priv->baseaddr, priv->size); + if (!priv->reg) + return -ENOMEM; spin_lock_init(&priv->lock); platform_set_drvdata(pdev, priv); - priv->rtc = rtc_device_register("m48t35", &pdev->dev, + priv->rtc = devm_rtc_device_register(&pdev->dev, "m48t35", &m48t35_ops, THIS_MODULE); - if (IS_ERR(priv->rtc)) { - ret = PTR_ERR(priv->rtc); - goto out; - } - - return 0; - -out: - if (priv->reg) - iounmap(priv->reg); - if (priv->baseaddr) - release_mem_region(priv->baseaddr, priv->size); - kfree(priv); - return ret; -} - -static int __devexit m48t35_remove(struct platform_device *pdev) -{ - struct m48t35_priv *priv = platform_get_drvdata(pdev); - - rtc_device_unregister(priv->rtc); - iounmap(priv->reg); -#ifndef CONFIG_SGI_IP27 - release_mem_region(priv->baseaddr, priv->size); -#endif - kfree(priv); - return 0; + return PTR_ERR_OR_ZERO(priv->rtc); } static struct platform_driver m48t35_platform_driver = { @@ -213,24 +184,12 @@ static struct platform_driver m48t35_platform_driver = { .owner = THIS_MODULE, }, .probe = m48t35_probe, - .remove = __devexit_p(m48t35_remove), }; -static int __init m48t35_init(void) -{ - return platform_driver_register(&m48t35_platform_driver); -} - -static void __exit m48t35_exit(void) -{ - platform_driver_unregister(&m48t35_platform_driver); -} +module_platform_driver(m48t35_platform_driver); MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>"); MODULE_DESCRIPTION("M48T35 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); MODULE_ALIAS("platform:rtc-m48t35"); - -module_init(m48t35_init); -module_exit(m48t35_exit); diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c index a99a0b554eb..11880c1e9da 100644 --- a/drivers/rtc/rtc-m48t59.c +++ b/drivers/rtc/rtc-m48t59.c @@ -68,7 +68,7 @@ m48t59_mem_readb(struct device *dev, u32 ofs) static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); unsigned long flags; u8 val; @@ -111,7 +111,7 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm) static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); unsigned long flags; u8 val = 0; @@ -158,7 +158,7 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm) static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) { struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); struct rtc_time *tm = &alrm->time; unsigned long flags; @@ -205,7 +205,7 @@ static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) static int m48t59_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) { struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); struct rtc_time *tm = &alrm->time; u8 mday, hour, min, sec; @@ -263,36 +263,27 @@ static int m48t59_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) /* * Handle commands from user-space */ -static int m48t59_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int m48t59_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); unsigned long flags; - int ret = 0; spin_lock_irqsave(&m48t59->lock, flags); - switch (cmd) { - case RTC_AIE_OFF: /* alarm interrupt off */ - M48T59_WRITE(0x00, M48T59_INTR); - break; - case RTC_AIE_ON: /* alarm interrupt on */ + if (enabled) M48T59_WRITE(M48T59_INTR_AFE, M48T59_INTR); - break; - default: - ret = -ENOIOCTLCMD; - break; - } + else + M48T59_WRITE(0x00, M48T59_INTR); spin_unlock_irqrestore(&m48t59->lock, flags); - return ret; + return 0; } static int m48t59_rtc_proc(struct device *dev, struct seq_file *seq) { struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); unsigned long flags; u8 val; @@ -313,7 +304,7 @@ static irqreturn_t m48t59_rtc_interrupt(int irq, void *dev_id) { struct device *dev = (struct device *)dev_id; struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); u8 event; @@ -330,12 +321,12 @@ static irqreturn_t m48t59_rtc_interrupt(int irq, void *dev_id) } static const struct rtc_class_ops m48t59_rtc_ops = { - .ioctl = m48t59_rtc_ioctl, .read_time = m48t59_rtc_read_time, .set_time = m48t59_rtc_set_time, .read_alarm = m48t59_rtc_readalarm, .set_alarm = m48t59_rtc_setalarm, .proc = m48t59_rtc_proc, + .alarm_irq_enable = m48t59_rtc_alarm_irq_enable, }; static const struct rtc_class_ops m48t02_rtc_ops = { @@ -349,7 +340,7 @@ static ssize_t m48t59_nvram_read(struct file *filp, struct kobject *kobj, { struct device *dev = container_of(kobj, struct device, kobj); struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); ssize_t cnt = 0; unsigned long flags; @@ -369,7 +360,7 @@ static ssize_t m48t59_nvram_write(struct file *filp, struct kobject *kobj, { struct device *dev = container_of(kobj, struct device, kobj); struct platform_device *pdev = to_platform_device(dev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = platform_get_drvdata(pdev); ssize_t cnt = 0; unsigned long flags; @@ -392,9 +383,9 @@ static struct bin_attribute m48t59_nvram_attr = { .write = m48t59_nvram_write, }; -static int __devinit m48t59_rtc_probe(struct platform_device *pdev) +static int m48t59_rtc_probe(struct platform_device *pdev) { - struct m48t59_plat_data *pdata = pdev->dev.platform_data; + struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev); struct m48t59_private *m48t59 = NULL; struct resource *res; int ret = -ENOMEM; @@ -418,7 +409,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev) } else if (res->flags & IORESOURCE_MEM) { /* we are memory-mapped */ if (!pdata) { - pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), + GFP_KERNEL); if (!pdata) return -ENOMEM; /* Ensure we only kmalloc platform data once */ @@ -434,7 +426,7 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev) pdata->read_byte = m48t59_mem_readb; } - m48t59 = kzalloc(sizeof(*m48t59), GFP_KERNEL); + m48t59 = devm_kzalloc(&pdev->dev, sizeof(*m48t59), GFP_KERNEL); if (!m48t59) return -ENOMEM; @@ -442,9 +434,10 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev) if (!m48t59->ioaddr) { /* ioaddr not mapped externally */ - m48t59->ioaddr = ioremap(res->start, res->end - res->start + 1); + m48t59->ioaddr = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); if (!m48t59->ioaddr) - goto out; + return ret; } /* Try to get irq number. We also can work in @@ -455,10 +448,11 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev) m48t59->irq = NO_IRQ; if (m48t59->irq != NO_IRQ) { - ret = request_irq(m48t59->irq, m48t59_rtc_interrupt, - IRQF_SHARED, "rtc-m48t59", &pdev->dev); + ret = devm_request_irq(&pdev->dev, m48t59->irq, + m48t59_rtc_interrupt, IRQF_SHARED, + "rtc-m48t59", &pdev->dev); if (ret) - goto out; + return ret; } switch (pdata->type) { case M48T59RTC_TYPE_M48T59: @@ -478,52 +472,29 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev) break; default: dev_err(&pdev->dev, "Unknown RTC type\n"); - ret = -ENODEV; - goto out; + return -ENODEV; } spin_lock_init(&m48t59->lock); platform_set_drvdata(pdev, m48t59); - m48t59->rtc = rtc_device_register(name, &pdev->dev, ops, THIS_MODULE); - if (IS_ERR(m48t59->rtc)) { - ret = PTR_ERR(m48t59->rtc); - goto out; - } + m48t59->rtc = devm_rtc_device_register(&pdev->dev, name, ops, + THIS_MODULE); + if (IS_ERR(m48t59->rtc)) + return PTR_ERR(m48t59->rtc); m48t59_nvram_attr.size = pdata->offset; ret = sysfs_create_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr); - if (ret) { - rtc_device_unregister(m48t59->rtc); - goto out; - } + if (ret) + return ret; return 0; - -out: - if (m48t59->irq != NO_IRQ) - free_irq(m48t59->irq, &pdev->dev); - if (m48t59->ioaddr) - iounmap(m48t59->ioaddr); - kfree(m48t59); - return ret; } -static int __devexit m48t59_rtc_remove(struct platform_device *pdev) +static int m48t59_rtc_remove(struct platform_device *pdev) { - struct m48t59_private *m48t59 = platform_get_drvdata(pdev); - struct m48t59_plat_data *pdata = pdev->dev.platform_data; - sysfs_remove_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr); - if (!IS_ERR(m48t59->rtc)) - rtc_device_unregister(m48t59->rtc); - if (m48t59->ioaddr && !pdata->ioaddr) - iounmap(m48t59->ioaddr); - if (m48t59->irq != NO_IRQ) - free_irq(m48t59->irq, &pdev->dev); - platform_set_drvdata(pdev, NULL); - kfree(m48t59); return 0; } @@ -536,21 +507,10 @@ static struct platform_driver m48t59_rtc_driver = { .owner = THIS_MODULE, }, .probe = m48t59_rtc_probe, - .remove = __devexit_p(m48t59_rtc_remove), + .remove = m48t59_rtc_remove, }; -static int __init m48t59_rtc_init(void) -{ - return platform_driver_register(&m48t59_rtc_driver); -} - -static void __exit m48t59_rtc_exit(void) -{ - platform_driver_unregister(&m48t59_rtc_driver); -} - -module_init(m48t59_rtc_init); -module_exit(m48t59_rtc_exit); +module_platform_driver(m48t59_rtc_driver); MODULE_AUTHOR("Mark Zhan <rongkai.zhan@windriver.com>"); MODULE_DESCRIPTION("M48T59/M48T02/M48T08 RTC driver"); diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c index f981287d582..32f64c94262 100644 --- a/drivers/rtc/rtc-m48t86.c +++ b/drivers/rtc/rtc-m48t86.c @@ -46,7 +46,7 @@ static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm) { unsigned char reg; struct platform_device *pdev = to_platform_device(dev); - struct m48t86_ops *ops = pdev->dev.platform_data; + struct m48t86_ops *ops = dev_get_platdata(&pdev->dev); reg = ops->readbyte(M48T86_REG_B); @@ -84,7 +84,7 @@ static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm) { unsigned char reg; struct platform_device *pdev = to_platform_device(dev); - struct m48t86_ops *ops = pdev->dev.platform_data; + struct m48t86_ops *ops = dev_get_platdata(&pdev->dev); reg = ops->readbyte(M48T86_REG_B); @@ -123,7 +123,7 @@ static int m48t86_rtc_proc(struct device *dev, struct seq_file *seq) { unsigned char reg; struct platform_device *pdev = to_platform_device(dev); - struct m48t86_ops *ops = pdev->dev.platform_data; + struct m48t86_ops *ops = dev_get_platdata(&pdev->dev); reg = ops->readbyte(M48T86_REG_B); @@ -144,12 +144,14 @@ static const struct rtc_class_ops m48t86_rtc_ops = { .proc = m48t86_rtc_proc, }; -static int __devinit m48t86_rtc_probe(struct platform_device *dev) +static int m48t86_rtc_probe(struct platform_device *dev) { unsigned char reg; - struct m48t86_ops *ops = dev->dev.platform_data; - struct rtc_device *rtc = rtc_device_register("m48t86", - &dev->dev, &m48t86_rtc_ops, THIS_MODULE); + struct m48t86_ops *ops = dev_get_platdata(&dev->dev); + struct rtc_device *rtc; + + rtc = devm_rtc_device_register(&dev->dev, "m48t86", + &m48t86_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -164,42 +166,18 @@ static int __devinit m48t86_rtc_probe(struct platform_device *dev) return 0; } -static int __devexit m48t86_rtc_remove(struct platform_device *dev) -{ - struct rtc_device *rtc = platform_get_drvdata(dev); - - if (rtc) - rtc_device_unregister(rtc); - - platform_set_drvdata(dev, NULL); - - return 0; -} - static struct platform_driver m48t86_rtc_platform_driver = { .driver = { .name = "rtc-m48t86", .owner = THIS_MODULE, }, .probe = m48t86_rtc_probe, - .remove = __devexit_p(m48t86_rtc_remove), }; -static int __init m48t86_rtc_init(void) -{ - return platform_driver_register(&m48t86_rtc_platform_driver); -} - -static void __exit m48t86_rtc_exit(void) -{ - platform_driver_unregister(&m48t86_rtc_platform_driver); -} +module_platform_driver(m48t86_rtc_platform_driver); MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); MODULE_DESCRIPTION("M48T86 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); MODULE_ALIAS("platform:rtc-m48t86"); - -module_init(m48t86_rtc_init); -module_exit(m48t86_rtc_exit); diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c index 486142c2637..4804985b876 100644 --- a/drivers/rtc/rtc-max6900.c +++ b/drivers/rtc/rtc-max6900.c @@ -164,14 +164,7 @@ static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm) static int max6900_i2c_clear_write_protect(struct i2c_client *client) { - int rc; - rc = i2c_smbus_write_byte_data(client, MAX6900_REG_CONTROL_WRITE, 0); - if (rc < 0) { - dev_err(&client->dev, "%s: control register write failed\n", - __func__); - return -EIO; - } - return 0; + return i2c_smbus_write_byte_data(client, MAX6900_REG_CONTROL_WRITE, 0); } static int @@ -212,16 +205,6 @@ static int max6900_rtc_set_time(struct device *dev, struct rtc_time *tm) return max6900_i2c_set_time(to_i2c_client(dev), tm); } -static int max6900_remove(struct i2c_client *client) -{ - struct rtc_device *rtc = i2c_get_clientdata(client); - - if (rtc) - rtc_device_unregister(rtc); - - return 0; -} - static const struct rtc_class_ops max6900_rtc_ops = { .read_time = max6900_rtc_read_time, .set_time = max6900_rtc_set_time, @@ -237,8 +220,8 @@ max6900_probe(struct i2c_client *client, const struct i2c_device_id *id) dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); - rtc = rtc_device_register(max6900_driver.driver.name, - &client->dev, &max6900_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&client->dev, max6900_driver.driver.name, + &max6900_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -257,24 +240,12 @@ static struct i2c_driver max6900_driver = { .name = "rtc-max6900", }, .probe = max6900_probe, - .remove = max6900_remove, .id_table = max6900_id, }; -static int __init max6900_init(void) -{ - return i2c_add_driver(&max6900_driver); -} - -static void __exit max6900_exit(void) -{ - i2c_del_driver(&max6900_driver); -} +module_i2c_driver(max6900_driver); MODULE_DESCRIPTION("Maxim MAX6900 RTC driver"); MODULE_AUTHOR("Dale Farnsworth <dale@farnsworth.org>"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(max6900_init); -module_exit(max6900_exit); diff --git a/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c index 657403ebd54..ac3f4191864 100644 --- a/drivers/rtc/rtc-max6902.c +++ b/drivers/rtc/rtc-max6902.c @@ -93,24 +93,24 @@ static int max6902_set_time(struct device *dev, struct rtc_time *dt) dt->tm_year = dt->tm_year + 1900; /* Remove write protection */ - max6902_set_reg(dev, 0xF, 0); + max6902_set_reg(dev, MAX6902_REG_CONTROL, 0); - max6902_set_reg(dev, 0x01, bin2bcd(dt->tm_sec)); - max6902_set_reg(dev, 0x03, bin2bcd(dt->tm_min)); - max6902_set_reg(dev, 0x05, bin2bcd(dt->tm_hour)); + max6902_set_reg(dev, MAX6902_REG_SECONDS, bin2bcd(dt->tm_sec)); + max6902_set_reg(dev, MAX6902_REG_MINUTES, bin2bcd(dt->tm_min)); + max6902_set_reg(dev, MAX6902_REG_HOURS, bin2bcd(dt->tm_hour)); - max6902_set_reg(dev, 0x07, bin2bcd(dt->tm_mday)); - max6902_set_reg(dev, 0x09, bin2bcd(dt->tm_mon + 1)); - max6902_set_reg(dev, 0x0B, bin2bcd(dt->tm_wday)); - max6902_set_reg(dev, 0x0D, bin2bcd(dt->tm_year % 100)); - max6902_set_reg(dev, 0x13, bin2bcd(dt->tm_year / 100)); + max6902_set_reg(dev, MAX6902_REG_DATE, bin2bcd(dt->tm_mday)); + max6902_set_reg(dev, MAX6902_REG_MONTH, bin2bcd(dt->tm_mon + 1)); + max6902_set_reg(dev, MAX6902_REG_DAY, bin2bcd(dt->tm_wday)); + max6902_set_reg(dev, MAX6902_REG_YEAR, bin2bcd(dt->tm_year % 100)); + max6902_set_reg(dev, MAX6902_REG_CENTURY, bin2bcd(dt->tm_year / 100)); /* Compulab used a delay here. However, the datasheet * does not mention a delay being required anywhere... */ /* delay(2000); */ /* Write protect */ - max6902_set_reg(dev, 0xF, 0x80); + max6902_set_reg(dev, MAX6902_REG_CONTROL, 0x80); return 0; } @@ -120,7 +120,7 @@ static const struct rtc_class_ops max6902_rtc_ops = { .set_time = max6902_set_time, }; -static int __devinit max6902_probe(struct spi_device *spi) +static int max6902_probe(struct spi_device *spi) { struct rtc_device *rtc; unsigned char tmp; @@ -134,45 +134,26 @@ static int __devinit max6902_probe(struct spi_device *spi) if (res != 0) return res; - rtc = rtc_device_register("max6902", - &spi->dev, &max6902_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&spi->dev, "max6902", + &max6902_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); - return 0; -} - -static int __devexit max6902_remove(struct spi_device *spi) -{ - struct rtc_device *rtc = platform_get_drvdata(spi); - - rtc_device_unregister(rtc); + spi_set_drvdata(spi, rtc); return 0; } static struct spi_driver max6902_driver = { .driver = { .name = "rtc-max6902", - .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = max6902_probe, - .remove = __devexit_p(max6902_remove), }; -static __init int max6902_init(void) -{ - return spi_register_driver(&max6902_driver); -} -module_init(max6902_init); - -static __exit void max6902_exit(void) -{ - spi_unregister_driver(&max6902_driver); -} -module_exit(max6902_exit); +module_spi_driver(max6902_driver); -MODULE_DESCRIPTION ("max6902 spi RTC driver"); -MODULE_AUTHOR ("Raphael Assenat"); -MODULE_LICENSE ("GPL"); +MODULE_DESCRIPTION("max6902 spi RTC driver"); +MODULE_AUTHOR("Raphael Assenat"); +MODULE_LICENSE("GPL"); MODULE_ALIAS("spi:rtc-max6902"); diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c new file mode 100644 index 00000000000..9efe118a28b --- /dev/null +++ b/drivers/rtc/rtc-max77686.c @@ -0,0 +1,616 @@ +/* + * RTC driver for Maxim MAX77686 + * + * Copyright (C) 2012 Samsung Electronics Co.Ltd + * + * based on rtc-max8997.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/slab.h> +#include <linux/rtc.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/mfd/max77686-private.h> +#include <linux/irqdomain.h> +#include <linux/regmap.h> + +/* RTC Control Register */ +#define BCD_EN_SHIFT 0 +#define BCD_EN_MASK (1 << BCD_EN_SHIFT) +#define MODEL24_SHIFT 1 +#define MODEL24_MASK (1 << MODEL24_SHIFT) +/* RTC Update Register1 */ +#define RTC_UDR_SHIFT 0 +#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT) +#define RTC_RBUDR_SHIFT 4 +#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT) +/* WTSR and SMPL Register */ +#define WTSRT_SHIFT 0 +#define SMPLT_SHIFT 2 +#define WTSR_EN_SHIFT 6 +#define SMPL_EN_SHIFT 7 +#define WTSRT_MASK (3 << WTSRT_SHIFT) +#define SMPLT_MASK (3 << SMPLT_SHIFT) +#define WTSR_EN_MASK (1 << WTSR_EN_SHIFT) +#define SMPL_EN_MASK (1 << SMPL_EN_SHIFT) +/* RTC Hour register */ +#define HOUR_PM_SHIFT 6 +#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT) +/* RTC Alarm Enable */ +#define ALARM_ENABLE_SHIFT 7 +#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT) + +#define MAX77686_RTC_UPDATE_DELAY 16 +#undef MAX77686_RTC_WTSR_SMPL + +enum { + RTC_SEC = 0, + RTC_MIN, + RTC_HOUR, + RTC_WEEKDAY, + RTC_MONTH, + RTC_YEAR, + RTC_DATE, + RTC_NR_TIME +}; + +struct max77686_rtc_info { + struct device *dev; + struct max77686_dev *max77686; + struct i2c_client *rtc; + struct rtc_device *rtc_dev; + struct mutex lock; + + struct regmap *regmap; + + int virq; + int rtc_24hr_mode; +}; + +enum MAX77686_RTC_OP { + MAX77686_RTC_WRITE, + MAX77686_RTC_READ, +}; + +static inline int max77686_rtc_calculate_wday(u8 shifted) +{ + int counter = -1; + while (shifted) { + shifted >>= 1; + counter++; + } + return counter; +} + +static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm, + int rtc_24hr_mode) +{ + tm->tm_sec = data[RTC_SEC] & 0x7f; + tm->tm_min = data[RTC_MIN] & 0x7f; + if (rtc_24hr_mode) + tm->tm_hour = data[RTC_HOUR] & 0x1f; + else { + tm->tm_hour = data[RTC_HOUR] & 0x0f; + if (data[RTC_HOUR] & HOUR_PM_MASK) + tm->tm_hour += 12; + } + + tm->tm_wday = max77686_rtc_calculate_wday(data[RTC_WEEKDAY] & 0x7f); + tm->tm_mday = data[RTC_DATE] & 0x1f; + tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; + tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100; + tm->tm_yday = 0; + tm->tm_isdst = 0; +} + +static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data) +{ + data[RTC_SEC] = tm->tm_sec; + data[RTC_MIN] = tm->tm_min; + data[RTC_HOUR] = tm->tm_hour; + data[RTC_WEEKDAY] = 1 << tm->tm_wday; + data[RTC_DATE] = tm->tm_mday; + data[RTC_MONTH] = tm->tm_mon + 1; + data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; + + if (tm->tm_year < 100) { + pr_warn("%s: MAX77686 RTC cannot handle the year %d." + "Assume it's 2000.\n", __func__, 1900 + tm->tm_year); + return -EINVAL; + } + return 0; +} + +static int max77686_rtc_update(struct max77686_rtc_info *info, + enum MAX77686_RTC_OP op) +{ + int ret; + unsigned int data; + + if (op == MAX77686_RTC_WRITE) + data = 1 << RTC_UDR_SHIFT; + else + data = 1 << RTC_RBUDR_SHIFT; + + ret = regmap_update_bits(info->max77686->rtc_regmap, + MAX77686_RTC_UPDATE0, data, data); + if (ret < 0) + dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n", + __func__, ret, data); + else { + /* Minimum 16ms delay required before RTC update. */ + msleep(MAX77686_RTC_UPDATE_DELAY); + } + + return ret; +} + +static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + mutex_lock(&info->lock); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_RTC_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, tm, info->rtc_24hr_mode); + + ret = rtc_valid_tm(tm); + +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + ret = max77686_rtc_tm_to_data(tm, data); + if (ret < 0) + return ret; + + mutex_lock(&info->lock); + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_RTC_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, + ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); + +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + unsigned int val; + int i, ret; + + mutex_lock(&info->lock); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", + __func__, __LINE__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); + + alrm->enabled = 0; + for (i = 0; i < RTC_NR_TIME; i++) { + if (data[i] & ALARM_ENABLE_MASK) { + alrm->enabled = 1; + break; + } + } + + alrm->pending = 0; + ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS2, &val); + if (ret < 0) { + dev_err(info->dev, "%s:%d fail to read status2 reg(%d)\n", + __func__, __LINE__, ret); + goto out; + } + + if (val & (1 << 4)) /* RTCA1 */ + alrm->pending = 1; + +out: + mutex_unlock(&info->lock); + return 0; +} + +static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) +{ + u8 data[RTC_NR_TIME]; + int ret, i; + struct rtc_time tm; + + if (!mutex_is_locked(&info->lock)) + dev_warn(info->dev, "%s: should have mutex locked\n", __func__); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", + __func__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); + + for (i = 0; i < RTC_NR_TIME; i++) + data[i] &= ~ALARM_ENABLE_MASK; + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); +out: + return ret; +} + +static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) +{ + u8 data[RTC_NR_TIME]; + int ret; + struct rtc_time tm; + + if (!mutex_is_locked(&info->lock)) + dev_warn(info->dev, "%s: should have mutex locked\n", __func__); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", + __func__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); + + data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; + if (data[RTC_MONTH] & 0xf) + data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); + if (data[RTC_YEAR] & 0x7f) + data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); + if (data[RTC_DATE] & 0x1f) + data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); +out: + return ret; +} + +static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + ret = max77686_rtc_tm_to_data(&alrm->time, data); + if (ret < 0) + return ret; + + mutex_lock(&info->lock); + + ret = max77686_rtc_stop_alarm(info); + if (ret < 0) + goto out; + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); + if (ret < 0) + goto out; + + if (alrm->enabled) + ret = max77686_rtc_start_alarm(info); +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max77686_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + int ret; + + mutex_lock(&info->lock); + if (enabled) + ret = max77686_rtc_start_alarm(info); + else + ret = max77686_rtc_stop_alarm(info); + mutex_unlock(&info->lock); + + return ret; +} + +static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) +{ + struct max77686_rtc_info *info = data; + + dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); + + rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops max77686_rtc_ops = { + .read_time = max77686_rtc_read_time, + .set_time = max77686_rtc_set_time, + .read_alarm = max77686_rtc_read_alarm, + .set_alarm = max77686_rtc_set_alarm, + .alarm_irq_enable = max77686_rtc_alarm_irq_enable, +}; + +#ifdef MAX77686_RTC_WTSR_SMPL +static void max77686_rtc_enable_wtsr(struct max77686_rtc_info *info, bool enable) +{ + int ret; + unsigned int val, mask; + + if (enable) + val = (1 << WTSR_EN_SHIFT) | (3 << WTSRT_SHIFT); + else + val = 0; + + mask = WTSR_EN_MASK | WTSRT_MASK; + + dev_info(info->dev, "%s: %s WTSR\n", __func__, + enable ? "enable" : "disable"); + + ret = regmap_update_bits(info->max77686->rtc_regmap, + MAX77686_WTSR_SMPL_CNTL, mask, val); + if (ret < 0) { + dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", + __func__, ret); + return; + } + + max77686_rtc_update(info, MAX77686_RTC_WRITE); +} + +static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable) +{ + int ret; + unsigned int val, mask; + + if (enable) + val = (1 << SMPL_EN_SHIFT) | (0 << SMPLT_SHIFT); + else + val = 0; + + mask = SMPL_EN_MASK | SMPLT_MASK; + + dev_info(info->dev, "%s: %s SMPL\n", __func__, + enable ? "enable" : "disable"); + + ret = regmap_update_bits(info->max77686->rtc_regmap, + MAX77686_WTSR_SMPL_CNTL, mask, val); + if (ret < 0) { + dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", + __func__, ret); + return; + } + + max77686_rtc_update(info, MAX77686_RTC_WRITE); + + val = 0; + regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val); + dev_info(info->dev, "%s: WTSR_SMPL(0x%02x)\n", __func__, val); +} +#endif /* MAX77686_RTC_WTSR_SMPL */ + +static int max77686_rtc_init_reg(struct max77686_rtc_info *info) +{ + u8 data[2]; + int ret; + + /* Set RTC control register : Binary mode, 24hour mdoe */ + data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + + info->rtc_24hr_mode = 1; + + ret = regmap_bulk_write(info->max77686->rtc_regmap, MAX77686_RTC_CONTROLM, data, 2); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", + __func__, ret); + return ret; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); + return ret; +} + +static struct regmap_config max77686_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int max77686_rtc_probe(struct platform_device *pdev) +{ + struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent); + struct max77686_rtc_info *info; + int ret, virq; + + dev_info(&pdev->dev, "%s\n", __func__); + + info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + mutex_init(&info->lock); + info->dev = &pdev->dev; + info->max77686 = max77686; + info->rtc = max77686->rtc; + info->max77686->rtc_regmap = devm_regmap_init_i2c(info->max77686->rtc, + &max77686_rtc_regmap_config); + if (IS_ERR(info->max77686->rtc_regmap)) { + ret = PTR_ERR(info->max77686->rtc_regmap); + dev_err(info->max77686->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + platform_set_drvdata(pdev, info); + + ret = max77686_rtc_init_reg(info); + + if (ret < 0) { + dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); + goto err_rtc; + } + +#ifdef MAX77686_RTC_WTSR_SMPL + max77686_rtc_enable_wtsr(info, true); + max77686_rtc_enable_smpl(info, true); +#endif + + device_init_wakeup(&pdev->dev, 1); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc", + &max77686_rtc_ops, THIS_MODULE); + + if (IS_ERR(info->rtc_dev)) { + dev_info(&pdev->dev, "%s: fail\n", __func__); + + ret = PTR_ERR(info->rtc_dev); + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); + if (ret == 0) + ret = -EINVAL; + goto err_rtc; + } + virq = irq_create_mapping(max77686->irq_domain, MAX77686_RTCIRQ_RTCA1); + if (!virq) { + ret = -ENXIO; + goto err_rtc; + } + info->virq = virq; + + ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, + max77686_rtc_alarm_irq, 0, "rtc-alarm0", info); + if (ret < 0) + dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", + info->virq, ret); + +err_rtc: + return ret; +} + +static void max77686_rtc_shutdown(struct platform_device *pdev) +{ +#ifdef MAX77686_RTC_WTSR_SMPL + struct max77686_rtc_info *info = platform_get_drvdata(pdev); + int i; + u8 val = 0; + + for (i = 0; i < 3; i++) { + max77686_rtc_enable_wtsr(info, false); + regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val); + dev_info(info->dev, "%s: WTSR_SMPL reg(0x%02x)\n", __func__, + val); + if (val & WTSR_EN_MASK) { + dev_emerg(info->dev, "%s: fail to disable WTSR\n", + __func__); + } else { + dev_info(info->dev, "%s: success to disable WTSR\n", + __func__); + break; + } + } + + /* Disable SMPL when power off */ + max77686_rtc_enable_smpl(info, false); +#endif /* MAX77686_RTC_WTSR_SMPL */ +} + +static const struct platform_device_id rtc_id[] = { + { "max77686-rtc", 0 }, + {}, +}; + +static struct platform_driver max77686_rtc_driver = { + .driver = { + .name = "max77686-rtc", + .owner = THIS_MODULE, + }, + .probe = max77686_rtc_probe, + .shutdown = max77686_rtc_shutdown, + .id_table = rtc_id, +}; + +module_platform_driver(max77686_rtc_driver); + +MODULE_DESCRIPTION("Maxim MAX77686 RTC driver"); +MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-max8907.c b/drivers/rtc/rtc-max8907.c new file mode 100644 index 00000000000..3032178bd9e --- /dev/null +++ b/drivers/rtc/rtc-max8907.c @@ -0,0 +1,225 @@ +/* + * RTC driver for Maxim MAX8907 + * + * Copyright (c) 2011-2012, NVIDIA Corporation. + * + * Based on drivers/rtc/rtc-max8925.c, + * Copyright (C) 2009-2010 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/bcd.h> +#include <linux/i2c.h> +#include <linux/mfd/max8907.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/rtc.h> +#include <linux/slab.h> + +enum { + RTC_SEC = 0, + RTC_MIN, + RTC_HOUR, + RTC_WEEKDAY, + RTC_DATE, + RTC_MONTH, + RTC_YEAR1, + RTC_YEAR2, +}; + +#define TIME_NUM 8 +#define ALARM_1SEC (1 << 7) +#define HOUR_12 (1 << 7) +#define HOUR_AM_PM (1 << 5) +#define ALARM0_IRQ (1 << 3) +#define ALARM1_IRQ (1 << 2) +#define ALARM0_STATUS (1 << 2) +#define ALARM1_STATUS (1 << 1) + +struct max8907_rtc { + struct max8907 *max8907; + struct regmap *regmap; + struct rtc_device *rtc_dev; + int irq; +}; + +static irqreturn_t max8907_irq_handler(int irq, void *data) +{ + struct max8907_rtc *rtc = data; + + regmap_write(rtc->regmap, MAX8907_REG_ALARM0_CNTL, 0); + + rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static void regs_to_tm(u8 *regs, struct rtc_time *tm) +{ + tm->tm_year = bcd2bin(regs[RTC_YEAR2]) * 100 + + bcd2bin(regs[RTC_YEAR1]) - 1900; + tm->tm_mon = bcd2bin(regs[RTC_MONTH] & 0x1f) - 1; + tm->tm_mday = bcd2bin(regs[RTC_DATE] & 0x3f); + tm->tm_wday = (regs[RTC_WEEKDAY] & 0x07); + if (regs[RTC_HOUR] & HOUR_12) { + tm->tm_hour = bcd2bin(regs[RTC_HOUR] & 0x01f); + if (tm->tm_hour == 12) + tm->tm_hour = 0; + if (regs[RTC_HOUR] & HOUR_AM_PM) + tm->tm_hour += 12; + } else { + tm->tm_hour = bcd2bin(regs[RTC_HOUR] & 0x03f); + } + tm->tm_min = bcd2bin(regs[RTC_MIN] & 0x7f); + tm->tm_sec = bcd2bin(regs[RTC_SEC] & 0x7f); +} + +static void tm_to_regs(struct rtc_time *tm, u8 *regs) +{ + u8 high, low; + + high = (tm->tm_year + 1900) / 100; + low = tm->tm_year % 100; + regs[RTC_YEAR2] = bin2bcd(high); + regs[RTC_YEAR1] = bin2bcd(low); + regs[RTC_MONTH] = bin2bcd(tm->tm_mon + 1); + regs[RTC_DATE] = bin2bcd(tm->tm_mday); + regs[RTC_WEEKDAY] = tm->tm_wday; + regs[RTC_HOUR] = bin2bcd(tm->tm_hour); + regs[RTC_MIN] = bin2bcd(tm->tm_min); + regs[RTC_SEC] = bin2bcd(tm->tm_sec); +} + +static int max8907_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct max8907_rtc *rtc = dev_get_drvdata(dev); + u8 regs[TIME_NUM]; + int ret; + + ret = regmap_bulk_read(rtc->regmap, MAX8907_REG_RTC_SEC, regs, + TIME_NUM); + if (ret < 0) + return ret; + + regs_to_tm(regs, tm); + + return 0; +} + +static int max8907_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct max8907_rtc *rtc = dev_get_drvdata(dev); + u8 regs[TIME_NUM]; + + tm_to_regs(tm, regs); + + return regmap_bulk_write(rtc->regmap, MAX8907_REG_RTC_SEC, regs, + TIME_NUM); +} + +static int max8907_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max8907_rtc *rtc = dev_get_drvdata(dev); + u8 regs[TIME_NUM]; + unsigned int val; + int ret; + + ret = regmap_bulk_read(rtc->regmap, MAX8907_REG_ALARM0_SEC, regs, + TIME_NUM); + if (ret < 0) + return ret; + + regs_to_tm(regs, &alrm->time); + + ret = regmap_read(rtc->regmap, MAX8907_REG_ALARM0_CNTL, &val); + if (ret < 0) + return ret; + + alrm->enabled = !!(val & 0x7f); + + return 0; +} + +static int max8907_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max8907_rtc *rtc = dev_get_drvdata(dev); + u8 regs[TIME_NUM]; + int ret; + + tm_to_regs(&alrm->time, regs); + + /* Disable alarm while we update the target time */ + ret = regmap_write(rtc->regmap, MAX8907_REG_ALARM0_CNTL, 0); + if (ret < 0) + return ret; + + ret = regmap_bulk_write(rtc->regmap, MAX8907_REG_ALARM0_SEC, regs, + TIME_NUM); + if (ret < 0) + return ret; + + if (alrm->enabled) + ret = regmap_write(rtc->regmap, MAX8907_REG_ALARM0_CNTL, 0x77); + + return ret; +} + +static const struct rtc_class_ops max8907_rtc_ops = { + .read_time = max8907_rtc_read_time, + .set_time = max8907_rtc_set_time, + .read_alarm = max8907_rtc_read_alarm, + .set_alarm = max8907_rtc_set_alarm, +}; + +static int max8907_rtc_probe(struct platform_device *pdev) +{ + struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent); + struct max8907_rtc *rtc; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + platform_set_drvdata(pdev, rtc); + + rtc->max8907 = max8907; + rtc->regmap = max8907->regmap_rtc; + + rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8907-rtc", + &max8907_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc_dev)) { + ret = PTR_ERR(rtc->rtc_dev); + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); + return ret; + } + + rtc->irq = regmap_irq_get_virq(max8907->irqc_rtc, + MAX8907_IRQ_RTC_ALARM0); + if (rtc->irq < 0) + return rtc->irq; + + ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL, + max8907_irq_handler, + IRQF_ONESHOT, "max8907-alarm0", rtc); + if (ret < 0) + dev_err(&pdev->dev, "Failed to request IRQ%d: %d\n", + rtc->irq, ret); + + return ret; +} + +static struct platform_driver max8907_rtc_driver = { + .driver = { + .name = "max8907-rtc", + .owner = THIS_MODULE, + }, + .probe = max8907_rtc_probe, +}; +module_platform_driver(max8907_rtc_driver); + +MODULE_DESCRIPTION("Maxim MAX8907 RTC driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c index 174036dda78..951d1a78e19 100644 --- a/drivers/rtc/rtc-max8925.c +++ b/drivers/rtc/rtc-max8925.c @@ -69,6 +69,7 @@ struct max8925_rtc_info { struct max8925_chip *chip; struct i2c_client *rtc; struct device *dev; + int irq; }; static irqreturn_t rtc_update_handler(int irq, void *data) @@ -193,10 +194,17 @@ static int max8925_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) ret = max8925_reg_read(info->rtc, MAX8925_RTC_IRQ_MASK); if (ret < 0) goto out; - if ((ret & ALARM0_IRQ) == 0) - alrm->enabled = 1; - else + if (ret & ALARM0_IRQ) { alrm->enabled = 0; + } else { + ret = max8925_reg_read(info->rtc, MAX8925_ALARM0_CNTL); + if (ret < 0) + goto out; + if (!ret) + alrm->enabled = 0; + else + alrm->enabled = 1; + } ret = max8925_reg_read(info->rtc, MAX8925_RTC_STATUS); if (ret < 0) goto out; @@ -204,6 +212,7 @@ static int max8925_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) alrm->pending = 1; else alrm->pending = 0; + return 0; out: return ret; } @@ -220,8 +229,11 @@ static int max8925_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) ret = max8925_bulk_write(info->rtc, MAX8925_ALARM0_SEC, TIME_NUM, buf); if (ret < 0) goto out; - /* only enable alarm on year/month/day/hour/min/sec */ - ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77); + if (alrm->enabled) + /* only enable alarm on year/month/day/hour/min/sec */ + ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77); + else + ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x0); if (ret < 0) goto out; out: @@ -235,79 +247,80 @@ static const struct rtc_class_ops max8925_rtc_ops = { .set_alarm = max8925_rtc_set_alarm, }; -static int __devinit max8925_rtc_probe(struct platform_device *pdev) +static int max8925_rtc_probe(struct platform_device *pdev) { struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent); struct max8925_rtc_info *info; - int irq, ret; + int ret; - info = kzalloc(sizeof(struct max8925_rtc_info), GFP_KERNEL); + info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_rtc_info), + GFP_KERNEL); if (!info) return -ENOMEM; info->chip = chip; info->rtc = chip->rtc; info->dev = &pdev->dev; - irq = chip->irq_base + MAX8925_IRQ_RTC_ALARM0; + info->irq = platform_get_irq(pdev, 0); - ret = request_threaded_irq(irq, NULL, rtc_update_handler, - IRQF_ONESHOT, "rtc-alarm0", info); + ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, + rtc_update_handler, IRQF_ONESHOT, + "rtc-alarm0", info); if (ret < 0) { dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", - irq, ret); - goto out_irq; + info->irq, ret); + return ret; } - info->rtc_dev = rtc_device_register("max8925-rtc", &pdev->dev, + dev_set_drvdata(&pdev->dev, info); + /* XXX - isn't this redundant? */ + platform_set_drvdata(pdev, info); + + device_init_wakeup(&pdev->dev, 1); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8925-rtc", &max8925_rtc_ops, THIS_MODULE); ret = PTR_ERR(info->rtc_dev); if (IS_ERR(info->rtc_dev)) { dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); - goto out_rtc; + return ret; } - dev_set_drvdata(&pdev->dev, info); - platform_set_drvdata(pdev, info); - return 0; -out_rtc: - free_irq(chip->irq_base + MAX8925_IRQ_RTC_ALARM0, info); -out_irq: - kfree(info); - return ret; } -static int __devexit max8925_rtc_remove(struct platform_device *pdev) +#ifdef CONFIG_PM_SLEEP +static int max8925_rtc_suspend(struct device *dev) { - struct max8925_rtc_info *info = platform_get_drvdata(pdev); + struct platform_device *pdev = to_platform_device(dev); + struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent); - if (info) { - free_irq(info->chip->irq_base + MAX8925_IRQ_RTC_ALARM0, info); - rtc_device_unregister(info->rtc_dev); - kfree(info); - } + if (device_may_wakeup(dev)) + chip->wakeup_flag |= 1 << MAX8925_IRQ_RTC_ALARM0; + return 0; +} +static int max8925_rtc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent); + + if (device_may_wakeup(dev)) + chip->wakeup_flag &= ~(1 << MAX8925_IRQ_RTC_ALARM0); return 0; } +#endif + +static SIMPLE_DEV_PM_OPS(max8925_rtc_pm_ops, max8925_rtc_suspend, max8925_rtc_resume); static struct platform_driver max8925_rtc_driver = { .driver = { .name = "max8925-rtc", .owner = THIS_MODULE, + .pm = &max8925_rtc_pm_ops, }, .probe = max8925_rtc_probe, - .remove = __devexit_p(max8925_rtc_remove), }; -static int __init max8925_rtc_init(void) -{ - return platform_driver_register(&max8925_rtc_driver); -} -module_init(max8925_rtc_init); - -static void __exit max8925_rtc_exit(void) -{ - platform_driver_unregister(&max8925_rtc_driver); -} -module_exit(max8925_rtc_exit); +module_platform_driver(max8925_rtc_driver); MODULE_DESCRIPTION("Maxim MAX8925 RTC driver"); MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c new file mode 100644 index 00000000000..0777c01b58e --- /dev/null +++ b/drivers/rtc/rtc-max8997.c @@ -0,0 +1,537 @@ +/* + * RTC driver for Maxim MAX8997 + * + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * + * based on rtc-max8998.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/slab.h> +#include <linux/rtc.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/mfd/max8997-private.h> +#include <linux/irqdomain.h> + +/* Module parameter for WTSR function control */ +static int wtsr_en = 1; +module_param(wtsr_en, int, 0444); +MODULE_PARM_DESC(wtsr_en, "Watchdog Timeout & Software Reset (default=on)"); +/* Module parameter for SMPL function control */ +static int smpl_en = 1; +module_param(smpl_en, int, 0444); +MODULE_PARM_DESC(smpl_en, "Sudden Momentary Power Loss (default=on)"); + +/* RTC Control Register */ +#define BCD_EN_SHIFT 0 +#define BCD_EN_MASK (1 << BCD_EN_SHIFT) +#define MODEL24_SHIFT 1 +#define MODEL24_MASK (1 << MODEL24_SHIFT) +/* RTC Update Register1 */ +#define RTC_UDR_SHIFT 0 +#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT) +/* WTSR and SMPL Register */ +#define WTSRT_SHIFT 0 +#define SMPLT_SHIFT 2 +#define WTSR_EN_SHIFT 6 +#define SMPL_EN_SHIFT 7 +#define WTSRT_MASK (3 << WTSRT_SHIFT) +#define SMPLT_MASK (3 << SMPLT_SHIFT) +#define WTSR_EN_MASK (1 << WTSR_EN_SHIFT) +#define SMPL_EN_MASK (1 << SMPL_EN_SHIFT) +/* RTC Hour register */ +#define HOUR_PM_SHIFT 6 +#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT) +/* RTC Alarm Enable */ +#define ALARM_ENABLE_SHIFT 7 +#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT) + +enum { + RTC_SEC = 0, + RTC_MIN, + RTC_HOUR, + RTC_WEEKDAY, + RTC_MONTH, + RTC_YEAR, + RTC_DATE, + RTC_NR_TIME +}; + +struct max8997_rtc_info { + struct device *dev; + struct max8997_dev *max8997; + struct i2c_client *rtc; + struct rtc_device *rtc_dev; + struct mutex lock; + int virq; + int rtc_24hr_mode; +}; + +static void max8997_rtc_data_to_tm(u8 *data, struct rtc_time *tm, + int rtc_24hr_mode) +{ + tm->tm_sec = data[RTC_SEC] & 0x7f; + tm->tm_min = data[RTC_MIN] & 0x7f; + if (rtc_24hr_mode) + tm->tm_hour = data[RTC_HOUR] & 0x1f; + else { + tm->tm_hour = data[RTC_HOUR] & 0x0f; + if (data[RTC_HOUR] & HOUR_PM_MASK) + tm->tm_hour += 12; + } + + tm->tm_wday = fls(data[RTC_WEEKDAY] & 0x7f) - 1; + tm->tm_mday = data[RTC_DATE] & 0x1f; + tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; + tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100; + tm->tm_yday = 0; + tm->tm_isdst = 0; +} + +static int max8997_rtc_tm_to_data(struct rtc_time *tm, u8 *data) +{ + data[RTC_SEC] = tm->tm_sec; + data[RTC_MIN] = tm->tm_min; + data[RTC_HOUR] = tm->tm_hour; + data[RTC_WEEKDAY] = 1 << tm->tm_wday; + data[RTC_DATE] = tm->tm_mday; + data[RTC_MONTH] = tm->tm_mon + 1; + data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; + + if (tm->tm_year < 100) { + pr_warn("%s: MAX8997 RTC cannot handle the year %d." + "Assume it's 2000.\n", __func__, 1900 + tm->tm_year); + return -EINVAL; + } + return 0; +} + +static inline int max8997_rtc_set_update_reg(struct max8997_rtc_info *info) +{ + int ret; + + ret = max8997_write_reg(info->rtc, MAX8997_RTC_UPDATE1, + RTC_UDR_MASK); + if (ret < 0) + dev_err(info->dev, "%s: fail to write update reg(%d)\n", + __func__, ret); + else { + /* Minimum 16ms delay required before RTC update. + * Otherwise, we may read and update based on out-of-date + * value */ + msleep(20); + } + + return ret; +} + +static int max8997_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct max8997_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + mutex_lock(&info->lock); + ret = max8997_bulk_read(info->rtc, MAX8997_RTC_SEC, RTC_NR_TIME, data); + mutex_unlock(&info->lock); + + if (ret < 0) { + dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, + ret); + return ret; + } + + max8997_rtc_data_to_tm(data, tm, info->rtc_24hr_mode); + + return rtc_valid_tm(tm); +} + +static int max8997_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct max8997_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + ret = max8997_rtc_tm_to_data(tm, data); + if (ret < 0) + return ret; + + mutex_lock(&info->lock); + + ret = max8997_bulk_write(info->rtc, MAX8997_RTC_SEC, RTC_NR_TIME, data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, + ret); + goto out; + } + + ret = max8997_rtc_set_update_reg(info); +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max8997_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max8997_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + u8 val; + int i, ret; + + mutex_lock(&info->lock); + + ret = max8997_bulk_read(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME, + data); + if (ret < 0) { + dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", + __func__, __LINE__, ret); + goto out; + } + + max8997_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); + + alrm->enabled = 0; + for (i = 0; i < RTC_NR_TIME; i++) { + if (data[i] & ALARM_ENABLE_MASK) { + alrm->enabled = 1; + break; + } + } + + alrm->pending = 0; + ret = max8997_read_reg(info->max8997->i2c, MAX8997_REG_STATUS1, &val); + if (ret < 0) { + dev_err(info->dev, "%s:%d fail to read status1 reg(%d)\n", + __func__, __LINE__, ret); + goto out; + } + + if (val & (1 << 4)) /* RTCA1 */ + alrm->pending = 1; + +out: + mutex_unlock(&info->lock); + return 0; +} + +static int max8997_rtc_stop_alarm(struct max8997_rtc_info *info) +{ + u8 data[RTC_NR_TIME]; + int ret, i; + + if (!mutex_is_locked(&info->lock)) + dev_warn(info->dev, "%s: should have mutex locked\n", __func__); + + ret = max8997_bulk_read(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME, + data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", + __func__, ret); + goto out; + } + + for (i = 0; i < RTC_NR_TIME; i++) + data[i] &= ~ALARM_ENABLE_MASK; + + ret = max8997_bulk_write(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME, + data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max8997_rtc_set_update_reg(info); +out: + return ret; +} + +static int max8997_rtc_start_alarm(struct max8997_rtc_info *info) +{ + u8 data[RTC_NR_TIME]; + int ret; + + if (!mutex_is_locked(&info->lock)) + dev_warn(info->dev, "%s: should have mutex locked\n", __func__); + + ret = max8997_bulk_read(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME, + data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", + __func__, ret); + goto out; + } + + data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; + if (data[RTC_MONTH] & 0xf) + data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); + if (data[RTC_YEAR] & 0x7f) + data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); + if (data[RTC_DATE] & 0x1f) + data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); + + ret = max8997_bulk_write(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME, + data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max8997_rtc_set_update_reg(info); +out: + return ret; +} +static int max8997_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max8997_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + ret = max8997_rtc_tm_to_data(&alrm->time, data); + if (ret < 0) + return ret; + + dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d\n", __func__, + data[RTC_YEAR] + 2000, data[RTC_MONTH], data[RTC_DATE], + data[RTC_HOUR], data[RTC_MIN], data[RTC_SEC]); + + mutex_lock(&info->lock); + + ret = max8997_rtc_stop_alarm(info); + if (ret < 0) + goto out; + + ret = max8997_bulk_write(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME, + data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max8997_rtc_set_update_reg(info); + if (ret < 0) + goto out; + + if (alrm->enabled) + ret = max8997_rtc_start_alarm(info); +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max8997_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct max8997_rtc_info *info = dev_get_drvdata(dev); + int ret; + + mutex_lock(&info->lock); + if (enabled) + ret = max8997_rtc_start_alarm(info); + else + ret = max8997_rtc_stop_alarm(info); + mutex_unlock(&info->lock); + + return ret; +} + +static irqreturn_t max8997_rtc_alarm_irq(int irq, void *data) +{ + struct max8997_rtc_info *info = data; + + dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); + + rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops max8997_rtc_ops = { + .read_time = max8997_rtc_read_time, + .set_time = max8997_rtc_set_time, + .read_alarm = max8997_rtc_read_alarm, + .set_alarm = max8997_rtc_set_alarm, + .alarm_irq_enable = max8997_rtc_alarm_irq_enable, +}; + +static void max8997_rtc_enable_wtsr(struct max8997_rtc_info *info, bool enable) +{ + int ret; + u8 val, mask; + + if (!wtsr_en) + return; + + if (enable) + val = (1 << WTSR_EN_SHIFT) | (3 << WTSRT_SHIFT); + else + val = 0; + + mask = WTSR_EN_MASK | WTSRT_MASK; + + dev_info(info->dev, "%s: %s WTSR\n", __func__, + enable ? "enable" : "disable"); + + ret = max8997_update_reg(info->rtc, MAX8997_RTC_WTSR_SMPL, val, mask); + if (ret < 0) { + dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", + __func__, ret); + return; + } + + max8997_rtc_set_update_reg(info); +} + +static void max8997_rtc_enable_smpl(struct max8997_rtc_info *info, bool enable) +{ + int ret; + u8 val, mask; + + if (!smpl_en) + return; + + if (enable) + val = (1 << SMPL_EN_SHIFT) | (0 << SMPLT_SHIFT); + else + val = 0; + + mask = SMPL_EN_MASK | SMPLT_MASK; + + dev_info(info->dev, "%s: %s SMPL\n", __func__, + enable ? "enable" : "disable"); + + ret = max8997_update_reg(info->rtc, MAX8997_RTC_WTSR_SMPL, val, mask); + if (ret < 0) { + dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", + __func__, ret); + return; + } + + max8997_rtc_set_update_reg(info); + + val = 0; + max8997_read_reg(info->rtc, MAX8997_RTC_WTSR_SMPL, &val); + pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val); +} + +static int max8997_rtc_init_reg(struct max8997_rtc_info *info) +{ + u8 data[2]; + int ret; + + /* Set RTC control register : Binary mode, 24hour mdoe */ + data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + + info->rtc_24hr_mode = 1; + + ret = max8997_bulk_write(info->rtc, MAX8997_RTC_CTRLMASK, 2, data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", + __func__, ret); + return ret; + } + + ret = max8997_rtc_set_update_reg(info); + return ret; +} + +static int max8997_rtc_probe(struct platform_device *pdev) +{ + struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); + struct max8997_rtc_info *info; + int ret, virq; + + info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_rtc_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + mutex_init(&info->lock); + info->dev = &pdev->dev; + info->max8997 = max8997; + info->rtc = max8997->rtc; + + platform_set_drvdata(pdev, info); + + ret = max8997_rtc_init_reg(info); + + if (ret < 0) { + dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); + return ret; + } + + max8997_rtc_enable_wtsr(info, true); + max8997_rtc_enable_smpl(info, true); + + device_init_wakeup(&pdev->dev, 1); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8997-rtc", + &max8997_rtc_ops, THIS_MODULE); + + if (IS_ERR(info->rtc_dev)) { + ret = PTR_ERR(info->rtc_dev); + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); + return ret; + } + + virq = irq_create_mapping(max8997->irq_domain, MAX8997_PMICIRQ_RTCA1); + if (!virq) { + dev_err(&pdev->dev, "Failed to create mapping alarm IRQ\n"); + ret = -ENXIO; + goto err_out; + } + info->virq = virq; + + ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, + max8997_rtc_alarm_irq, 0, + "rtc-alarm0", info); + if (ret < 0) + dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", + info->virq, ret); + +err_out: + return ret; +} + +static void max8997_rtc_shutdown(struct platform_device *pdev) +{ + struct max8997_rtc_info *info = platform_get_drvdata(pdev); + + max8997_rtc_enable_wtsr(info, false); + max8997_rtc_enable_smpl(info, false); +} + +static const struct platform_device_id rtc_id[] = { + { "max8997-rtc", 0 }, + {}, +}; + +static struct platform_driver max8997_rtc_driver = { + .driver = { + .name = "max8997-rtc", + .owner = THIS_MODULE, + }, + .probe = max8997_rtc_probe, + .shutdown = max8997_rtc_shutdown, + .id_table = rtc_id, +}; + +module_platform_driver(max8997_rtc_driver); + +MODULE_DESCRIPTION("Maxim MAX8997 RTC driver"); +MODULE_AUTHOR("<ms925.kim@samsung.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c index f22dee35f33..f098ad8382d 100644 --- a/drivers/rtc/rtc-max8998.c +++ b/drivers/rtc/rtc-max8998.c @@ -16,10 +16,12 @@ #include <linux/i2c.h> #include <linux/slab.h> #include <linux/bcd.h> +#include <linux/irqdomain.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/mfd/max8998.h> #include <linux/mfd/max8998-private.h> +#include <linux/delay.h> #define MAX8998_RTC_SEC 0x00 #define MAX8998_RTC_MIN 0x01 @@ -73,6 +75,7 @@ struct max8998_rtc_info { struct i2c_client *rtc; struct rtc_device *rtc_dev; int irq; + bool lp3974_bug_workaround; }; static void max8998_data_to_tm(u8 *data, struct rtc_time *tm) @@ -124,10 +127,16 @@ static int max8998_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct max8998_rtc_info *info = dev_get_drvdata(dev); u8 data[8]; + int ret; max8998_tm_to_data(tm, data); - return max8998_bulk_write(info->rtc, MAX8998_RTC_SEC, 8, data); + ret = max8998_bulk_write(info->rtc, MAX8998_RTC_SEC, 8, data); + + if (info->lp3974_bug_workaround) + msleep(2000); + + return ret; } static int max8998_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) @@ -163,12 +172,29 @@ static int max8998_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static int max8998_rtc_stop_alarm(struct max8998_rtc_info *info) { - return max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, 0); + int ret = max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, 0); + + if (info->lp3974_bug_workaround) + msleep(2000); + + return ret; } static int max8998_rtc_start_alarm(struct max8998_rtc_info *info) { - return max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, 0x77); + int ret; + u8 alarm0_conf = 0x77; + + /* LP3974 with delay bug chips has rtc alarm bugs with "MONTH" field */ + if (info->lp3974_bug_workaround) + alarm0_conf = 0x57; + + ret = max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, alarm0_conf); + + if (info->lp3974_bug_workaround) + msleep(2000); + + return ret; } static int max8998_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) @@ -187,10 +213,13 @@ static int max8998_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) if (ret < 0) return ret; + if (info->lp3974_bug_workaround) + msleep(2000); + if (alrm->enabled) - return max8998_rtc_start_alarm(info); + ret = max8998_rtc_start_alarm(info); - return 0; + return ret; } static int max8998_rtc_alarm_irq_enable(struct device *dev, @@ -221,78 +250,76 @@ static const struct rtc_class_ops max8998_rtc_ops = { .alarm_irq_enable = max8998_rtc_alarm_irq_enable, }; -static int __devinit max8998_rtc_probe(struct platform_device *pdev) +static int max8998_rtc_probe(struct platform_device *pdev) { struct max8998_dev *max8998 = dev_get_drvdata(pdev->dev.parent); + struct max8998_platform_data *pdata = max8998->pdata; struct max8998_rtc_info *info; int ret; - info = kzalloc(sizeof(struct max8998_rtc_info), GFP_KERNEL); + info = devm_kzalloc(&pdev->dev, sizeof(struct max8998_rtc_info), + GFP_KERNEL); if (!info) return -ENOMEM; info->dev = &pdev->dev; info->max8998 = max8998; info->rtc = max8998->rtc; - info->irq = max8998->irq_base + MAX8998_IRQ_ALARM0; - info->rtc_dev = rtc_device_register("max8998-rtc", &pdev->dev, + platform_set_drvdata(pdev, info); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8998-rtc", &max8998_rtc_ops, THIS_MODULE); if (IS_ERR(info->rtc_dev)) { ret = PTR_ERR(info->rtc_dev); dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); - goto out_rtc; + return ret; } - platform_set_drvdata(pdev, info); + if (!max8998->irq_domain) + goto no_irq; + + info->irq = irq_create_mapping(max8998->irq_domain, MAX8998_IRQ_ALARM0); + if (!info->irq) { + dev_warn(&pdev->dev, "Failed to map alarm IRQ\n"); + goto no_irq; + } + + ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, + max8998_rtc_alarm_irq, 0, "rtc-alarm0", info); - ret = request_threaded_irq(info->irq, NULL, max8998_rtc_alarm_irq, 0, - "rtc-alarm0", info); if (ret < 0) dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", info->irq, ret); - return 0; - -out_rtc: - kfree(info); - return ret; -} - -static int __devexit max8998_rtc_remove(struct platform_device *pdev) -{ - struct max8998_rtc_info *info = platform_get_drvdata(pdev); - - if (info) { - free_irq(info->irq, info); - rtc_device_unregister(info->rtc_dev); - kfree(info); +no_irq: + dev_info(&pdev->dev, "RTC CHIP NAME: %s\n", pdev->id_entry->name); + if (pdata && pdata->rtc_delay) { + info->lp3974_bug_workaround = true; + dev_warn(&pdev->dev, "LP3974 with RTC REGERR option." + " RTC updates will be extremely slow.\n"); } return 0; } +static const struct platform_device_id max8998_rtc_id[] = { + { "max8998-rtc", TYPE_MAX8998 }, + { "lp3974-rtc", TYPE_LP3974 }, + { } +}; + static struct platform_driver max8998_rtc_driver = { .driver = { .name = "max8998-rtc", .owner = THIS_MODULE, }, .probe = max8998_rtc_probe, - .remove = __devexit_p(max8998_rtc_remove), + .id_table = max8998_rtc_id, }; -static int __init max8998_rtc_init(void) -{ - return platform_driver_register(&max8998_rtc_driver); -} -module_init(max8998_rtc_init); - -static void __exit max8998_rtc_exit(void) -{ - platform_driver_unregister(&max8998_rtc_driver); -} -module_exit(max8998_rtc_exit); +module_platform_driver(max8998_rtc_driver); MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>"); MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c index 5314b153bfb..0765606a2d1 100644 --- a/drivers/rtc/rtc-mc13xxx.c +++ b/drivers/rtc/rtc-mc13xxx.c @@ -23,6 +23,8 @@ #define MC13XXX_RTCDAY 22 #define MC13XXX_RTCDAYA 23 +#define SEC_PER_DAY (24 * 60 * 60) + struct mc13xxx_rtc { struct rtc_device *rtc; struct mc13xxx *mc13xxx; @@ -42,15 +44,15 @@ static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev, return func(priv->mc13xxx, irq); } -static int mc13xxx_rtc_irq_enable(struct device *dev, - unsigned int enabled, int irq) +static int mc13xxx_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) { struct mc13xxx_rtc *priv = dev_get_drvdata(dev); int ret; mc13xxx_lock(priv->mc13xxx); - ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, irq); + ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA); mc13xxx_unlock(priv->mc13xxx); @@ -61,44 +63,27 @@ static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct mc13xxx_rtc *priv = dev_get_drvdata(dev); unsigned int seconds, days1, days2; - unsigned long s1970; - int ret; - - mc13xxx_lock(priv->mc13xxx); - - if (!priv->valid) { - ret = -ENODATA; - goto out; - } - - ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1); - if (unlikely(ret)) - goto out; - ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds); - if (unlikely(ret)) - goto out; + if (!priv->valid) + return -ENODATA; - ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2); -out: - mc13xxx_unlock(priv->mc13xxx); + do { + int ret; - if (ret) - return ret; + ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1); + if (ret) + return ret; - if (days2 == days1 + 1) { - if (seconds >= 86400 / 2) - days2 = days1; - else - days1 = days2; - } - - if (days1 != days2) - return -EIO; + ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds); + if (ret) + return ret; - s1970 = days1 * 86400 + seconds; + ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2); + if (ret) + return ret; + } while (days1 != days2); - rtc_time_to_tm(s1970, tm); + rtc_time_to_tm(days1 * SEC_PER_DAY + seconds, tm); return rtc_valid_tm(tm); } @@ -110,8 +95,8 @@ static int mc13xxx_rtc_set_mmss(struct device *dev, unsigned long secs) unsigned int alarmseconds; int ret; - seconds = secs % 86400; - days = secs / 86400; + seconds = secs % SEC_PER_DAY; + days = secs / SEC_PER_DAY; mc13xxx_lock(priv->mc13xxx); @@ -123,7 +108,7 @@ static int mc13xxx_rtc_set_mmss(struct device *dev, unsigned long secs) if (unlikely(ret)) goto out; - if (alarmseconds < 86400) { + if (alarmseconds < SEC_PER_DAY) { ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff); if (unlikely(ret)) @@ -147,18 +132,21 @@ static int mc13xxx_rtc_set_mmss(struct device *dev, unsigned long secs) goto out; /* restore alarm */ - if (alarmseconds < 86400) { + if (alarmseconds < SEC_PER_DAY) { ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, alarmseconds); if (unlikely(ret)) goto out; } - ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST); - if (unlikely(ret)) - goto out; + if (!priv->valid) { + ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST); + if (unlikely(ret)) + goto out; + + ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST); + } - ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST); out: priv->valid = !ret; @@ -180,7 +168,7 @@ static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds); if (unlikely(ret)) goto out; - if (seconds >= 86400) { + if (seconds >= SEC_PER_DAY) { ret = -ENODATA; goto out; } @@ -201,7 +189,7 @@ out: alarm->enabled = enabled; alarm->pending = pending; - s1970 = days * 86400 + seconds; + s1970 = days * SEC_PER_DAY + seconds; rtc_time_to_tm(s1970, &alarm->time); dev_dbg(dev, "%s: %lu\n", __func__, s1970); @@ -239,8 +227,8 @@ static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) if (unlikely(ret)) goto out; - seconds = s1970 % 86400; - days = s1970 / 86400; + seconds = s1970 % SEC_PER_DAY; + days = s1970 / SEC_PER_DAY; ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days); if (unlikely(ret)) @@ -259,8 +247,6 @@ static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev) struct mc13xxx_rtc *priv = dev; struct mc13xxx *mc13xxx = priv->mc13xxx; - dev_dbg(&priv->rtc->dev, "Alarm\n"); - rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF); mc13xxx_irq_ack(mc13xxx, irq); @@ -273,8 +259,6 @@ static irqreturn_t mc13xxx_rtc_update_handler(int irq, void *dev) struct mc13xxx_rtc *priv = dev; struct mc13xxx *mc13xxx = priv->mc13xxx; - dev_dbg(&priv->rtc->dev, "1HZ\n"); - rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF); mc13xxx_irq_ack(mc13xxx, irq); @@ -282,25 +266,12 @@ static irqreturn_t mc13xxx_rtc_update_handler(int irq, void *dev) return IRQ_HANDLED; } -static int mc13xxx_rtc_update_irq_enable(struct device *dev, - unsigned int enabled) -{ - return mc13xxx_rtc_irq_enable(dev, enabled, MC13XXX_IRQ_1HZ); -} - -static int mc13xxx_rtc_alarm_irq_enable(struct device *dev, - unsigned int enabled) -{ - return mc13xxx_rtc_irq_enable(dev, enabled, MC13XXX_IRQ_TODA); -} - static const struct rtc_class_ops mc13xxx_rtc_ops = { .read_time = mc13xxx_rtc_read_time, .set_mmss = mc13xxx_rtc_set_mmss, .read_alarm = mc13xxx_rtc_read_alarm, .set_alarm = mc13xxx_rtc_set_alarm, .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable, - .update_irq_enable = mc13xxx_rtc_update_irq_enable, }; static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev) @@ -308,7 +279,6 @@ static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev) struct mc13xxx_rtc *priv = dev; struct mc13xxx *mc13xxx = priv->mc13xxx; - dev_dbg(&priv->rtc->dev, "RTCRST\n"); priv->valid = 0; mc13xxx_irq_mask(mc13xxx, irq); @@ -316,122 +286,96 @@ static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev) return IRQ_HANDLED; } -static int __devinit mc13xxx_rtc_probe(struct platform_device *pdev) +static int __init mc13xxx_rtc_probe(struct platform_device *pdev) { int ret; struct mc13xxx_rtc *priv; struct mc13xxx *mc13xxx; - int rtcrst_pending; - priv = kzalloc(sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; mc13xxx = dev_get_drvdata(pdev->dev.parent); priv->mc13xxx = mc13xxx; + priv->valid = 1; platform_set_drvdata(pdev, priv); mc13xxx_lock(mc13xxx); + mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST); + ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST, mc13xxx_rtc_reset_handler, DRIVER_NAME, priv); if (ret) - goto err_reset_irq_request; - - ret = mc13xxx_irq_status(mc13xxx, MC13XXX_IRQ_RTCRST, - NULL, &rtcrst_pending); - if (ret) - goto err_reset_irq_status; - - priv->valid = !rtcrst_pending; + goto err_irq_request; - ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_1HZ, + ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_1HZ, mc13xxx_rtc_update_handler, DRIVER_NAME, priv); if (ret) - goto err_update_irq_request; + goto err_irq_request; ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA, mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv); if (ret) - goto err_alarm_irq_request; + goto err_irq_request; - priv->rtc = rtc_device_register(pdev->name, - &pdev->dev, &mc13xxx_rtc_ops, THIS_MODULE); - if (IS_ERR(priv->rtc)) { - ret = PTR_ERR(priv->rtc); - - mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv); -err_alarm_irq_request: + mc13xxx_unlock(mc13xxx); - mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_1HZ, priv); -err_update_irq_request: + priv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &mc13xxx_rtc_ops, THIS_MODULE); -err_reset_irq_status: + return 0; - mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv); -err_reset_irq_request: - - platform_set_drvdata(pdev, NULL); - kfree(priv); - } +err_irq_request: + mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv); + mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_1HZ, priv); + mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv); mc13xxx_unlock(mc13xxx); return ret; } -static int __devexit mc13xxx_rtc_remove(struct platform_device *pdev) +static int mc13xxx_rtc_remove(struct platform_device *pdev) { struct mc13xxx_rtc *priv = platform_get_drvdata(pdev); mc13xxx_lock(priv->mc13xxx); - rtc_device_unregister(priv->rtc); - mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv); mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_1HZ, priv); mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv); mc13xxx_unlock(priv->mc13xxx); - platform_set_drvdata(pdev, NULL); - - kfree(priv); - return 0; } -const struct platform_device_id mc13xxx_rtc_idtable[] = { +static const struct platform_device_id mc13xxx_rtc_idtable[] = { { .name = "mc13783-rtc", }, { .name = "mc13892-rtc", + }, { + .name = "mc34708-rtc", }, + { /* sentinel */ } }; +MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable); static struct platform_driver mc13xxx_rtc_driver = { .id_table = mc13xxx_rtc_idtable, - .remove = __devexit_p(mc13xxx_rtc_remove), + .remove = mc13xxx_rtc_remove, .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, }, }; -static int __init mc13xxx_rtc_init(void) -{ - return platform_driver_probe(&mc13xxx_rtc_driver, &mc13xxx_rtc_probe); -} -module_init(mc13xxx_rtc_init); - -static void __exit mc13xxx_rtc_exit(void) -{ - platform_driver_unregister(&mc13xxx_rtc_driver); -} -module_exit(mc13xxx_rtc_exit); +module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe); MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC"); MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:" DRIVER_NAME); diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c new file mode 100644 index 00000000000..34295bf0041 --- /dev/null +++ b/drivers/rtc/rtc-mcp795.c @@ -0,0 +1,199 @@ +/* + * SPI Driver for Microchip MCP795 RTC + * + * Copyright (C) Josef Gajdusek <atx@atx.name> + * + * based on other Linux RTC drivers + * + * Device datasheet: + * http://ww1.microchip.com/downloads/en/DeviceDoc/22280A.pdf + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/printk.h> +#include <linux/spi/spi.h> +#include <linux/rtc.h> + +/* MCP795 Instructions, see datasheet table 3-1 */ +#define MCP795_EEREAD 0x03 +#define MCP795_EEWRITE 0x02 +#define MCP795_EEWRDI 0x04 +#define MCP795_EEWREN 0x06 +#define MCP795_SRREAD 0x05 +#define MCP795_SRWRITE 0x01 +#define MCP795_READ 0x13 +#define MCP795_WRITE 0x12 +#define MCP795_UNLOCK 0x14 +#define MCP795_IDWRITE 0x32 +#define MCP795_IDREAD 0x33 +#define MCP795_CLRWDT 0x44 +#define MCP795_CLRRAM 0x54 + +#define MCP795_ST_BIT 0x80 +#define MCP795_24_BIT 0x40 + +static int mcp795_rtcc_read(struct device *dev, u8 addr, u8 *buf, u8 count) +{ + struct spi_device *spi = to_spi_device(dev); + int ret; + u8 tx[2]; + + tx[0] = MCP795_READ; + tx[1] = addr; + ret = spi_write_then_read(spi, tx, sizeof(tx), buf, count); + + if (ret) + dev_err(dev, "Failed reading %d bytes from address %x.\n", + count, addr); + + return ret; +} + +static int mcp795_rtcc_write(struct device *dev, u8 addr, u8 *data, u8 count) +{ + struct spi_device *spi = to_spi_device(dev); + int ret; + u8 tx[2 + count]; + + tx[0] = MCP795_WRITE; + tx[1] = addr; + memcpy(&tx[2], data, count); + + ret = spi_write(spi, tx, 2 + count); + + if (ret) + dev_err(dev, "Failed to write %d bytes to address %x.\n", + count, addr); + + return ret; +} + +static int mcp795_rtcc_set_bits(struct device *dev, u8 addr, u8 mask, u8 state) +{ + int ret; + u8 tmp; + + ret = mcp795_rtcc_read(dev, addr, &tmp, 1); + if (ret) + return ret; + + if ((tmp & mask) != state) { + tmp = (tmp & ~mask) | state; + ret = mcp795_rtcc_write(dev, addr, &tmp, 1); + } + + return ret; +} + +static int mcp795_set_time(struct device *dev, struct rtc_time *tim) +{ + int ret; + u8 data[7]; + + /* Read first, so we can leave config bits untouched */ + ret = mcp795_rtcc_read(dev, 0x01, data, sizeof(data)); + + if (ret) + return ret; + + data[0] = (data[0] & 0x80) | ((tim->tm_sec / 10) << 4) | (tim->tm_sec % 10); + data[1] = (data[1] & 0x80) | ((tim->tm_min / 10) << 4) | (tim->tm_min % 10); + data[2] = ((tim->tm_hour / 10) << 4) | (tim->tm_hour % 10); + data[4] = ((tim->tm_mday / 10) << 4) | ((tim->tm_mday) % 10); + data[5] = (data[5] & 0x10) | (tim->tm_mon / 10) | (tim->tm_mon % 10); + + if (tim->tm_year > 100) + tim->tm_year -= 100; + + data[6] = ((tim->tm_year / 10) << 4) | (tim->tm_year % 10); + + ret = mcp795_rtcc_write(dev, 0x01, data, sizeof(data)); + + if (ret) + return ret; + + dev_dbg(dev, "Set mcp795: %04d-%02d-%02d %02d:%02d:%02d\n", + tim->tm_year + 1900, tim->tm_mon, tim->tm_mday, + tim->tm_hour, tim->tm_min, tim->tm_sec); + + return 0; +} + +static int mcp795_read_time(struct device *dev, struct rtc_time *tim) +{ + int ret; + u8 data[7]; + + ret = mcp795_rtcc_read(dev, 0x01, data, sizeof(data)); + + if (ret) + return ret; + + tim->tm_sec = ((data[0] & 0x70) >> 4) * 10 + (data[0] & 0x0f); + tim->tm_min = ((data[1] & 0x70) >> 4) * 10 + (data[1] & 0x0f); + tim->tm_hour = ((data[2] & 0x30) >> 4) * 10 + (data[2] & 0x0f); + tim->tm_mday = ((data[4] & 0x30) >> 4) * 10 + (data[4] & 0x0f); + tim->tm_mon = ((data[5] & 0x10) >> 4) * 10 + (data[5] & 0x0f); + tim->tm_year = ((data[6] & 0xf0) >> 4) * 10 + (data[6] & 0x0f) + 100; /* Assume we are in 20xx */ + + dev_dbg(dev, "Read from mcp795: %04d-%02d-%02d %02d:%02d:%02d\n", + tim->tm_year + 1900, tim->tm_mon, tim->tm_mday, + tim->tm_hour, tim->tm_min, tim->tm_sec); + + return rtc_valid_tm(tim); +} + +static struct rtc_class_ops mcp795_rtc_ops = { + .read_time = mcp795_read_time, + .set_time = mcp795_set_time +}; + +static int mcp795_probe(struct spi_device *spi) +{ + struct rtc_device *rtc; + int ret; + + spi->mode = SPI_MODE_0; + spi->bits_per_word = 8; + ret = spi_setup(spi); + if (ret) { + dev_err(&spi->dev, "Unable to setup SPI\n"); + return ret; + } + + /* Start the oscillator */ + mcp795_rtcc_set_bits(&spi->dev, 0x01, MCP795_ST_BIT, MCP795_ST_BIT); + /* Clear the 12 hour mode flag*/ + mcp795_rtcc_set_bits(&spi->dev, 0x03, MCP795_24_BIT, 0); + + rtc = devm_rtc_device_register(&spi->dev, "rtc-mcp795", + &mcp795_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + spi_set_drvdata(spi, rtc); + + return 0; +} + +static struct spi_driver mcp795_driver = { + .driver = { + .name = "rtc-mcp795", + .owner = THIS_MODULE, + }, + .probe = mcp795_probe, +}; + +module_spi_driver(mcp795_driver); + +MODULE_DESCRIPTION("MCP795 RTC SPI Driver"); +MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:mcp795"); diff --git a/drivers/rtc/rtc-moxart.c b/drivers/rtc/rtc-moxart.c new file mode 100644 index 00000000000..c3184623887 --- /dev/null +++ b/drivers/rtc/rtc-moxart.c @@ -0,0 +1,328 @@ +/* + * MOXA ART RTC driver. + * + * Copyright (C) 2013 Jonas Jensen + * + * Jonas Jensen <jonas.jensen@gmail.com> + * + * Based on code from + * Moxa Technology Co., Ltd. <www.moxa.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> + +#define GPIO_RTC_RESERVED 0x0C +#define GPIO_RTC_DATA_SET 0x10 +#define GPIO_RTC_DATA_CLEAR 0x14 +#define GPIO_RTC_PIN_PULL_ENABLE 0x18 +#define GPIO_RTC_PIN_PULL_TYPE 0x1C +#define GPIO_RTC_INT_ENABLE 0x20 +#define GPIO_RTC_INT_RAW_STATE 0x24 +#define GPIO_RTC_INT_MASKED_STATE 0x28 +#define GPIO_RTC_INT_MASK 0x2C +#define GPIO_RTC_INT_CLEAR 0x30 +#define GPIO_RTC_INT_TRIGGER 0x34 +#define GPIO_RTC_INT_BOTH 0x38 +#define GPIO_RTC_INT_RISE_NEG 0x3C +#define GPIO_RTC_BOUNCE_ENABLE 0x40 +#define GPIO_RTC_BOUNCE_PRE_SCALE 0x44 +#define GPIO_RTC_PROTECT_W 0x8E +#define GPIO_RTC_PROTECT_R 0x8F +#define GPIO_RTC_YEAR_W 0x8C +#define GPIO_RTC_YEAR_R 0x8D +#define GPIO_RTC_DAY_W 0x8A +#define GPIO_RTC_DAY_R 0x8B +#define GPIO_RTC_MONTH_W 0x88 +#define GPIO_RTC_MONTH_R 0x89 +#define GPIO_RTC_DATE_W 0x86 +#define GPIO_RTC_DATE_R 0x87 +#define GPIO_RTC_HOURS_W 0x84 +#define GPIO_RTC_HOURS_R 0x85 +#define GPIO_RTC_MINUTES_W 0x82 +#define GPIO_RTC_MINUTES_R 0x83 +#define GPIO_RTC_SECONDS_W 0x80 +#define GPIO_RTC_SECONDS_R 0x81 +#define GPIO_RTC_DELAY_TIME 8 + +struct moxart_rtc { + struct rtc_device *rtc; + spinlock_t rtc_lock; + int gpio_data, gpio_sclk, gpio_reset; +}; + +static int day_of_year[12] = { 0, 31, 59, 90, 120, 151, 181, + 212, 243, 273, 304, 334 }; + +static void moxart_rtc_write_byte(struct device *dev, u8 data) +{ + struct moxart_rtc *moxart_rtc = dev_get_drvdata(dev); + int i; + + for (i = 0; i < 8; i++, data >>= 1) { + gpio_set_value(moxart_rtc->gpio_sclk, 0); + gpio_set_value(moxart_rtc->gpio_data, ((data & 1) == 1)); + udelay(GPIO_RTC_DELAY_TIME); + gpio_set_value(moxart_rtc->gpio_sclk, 1); + udelay(GPIO_RTC_DELAY_TIME); + } +} + +static u8 moxart_rtc_read_byte(struct device *dev) +{ + struct moxart_rtc *moxart_rtc = dev_get_drvdata(dev); + int i; + u8 data = 0; + + for (i = 0; i < 8; i++) { + gpio_set_value(moxart_rtc->gpio_sclk, 0); + udelay(GPIO_RTC_DELAY_TIME); + gpio_set_value(moxart_rtc->gpio_sclk, 1); + udelay(GPIO_RTC_DELAY_TIME); + if (gpio_get_value(moxart_rtc->gpio_data)) + data |= (1 << i); + udelay(GPIO_RTC_DELAY_TIME); + } + return data; +} + +static u8 moxart_rtc_read_register(struct device *dev, u8 cmd) +{ + struct moxart_rtc *moxart_rtc = dev_get_drvdata(dev); + u8 data; + unsigned long flags; + + local_irq_save(flags); + + gpio_direction_output(moxart_rtc->gpio_data, 0); + gpio_set_value(moxart_rtc->gpio_reset, 1); + udelay(GPIO_RTC_DELAY_TIME); + moxart_rtc_write_byte(dev, cmd); + gpio_direction_input(moxart_rtc->gpio_data); + udelay(GPIO_RTC_DELAY_TIME); + data = moxart_rtc_read_byte(dev); + gpio_set_value(moxart_rtc->gpio_sclk, 0); + gpio_set_value(moxart_rtc->gpio_reset, 0); + udelay(GPIO_RTC_DELAY_TIME); + + local_irq_restore(flags); + + return data; +} + +static void moxart_rtc_write_register(struct device *dev, u8 cmd, u8 data) +{ + struct moxart_rtc *moxart_rtc = dev_get_drvdata(dev); + unsigned long flags; + + local_irq_save(flags); + + gpio_direction_output(moxart_rtc->gpio_data, 0); + gpio_set_value(moxart_rtc->gpio_reset, 1); + udelay(GPIO_RTC_DELAY_TIME); + moxart_rtc_write_byte(dev, cmd); + moxart_rtc_write_byte(dev, data); + gpio_set_value(moxart_rtc->gpio_sclk, 0); + gpio_set_value(moxart_rtc->gpio_reset, 0); + udelay(GPIO_RTC_DELAY_TIME); + + local_irq_restore(flags); +} + +static int moxart_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct moxart_rtc *moxart_rtc = dev_get_drvdata(dev); + + spin_lock_irq(&moxart_rtc->rtc_lock); + + moxart_rtc_write_register(dev, GPIO_RTC_PROTECT_W, 0); + moxart_rtc_write_register(dev, GPIO_RTC_YEAR_W, + (((tm->tm_year - 100) / 10) << 4) | + ((tm->tm_year - 100) % 10)); + + moxart_rtc_write_register(dev, GPIO_RTC_MONTH_W, + (((tm->tm_mon + 1) / 10) << 4) | + ((tm->tm_mon + 1) % 10)); + + moxart_rtc_write_register(dev, GPIO_RTC_DATE_W, + ((tm->tm_mday / 10) << 4) | + (tm->tm_mday % 10)); + + moxart_rtc_write_register(dev, GPIO_RTC_HOURS_W, + ((tm->tm_hour / 10) << 4) | + (tm->tm_hour % 10)); + + moxart_rtc_write_register(dev, GPIO_RTC_MINUTES_W, + ((tm->tm_min / 10) << 4) | + (tm->tm_min % 10)); + + moxart_rtc_write_register(dev, GPIO_RTC_SECONDS_W, + ((tm->tm_sec / 10) << 4) | + (tm->tm_sec % 10)); + + moxart_rtc_write_register(dev, GPIO_RTC_PROTECT_W, 0x80); + + spin_unlock_irq(&moxart_rtc->rtc_lock); + + dev_dbg(dev, "%s: success tm_year=%d tm_mon=%d\n" + "tm_mday=%d tm_hour=%d tm_min=%d tm_sec=%d\n", + __func__, tm->tm_year, tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + return 0; +} + +static int moxart_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct moxart_rtc *moxart_rtc = dev_get_drvdata(dev); + unsigned char v; + + spin_lock_irq(&moxart_rtc->rtc_lock); + + v = moxart_rtc_read_register(dev, GPIO_RTC_SECONDS_R); + tm->tm_sec = (((v & 0x70) >> 4) * 10) + (v & 0x0F); + + v = moxart_rtc_read_register(dev, GPIO_RTC_MINUTES_R); + tm->tm_min = (((v & 0x70) >> 4) * 10) + (v & 0x0F); + + v = moxart_rtc_read_register(dev, GPIO_RTC_HOURS_R); + if (v & 0x80) { /* 12-hour mode */ + tm->tm_hour = (((v & 0x10) >> 4) * 10) + (v & 0x0F); + if (v & 0x20) { /* PM mode */ + tm->tm_hour += 12; + if (tm->tm_hour >= 24) + tm->tm_hour = 0; + } + } else { /* 24-hour mode */ + tm->tm_hour = (((v & 0x30) >> 4) * 10) + (v & 0x0F); + } + + v = moxart_rtc_read_register(dev, GPIO_RTC_DATE_R); + tm->tm_mday = (((v & 0x30) >> 4) * 10) + (v & 0x0F); + + v = moxart_rtc_read_register(dev, GPIO_RTC_MONTH_R); + tm->tm_mon = (((v & 0x10) >> 4) * 10) + (v & 0x0F); + tm->tm_mon--; + + v = moxart_rtc_read_register(dev, GPIO_RTC_YEAR_R); + tm->tm_year = (((v & 0xF0) >> 4) * 10) + (v & 0x0F); + tm->tm_year += 100; + if (tm->tm_year <= 69) + tm->tm_year += 100; + + v = moxart_rtc_read_register(dev, GPIO_RTC_DAY_R); + tm->tm_wday = (v & 0x0f) - 1; + tm->tm_yday = day_of_year[tm->tm_mon]; + tm->tm_yday += (tm->tm_mday - 1); + if (tm->tm_mon >= 2) { + if (!(tm->tm_year % 4) && (tm->tm_year % 100)) + tm->tm_yday++; + } + + tm->tm_isdst = 0; + + spin_unlock_irq(&moxart_rtc->rtc_lock); + + return 0; +} + +static const struct rtc_class_ops moxart_rtc_ops = { + .read_time = moxart_rtc_read_time, + .set_time = moxart_rtc_set_time, +}; + +static int moxart_rtc_probe(struct platform_device *pdev) +{ + struct moxart_rtc *moxart_rtc; + int ret = 0; + + moxart_rtc = devm_kzalloc(&pdev->dev, sizeof(*moxart_rtc), GFP_KERNEL); + if (!moxart_rtc) + return -ENOMEM; + + moxart_rtc->gpio_data = of_get_named_gpio(pdev->dev.of_node, + "gpio-rtc-data", 0); + if (!gpio_is_valid(moxart_rtc->gpio_data)) { + dev_err(&pdev->dev, "invalid gpio (data): %d\n", + moxart_rtc->gpio_data); + return moxart_rtc->gpio_data; + } + + moxart_rtc->gpio_sclk = of_get_named_gpio(pdev->dev.of_node, + "gpio-rtc-sclk", 0); + if (!gpio_is_valid(moxart_rtc->gpio_sclk)) { + dev_err(&pdev->dev, "invalid gpio (sclk): %d\n", + moxart_rtc->gpio_sclk); + return moxart_rtc->gpio_sclk; + } + + moxart_rtc->gpio_reset = of_get_named_gpio(pdev->dev.of_node, + "gpio-rtc-reset", 0); + if (!gpio_is_valid(moxart_rtc->gpio_reset)) { + dev_err(&pdev->dev, "invalid gpio (reset): %d\n", + moxart_rtc->gpio_reset); + return moxart_rtc->gpio_reset; + } + + spin_lock_init(&moxart_rtc->rtc_lock); + platform_set_drvdata(pdev, moxart_rtc); + + ret = devm_gpio_request(&pdev->dev, moxart_rtc->gpio_data, "rtc_data"); + if (ret) { + dev_err(&pdev->dev, "can't get rtc_data gpio\n"); + return ret; + } + + ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_sclk, + GPIOF_DIR_OUT, "rtc_sclk"); + if (ret) { + dev_err(&pdev->dev, "can't get rtc_sclk gpio\n"); + return ret; + } + + ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_reset, + GPIOF_DIR_OUT, "rtc_reset"); + if (ret) { + dev_err(&pdev->dev, "can't get rtc_reset gpio\n"); + return ret; + } + + moxart_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &moxart_rtc_ops, + THIS_MODULE); + if (IS_ERR(moxart_rtc->rtc)) { + dev_err(&pdev->dev, "devm_rtc_device_register failed\n"); + return PTR_ERR(moxart_rtc->rtc); + } + + return 0; +} + +static const struct of_device_id moxart_rtc_match[] = { + { .compatible = "moxa,moxart-rtc" }, + { }, +}; + +static struct platform_driver moxart_rtc_driver = { + .probe = moxart_rtc_probe, + .driver = { + .name = "moxart-rtc", + .owner = THIS_MODULE, + .of_match_table = moxart_rtc_match, + }, +}; +module_platform_driver(moxart_rtc_driver); + +MODULE_DESCRIPTION("MOXART RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jonas Jensen <jonas.jensen@gmail.com>"); diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c index dfcdf0901d2..dc4f14255cc 100644 --- a/drivers/rtc/rtc-mpc5121.c +++ b/drivers/rtc/rtc-mpc5121.c @@ -3,6 +3,7 @@ * * Copyright 2007, Domen Puncer <domen.puncer@telargo.com> * Copyright 2008, Freescale Semiconductor, Inc. All rights reserved. + * Copyright 2011, Dmitry Eremin-Solenikov * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -12,7 +13,10 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/rtc.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <linux/of_device.h> +#include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/io.h> #include <linux/slab.h> @@ -66,7 +70,7 @@ struct mpc5121_rtc_regs { u32 target_time; /* RTC + 0x20 */ /* * actual_time: - * readonly time since VBAT_RTC was last connected + * readonly time since VBAT_RTC was last connected */ u32 actual_time; /* RTC + 0x24 */ u32 keep_alive; /* RTC + 0x28 */ @@ -145,6 +149,55 @@ static int mpc5121_rtc_set_time(struct device *dev, struct rtc_time *tm) return 0; } +static int mpc5200_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); + struct mpc5121_rtc_regs __iomem *regs = rtc->regs; + int tmp; + + tm->tm_sec = in_8(®s->second); + tm->tm_min = in_8(®s->minute); + + /* 12 hour format? */ + if (in_8(®s->hour) & 0x20) + tm->tm_hour = (in_8(®s->hour) >> 1) + + (in_8(®s->hour) & 1 ? 12 : 0); + else + tm->tm_hour = in_8(®s->hour); + + tmp = in_8(®s->wday_mday); + tm->tm_mday = tmp & 0x1f; + tm->tm_mon = in_8(®s->month) - 1; + tm->tm_year = in_be16(®s->year) - 1900; + tm->tm_wday = (tmp >> 5) % 7; + tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); + tm->tm_isdst = 0; + + return 0; +} + +static int mpc5200_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); + struct mpc5121_rtc_regs __iomem *regs = rtc->regs; + + mpc5121_rtc_update_smh(regs, tm); + + /* date */ + out_8(®s->month_set, tm->tm_mon + 1); + out_8(®s->weekday_set, tm->tm_wday ? tm->tm_wday : 7); + out_8(®s->date_set, tm->tm_mday); + out_be16(®s->year_set, tm->tm_year + 1900); + + /* set date sequence */ + out_8(®s->set_date, 0x1); + out_8(®s->set_date, 0x3); + out_8(®s->set_date, 0x1); + out_8(®s->set_date, 0x0); + + return 0; +} + static int mpc5121_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) { struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); @@ -240,58 +293,43 @@ static int mpc5121_rtc_alarm_irq_enable(struct device *dev, return 0; } -static int mpc5121_rtc_update_irq_enable(struct device *dev, - unsigned int enabled) -{ - struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); - struct mpc5121_rtc_regs __iomem *regs = rtc->regs; - int val; - - val = in_8(®s->int_enable); - - if (enabled) - val = (val & ~0x8) | 0x1; - else - val &= ~0x1; - - out_8(®s->int_enable, val); - - return 0; -} - static const struct rtc_class_ops mpc5121_rtc_ops = { .read_time = mpc5121_rtc_read_time, .set_time = mpc5121_rtc_set_time, .read_alarm = mpc5121_rtc_read_alarm, .set_alarm = mpc5121_rtc_set_alarm, .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable, - .update_irq_enable = mpc5121_rtc_update_irq_enable, }; -static int __devinit mpc5121_rtc_probe(struct platform_device *op, - const struct of_device_id *match) +static const struct rtc_class_ops mpc5200_rtc_ops = { + .read_time = mpc5200_rtc_read_time, + .set_time = mpc5200_rtc_set_time, + .read_alarm = mpc5121_rtc_read_alarm, + .set_alarm = mpc5121_rtc_set_alarm, + .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable, +}; + +static int mpc5121_rtc_probe(struct platform_device *op) { struct mpc5121_rtc_data *rtc; int err = 0; - u32 ka; - rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); + rtc = devm_kzalloc(&op->dev, sizeof(*rtc), GFP_KERNEL); if (!rtc) return -ENOMEM; rtc->regs = of_iomap(op->dev.of_node, 0); if (!rtc->regs) { dev_err(&op->dev, "%s: couldn't map io space\n", __func__); - err = -ENOSYS; - goto out_free; + return -ENOSYS; } device_init_wakeup(&op->dev, 1); - dev_set_drvdata(&op->dev, rtc); + platform_set_drvdata(op, rtc); rtc->irq = irq_of_parse_and_map(op->dev.of_node, 1); - err = request_irq(rtc->irq, mpc5121_rtc_handler, IRQF_DISABLED, + err = request_irq(rtc->irq, mpc5121_rtc_handler, 0, "mpc5121-rtc", &op->dev); if (err) { dev_err(&op->dev, "%s: could not request irq: %i\n", @@ -301,26 +339,34 @@ static int __devinit mpc5121_rtc_probe(struct platform_device *op, rtc->irq_periodic = irq_of_parse_and_map(op->dev.of_node, 0); err = request_irq(rtc->irq_periodic, mpc5121_rtc_handler_upd, - IRQF_DISABLED, "mpc5121-rtc_upd", &op->dev); + 0, "mpc5121-rtc_upd", &op->dev); if (err) { dev_err(&op->dev, "%s: could not request irq: %i\n", __func__, rtc->irq_periodic); goto out_dispose2; } - ka = in_be32(&rtc->regs->keep_alive); - if (ka & 0x02) { - dev_warn(&op->dev, - "mpc5121-rtc: Battery or oscillator failure!\n"); - out_be32(&rtc->regs->keep_alive, ka); + if (of_device_is_compatible(op->dev.of_node, "fsl,mpc5121-rtc")) { + u32 ka; + ka = in_be32(&rtc->regs->keep_alive); + if (ka & 0x02) { + dev_warn(&op->dev, + "mpc5121-rtc: Battery or oscillator failure!\n"); + out_be32(&rtc->regs->keep_alive, ka); + } + + rtc->rtc = devm_rtc_device_register(&op->dev, "mpc5121-rtc", + &mpc5121_rtc_ops, THIS_MODULE); + } else { + rtc->rtc = devm_rtc_device_register(&op->dev, "mpc5200-rtc", + &mpc5200_rtc_ops, THIS_MODULE); } - rtc->rtc = rtc_device_register("mpc5121-rtc", &op->dev, - &mpc5121_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc)) { err = PTR_ERR(rtc->rtc); goto out_free_irq; } + rtc->rtc->uie_unsupported = 1; return 0; @@ -332,59 +378,47 @@ out_dispose2: out_dispose: irq_dispose_mapping(rtc->irq); iounmap(rtc->regs); -out_free: - kfree(rtc); return err; } -static int __devexit mpc5121_rtc_remove(struct platform_device *op) +static int mpc5121_rtc_remove(struct platform_device *op) { - struct mpc5121_rtc_data *rtc = dev_get_drvdata(&op->dev); + struct mpc5121_rtc_data *rtc = platform_get_drvdata(op); struct mpc5121_rtc_regs __iomem *regs = rtc->regs; /* disable interrupt, so there are no nasty surprises */ out_8(®s->alm_enable, 0); out_8(®s->int_enable, in_8(®s->int_enable) & ~0x1); - rtc_device_unregister(rtc->rtc); iounmap(rtc->regs); free_irq(rtc->irq, &op->dev); free_irq(rtc->irq_periodic, &op->dev); irq_dispose_mapping(rtc->irq); irq_dispose_mapping(rtc->irq_periodic); - dev_set_drvdata(&op->dev, NULL); - kfree(rtc); return 0; } -static struct of_device_id mpc5121_rtc_match[] __devinitdata = { +#ifdef CONFIG_OF +static struct of_device_id mpc5121_rtc_match[] = { { .compatible = "fsl,mpc5121-rtc", }, + { .compatible = "fsl,mpc5200-rtc", }, {}, }; +#endif -static struct of_platform_driver mpc5121_rtc_driver = { +static struct platform_driver mpc5121_rtc_driver = { .driver = { .name = "mpc5121-rtc", .owner = THIS_MODULE, - .of_match_table = mpc5121_rtc_match, + .of_match_table = of_match_ptr(mpc5121_rtc_match), }, .probe = mpc5121_rtc_probe, - .remove = __devexit_p(mpc5121_rtc_remove), + .remove = mpc5121_rtc_remove, }; -static int __init mpc5121_rtc_init(void) -{ - return of_register_platform_driver(&mpc5121_rtc_driver); -} -module_init(mpc5121_rtc_init); - -static void __exit mpc5121_rtc_exit(void) -{ - of_unregister_platform_driver(&mpc5121_rtc_driver); -} -module_exit(mpc5121_rtc_exit); +module_platform_driver(mpc5121_rtc_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("John Rigby <jcrigby@gmail.com>"); diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c new file mode 100644 index 00000000000..e2436d14017 --- /dev/null +++ b/drivers/rtc/rtc-mrst.c @@ -0,0 +1,542 @@ +/* + * rtc-mrst.c: Driver for Moorestown virtual RTC + * + * (C) Copyright 2009 Intel Corporation + * Author: Jacob Pan (jacob.jun.pan@intel.com) + * Feng Tang (feng.tang@intel.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; version 2 + * of the License. + * + * Note: + * VRTC is emulated by system controller firmware, the real HW + * RTC is located in the PMIC device. SCU FW shadows PMIC RTC + * in a memory mapped IO space that is visible to the host IA + * processor. + * + * This driver is based upon drivers/rtc/rtc-cmos.c + */ + +/* + * Note: + * * vRTC only supports binary mode and 24H mode + * * vRTC only support PIE and AIE, no UIE, and its PIE only happens + * at 23:59:59pm everyday, no support for adjustable frequency + * * Alarm function is also limited to hr/min/sec. + */ + +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/sfi.h> + +#include <asm-generic/rtc.h> +#include <asm/intel_scu_ipc.h> +#include <asm/intel-mid.h> +#include <asm/intel_mid_vrtc.h> + +struct mrst_rtc { + struct rtc_device *rtc; + struct device *dev; + int irq; + struct resource *iomem; + + u8 enabled_wake; + u8 suspend_ctrl; +}; + +static const char driver_name[] = "rtc_mrst"; + +#define RTC_IRQMASK (RTC_PF | RTC_AF) + +static inline int is_intr(u8 rtc_intr) +{ + if (!(rtc_intr & RTC_IRQF)) + return 0; + return rtc_intr & RTC_IRQMASK; +} + +static inline unsigned char vrtc_is_updating(void) +{ + unsigned char uip; + unsigned long flags; + + spin_lock_irqsave(&rtc_lock, flags); + uip = (vrtc_cmos_read(RTC_FREQ_SELECT) & RTC_UIP); + spin_unlock_irqrestore(&rtc_lock, flags); + return uip; +} + +/* + * rtc_time's year contains the increment over 1900, but vRTC's YEAR + * register can't be programmed to value larger than 0x64, so vRTC + * driver chose to use 1972 (1970 is UNIX time start point) as the base, + * and does the translation at read/write time. + * + * Why not just use 1970 as the offset? it's because using 1972 will + * make it consistent in leap year setting for both vrtc and low-level + * physical rtc devices. Then why not use 1960 as the offset? If we use + * 1960, for a device's first use, its YEAR register is 0 and the system + * year will be parsed as 1960 which is not a valid UNIX time and will + * cause many applications to fail mysteriously. + */ +static int mrst_read_time(struct device *dev, struct rtc_time *time) +{ + unsigned long flags; + + if (vrtc_is_updating()) + mdelay(20); + + spin_lock_irqsave(&rtc_lock, flags); + time->tm_sec = vrtc_cmos_read(RTC_SECONDS); + time->tm_min = vrtc_cmos_read(RTC_MINUTES); + time->tm_hour = vrtc_cmos_read(RTC_HOURS); + time->tm_mday = vrtc_cmos_read(RTC_DAY_OF_MONTH); + time->tm_mon = vrtc_cmos_read(RTC_MONTH); + time->tm_year = vrtc_cmos_read(RTC_YEAR); + spin_unlock_irqrestore(&rtc_lock, flags); + + /* Adjust for the 1972/1900 */ + time->tm_year += 72; + time->tm_mon--; + return rtc_valid_tm(time); +} + +static int mrst_set_time(struct device *dev, struct rtc_time *time) +{ + int ret; + unsigned long flags; + unsigned char mon, day, hrs, min, sec; + unsigned int yrs; + + yrs = time->tm_year; + mon = time->tm_mon + 1; /* tm_mon starts at zero */ + day = time->tm_mday; + hrs = time->tm_hour; + min = time->tm_min; + sec = time->tm_sec; + + if (yrs < 72 || yrs > 138) + return -EINVAL; + yrs -= 72; + + spin_lock_irqsave(&rtc_lock, flags); + + vrtc_cmos_write(yrs, RTC_YEAR); + vrtc_cmos_write(mon, RTC_MONTH); + vrtc_cmos_write(day, RTC_DAY_OF_MONTH); + vrtc_cmos_write(hrs, RTC_HOURS); + vrtc_cmos_write(min, RTC_MINUTES); + vrtc_cmos_write(sec, RTC_SECONDS); + + spin_unlock_irqrestore(&rtc_lock, flags); + + ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETTIME); + return ret; +} + +static int mrst_read_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct mrst_rtc *mrst = dev_get_drvdata(dev); + unsigned char rtc_control; + + if (mrst->irq <= 0) + return -EIO; + + /* Basic alarms only support hour, minute, and seconds fields. + * Some also support day and month, for alarms up to a year in + * the future. + */ + t->time.tm_mday = -1; + t->time.tm_mon = -1; + t->time.tm_year = -1; + + /* vRTC only supports binary mode */ + spin_lock_irq(&rtc_lock); + t->time.tm_sec = vrtc_cmos_read(RTC_SECONDS_ALARM); + t->time.tm_min = vrtc_cmos_read(RTC_MINUTES_ALARM); + t->time.tm_hour = vrtc_cmos_read(RTC_HOURS_ALARM); + + rtc_control = vrtc_cmos_read(RTC_CONTROL); + spin_unlock_irq(&rtc_lock); + + t->enabled = !!(rtc_control & RTC_AIE); + t->pending = 0; + + return 0; +} + +static void mrst_checkintr(struct mrst_rtc *mrst, unsigned char rtc_control) +{ + unsigned char rtc_intr; + + /* + * NOTE after changing RTC_xIE bits we always read INTR_FLAGS; + * allegedly some older rtcs need that to handle irqs properly + */ + rtc_intr = vrtc_cmos_read(RTC_INTR_FLAGS); + rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF; + if (is_intr(rtc_intr)) + rtc_update_irq(mrst->rtc, 1, rtc_intr); +} + +static void mrst_irq_enable(struct mrst_rtc *mrst, unsigned char mask) +{ + unsigned char rtc_control; + + /* + * Flush any pending IRQ status, notably for update irqs, + * before we enable new IRQs + */ + rtc_control = vrtc_cmos_read(RTC_CONTROL); + mrst_checkintr(mrst, rtc_control); + + rtc_control |= mask; + vrtc_cmos_write(rtc_control, RTC_CONTROL); + + mrst_checkintr(mrst, rtc_control); +} + +static void mrst_irq_disable(struct mrst_rtc *mrst, unsigned char mask) +{ + unsigned char rtc_control; + + rtc_control = vrtc_cmos_read(RTC_CONTROL); + rtc_control &= ~mask; + vrtc_cmos_write(rtc_control, RTC_CONTROL); + mrst_checkintr(mrst, rtc_control); +} + +static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct mrst_rtc *mrst = dev_get_drvdata(dev); + unsigned char hrs, min, sec; + int ret = 0; + + if (!mrst->irq) + return -EIO; + + hrs = t->time.tm_hour; + min = t->time.tm_min; + sec = t->time.tm_sec; + + spin_lock_irq(&rtc_lock); + /* Next rtc irq must not be from previous alarm setting */ + mrst_irq_disable(mrst, RTC_AIE); + + /* Update alarm */ + vrtc_cmos_write(hrs, RTC_HOURS_ALARM); + vrtc_cmos_write(min, RTC_MINUTES_ALARM); + vrtc_cmos_write(sec, RTC_SECONDS_ALARM); + + spin_unlock_irq(&rtc_lock); + + ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM); + if (ret) + return ret; + + spin_lock_irq(&rtc_lock); + if (t->enabled) + mrst_irq_enable(mrst, RTC_AIE); + + spin_unlock_irq(&rtc_lock); + + return 0; +} + +/* Currently, the vRTC doesn't support UIE ON/OFF */ +static int mrst_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct mrst_rtc *mrst = dev_get_drvdata(dev); + unsigned long flags; + + spin_lock_irqsave(&rtc_lock, flags); + if (enabled) + mrst_irq_enable(mrst, RTC_AIE); + else + mrst_irq_disable(mrst, RTC_AIE); + spin_unlock_irqrestore(&rtc_lock, flags); + return 0; +} + + +#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE) + +static int mrst_procfs(struct device *dev, struct seq_file *seq) +{ + unsigned char rtc_control, valid; + + spin_lock_irq(&rtc_lock); + rtc_control = vrtc_cmos_read(RTC_CONTROL); + valid = vrtc_cmos_read(RTC_VALID); + spin_unlock_irq(&rtc_lock); + + return seq_printf(seq, + "periodic_IRQ\t: %s\n" + "alarm\t\t: %s\n" + "BCD\t\t: no\n" + "periodic_freq\t: daily (not adjustable)\n", + (rtc_control & RTC_PIE) ? "on" : "off", + (rtc_control & RTC_AIE) ? "on" : "off"); +} + +#else +#define mrst_procfs NULL +#endif + +static const struct rtc_class_ops mrst_rtc_ops = { + .read_time = mrst_read_time, + .set_time = mrst_set_time, + .read_alarm = mrst_read_alarm, + .set_alarm = mrst_set_alarm, + .proc = mrst_procfs, + .alarm_irq_enable = mrst_rtc_alarm_irq_enable, +}; + +static struct mrst_rtc mrst_rtc; + +/* + * When vRTC IRQ is captured by SCU FW, FW will clear the AIE bit in + * Reg B, so no need for this driver to clear it + */ +static irqreturn_t mrst_rtc_irq(int irq, void *p) +{ + u8 irqstat; + + spin_lock(&rtc_lock); + /* This read will clear all IRQ flags inside Reg C */ + irqstat = vrtc_cmos_read(RTC_INTR_FLAGS); + spin_unlock(&rtc_lock); + + irqstat &= RTC_IRQMASK | RTC_IRQF; + if (is_intr(irqstat)) { + rtc_update_irq(p, 1, irqstat); + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +static int vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, + int rtc_irq) +{ + int retval = 0; + unsigned char rtc_control; + + /* There can be only one ... */ + if (mrst_rtc.dev) + return -EBUSY; + + if (!iomem) + return -ENODEV; + + iomem = request_mem_region(iomem->start, resource_size(iomem), + driver_name); + if (!iomem) { + dev_dbg(dev, "i/o mem already in use.\n"); + return -EBUSY; + } + + mrst_rtc.irq = rtc_irq; + mrst_rtc.iomem = iomem; + mrst_rtc.dev = dev; + dev_set_drvdata(dev, &mrst_rtc); + + mrst_rtc.rtc = rtc_device_register(driver_name, dev, + &mrst_rtc_ops, THIS_MODULE); + if (IS_ERR(mrst_rtc.rtc)) { + retval = PTR_ERR(mrst_rtc.rtc); + goto cleanup0; + } + + rename_region(iomem, dev_name(&mrst_rtc.rtc->dev)); + + spin_lock_irq(&rtc_lock); + mrst_irq_disable(&mrst_rtc, RTC_PIE | RTC_AIE); + rtc_control = vrtc_cmos_read(RTC_CONTROL); + spin_unlock_irq(&rtc_lock); + + if (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY))) + dev_dbg(dev, "TODO: support more than 24-hr BCD mode\n"); + + if (rtc_irq) { + retval = request_irq(rtc_irq, mrst_rtc_irq, + 0, dev_name(&mrst_rtc.rtc->dev), + mrst_rtc.rtc); + if (retval < 0) { + dev_dbg(dev, "IRQ %d is already in use, err %d\n", + rtc_irq, retval); + goto cleanup1; + } + } + dev_dbg(dev, "initialised\n"); + return 0; + +cleanup1: + rtc_device_unregister(mrst_rtc.rtc); +cleanup0: + mrst_rtc.dev = NULL; + release_mem_region(iomem->start, resource_size(iomem)); + dev_err(dev, "rtc-mrst: unable to initialise\n"); + return retval; +} + +static void rtc_mrst_do_shutdown(void) +{ + spin_lock_irq(&rtc_lock); + mrst_irq_disable(&mrst_rtc, RTC_IRQMASK); + spin_unlock_irq(&rtc_lock); +} + +static void rtc_mrst_do_remove(struct device *dev) +{ + struct mrst_rtc *mrst = dev_get_drvdata(dev); + struct resource *iomem; + + rtc_mrst_do_shutdown(); + + if (mrst->irq) + free_irq(mrst->irq, mrst->rtc); + + rtc_device_unregister(mrst->rtc); + mrst->rtc = NULL; + + iomem = mrst->iomem; + release_mem_region(iomem->start, resource_size(iomem)); + mrst->iomem = NULL; + + mrst->dev = NULL; +} + +#ifdef CONFIG_PM +static int mrst_suspend(struct device *dev, pm_message_t mesg) +{ + struct mrst_rtc *mrst = dev_get_drvdata(dev); + unsigned char tmp; + + /* Only the alarm might be a wakeup event source */ + spin_lock_irq(&rtc_lock); + mrst->suspend_ctrl = tmp = vrtc_cmos_read(RTC_CONTROL); + if (tmp & (RTC_PIE | RTC_AIE)) { + unsigned char mask; + + if (device_may_wakeup(dev)) + mask = RTC_IRQMASK & ~RTC_AIE; + else + mask = RTC_IRQMASK; + tmp &= ~mask; + vrtc_cmos_write(tmp, RTC_CONTROL); + + mrst_checkintr(mrst, tmp); + } + spin_unlock_irq(&rtc_lock); + + if (tmp & RTC_AIE) { + mrst->enabled_wake = 1; + enable_irq_wake(mrst->irq); + } + + dev_dbg(&mrst_rtc.rtc->dev, "suspend%s, ctrl %02x\n", + (tmp & RTC_AIE) ? ", alarm may wake" : "", + tmp); + + return 0; +} + +/* + * We want RTC alarms to wake us from the deep power saving state + */ +static inline int mrst_poweroff(struct device *dev) +{ + return mrst_suspend(dev, PMSG_HIBERNATE); +} + +static int mrst_resume(struct device *dev) +{ + struct mrst_rtc *mrst = dev_get_drvdata(dev); + unsigned char tmp = mrst->suspend_ctrl; + + /* Re-enable any irqs previously active */ + if (tmp & RTC_IRQMASK) { + unsigned char mask; + + if (mrst->enabled_wake) { + disable_irq_wake(mrst->irq); + mrst->enabled_wake = 0; + } + + spin_lock_irq(&rtc_lock); + do { + vrtc_cmos_write(tmp, RTC_CONTROL); + + mask = vrtc_cmos_read(RTC_INTR_FLAGS); + mask &= (tmp & RTC_IRQMASK) | RTC_IRQF; + if (!is_intr(mask)) + break; + + rtc_update_irq(mrst->rtc, 1, mask); + tmp &= ~RTC_AIE; + } while (mask & RTC_AIE); + spin_unlock_irq(&rtc_lock); + } + + dev_dbg(&mrst_rtc.rtc->dev, "resume, ctrl %02x\n", tmp); + + return 0; +} + +#else +#define mrst_suspend NULL +#define mrst_resume NULL + +static inline int mrst_poweroff(struct device *dev) +{ + return -ENOSYS; +} + +#endif + +static int vrtc_mrst_platform_probe(struct platform_device *pdev) +{ + return vrtc_mrst_do_probe(&pdev->dev, + platform_get_resource(pdev, IORESOURCE_MEM, 0), + platform_get_irq(pdev, 0)); +} + +static int vrtc_mrst_platform_remove(struct platform_device *pdev) +{ + rtc_mrst_do_remove(&pdev->dev); + return 0; +} + +static void vrtc_mrst_platform_shutdown(struct platform_device *pdev) +{ + if (system_state == SYSTEM_POWER_OFF && !mrst_poweroff(&pdev->dev)) + return; + + rtc_mrst_do_shutdown(); +} + +MODULE_ALIAS("platform:vrtc_mrst"); + +static struct platform_driver vrtc_mrst_platform_driver = { + .probe = vrtc_mrst_platform_probe, + .remove = vrtc_mrst_platform_remove, + .shutdown = vrtc_mrst_platform_shutdown, + .driver = { + .name = (char *) driver_name, + .suspend = mrst_suspend, + .resume = mrst_resume, + } +}; + +module_platform_driver(vrtc_mrst_platform_driver); + +MODULE_AUTHOR("Jacob Pan; Feng Tang"); +MODULE_DESCRIPTION("Driver for Moorestown virtual RTC"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-msm6242.c b/drivers/rtc/rtc-msm6242.c index b2fff0ca49f..426cb5189da 100644 --- a/drivers/rtc/rtc-msm6242.c +++ b/drivers/rtc/rtc-msm6242.c @@ -82,7 +82,7 @@ static inline unsigned int msm6242_read(struct msm6242_priv *priv, static inline void msm6242_write(struct msm6242_priv *priv, unsigned int val, unsigned int reg) { - return __raw_writel(val, &priv->regs[reg]); + __raw_writel(val, &priv->regs[reg]); } static inline void msm6242_set(struct msm6242_priv *priv, unsigned int val, @@ -111,8 +111,8 @@ static void msm6242_lock(struct msm6242_priv *priv) } if (!cnt) - pr_warning("msm6242: timed out waiting for RTC (0x%x)\n", - msm6242_read(priv, MSM6242_CD)); + pr_warn("msm6242: timed out waiting for RTC (0x%x)\n", + msm6242_read(priv, MSM6242_CD)); } static void msm6242_unlock(struct msm6242_priv *priv) @@ -194,52 +194,31 @@ static const struct rtc_class_ops msm6242_rtc_ops = { .set_time = msm6242_set_time, }; -static int __init msm6242_rtc_probe(struct platform_device *dev) +static int __init msm6242_rtc_probe(struct platform_device *pdev) { struct resource *res; struct msm6242_priv *priv; struct rtc_device *rtc; - int error; - res = platform_get_resource(dev, IORESOURCE_MEM, 0); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; - priv = kzalloc(sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->regs = ioremap(res->start, resource_size(res)); - if (!priv->regs) { - error = -ENOMEM; - goto out_free_priv; - } + priv->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!priv->regs) + return -ENOMEM; + platform_set_drvdata(pdev, priv); - rtc = rtc_device_register("rtc-msm6242", &dev->dev, &msm6242_rtc_ops, - THIS_MODULE); - if (IS_ERR(rtc)) { - error = PTR_ERR(rtc); - goto out_unmap; - } + rtc = devm_rtc_device_register(&pdev->dev, "rtc-msm6242", + &msm6242_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); priv->rtc = rtc; - platform_set_drvdata(dev, priv); - return 0; - -out_unmap: - iounmap(priv->regs); -out_free_priv: - kfree(priv); - return error; -} - -static int __exit msm6242_rtc_remove(struct platform_device *dev) -{ - struct msm6242_priv *priv = platform_get_drvdata(dev); - - rtc_device_unregister(priv->rtc); - iounmap(priv->regs); - kfree(priv); return 0; } @@ -248,21 +227,9 @@ static struct platform_driver msm6242_rtc_driver = { .name = "rtc-msm6242", .owner = THIS_MODULE, }, - .remove = __exit_p(msm6242_rtc_remove), }; -static int __init msm6242_rtc_init(void) -{ - return platform_driver_probe(&msm6242_rtc_driver, msm6242_rtc_probe); -} - -static void __exit msm6242_rtc_fini(void) -{ - platform_driver_unregister(&msm6242_rtc_driver); -} - -module_init(msm6242_rtc_init); -module_exit(msm6242_rtc_fini); +module_platform_driver_probe(msm6242_rtc_driver, msm6242_rtc_probe); MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index bcca4729855..6aaec2fc7c0 100644 --- a/drivers/rtc/rtc-mv.c +++ b/drivers/rtc/rtc-mv.c @@ -12,8 +12,11 @@ #include <linux/bcd.h> #include <linux/io.h> #include <linux/platform_device.h> +#include <linux/of.h> #include <linux/delay.h> +#include <linux/clk.h> #include <linux/gfp.h> +#include <linux/module.h> #define RTC_TIME_REG_OFFS 0 @@ -39,6 +42,7 @@ struct rtc_plat_data { struct rtc_device *rtc; void __iomem *ioaddr; int irq; + struct clk *clk; }; static int mv_rtc_set_time(struct device *dev, struct rtc_time *tm) @@ -169,25 +173,19 @@ static int mv_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) return 0; } -static int mv_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int mv_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; if (pdata->irq < 0) - return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */ - switch (cmd) { - case RTC_AIE_OFF: - writel(0, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS); - break; - case RTC_AIE_ON: + return -EINVAL; /* fall back into rtc-dev's emulation */ + + if (enabled) writel(1, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS); - break; - default: - return -ENOIOCTLCMD; - } + else + writel(0, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS); return 0; } @@ -216,38 +214,37 @@ static const struct rtc_class_ops mv_rtc_alarm_ops = { .set_time = mv_rtc_set_time, .read_alarm = mv_rtc_read_alarm, .set_alarm = mv_rtc_set_alarm, - .ioctl = mv_rtc_ioctl, + .alarm_irq_enable = mv_rtc_alarm_irq_enable, }; -static int __devinit mv_rtc_probe(struct platform_device *pdev) +static int __init mv_rtc_probe(struct platform_device *pdev) { struct resource *res; struct rtc_plat_data *pdata; - resource_size_t size; u32 rtc_time; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; + u32 rtc_date; + int ret = 0; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - size = resource_size(res); - if (!devm_request_mem_region(&pdev->dev, res->start, size, - pdev->name)) - return -EBUSY; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pdata->ioaddr)) + return PTR_ERR(pdata->ioaddr); - pdata->ioaddr = devm_ioremap(&pdev->dev, res->start, size); - if (!pdata->ioaddr) - return -ENOMEM; + pdata->clk = devm_clk_get(&pdev->dev, NULL); + /* Not all SoCs require a clock.*/ + if (!IS_ERR(pdata->clk)) + clk_prepare_enable(pdata->clk); /* make sure the 24 hours mode is enabled */ rtc_time = readl(pdata->ioaddr + RTC_TIME_REG_OFFS); if (rtc_time & RTC_HOURS_12H_MODE) { dev_err(&pdev->dev, "24 Hours mode not supported.\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } /* make sure it is actually functional */ @@ -256,29 +253,44 @@ static int __devinit mv_rtc_probe(struct platform_device *pdev) rtc_time = readl(pdata->ioaddr + RTC_TIME_REG_OFFS); if (rtc_time == 0x01000000) { dev_err(&pdev->dev, "internal RTC not ticking\n"); - return -ENODEV; + ret = -ENODEV; + goto out; } } + /* + * A date after January 19th, 2038 does not fit on 32 bits and + * will confuse the kernel and userspace. Reset to a sane date + * (January 1st, 2013) if we're after 2038. + */ + rtc_date = readl(pdata->ioaddr + RTC_DATE_REG_OFFS); + if (bcd2bin((rtc_date >> RTC_YEAR_OFFS) & 0xff) >= 38) { + dev_info(&pdev->dev, "invalid RTC date, resetting to January 1st, 2013\n"); + writel(0x130101, pdata->ioaddr + RTC_DATE_REG_OFFS); + } + pdata->irq = platform_get_irq(pdev, 0); platform_set_drvdata(pdev, pdata); if (pdata->irq >= 0) { device_init_wakeup(&pdev->dev, 1); - pdata->rtc = rtc_device_register(pdev->name, &pdev->dev, + pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &mv_rtc_alarm_ops, THIS_MODULE); - } else - pdata->rtc = rtc_device_register(pdev->name, &pdev->dev, + } else { + pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &mv_rtc_ops, THIS_MODULE); - if (IS_ERR(pdata->rtc)) - return PTR_ERR(pdata->rtc); + } + if (IS_ERR(pdata->rtc)) { + ret = PTR_ERR(pdata->rtc); + goto out; + } if (pdata->irq >= 0) { writel(0, pdata->ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS); if (devm_request_irq(&pdev->dev, pdata->irq, mv_rtc_interrupt, - IRQF_DISABLED | IRQF_SHARED, + IRQF_SHARED, pdev->name, pdata) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = -1; @@ -286,6 +298,11 @@ static int __devinit mv_rtc_probe(struct platform_device *pdev) } return 0; +out: + if (!IS_ERR(pdata->clk)) + clk_disable_unprepare(pdata->clk); + + return ret; } static int __exit mv_rtc_remove(struct platform_device *pdev) @@ -295,30 +312,29 @@ static int __exit mv_rtc_remove(struct platform_device *pdev) if (pdata->irq >= 0) device_init_wakeup(&pdev->dev, 0); - rtc_device_unregister(pdata->rtc); + if (!IS_ERR(pdata->clk)) + clk_disable_unprepare(pdata->clk); + return 0; } +#ifdef CONFIG_OF +static const struct of_device_id rtc_mv_of_match_table[] = { + { .compatible = "marvell,orion-rtc", }, + {} +}; +#endif + static struct platform_driver mv_rtc_driver = { .remove = __exit_p(mv_rtc_remove), .driver = { .name = "rtc-mv", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(rtc_mv_of_match_table), }, }; -static __init int mv_init(void) -{ - return platform_driver_probe(&mv_rtc_driver, mv_rtc_probe); -} - -static __exit void mv_exit(void) -{ - platform_driver_unregister(&mv_rtc_driver); -} - -module_init(mv_init); -module_exit(mv_exit); +module_platform_driver_probe(mv_rtc_driver, mv_rtc_probe); MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>"); MODULE_DESCRIPTION("Marvell RTC driver"); diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c index 0b06c1e03fd..419874fefa4 100644 --- a/drivers/rtc/rtc-mxc.c +++ b/drivers/rtc/rtc-mxc.c @@ -17,8 +17,6 @@ #include <linux/platform_device.h> #include <linux/clk.h> -#include <mach/hardware.h> - #define RTC_INPUT_CLK_32768HZ (0x00 << 5) #define RTC_INPUT_CLK_32000HZ (0x01 << 5) #define RTC_INPUT_CLK_38400HZ (0x02 << 5) @@ -55,12 +53,6 @@ static const u32 PIE_BIT_DEF[MAX_PIE_NUM][2] = { { MAX_PIE_FREQ, RTC_SAM7_BIT }, }; -/* Those are the bits from a classic RTC we want to mimic */ -#define RTC_IRQF 0x80 /* any of the following 3 is active */ -#define RTC_PF 0x40 /* Periodic interrupt */ -#define RTC_AF 0x20 /* Alarm interrupt */ -#define RTC_UF 0x10 /* Update interrupt for 1Hz RTC */ - #define MXC_RTC_TIME 0 #define MXC_RTC_ALARM 1 @@ -78,14 +70,38 @@ static const u32 PIE_BIT_DEF[MAX_PIE_NUM][2] = { #define RTC_TEST2 0x2C /* 32bit rtc test reg 2 */ #define RTC_TEST3 0x30 /* 32bit rtc test reg 3 */ +enum imx_rtc_type { + IMX1_RTC, + IMX21_RTC, +}; + struct rtc_plat_data { struct rtc_device *rtc; void __iomem *ioaddr; int irq; struct clk *clk; struct rtc_time g_rtc_alarm; + enum imx_rtc_type devtype; }; +static struct platform_device_id imx_rtc_devtype[] = { + { + .name = "imx1-rtc", + .driver_data = IMX1_RTC, + }, { + .name = "imx21-rtc", + .driver_data = IMX21_RTC, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(platform, imx_rtc_devtype); + +static inline int is_imx1_rtc(struct rtc_plat_data *data) +{ + return data->devtype == IMX1_RTC; +} + /* * This function is used to obtain the RTC time or the alarm value in * second. @@ -161,7 +177,6 @@ static int rtc_update_alarm(struct device *dev, struct rtc_time *alrm) { struct rtc_time alarm_tm, now_tm; unsigned long now, time; - int ret; struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; @@ -174,21 +189,33 @@ static int rtc_update_alarm(struct device *dev, struct rtc_time *alrm) alarm_tm.tm_hour = alrm->tm_hour; alarm_tm.tm_min = alrm->tm_min; alarm_tm.tm_sec = alrm->tm_sec; - rtc_tm_to_time(&now_tm, &now); rtc_tm_to_time(&alarm_tm, &time); - if (time < now) { - time += 60 * 60 * 24; - rtc_time_to_tm(time, &alarm_tm); - } - - ret = rtc_tm_to_time(&alarm_tm, &time); - /* clear all the interrupt status bits */ writew(readw(ioaddr + RTC_RTCISR), ioaddr + RTC_RTCISR); set_alarm_or_time(dev, MXC_RTC_ALARM, time); - return ret; + return 0; +} + +static void mxc_rtc_irq_enable(struct device *dev, unsigned int bit, + unsigned int enabled) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + u32 reg; + + spin_lock_irq(&pdata->rtc->irq_lock); + reg = readw(ioaddr + RTC_RTCIENR); + + if (enabled) + reg |= bit; + else + reg &= ~bit; + + writew(reg, ioaddr + RTC_RTCIENR); + spin_unlock_irq(&pdata->rtc->irq_lock); } /* This function is the RTC interrupt service routine. */ @@ -197,21 +224,21 @@ static irqreturn_t mxc_rtc_interrupt(int irq, void *dev_id) struct platform_device *pdev = dev_id; struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; + unsigned long flags; u32 status; u32 events = 0; - spin_lock_irq(&pdata->rtc->irq_lock); + spin_lock_irqsave(&pdata->rtc->irq_lock, flags); status = readw(ioaddr + RTC_RTCISR) & readw(ioaddr + RTC_RTCIENR); /* clear interrupt sources */ writew(status, ioaddr + RTC_RTCISR); - /* clear alarm interrupt if it has occurred */ - if (status & RTC_ALM_BIT) - status &= ~RTC_ALM_BIT; - /* update irq data & counter */ - if (status & RTC_ALM_BIT) + if (status & RTC_ALM_BIT) { events |= (RTC_AF | RTC_IRQF); + /* RTC alarm should be one-shot */ + mxc_rtc_irq_enable(&pdev->dev, RTC_ALM_BIT, 0); + } if (status & RTC_1HZ_BIT) events |= (RTC_UF | RTC_IRQF); @@ -219,11 +246,8 @@ static irqreturn_t mxc_rtc_interrupt(int irq, void *dev_id) if (status & PIT_ALL_ON) events |= (RTC_PF | RTC_IRQF); - if ((status & RTC_ALM_BIT) && rtc_valid_tm(&pdata->g_rtc_alarm)) - rtc_update_alarm(&pdev->dev, &pdata->g_rtc_alarm); - rtc_update_irq(pdata->rtc, 1, events); - spin_unlock_irq(&pdata->rtc->irq_lock); + spin_unlock_irqrestore(&pdata->rtc->irq_lock, flags); return IRQ_HANDLED; } @@ -248,38 +272,12 @@ static void mxc_rtc_release(struct device *dev) spin_unlock_irq(&pdata->rtc->irq_lock); } -static void mxc_rtc_irq_enable(struct device *dev, unsigned int bit, - unsigned int enabled) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_plat_data *pdata = platform_get_drvdata(pdev); - void __iomem *ioaddr = pdata->ioaddr; - u32 reg; - - spin_lock_irq(&pdata->rtc->irq_lock); - reg = readw(ioaddr + RTC_RTCIENR); - - if (enabled) - reg |= bit; - else - reg &= ~bit; - - writew(reg, ioaddr + RTC_RTCIENR); - spin_unlock_irq(&pdata->rtc->irq_lock); -} - static int mxc_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { mxc_rtc_irq_enable(dev, RTC_ALM_BIT, enabled); return 0; } -static int mxc_rtc_update_irq_enable(struct device *dev, unsigned int enabled) -{ - mxc_rtc_irq_enable(dev, RTC_1HZ_BIT, enabled); - return 0; -} - /* * This function reads the current RTC time into tm in Gregorian date. */ @@ -302,6 +300,20 @@ static int mxc_rtc_read_time(struct device *dev, struct rtc_time *tm) */ static int mxc_rtc_set_mmss(struct device *dev, unsigned long time) { + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + /* + * TTC_DAYR register is 9-bit in MX1 SoC, save time and day of year only + */ + if (is_imx1_rtc(pdata)) { + struct rtc_time tm; + + rtc_time_to_tm(time, &tm); + tm.tm_year = 70; + rtc_tm_to_time(&tm, &time); + } + /* Avoid roll-over from reading the different registers */ do { set_alarm_or_time(dev, MXC_RTC_TIME, time); @@ -336,21 +348,7 @@ static int mxc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) struct rtc_plat_data *pdata = platform_get_drvdata(pdev); int ret; - if (rtc_valid_tm(&alrm->time)) { - if (alrm->time.tm_sec > 59 || - alrm->time.tm_hour > 23 || - alrm->time.tm_min > 59) - return -EINVAL; - - ret = rtc_update_alarm(dev, &alrm->time); - } else { - ret = rtc_valid_tm(&alrm->time); - if (ret) - return ret; - - ret = rtc_update_alarm(dev, &alrm->time); - } - + ret = rtc_update_alarm(dev, &alrm->time); if (ret) return ret; @@ -368,10 +366,9 @@ static struct rtc_class_ops mxc_rtc_ops = { .read_alarm = mxc_rtc_read_alarm, .set_alarm = mxc_rtc_set_alarm, .alarm_irq_enable = mxc_rtc_alarm_irq_enable, - .update_irq_enable = mxc_rtc_update_irq_enable, }; -static int __init mxc_rtc_probe(struct platform_device *pdev) +static int mxc_rtc_probe(struct platform_device *pdev) { struct resource *res; struct rtc_device *rtc; @@ -380,29 +377,27 @@ static int __init mxc_rtc_probe(struct platform_device *pdev) unsigned long rate; int ret; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - if (!devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), pdev->name)) - return -EBUSY; + pdata->devtype = pdev->id_entry->driver_data; - pdata->ioaddr = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pdata->ioaddr)) + return PTR_ERR(pdata->ioaddr); - pdata->clk = clk_get(&pdev->dev, "rtc"); + pdata->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(pdata->clk)) { dev_err(&pdev->dev, "unable to get clock!\n"); - ret = PTR_ERR(pdata->clk); - goto exit_free_pdata; + return PTR_ERR(pdata->clk); } - clk_enable(pdata->clk); + ret = clk_prepare_enable(pdata->clk); + if (ret) + return ret; + rate = clk_get_rate(pdata->clk); if (rate == 32768) @@ -425,14 +420,6 @@ static int __init mxc_rtc_probe(struct platform_device *pdev) goto exit_put_clk; } - rtc = rtc_device_register(pdev->name, &pdev->dev, &mxc_rtc_ops, - THIS_MODULE); - if (IS_ERR(rtc)) { - ret = PTR_ERR(rtc); - goto exit_put_clk; - } - - pdata->rtc = rtc; platform_set_drvdata(pdev, pdata); /* Configure and enable the RTC */ @@ -445,50 +432,71 @@ static int __init mxc_rtc_probe(struct platform_device *pdev) pdata->irq = -1; } + if (pdata->irq >= 0) + device_init_wakeup(&pdev->dev, 1); + + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &mxc_rtc_ops, + THIS_MODULE); + if (IS_ERR(rtc)) { + ret = PTR_ERR(rtc); + goto exit_put_clk; + } + + pdata->rtc = rtc; + return 0; exit_put_clk: - clk_disable(pdata->clk); - clk_put(pdata->clk); - -exit_free_pdata: + clk_disable_unprepare(pdata->clk); return ret; } -static int __exit mxc_rtc_remove(struct platform_device *pdev) +static int mxc_rtc_remove(struct platform_device *pdev) { struct rtc_plat_data *pdata = platform_get_drvdata(pdev); - rtc_device_unregister(pdata->rtc); + clk_disable_unprepare(pdata->clk); - clk_disable(pdata->clk); - clk_put(pdata->clk); - platform_set_drvdata(pdev, NULL); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int mxc_rtc_suspend(struct device *dev) +{ + struct rtc_plat_data *pdata = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(pdata->irq); + + return 0; +} + +static int mxc_rtc_resume(struct device *dev) +{ + struct rtc_plat_data *pdata = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(pdata->irq); return 0; } +#endif + +static SIMPLE_DEV_PM_OPS(mxc_rtc_pm_ops, mxc_rtc_suspend, mxc_rtc_resume); static struct platform_driver mxc_rtc_driver = { .driver = { .name = "mxc_rtc", + .pm = &mxc_rtc_pm_ops, .owner = THIS_MODULE, }, - .remove = __exit_p(mxc_rtc_remove), + .id_table = imx_rtc_devtype, + .probe = mxc_rtc_probe, + .remove = mxc_rtc_remove, }; -static int __init mxc_rtc_init(void) -{ - return platform_driver_probe(&mxc_rtc_driver, mxc_rtc_probe); -} - -static void __exit mxc_rtc_exit(void) -{ - platform_driver_unregister(&mxc_rtc_driver); -} - -module_init(mxc_rtc_init); -module_exit(mxc_rtc_exit); +module_platform_driver(mxc_rtc_driver) MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); MODULE_DESCRIPTION("RTC driver for Freescale MXC"); diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c index ddb0857e15a..a53da0958e9 100644 --- a/drivers/rtc/rtc-nuc900.c +++ b/drivers/rtc/rtc-nuc900.c @@ -99,7 +99,7 @@ static int *check_rtc_access_enable(struct nuc900_rtc *nuc900_rtc) if (!timeout) return ERR_PTR(-EPERM); - return 0; + return NULL; } static int nuc900_rtc_bcd2bin(unsigned int timereg, @@ -134,20 +134,6 @@ static void nuc900_rtc_bin2bcd(struct device *dev, struct rtc_time *settm, gettm->bcd_hour = bin2bcd(settm->tm_hour) << 16; } -static int nuc900_update_irq_enable(struct device *dev, unsigned int enabled) -{ - struct nuc900_rtc *rtc = dev_get_drvdata(dev); - - if (enabled) - __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)| - (TICKINTENB), rtc->rtc_reg + REG_RTC_RIER); - else - __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)& - (~TICKINTENB), rtc->rtc_reg + REG_RTC_RIER); - - return 0; -} - static int nuc900_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct nuc900_rtc *rtc = dev_get_drvdata(dev); @@ -234,110 +220,53 @@ static struct rtc_class_ops nuc900_rtc_ops = { .read_alarm = nuc900_rtc_read_alarm, .set_alarm = nuc900_rtc_set_alarm, .alarm_irq_enable = nuc900_alarm_irq_enable, - .update_irq_enable = nuc900_update_irq_enable, }; -static int __devinit nuc900_rtc_probe(struct platform_device *pdev) +static int __init nuc900_rtc_probe(struct platform_device *pdev) { struct resource *res; struct nuc900_rtc *nuc900_rtc; - int err = 0; - nuc900_rtc = kzalloc(sizeof(struct nuc900_rtc), GFP_KERNEL); - if (!nuc900_rtc) { - dev_err(&pdev->dev, "kzalloc nuc900_rtc failed\n"); + nuc900_rtc = devm_kzalloc(&pdev->dev, sizeof(struct nuc900_rtc), + GFP_KERNEL); + if (!nuc900_rtc) return -ENOMEM; - } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "platform_get_resource failed\n"); - err = -ENXIO; - goto fail1; - } - if (!request_mem_region(res->start, resource_size(res), - pdev->name)) { - dev_err(&pdev->dev, "request_mem_region failed\n"); - err = -EBUSY; - goto fail1; - } - - nuc900_rtc->rtc_reg = ioremap(res->start, resource_size(res)); - if (!nuc900_rtc->rtc_reg) { - dev_err(&pdev->dev, "ioremap rtc_reg failed\n"); - err = -ENOMEM; - goto fail2; - } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + nuc900_rtc->rtc_reg = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(nuc900_rtc->rtc_reg)) + return PTR_ERR(nuc900_rtc->rtc_reg); platform_set_drvdata(pdev, nuc900_rtc); - nuc900_rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev, + nuc900_rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name, &nuc900_rtc_ops, THIS_MODULE); if (IS_ERR(nuc900_rtc->rtcdev)) { dev_err(&pdev->dev, "rtc device register failed\n"); - err = PTR_ERR(nuc900_rtc->rtcdev); - goto fail3; + return PTR_ERR(nuc900_rtc->rtcdev); } __raw_writel(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_TSSR) | MODE24, nuc900_rtc->rtc_reg + REG_RTC_TSSR); nuc900_rtc->irq_num = platform_get_irq(pdev, 0); - if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt, - IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) { + if (devm_request_irq(&pdev->dev, nuc900_rtc->irq_num, + nuc900_rtc_interrupt, 0, "nuc900rtc", nuc900_rtc)) { dev_err(&pdev->dev, "NUC900 RTC request irq failed\n"); - err = -EBUSY; - goto fail4; + return -EBUSY; } return 0; - -fail4: rtc_device_unregister(nuc900_rtc->rtcdev); -fail3: iounmap(nuc900_rtc->rtc_reg); -fail2: release_mem_region(res->start, resource_size(res)); -fail1: kfree(nuc900_rtc); - return err; -} - -static int __devexit nuc900_rtc_remove(struct platform_device *pdev) -{ - struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev); - struct resource *res; - - free_irq(nuc900_rtc->irq_num, nuc900_rtc); - rtc_device_unregister(nuc900_rtc->rtcdev); - iounmap(nuc900_rtc->rtc_reg); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, resource_size(res)); - - kfree(nuc900_rtc); - - platform_set_drvdata(pdev, NULL); - - return 0; } static struct platform_driver nuc900_rtc_driver = { - .remove = __devexit_p(nuc900_rtc_remove), .driver = { .name = "nuc900-rtc", .owner = THIS_MODULE, }, }; -static int __init nuc900_rtc_init(void) -{ - return platform_driver_probe(&nuc900_rtc_driver, nuc900_rtc_probe); -} - -static void __exit nuc900_rtc_exit(void) -{ - platform_driver_unregister(&nuc900_rtc_driver); -} - -module_init(nuc900_rtc_init); -module_exit(nuc900_rtc_exit); +module_platform_driver_probe(nuc900_rtc_driver, nuc900_rtc_probe); MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>"); MODULE_DESCRIPTION("nuc910/nuc920 RTC driver"); diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c index 73377b0d65d..21142e6574a 100644 --- a/drivers/rtc/rtc-omap.c +++ b/drivers/rtc/rtc-omap.c @@ -20,9 +20,10 @@ #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/platform_device.h> - -#include <asm/io.h> - +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/pm_runtime.h> +#include <linux/io.h> /* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock * with century-range alarm matching, driven by the 32kHz clock. @@ -38,6 +39,8 @@ * the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment. */ +#define DRIVER_NAME "omap_rtc" + #define OMAP_RTC_BASE 0xfffb4800 /* RTC registers */ @@ -64,34 +67,65 @@ #define OMAP_RTC_COMP_MSB_REG 0x50 #define OMAP_RTC_OSC_REG 0x54 +#define OMAP_RTC_KICK0_REG 0x6c +#define OMAP_RTC_KICK1_REG 0x70 + +#define OMAP_RTC_IRQWAKEEN 0x7c + /* OMAP_RTC_CTRL_REG bit fields: */ -#define OMAP_RTC_CTRL_SPLIT (1<<7) -#define OMAP_RTC_CTRL_DISABLE (1<<6) -#define OMAP_RTC_CTRL_SET_32_COUNTER (1<<5) -#define OMAP_RTC_CTRL_TEST (1<<4) -#define OMAP_RTC_CTRL_MODE_12_24 (1<<3) -#define OMAP_RTC_CTRL_AUTO_COMP (1<<2) -#define OMAP_RTC_CTRL_ROUND_30S (1<<1) -#define OMAP_RTC_CTRL_STOP (1<<0) +#define OMAP_RTC_CTRL_SPLIT BIT(7) +#define OMAP_RTC_CTRL_DISABLE BIT(6) +#define OMAP_RTC_CTRL_SET_32_COUNTER BIT(5) +#define OMAP_RTC_CTRL_TEST BIT(4) +#define OMAP_RTC_CTRL_MODE_12_24 BIT(3) +#define OMAP_RTC_CTRL_AUTO_COMP BIT(2) +#define OMAP_RTC_CTRL_ROUND_30S BIT(1) +#define OMAP_RTC_CTRL_STOP BIT(0) /* OMAP_RTC_STATUS_REG bit fields: */ -#define OMAP_RTC_STATUS_POWER_UP (1<<7) -#define OMAP_RTC_STATUS_ALARM (1<<6) -#define OMAP_RTC_STATUS_1D_EVENT (1<<5) -#define OMAP_RTC_STATUS_1H_EVENT (1<<4) -#define OMAP_RTC_STATUS_1M_EVENT (1<<3) -#define OMAP_RTC_STATUS_1S_EVENT (1<<2) -#define OMAP_RTC_STATUS_RUN (1<<1) -#define OMAP_RTC_STATUS_BUSY (1<<0) +#define OMAP_RTC_STATUS_POWER_UP BIT(7) +#define OMAP_RTC_STATUS_ALARM BIT(6) +#define OMAP_RTC_STATUS_1D_EVENT BIT(5) +#define OMAP_RTC_STATUS_1H_EVENT BIT(4) +#define OMAP_RTC_STATUS_1M_EVENT BIT(3) +#define OMAP_RTC_STATUS_1S_EVENT BIT(2) +#define OMAP_RTC_STATUS_RUN BIT(1) +#define OMAP_RTC_STATUS_BUSY BIT(0) /* OMAP_RTC_INTERRUPTS_REG bit fields: */ -#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3) -#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2) +#define OMAP_RTC_INTERRUPTS_IT_ALARM BIT(3) +#define OMAP_RTC_INTERRUPTS_IT_TIMER BIT(2) + +/* OMAP_RTC_OSC_REG bit fields: */ +#define OMAP_RTC_OSC_32KCLK_EN BIT(6) + +/* OMAP_RTC_IRQWAKEEN bit fields: */ +#define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1) + +/* OMAP_RTC_KICKER values */ +#define KICK0_VALUE 0x83e70b13 +#define KICK1_VALUE 0x95a4f1e0 + +#define OMAP_RTC_HAS_KICKER BIT(0) + +/* + * Few RTC IP revisions has special WAKE-EN Register to enable Wakeup + * generation for event Alarm. + */ +#define OMAP_RTC_HAS_IRQWAKEEN BIT(1) + +/* + * Some RTC IP revisions (like those in AM335x and DRA7x) need + * the 32KHz clock to be explicitly enabled. + */ +#define OMAP_RTC_HAS_32KCLK_EN BIT(2) static void __iomem *rtc_base; -#define rtc_read(addr) __raw_readb(rtc_base + (addr)) -#define rtc_write(val, addr) __raw_writeb(val, rtc_base + (addr)) +#define rtc_read(addr) readb(rtc_base + (addr)) +#define rtc_write(val, addr) writeb(val, rtc_base + (addr)) + +#define rtc_writel(val, addr) writel(val, rtc_base + (addr)) /* we rely on the rtc framework to handle locking (rtc->ops_lock), @@ -135,53 +169,35 @@ static irqreturn_t rtc_irq(int irq, void *rtc) return IRQ_HANDLED; } -#ifdef CONFIG_RTC_INTF_DEV - -static int -omap_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { - u8 reg; - - switch (cmd) { - case RTC_AIE_OFF: - case RTC_AIE_ON: - case RTC_UIE_OFF: - case RTC_UIE_ON: - break; - default: - return -ENOIOCTLCMD; - } + u8 reg, irqwake_reg = 0; + struct platform_device *pdev = to_platform_device(dev); + const struct platform_device_id *id_entry = + platform_get_device_id(pdev); local_irq_disable(); rtc_wait_not_busy(); reg = rtc_read(OMAP_RTC_INTERRUPTS_REG); - switch (cmd) { - /* AIE = Alarm Interrupt Enable */ - case RTC_AIE_OFF: - reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; - break; - case RTC_AIE_ON: + if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN) + irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN); + + if (enabled) { reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; - break; - /* UIE = Update Interrupt Enable (1/second) */ - case RTC_UIE_OFF: - reg &= ~OMAP_RTC_INTERRUPTS_IT_TIMER; - break; - case RTC_UIE_ON: - reg |= OMAP_RTC_INTERRUPTS_IT_TIMER; - break; + irqwake_reg |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; + } else { + reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; + irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; } rtc_wait_not_busy(); rtc_write(reg, OMAP_RTC_INTERRUPTS_REG); + if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN) + rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN); local_irq_enable(); return 0; } -#else -#define omap_rtc_ioctl NULL -#endif - /* this hardware doesn't support "don't care" alarm fields */ static int tm2bcd(struct rtc_time *tm) { @@ -276,7 +292,10 @@ static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) { - u8 reg; + u8 reg, irqwake_reg = 0; + struct platform_device *pdev = to_platform_device(dev); + const struct platform_device_id *id_entry = + platform_get_device_id(pdev); if (tm2bcd(&alm->time) < 0) return -EINVAL; @@ -292,11 +311,19 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG); reg = rtc_read(OMAP_RTC_INTERRUPTS_REG); - if (alm->enabled) + if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN) + irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN); + + if (alm->enabled) { reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; - else + irqwake_reg |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; + } else { reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; + irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; + } rtc_write(reg, OMAP_RTC_INTERRUPTS_REG); + if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN) + rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN); local_irq_enable(); @@ -304,21 +331,64 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) } static struct rtc_class_ops omap_rtc_ops = { - .ioctl = omap_rtc_ioctl, .read_time = omap_rtc_read_time, .set_time = omap_rtc_set_time, .read_alarm = omap_rtc_read_alarm, .set_alarm = omap_rtc_set_alarm, + .alarm_irq_enable = omap_rtc_alarm_irq_enable, }; static int omap_rtc_alarm; static int omap_rtc_timer; +#define OMAP_RTC_DATA_AM3352_IDX 1 +#define OMAP_RTC_DATA_DA830_IDX 2 + +static struct platform_device_id omap_rtc_devtype[] = { + { + .name = DRIVER_NAME, + }, + [OMAP_RTC_DATA_AM3352_IDX] = { + .name = "am3352-rtc", + .driver_data = OMAP_RTC_HAS_KICKER | OMAP_RTC_HAS_IRQWAKEEN | + OMAP_RTC_HAS_32KCLK_EN, + }, + [OMAP_RTC_DATA_DA830_IDX] = { + .name = "da830-rtc", + .driver_data = OMAP_RTC_HAS_KICKER, + }, + {}, +}; +MODULE_DEVICE_TABLE(platform, omap_rtc_devtype); + +static const struct of_device_id omap_rtc_of_match[] = { + { .compatible = "ti,da830-rtc", + .data = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX], + }, + { .compatible = "ti,am3352-rtc", + .data = &omap_rtc_devtype[OMAP_RTC_DATA_AM3352_IDX], + }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_rtc_of_match); + static int __init omap_rtc_probe(struct platform_device *pdev) { - struct resource *res, *mem; + struct resource *res; struct rtc_device *rtc; u8 reg, new_ctrl; + const struct platform_device_id *id_entry; + const struct of_device_id *of_id; + + of_id = of_match_device(omap_rtc_of_match, &pdev->dev); + if (of_id) + pdev->id_entry = of_id->data; + + id_entry = platform_get_device_id(pdev); + if (!id_entry) { + dev_err(&pdev->dev, "no matching device entry\n"); + return -ENODEV; + } omap_rtc_timer = platform_get_irq(pdev, 0); if (omap_rtc_timer <= 0) { @@ -333,25 +403,20 @@ static int __init omap_rtc_probe(struct platform_device *pdev) } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - pr_debug("%s: RTC resource data missing\n", pdev->name); - return -ENOENT; - } + rtc_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rtc_base)) + return PTR_ERR(rtc_base); - mem = request_mem_region(res->start, resource_size(res), pdev->name); - if (!mem) { - pr_debug("%s: RTC registers at %08x are not free\n", - pdev->name, res->start); - return -EBUSY; - } + /* Enable the clock/module so that we can access the registers */ + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); - rtc_base = ioremap(res->start, resource_size(res)); - if (!rtc_base) { - pr_debug("%s: RTC registers can't be mapped\n", pdev->name); - goto fail; + if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) { + rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG); + rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG); } - rtc = rtc_device_register(pdev->name, &pdev->dev, + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &omap_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { pr_debug("%s: can't register RTC device, err %ld\n", @@ -359,13 +424,16 @@ static int __init omap_rtc_probe(struct platform_device *pdev) goto fail0; } platform_set_drvdata(pdev, rtc); - dev_set_drvdata(&rtc->dev, mem); /* clear pending irqs, and set 1/second periodic, * which we'll use instead of update irqs */ rtc_write(0, OMAP_RTC_INTERRUPTS_REG); + /* enable RTC functional clock */ + if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN) + rtc_writel(OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG); + /* clear old status */ reg = rtc_read(OMAP_RTC_STATUS_REG); if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) { @@ -377,18 +445,18 @@ static int __init omap_rtc_probe(struct platform_device *pdev) rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG); /* handle periodic and alarm irqs */ - if (request_irq(omap_rtc_timer, rtc_irq, IRQF_DISABLED, + if (devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0, dev_name(&rtc->dev), rtc)) { pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n", pdev->name, omap_rtc_timer); - goto fail1; + goto fail0; } if ((omap_rtc_timer != omap_rtc_alarm) && - (request_irq(omap_rtc_alarm, rtc_irq, IRQF_DISABLED, + (devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0, dev_name(&rtc->dev), rtc))) { pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n", pdev->name, omap_rtc_alarm); - goto fail2; + goto fail0; } /* On boards with split power, RTC_ON_NOFF won't reset the RTC */ @@ -397,7 +465,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev) pr_info("%s: already running\n", pdev->name); /* force to 24 hour mode */ - new_ctrl = reg & ~(OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP); + new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP); new_ctrl |= OMAP_RTC_CTRL_STOP; /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE: @@ -414,6 +482,8 @@ static int __init omap_rtc_probe(struct platform_device *pdev) * is write-only, and always reads as zero...) */ + device_init_wakeup(&pdev->dev, true); + if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT) pr_info("%s: split power mode\n", pdev->name); @@ -422,70 +492,72 @@ static int __init omap_rtc_probe(struct platform_device *pdev) return 0; -fail2: - free_irq(omap_rtc_timer, NULL); -fail1: - rtc_device_unregister(rtc); fail0: - iounmap(rtc_base); -fail: - release_resource(mem); + if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) + rtc_writel(0, OMAP_RTC_KICK0_REG); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); return -EIO; } static int __exit omap_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); + const struct platform_device_id *id_entry = + platform_get_device_id(pdev); device_init_wakeup(&pdev->dev, 0); /* leave rtc running, but disable irqs */ rtc_write(0, OMAP_RTC_INTERRUPTS_REG); - free_irq(omap_rtc_timer, rtc); + if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) + rtc_writel(0, OMAP_RTC_KICK0_REG); - if (omap_rtc_timer != omap_rtc_alarm) - free_irq(omap_rtc_alarm, rtc); + /* Disable the clock/module */ + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); - release_resource(dev_get_drvdata(&rtc->dev)); - rtc_device_unregister(rtc); return 0; } -#ifdef CONFIG_PM - +#ifdef CONFIG_PM_SLEEP static u8 irqstat; -static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state) +static int omap_rtc_suspend(struct device *dev) { irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG); /* FIXME the RTC alarm is not currently acting as a wakeup event - * source, and in fact this enable() call is just saving a flag - * that's never used... + * source on some platforms, and in fact this enable() call is just + * saving a flag that's never used... */ - if (device_may_wakeup(&pdev->dev)) + if (device_may_wakeup(dev)) enable_irq_wake(omap_rtc_alarm); else rtc_write(0, OMAP_RTC_INTERRUPTS_REG); + /* Disable the clock/module */ + pm_runtime_put_sync(dev); + return 0; } -static int omap_rtc_resume(struct platform_device *pdev) +static int omap_rtc_resume(struct device *dev) { - if (device_may_wakeup(&pdev->dev)) + /* Enable the clock/module so that we can access the registers */ + pm_runtime_get_sync(dev); + + if (device_may_wakeup(dev)) disable_irq_wake(omap_rtc_alarm); else rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG); + return 0; } - -#else -#define omap_rtc_suspend NULL -#define omap_rtc_resume NULL #endif +static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume); + static void omap_rtc_shutdown(struct platform_device *pdev) { rtc_write(0, OMAP_RTC_INTERRUPTS_REG); @@ -494,26 +566,17 @@ static void omap_rtc_shutdown(struct platform_device *pdev) MODULE_ALIAS("platform:omap_rtc"); static struct platform_driver omap_rtc_driver = { .remove = __exit_p(omap_rtc_remove), - .suspend = omap_rtc_suspend, - .resume = omap_rtc_resume, .shutdown = omap_rtc_shutdown, .driver = { - .name = "omap_rtc", + .name = DRIVER_NAME, .owner = THIS_MODULE, + .pm = &omap_rtc_pm_ops, + .of_match_table = omap_rtc_of_match, }, + .id_table = omap_rtc_devtype, }; -static int __init rtc_init(void) -{ - return platform_driver_probe(&omap_rtc_driver, omap_rtc_probe); -} -module_init(rtc_init); - -static void __exit rtc_exit(void) -{ - platform_driver_unregister(&omap_rtc_driver); -} -module_exit(rtc_exit); +module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe); MODULE_AUTHOR("George G. Davis (and others)"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-palmas.c b/drivers/rtc/rtc-palmas.c new file mode 100644 index 00000000000..4dfe2d793fa --- /dev/null +++ b/drivers/rtc/rtc-palmas.c @@ -0,0 +1,378 @@ +/* + * rtc-palmas.c -- Palmas Real Time Clock driver. + + * RTC driver for TI Palma series devices like TPS65913, + * TPS65914 power management IC. + * + * Copyright (c) 2012, NVIDIA Corporation. + * + * Author: Laxman Dewangan <ldewangan@nvidia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307, USA + */ + +#include <linux/bcd.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/palmas.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/rtc.h> +#include <linux/types.h> +#include <linux/platform_device.h> +#include <linux/pm.h> + +struct palmas_rtc { + struct rtc_device *rtc; + struct device *dev; + unsigned int irq; +}; + +/* Total number of RTC registers needed to set time*/ +#define PALMAS_NUM_TIME_REGS (PALMAS_YEARS_REG - PALMAS_SECONDS_REG + 1) + +static int palmas_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + unsigned char rtc_data[PALMAS_NUM_TIME_REGS]; + struct palmas *palmas = dev_get_drvdata(dev->parent); + int ret; + + /* Copy RTC counting registers to static registers or latches */ + ret = palmas_update_bits(palmas, PALMAS_RTC_BASE, PALMAS_RTC_CTRL_REG, + PALMAS_RTC_CTRL_REG_GET_TIME, PALMAS_RTC_CTRL_REG_GET_TIME); + if (ret < 0) { + dev_err(dev, "RTC CTRL reg update failed, err: %d\n", ret); + return ret; + } + + ret = palmas_bulk_read(palmas, PALMAS_RTC_BASE, PALMAS_SECONDS_REG, + rtc_data, PALMAS_NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "RTC_SECONDS reg read failed, err = %d\n", ret); + return ret; + } + + tm->tm_sec = bcd2bin(rtc_data[0]); + tm->tm_min = bcd2bin(rtc_data[1]); + tm->tm_hour = bcd2bin(rtc_data[2]); + tm->tm_mday = bcd2bin(rtc_data[3]); + tm->tm_mon = bcd2bin(rtc_data[4]) - 1; + tm->tm_year = bcd2bin(rtc_data[5]) + 100; + + return ret; +} + +static int palmas_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + unsigned char rtc_data[PALMAS_NUM_TIME_REGS]; + struct palmas *palmas = dev_get_drvdata(dev->parent); + int ret; + + rtc_data[0] = bin2bcd(tm->tm_sec); + rtc_data[1] = bin2bcd(tm->tm_min); + rtc_data[2] = bin2bcd(tm->tm_hour); + rtc_data[3] = bin2bcd(tm->tm_mday); + rtc_data[4] = bin2bcd(tm->tm_mon + 1); + rtc_data[5] = bin2bcd(tm->tm_year - 100); + + /* Stop RTC while updating the RTC time registers */ + ret = palmas_update_bits(palmas, PALMAS_RTC_BASE, PALMAS_RTC_CTRL_REG, + PALMAS_RTC_CTRL_REG_STOP_RTC, 0); + if (ret < 0) { + dev_err(dev, "RTC stop failed, err = %d\n", ret); + return ret; + } + + ret = palmas_bulk_write(palmas, PALMAS_RTC_BASE, PALMAS_SECONDS_REG, + rtc_data, PALMAS_NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "RTC_SECONDS reg write failed, err = %d\n", ret); + return ret; + } + + /* Start back RTC */ + ret = palmas_update_bits(palmas, PALMAS_RTC_BASE, PALMAS_RTC_CTRL_REG, + PALMAS_RTC_CTRL_REG_STOP_RTC, PALMAS_RTC_CTRL_REG_STOP_RTC); + if (ret < 0) + dev_err(dev, "RTC start failed, err = %d\n", ret); + return ret; +} + +static int palmas_rtc_alarm_irq_enable(struct device *dev, unsigned enabled) +{ + struct palmas *palmas = dev_get_drvdata(dev->parent); + u8 val; + + val = enabled ? PALMAS_RTC_INTERRUPTS_REG_IT_ALARM : 0; + return palmas_write(palmas, PALMAS_RTC_BASE, + PALMAS_RTC_INTERRUPTS_REG, val); +} + +static int palmas_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + unsigned char alarm_data[PALMAS_NUM_TIME_REGS]; + u32 int_val; + struct palmas *palmas = dev_get_drvdata(dev->parent); + int ret; + + ret = palmas_bulk_read(palmas, PALMAS_RTC_BASE, + PALMAS_ALARM_SECONDS_REG, + alarm_data, PALMAS_NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "RTC_ALARM_SECONDS read failed, err = %d\n", ret); + return ret; + } + + alm->time.tm_sec = bcd2bin(alarm_data[0]); + alm->time.tm_min = bcd2bin(alarm_data[1]); + alm->time.tm_hour = bcd2bin(alarm_data[2]); + alm->time.tm_mday = bcd2bin(alarm_data[3]); + alm->time.tm_mon = bcd2bin(alarm_data[4]) - 1; + alm->time.tm_year = bcd2bin(alarm_data[5]) + 100; + + ret = palmas_read(palmas, PALMAS_RTC_BASE, PALMAS_RTC_INTERRUPTS_REG, + &int_val); + if (ret < 0) { + dev_err(dev, "RTC_INTERRUPTS reg read failed, err = %d\n", ret); + return ret; + } + + if (int_val & PALMAS_RTC_INTERRUPTS_REG_IT_ALARM) + alm->enabled = 1; + return ret; +} + +static int palmas_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + unsigned char alarm_data[PALMAS_NUM_TIME_REGS]; + struct palmas *palmas = dev_get_drvdata(dev->parent); + int ret; + + ret = palmas_rtc_alarm_irq_enable(dev, 0); + if (ret < 0) { + dev_err(dev, "Disable RTC alarm failed\n"); + return ret; + } + + alarm_data[0] = bin2bcd(alm->time.tm_sec); + alarm_data[1] = bin2bcd(alm->time.tm_min); + alarm_data[2] = bin2bcd(alm->time.tm_hour); + alarm_data[3] = bin2bcd(alm->time.tm_mday); + alarm_data[4] = bin2bcd(alm->time.tm_mon + 1); + alarm_data[5] = bin2bcd(alm->time.tm_year - 100); + + ret = palmas_bulk_write(palmas, PALMAS_RTC_BASE, + PALMAS_ALARM_SECONDS_REG, alarm_data, PALMAS_NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "ALARM_SECONDS_REG write failed, err = %d\n", ret); + return ret; + } + + if (alm->enabled) + ret = palmas_rtc_alarm_irq_enable(dev, 1); + return ret; +} + +static int palmas_clear_interrupts(struct device *dev) +{ + struct palmas *palmas = dev_get_drvdata(dev->parent); + unsigned int rtc_reg; + int ret; + + ret = palmas_read(palmas, PALMAS_RTC_BASE, PALMAS_RTC_STATUS_REG, + &rtc_reg); + if (ret < 0) { + dev_err(dev, "RTC_STATUS read failed, err = %d\n", ret); + return ret; + } + + ret = palmas_write(palmas, PALMAS_RTC_BASE, PALMAS_RTC_STATUS_REG, + rtc_reg); + if (ret < 0) { + dev_err(dev, "RTC_STATUS write failed, err = %d\n", ret); + return ret; + } + return 0; +} + +static irqreturn_t palmas_rtc_interrupt(int irq, void *context) +{ + struct palmas_rtc *palmas_rtc = context; + struct device *dev = palmas_rtc->dev; + int ret; + + ret = palmas_clear_interrupts(dev); + if (ret < 0) { + dev_err(dev, "RTC interrupt clear failed, err = %d\n", ret); + return IRQ_NONE; + } + + rtc_update_irq(palmas_rtc->rtc, 1, RTC_IRQF | RTC_AF); + return IRQ_HANDLED; +} + +static struct rtc_class_ops palmas_rtc_ops = { + .read_time = palmas_rtc_read_time, + .set_time = palmas_rtc_set_time, + .read_alarm = palmas_rtc_read_alarm, + .set_alarm = palmas_rtc_set_alarm, + .alarm_irq_enable = palmas_rtc_alarm_irq_enable, +}; + +static int palmas_rtc_probe(struct platform_device *pdev) +{ + struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); + struct palmas_rtc *palmas_rtc = NULL; + int ret; + bool enable_bb_charging = false; + bool high_bb_charging; + + if (pdev->dev.of_node) { + enable_bb_charging = of_property_read_bool(pdev->dev.of_node, + "ti,backup-battery-chargeable"); + high_bb_charging = of_property_read_bool(pdev->dev.of_node, + "ti,backup-battery-charge-high-current"); + } + + palmas_rtc = devm_kzalloc(&pdev->dev, sizeof(struct palmas_rtc), + GFP_KERNEL); + if (!palmas_rtc) + return -ENOMEM; + + /* Clear pending interrupts */ + ret = palmas_clear_interrupts(&pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "clear RTC int failed, err = %d\n", ret); + return ret; + } + + palmas_rtc->dev = &pdev->dev; + platform_set_drvdata(pdev, palmas_rtc); + + if (enable_bb_charging) { + unsigned reg = PALMAS_BACKUP_BATTERY_CTRL_BBS_BBC_LOW_ICHRG; + + if (high_bb_charging) + reg = 0; + + ret = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE, + PALMAS_BACKUP_BATTERY_CTRL, + PALMAS_BACKUP_BATTERY_CTRL_BBS_BBC_LOW_ICHRG, reg); + if (ret < 0) { + dev_err(&pdev->dev, + "BACKUP_BATTERY_CTRL update failed, %d\n", ret); + return ret; + } + + ret = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE, + PALMAS_BACKUP_BATTERY_CTRL, + PALMAS_BACKUP_BATTERY_CTRL_BB_CHG_EN, + PALMAS_BACKUP_BATTERY_CTRL_BB_CHG_EN); + if (ret < 0) { + dev_err(&pdev->dev, + "BACKUP_BATTERY_CTRL update failed, %d\n", ret); + return ret; + } + } + + /* Start RTC */ + ret = palmas_update_bits(palmas, PALMAS_RTC_BASE, PALMAS_RTC_CTRL_REG, + PALMAS_RTC_CTRL_REG_STOP_RTC, + PALMAS_RTC_CTRL_REG_STOP_RTC); + if (ret < 0) { + dev_err(&pdev->dev, "RTC_CTRL write failed, err = %d\n", ret); + return ret; + } + + palmas_rtc->irq = platform_get_irq(pdev, 0); + + device_init_wakeup(&pdev->dev, 1); + palmas_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &palmas_rtc_ops, THIS_MODULE); + if (IS_ERR(palmas_rtc->rtc)) { + ret = PTR_ERR(palmas_rtc->rtc); + dev_err(&pdev->dev, "RTC register failed, err = %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(&pdev->dev, palmas_rtc->irq, NULL, + palmas_rtc_interrupt, + IRQF_TRIGGER_LOW | IRQF_ONESHOT | + IRQF_EARLY_RESUME, + dev_name(&pdev->dev), palmas_rtc); + if (ret < 0) { + dev_err(&pdev->dev, "IRQ request failed, err = %d\n", ret); + return ret; + } + + return 0; +} + +static int palmas_rtc_remove(struct platform_device *pdev) +{ + palmas_rtc_alarm_irq_enable(&pdev->dev, 0); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int palmas_rtc_suspend(struct device *dev) +{ + struct palmas_rtc *palmas_rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(palmas_rtc->irq); + return 0; +} + +static int palmas_rtc_resume(struct device *dev) +{ + struct palmas_rtc *palmas_rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(palmas_rtc->irq); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(palmas_rtc_pm_ops, palmas_rtc_suspend, + palmas_rtc_resume); + +#ifdef CONFIG_OF +static const struct of_device_id of_palmas_rtc_match[] = { + { .compatible = "ti,palmas-rtc"}, + { }, +}; +MODULE_DEVICE_TABLE(of, of_palmas_rtc_match); +#endif + +static struct platform_driver palmas_rtc_driver = { + .probe = palmas_rtc_probe, + .remove = palmas_rtc_remove, + .driver = { + .owner = THIS_MODULE, + .name = "palmas-rtc", + .pm = &palmas_rtc_pm_ops, + .of_match_table = of_match_ptr(of_palmas_rtc_match), + }, +}; + +module_platform_driver(palmas_rtc_driver); + +MODULE_ALIAS("platform:palmas_rtc"); +MODULE_DESCRIPTION("TI PALMAS series RTC driver"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-pcap.c b/drivers/rtc/rtc-pcap.c index 25c0b3fd44f..40b5c630bc7 100644 --- a/drivers/rtc/rtc-pcap.c +++ b/drivers/rtc/rtc-pcap.c @@ -131,94 +131,64 @@ static int pcap_rtc_alarm_irq_enable(struct device *dev, unsigned int en) return pcap_rtc_irq_enable(dev, PCAP_IRQ_TODA, en); } -static int pcap_rtc_update_irq_enable(struct device *dev, unsigned int en) -{ - return pcap_rtc_irq_enable(dev, PCAP_IRQ_1HZ, en); -} - static const struct rtc_class_ops pcap_rtc_ops = { .read_time = pcap_rtc_read_time, .read_alarm = pcap_rtc_read_alarm, .set_alarm = pcap_rtc_set_alarm, .set_mmss = pcap_rtc_set_mmss, .alarm_irq_enable = pcap_rtc_alarm_irq_enable, - .update_irq_enable = pcap_rtc_update_irq_enable, }; -static int __devinit pcap_rtc_probe(struct platform_device *pdev) +static int __init pcap_rtc_probe(struct platform_device *pdev) { struct pcap_rtc *pcap_rtc; int timer_irq, alarm_irq; int err = -ENOMEM; - pcap_rtc = kmalloc(sizeof(struct pcap_rtc), GFP_KERNEL); + pcap_rtc = devm_kzalloc(&pdev->dev, sizeof(struct pcap_rtc), + GFP_KERNEL); if (!pcap_rtc) return err; pcap_rtc->pcap = dev_get_drvdata(pdev->dev.parent); - pcap_rtc->rtc = rtc_device_register("pcap", &pdev->dev, - &pcap_rtc_ops, THIS_MODULE); - if (IS_ERR(pcap_rtc->rtc)) { - err = PTR_ERR(pcap_rtc->rtc); - goto fail_rtc; - } - platform_set_drvdata(pdev, pcap_rtc); + pcap_rtc->rtc = devm_rtc_device_register(&pdev->dev, "pcap", + &pcap_rtc_ops, THIS_MODULE); + if (IS_ERR(pcap_rtc->rtc)) + return PTR_ERR(pcap_rtc->rtc); + timer_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ); alarm_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA); - err = request_irq(timer_irq, pcap_rtc_irq, 0, "RTC Timer", pcap_rtc); + err = devm_request_irq(&pdev->dev, timer_irq, pcap_rtc_irq, 0, + "RTC Timer", pcap_rtc); if (err) - goto fail_timer; + return err; - err = request_irq(alarm_irq, pcap_rtc_irq, 0, "RTC Alarm", pcap_rtc); + err = devm_request_irq(&pdev->dev, alarm_irq, pcap_rtc_irq, 0, + "RTC Alarm", pcap_rtc); if (err) - goto fail_alarm; + return err; return 0; -fail_alarm: - free_irq(timer_irq, pcap_rtc); -fail_timer: - rtc_device_unregister(pcap_rtc->rtc); -fail_rtc: - kfree(pcap_rtc); - return err; } -static int __devexit pcap_rtc_remove(struct platform_device *pdev) +static int __exit pcap_rtc_remove(struct platform_device *pdev) { - struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); - - free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ), pcap_rtc); - free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA), pcap_rtc); - rtc_device_unregister(pcap_rtc->rtc); - kfree(pcap_rtc); - return 0; } static struct platform_driver pcap_rtc_driver = { - .remove = __devexit_p(pcap_rtc_remove), + .remove = __exit_p(pcap_rtc_remove), .driver = { .name = "pcap-rtc", .owner = THIS_MODULE, }, }; -static int __init rtc_pcap_init(void) -{ - return platform_driver_probe(&pcap_rtc_driver, pcap_rtc_probe); -} - -static void __exit rtc_pcap_exit(void) -{ - platform_driver_unregister(&pcap_rtc_driver); -} - -module_init(rtc_pcap_init); -module_exit(rtc_pcap_exit); +module_platform_driver_probe(pcap_rtc_driver, pcap_rtc_probe); MODULE_DESCRIPTION("Motorola pcap rtc driver"); MODULE_AUTHOR("guiming zhuo <gmzhuo@gmail.com>"); diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c index 71bab0ef544..d1953bb244c 100644 --- a/drivers/rtc/rtc-pcf2123.c +++ b/drivers/rtc/rtc-pcf2123.c @@ -18,11 +18,11 @@ * should look something like: * * static struct spi_board_info ek_spi_devices[] = { - * ... - * { - * .modalias = "rtc-pcf2123", - * .chip_select = 1, - * .controller_data = (void *)AT91_PIN_PA10, + * ... + * { + * .modalias = "rtc-pcf2123", + * .chip_select = 1, + * .controller_data = (void *)AT91_PIN_PA10, * .max_speed_hz = 1000 * 1000, * .mode = SPI_CS_HIGH, * .bus_num = 0, @@ -42,6 +42,8 @@ #include <linux/slab.h> #include <linux/rtc.h> #include <linux/spi/spi.h> +#include <linux/module.h> +#include <linux/sysfs.h> #define DRV_VERSION "0.6" @@ -92,8 +94,9 @@ static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr, r = container_of(attr, struct pcf2123_sysfs_reg, attr); - if (strict_strtoul(r->name, 16, ®)) - return -EINVAL; + ret = kstrtoul(r->name, 16, ®); + if (ret) + return ret; txbuf[0] = PCF2123_READ | reg; ret = spi_write_then_read(spi, txbuf, 1, rxbuf, 1); @@ -115,9 +118,13 @@ static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr, r = container_of(attr, struct pcf2123_sysfs_reg, attr); - if (strict_strtoul(r->name, 16, ®) - || strict_strtoul(buffer, 10, &val)) - return -EINVAL; + ret = kstrtoul(r->name, 16, ®); + if (ret) + return ret; + + ret = kstrtoul(buffer, 10, &val); + if (ret) + return ret; txbuf[0] = PCF2123_WRITE | reg; txbuf[1] = val; @@ -217,14 +224,15 @@ static const struct rtc_class_ops pcf2123_rtc_ops = { .set_time = pcf2123_rtc_set_time, }; -static int __devinit pcf2123_probe(struct spi_device *spi) +static int pcf2123_probe(struct spi_device *spi) { struct rtc_device *rtc; struct pcf2123_plat_data *pdata; u8 txbuf[2], rxbuf[2]; int ret, i; - pdata = kzalloc(sizeof(struct pcf2123_plat_data), GFP_KERNEL); + pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data), + GFP_KERNEL); if (!pdata) return -ENOMEM; spi->dev.platform_data = pdata; @@ -263,6 +271,7 @@ static int __devinit pcf2123_probe(struct spi_device *spi) if (!(rxbuf[0] & 0x20)) { dev_err(&spi->dev, "chip not found\n"); + ret = -ENODEV; goto kfree_exit; } @@ -279,7 +288,7 @@ static int __devinit pcf2123_probe(struct spi_device *spi) pcf2123_delay_trec(); /* Finalize the initialization */ - rtc = rtc_device_register(pcf2123_driver.driver.name, &spi->dev, + rtc = devm_rtc_device_register(&spi->dev, pcf2123_driver.driver.name, &pcf2123_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { @@ -291,6 +300,7 @@ static int __devinit pcf2123_probe(struct spi_device *spi) pdata->rtc = rtc; for (i = 0; i < 16; i++) { + sysfs_attr_init(&pdata->regs[i].attr.attr); sprintf(pdata->regs[i].name, "%1x", i); pdata->regs[i].attr.attr.mode = S_IRUGO | S_IWUSR; pdata->regs[i].attr.attr.name = pdata->regs[i].name; @@ -311,26 +321,20 @@ sysfs_exit: device_remove_file(&spi->dev, &pdata->regs[i].attr); kfree_exit: - kfree(pdata); spi->dev.platform_data = NULL; return ret; } -static int __devexit pcf2123_remove(struct spi_device *spi) +static int pcf2123_remove(struct spi_device *spi) { - struct pcf2123_plat_data *pdata = spi->dev.platform_data; + struct pcf2123_plat_data *pdata = dev_get_platdata(&spi->dev); int i; if (pdata) { - struct rtc_device *rtc = pdata->rtc; - - if (rtc) - rtc_device_unregister(rtc); for (i = 0; i < 16; i++) if (pdata->regs[i].name[0]) device_remove_file(&spi->dev, &pdata->regs[i].attr); - kfree(pdata); } return 0; @@ -339,27 +343,15 @@ static int __devexit pcf2123_remove(struct spi_device *spi) static struct spi_driver pcf2123_driver = { .driver = { .name = "rtc-pcf2123", - .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = pcf2123_probe, - .remove = __devexit_p(pcf2123_remove), + .remove = pcf2123_remove, }; -static int __init pcf2123_init(void) -{ - return spi_register_driver(&pcf2123_driver); -} - -static void __exit pcf2123_exit(void) -{ - spi_unregister_driver(&pcf2123_driver); -} +module_spi_driver(pcf2123_driver); MODULE_AUTHOR("Chris Verges <chrisv@cyberswitching.com>"); MODULE_DESCRIPTION("NXP PCF2123 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(pcf2123_init); -module_exit(pcf2123_exit); diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c new file mode 100644 index 00000000000..9bd842e9774 --- /dev/null +++ b/drivers/rtc/rtc-pcf2127.c @@ -0,0 +1,232 @@ +/* + * An I2C driver for the NXP PCF2127 RTC + * Copyright 2013 Til-Technologies + * + * Author: Renaud Cerrato <r.cerrato@til-technologies.fr> + * + * based on the other drivers in this same directory. + * + * http://www.nxp.com/documents/data_sheet/PCF2127AT.pdf + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/i2c.h> +#include <linux/bcd.h> +#include <linux/rtc.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/of.h> + +#define DRV_VERSION "0.0.1" + +#define PCF2127_REG_CTRL1 (0x00) /* Control Register 1 */ +#define PCF2127_REG_CTRL2 (0x01) /* Control Register 2 */ +#define PCF2127_REG_CTRL3 (0x02) /* Control Register 3 */ +#define PCF2127_REG_SC (0x03) /* datetime */ +#define PCF2127_REG_MN (0x04) +#define PCF2127_REG_HR (0x05) +#define PCF2127_REG_DM (0x06) +#define PCF2127_REG_DW (0x07) +#define PCF2127_REG_MO (0x08) +#define PCF2127_REG_YR (0x09) + +static struct i2c_driver pcf2127_driver; + +struct pcf2127 { + struct rtc_device *rtc; + int voltage_low; /* indicates if a low_voltage was detected */ +}; + +/* + * In the routines that deal directly with the pcf2127 hardware, we use + * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. + */ +static int pcf2127_get_datetime(struct i2c_client *client, struct rtc_time *tm) +{ + struct pcf2127 *pcf2127 = i2c_get_clientdata(client); + unsigned char buf[10] = { PCF2127_REG_CTRL1 }; + + /* read registers */ + if (i2c_master_send(client, buf, 1) != 1 || + i2c_master_recv(client, buf, sizeof(buf)) != sizeof(buf)) { + dev_err(&client->dev, "%s: read error\n", __func__); + return -EIO; + } + + if (buf[PCF2127_REG_CTRL3] & 0x04) { + pcf2127->voltage_low = 1; + dev_info(&client->dev, + "low voltage detected, date/time is not reliable.\n"); + } + + dev_dbg(&client->dev, + "%s: raw data is cr1=%02x, cr2=%02x, cr3=%02x, " + "sec=%02x, min=%02x, hr=%02x, " + "mday=%02x, wday=%02x, mon=%02x, year=%02x\n", + __func__, + buf[0], buf[1], buf[2], + buf[3], buf[4], buf[5], + buf[6], buf[7], buf[8], buf[9]); + + + tm->tm_sec = bcd2bin(buf[PCF2127_REG_SC] & 0x7F); + tm->tm_min = bcd2bin(buf[PCF2127_REG_MN] & 0x7F); + tm->tm_hour = bcd2bin(buf[PCF2127_REG_HR] & 0x3F); /* rtc hr 0-23 */ + tm->tm_mday = bcd2bin(buf[PCF2127_REG_DM] & 0x3F); + tm->tm_wday = buf[PCF2127_REG_DW] & 0x07; + tm->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */ + tm->tm_year = bcd2bin(buf[PCF2127_REG_YR]); + if (tm->tm_year < 70) + tm->tm_year += 100; /* assume we are in 1970...2069 */ + + dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " + "mday=%d, mon=%d, year=%d, wday=%d\n", + __func__, + tm->tm_sec, tm->tm_min, tm->tm_hour, + tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); + + /* the clock can give out invalid datetime, but we cannot return + * -EINVAL otherwise hwclock will refuse to set the time on bootup. + */ + if (rtc_valid_tm(tm) < 0) + dev_err(&client->dev, "retrieved date/time is not valid.\n"); + + return 0; +} + +static int pcf2127_set_datetime(struct i2c_client *client, struct rtc_time *tm) +{ + unsigned char buf[8]; + int i = 0, err; + + dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, " + "mday=%d, mon=%d, year=%d, wday=%d\n", + __func__, + tm->tm_sec, tm->tm_min, tm->tm_hour, + tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); + + /* start register address */ + buf[i++] = PCF2127_REG_SC; + + /* hours, minutes and seconds */ + buf[i++] = bin2bcd(tm->tm_sec); + buf[i++] = bin2bcd(tm->tm_min); + buf[i++] = bin2bcd(tm->tm_hour); + buf[i++] = bin2bcd(tm->tm_mday); + buf[i++] = tm->tm_wday & 0x07; + + /* month, 1 - 12 */ + buf[i++] = bin2bcd(tm->tm_mon + 1); + + /* year */ + buf[i++] = bin2bcd(tm->tm_year % 100); + + /* write register's data */ + err = i2c_master_send(client, buf, i); + if (err != i) { + dev_err(&client->dev, + "%s: err=%d", __func__, err); + return -EIO; + } + + return 0; +} + +#ifdef CONFIG_RTC_INTF_DEV +static int pcf2127_rtc_ioctl(struct device *dev, + unsigned int cmd, unsigned long arg) +{ + struct pcf2127 *pcf2127 = i2c_get_clientdata(to_i2c_client(dev)); + + switch (cmd) { + case RTC_VL_READ: + if (pcf2127->voltage_low) + dev_info(dev, "low voltage detected, date/time is not reliable.\n"); + + if (copy_to_user((void __user *)arg, &pcf2127->voltage_low, + sizeof(int))) + return -EFAULT; + return 0; + default: + return -ENOIOCTLCMD; + } +} +#else +#define pcf2127_rtc_ioctl NULL +#endif + +static int pcf2127_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + return pcf2127_get_datetime(to_i2c_client(dev), tm); +} + +static int pcf2127_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + return pcf2127_set_datetime(to_i2c_client(dev), tm); +} + +static const struct rtc_class_ops pcf2127_rtc_ops = { + .ioctl = pcf2127_rtc_ioctl, + .read_time = pcf2127_rtc_read_time, + .set_time = pcf2127_rtc_set_time, +}; + +static int pcf2127_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pcf2127 *pcf2127; + + dev_dbg(&client->dev, "%s\n", __func__); + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -ENODEV; + + pcf2127 = devm_kzalloc(&client->dev, sizeof(struct pcf2127), + GFP_KERNEL); + if (!pcf2127) + return -ENOMEM; + + dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); + + i2c_set_clientdata(client, pcf2127); + + pcf2127->rtc = devm_rtc_device_register(&client->dev, + pcf2127_driver.driver.name, + &pcf2127_rtc_ops, THIS_MODULE); + + return PTR_ERR_OR_ZERO(pcf2127->rtc); +} + +static const struct i2c_device_id pcf2127_id[] = { + { "pcf2127", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pcf2127_id); + +#ifdef CONFIG_OF +static const struct of_device_id pcf2127_of_match[] = { + { .compatible = "nxp,pcf2127" }, + {} +}; +MODULE_DEVICE_TABLE(of, pcf2127_of_match); +#endif + +static struct i2c_driver pcf2127_driver = { + .driver = { + .name = "rtc-pcf2127", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(pcf2127_of_match), + }, + .probe = pcf2127_probe, + .id_table = pcf2127_id, +}; + +module_i2c_driver(pcf2127_driver); + +MODULE_AUTHOR("Renaud Cerrato <r.cerrato@til-technologies.fr>"); +MODULE_DESCRIPTION("NXP PCF2127 RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c index 16edf94ab42..e6b6911c8e0 100644 --- a/drivers/rtc/rtc-pcf50633.c +++ b/drivers/rtc/rtc-pcf50633.c @@ -58,7 +58,6 @@ struct pcf50633_time { struct pcf50633_rtc { int alarm_enabled; - int second_enabled; int alarm_pending; struct pcf50633 *pcf; @@ -106,25 +105,6 @@ pcf50633_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int -pcf50633_rtc_update_irq_enable(struct device *dev, unsigned int enabled) -{ - struct pcf50633_rtc *rtc = dev_get_drvdata(dev); - int err; - - if (enabled) - err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND); - else - err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND); - - if (err < 0) - return err; - - rtc->second_enabled = enabled; - - return 0; -} - static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct pcf50633_rtc *rtc; @@ -162,7 +142,7 @@ static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct pcf50633_rtc *rtc; struct pcf50633_time pcf_tm; - int second_masked, alarm_masked, ret = 0; + int alarm_masked, ret = 0; rtc = dev_get_drvdata(dev); @@ -181,11 +161,8 @@ static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm) pcf_tm.time[PCF50633_TI_SEC]); - second_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_SECOND); alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM); - if (!second_masked) - pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND); if (!alarm_masked) pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM); @@ -194,8 +171,6 @@ static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm) PCF50633_TI_EXTENT, &pcf_tm.time[0]); - if (!second_masked) - pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND); if (!alarm_masked) pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM); @@ -262,63 +237,44 @@ static struct rtc_class_ops pcf50633_rtc_ops = { .set_time = pcf50633_rtc_set_time, .read_alarm = pcf50633_rtc_read_alarm, .set_alarm = pcf50633_rtc_set_alarm, - .alarm_irq_enable = pcf50633_rtc_alarm_irq_enable, - .update_irq_enable = pcf50633_rtc_update_irq_enable, + .alarm_irq_enable = pcf50633_rtc_alarm_irq_enable, }; static void pcf50633_rtc_irq(int irq, void *data) { struct pcf50633_rtc *rtc = data; - switch (irq) { - case PCF50633_IRQ_ALARM: - rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); - rtc->alarm_pending = 1; - break; - case PCF50633_IRQ_SECOND: - rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF); - break; - } + rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); + rtc->alarm_pending = 1; } -static int __devinit pcf50633_rtc_probe(struct platform_device *pdev) +static int pcf50633_rtc_probe(struct platform_device *pdev) { struct pcf50633_rtc *rtc; - rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); if (!rtc) return -ENOMEM; rtc->pcf = dev_to_pcf50633(pdev->dev.parent); platform_set_drvdata(pdev, rtc); - rtc->rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev, + rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "pcf50633-rtc", &pcf50633_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc->rtc_dev)) { - int ret = PTR_ERR(rtc->rtc_dev); - kfree(rtc); - return ret; - } + if (IS_ERR(rtc->rtc_dev)) + return PTR_ERR(rtc->rtc_dev); pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM, pcf50633_rtc_irq, rtc); - pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_SECOND, - pcf50633_rtc_irq, rtc); - return 0; } -static int __devexit pcf50633_rtc_remove(struct platform_device *pdev) +static int pcf50633_rtc_remove(struct platform_device *pdev) { struct pcf50633_rtc *rtc; rtc = platform_get_drvdata(pdev); - pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM); - pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_SECOND); - - rtc_device_unregister(rtc->rtc_dev); - kfree(rtc); return 0; } @@ -328,20 +284,10 @@ static struct platform_driver pcf50633_rtc_driver = { .name = "pcf50633-rtc", }, .probe = pcf50633_rtc_probe, - .remove = __devexit_p(pcf50633_rtc_remove), + .remove = pcf50633_rtc_remove, }; -static int __init pcf50633_rtc_init(void) -{ - return platform_driver_register(&pcf50633_rtc_driver); -} -module_init(pcf50633_rtc_init); - -static void __exit pcf50633_rtc_exit(void) -{ - platform_driver_unregister(&pcf50633_rtc_driver); -} -module_exit(pcf50633_rtc_exit); +module_platform_driver(pcf50633_rtc_driver); MODULE_DESCRIPTION("PCF50633 RTC driver"); MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c new file mode 100644 index 00000000000..4cdb64be061 --- /dev/null +++ b/drivers/rtc/rtc-pcf8523.c @@ -0,0 +1,347 @@ +/* + * Copyright (C) 2012 Avionic Design GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/bcd.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/rtc.h> +#include <linux/of.h> + +#define DRIVER_NAME "rtc-pcf8523" + +#define REG_CONTROL1 0x00 +#define REG_CONTROL1_CAP_SEL (1 << 7) +#define REG_CONTROL1_STOP (1 << 5) + +#define REG_CONTROL3 0x02 +#define REG_CONTROL3_PM_BLD (1 << 7) /* battery low detection disabled */ +#define REG_CONTROL3_PM_VDD (1 << 6) /* switch-over disabled */ +#define REG_CONTROL3_PM_DSM (1 << 5) /* direct switching mode */ +#define REG_CONTROL3_PM_MASK 0xe0 +#define REG_CONTROL3_BLF (1 << 2) /* battery low bit, read-only */ + +#define REG_SECONDS 0x03 +#define REG_SECONDS_OS (1 << 7) + +#define REG_MINUTES 0x04 +#define REG_HOURS 0x05 +#define REG_DAYS 0x06 +#define REG_WEEKDAYS 0x07 +#define REG_MONTHS 0x08 +#define REG_YEARS 0x09 + +struct pcf8523 { + struct rtc_device *rtc; +}; + +static int pcf8523_read(struct i2c_client *client, u8 reg, u8 *valuep) +{ + struct i2c_msg msgs[2]; + u8 value = 0; + int err; + + msgs[0].addr = client->addr; + msgs[0].flags = 0; + msgs[0].len = sizeof(reg); + msgs[0].buf = ® + + msgs[1].addr = client->addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = sizeof(value); + msgs[1].buf = &value; + + err = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (err < 0) + return err; + + *valuep = value; + + return 0; +} + +static int pcf8523_write(struct i2c_client *client, u8 reg, u8 value) +{ + u8 buffer[2] = { reg, value }; + struct i2c_msg msg; + int err; + + msg.addr = client->addr; + msg.flags = 0; + msg.len = sizeof(buffer); + msg.buf = buffer; + + err = i2c_transfer(client->adapter, &msg, 1); + if (err < 0) + return err; + + return 0; +} + +static int pcf8523_select_capacitance(struct i2c_client *client, bool high) +{ + u8 value; + int err; + + err = pcf8523_read(client, REG_CONTROL1, &value); + if (err < 0) + return err; + + if (!high) + value &= ~REG_CONTROL1_CAP_SEL; + else + value |= REG_CONTROL1_CAP_SEL; + + err = pcf8523_write(client, REG_CONTROL1, value); + if (err < 0) + return err; + + return err; +} + +static int pcf8523_set_pm(struct i2c_client *client, u8 pm) +{ + u8 value; + int err; + + err = pcf8523_read(client, REG_CONTROL3, &value); + if (err < 0) + return err; + + value = (value & ~REG_CONTROL3_PM_MASK) | pm; + + err = pcf8523_write(client, REG_CONTROL3, value); + if (err < 0) + return err; + + return 0; +} + +static int pcf8523_stop_rtc(struct i2c_client *client) +{ + u8 value; + int err; + + err = pcf8523_read(client, REG_CONTROL1, &value); + if (err < 0) + return err; + + value |= REG_CONTROL1_STOP; + + err = pcf8523_write(client, REG_CONTROL1, value); + if (err < 0) + return err; + + return 0; +} + +static int pcf8523_start_rtc(struct i2c_client *client) +{ + u8 value; + int err; + + err = pcf8523_read(client, REG_CONTROL1, &value); + if (err < 0) + return err; + + value &= ~REG_CONTROL1_STOP; + + err = pcf8523_write(client, REG_CONTROL1, value); + if (err < 0) + return err; + + return 0; +} + +static int pcf8523_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + u8 start = REG_SECONDS, regs[7]; + struct i2c_msg msgs[2]; + int err; + + msgs[0].addr = client->addr; + msgs[0].flags = 0; + msgs[0].len = 1; + msgs[0].buf = &start; + + msgs[1].addr = client->addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = sizeof(regs); + msgs[1].buf = regs; + + err = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (err < 0) + return err; + + if (regs[0] & REG_SECONDS_OS) { + /* + * If the oscillator was stopped, try to clear the flag. Upon + * power-up the flag is always set, but if we cannot clear it + * the oscillator isn't running properly for some reason. The + * sensible thing therefore is to return an error, signalling + * that the clock cannot be assumed to be correct. + */ + + regs[0] &= ~REG_SECONDS_OS; + + err = pcf8523_write(client, REG_SECONDS, regs[0]); + if (err < 0) + return err; + + err = pcf8523_read(client, REG_SECONDS, ®s[0]); + if (err < 0) + return err; + + if (regs[0] & REG_SECONDS_OS) + return -EAGAIN; + } + + tm->tm_sec = bcd2bin(regs[0] & 0x7f); + tm->tm_min = bcd2bin(regs[1] & 0x7f); + tm->tm_hour = bcd2bin(regs[2] & 0x3f); + tm->tm_mday = bcd2bin(regs[3] & 0x3f); + tm->tm_wday = regs[4] & 0x7; + tm->tm_mon = bcd2bin(regs[5] & 0x1f) - 1; + tm->tm_year = bcd2bin(regs[6]) + 100; + + return rtc_valid_tm(tm); +} + +static int pcf8523_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct i2c_msg msg; + u8 regs[8]; + int err; + + err = pcf8523_stop_rtc(client); + if (err < 0) + return err; + + regs[0] = REG_SECONDS; + regs[1] = bin2bcd(tm->tm_sec); + regs[2] = bin2bcd(tm->tm_min); + regs[3] = bin2bcd(tm->tm_hour); + regs[4] = bin2bcd(tm->tm_mday); + regs[5] = tm->tm_wday; + regs[6] = bin2bcd(tm->tm_mon + 1); + regs[7] = bin2bcd(tm->tm_year - 100); + + msg.addr = client->addr; + msg.flags = 0; + msg.len = sizeof(regs); + msg.buf = regs; + + err = i2c_transfer(client->adapter, &msg, 1); + if (err < 0) { + /* + * If the time cannot be set, restart the RTC anyway. Note + * that errors are ignored if the RTC cannot be started so + * that we have a chance to propagate the original error. + */ + pcf8523_start_rtc(client); + return err; + } + + return pcf8523_start_rtc(client); +} + +#ifdef CONFIG_RTC_INTF_DEV +static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd, + unsigned long arg) +{ + struct i2c_client *client = to_i2c_client(dev); + u8 value; + int ret = 0, err; + + switch (cmd) { + case RTC_VL_READ: + err = pcf8523_read(client, REG_CONTROL3, &value); + if (err < 0) + return err; + + if (value & REG_CONTROL3_BLF) + ret = 1; + + if (copy_to_user((void __user *)arg, &ret, sizeof(int))) + return -EFAULT; + + return 0; + default: + return -ENOIOCTLCMD; + } +} +#else +#define pcf8523_rtc_ioctl NULL +#endif + +static const struct rtc_class_ops pcf8523_rtc_ops = { + .read_time = pcf8523_rtc_read_time, + .set_time = pcf8523_rtc_set_time, + .ioctl = pcf8523_rtc_ioctl, +}; + +static int pcf8523_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pcf8523 *pcf; + int err; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -ENODEV; + + pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL); + if (!pcf) + return -ENOMEM; + + err = pcf8523_select_capacitance(client, true); + if (err < 0) + return err; + + err = pcf8523_set_pm(client, 0); + if (err < 0) + return err; + + pcf->rtc = devm_rtc_device_register(&client->dev, DRIVER_NAME, + &pcf8523_rtc_ops, THIS_MODULE); + if (IS_ERR(pcf->rtc)) + return PTR_ERR(pcf->rtc); + + i2c_set_clientdata(client, pcf); + + return 0; +} + +static const struct i2c_device_id pcf8523_id[] = { + { "pcf8523", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pcf8523_id); + +#ifdef CONFIG_OF +static const struct of_device_id pcf8523_of_match[] = { + { .compatible = "nxp,pcf8523" }, + { } +}; +MODULE_DEVICE_TABLE(of, pcf8523_of_match); +#endif + +static struct i2c_driver pcf8523_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(pcf8523_of_match), + }, + .probe = pcf8523_probe, + .id_table = pcf8523_id, +}; +module_i2c_driver(pcf8523_driver); + +MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>"); +MODULE_DESCRIPTION("NXP PCF8523 RTC driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index b42c0c67926..63b558c4819 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -18,6 +18,9 @@ #include <linux/bcd.h> #include <linux/rtc.h> #include <linux/slab.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/err.h> #define DRV_VERSION "0.4.3" @@ -63,6 +66,7 @@ struct pcf8563 { * 1970...2069. */ int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */ + int voltage_low; /* incicates if a low_voltage was detected */ }; /* @@ -75,8 +79,17 @@ static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm) unsigned char buf[13] = { PCF8563_REG_ST1 }; struct i2c_msg msgs[] = { - { client->addr, 0, 1, buf }, /* setup read ptr */ - { client->addr, I2C_M_RD, 13, buf }, /* read status + date */ + {/* setup read ptr */ + .addr = client->addr, + .len = 1, + .buf = buf + }, + {/* read status + date */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 13, + .buf = buf + }, }; /* read registers */ @@ -85,9 +98,11 @@ static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm) return -EIO; } - if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) + if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) { + pcf8563->voltage_low = 1; dev_info(&client->dev, "low voltage detected, date/time is not reliable.\n"); + } dev_dbg(&client->dev, "%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, " @@ -167,11 +182,49 @@ static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm) __func__, err, data[0], data[1]); return -EIO; } - }; + } return 0; } +#ifdef CONFIG_RTC_INTF_DEV +static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev)); + struct rtc_time tm; + + switch (cmd) { + case RTC_VL_READ: + if (pcf8563->voltage_low) + dev_info(dev, "low voltage detected, date/time is not reliable.\n"); + + if (copy_to_user((void __user *)arg, &pcf8563->voltage_low, + sizeof(int))) + return -EFAULT; + return 0; + case RTC_VL_CLR: + /* + * Clear the VL bit in the seconds register in case + * the time has not been set already (which would + * have cleared it). This does not really matter + * because of the cached voltage_low value but do it + * anyway for consistency. + */ + if (pcf8563_get_datetime(to_i2c_client(dev), &tm)) + pcf8563_set_datetime(to_i2c_client(dev), &tm); + + /* Clear the cached value. */ + pcf8563->voltage_low = 0; + + return 0; + default: + return -ENOIOCTLCMD; + } +} +#else +#define pcf8563_rtc_ioctl NULL +#endif + static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm) { return pcf8563_get_datetime(to_i2c_client(dev), tm); @@ -183,6 +236,7 @@ static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm) } static const struct rtc_class_ops pcf8563_rtc_ops = { + .ioctl = pcf8563_rtc_ioctl, .read_time = pcf8563_rtc_read_time, .set_time = pcf8563_rtc_set_time, }; @@ -192,14 +246,13 @@ static int pcf8563_probe(struct i2c_client *client, { struct pcf8563 *pcf8563; - int err = 0; - dev_dbg(&client->dev, "%s\n", __func__); if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -ENODEV; - pcf8563 = kzalloc(sizeof(struct pcf8563), GFP_KERNEL); + pcf8563 = devm_kzalloc(&client->dev, sizeof(struct pcf8563), + GFP_KERNEL); if (!pcf8563) return -ENOMEM; @@ -207,32 +260,11 @@ static int pcf8563_probe(struct i2c_client *client, i2c_set_clientdata(client, pcf8563); - pcf8563->rtc = rtc_device_register(pcf8563_driver.driver.name, - &client->dev, &pcf8563_rtc_ops, THIS_MODULE); + pcf8563->rtc = devm_rtc_device_register(&client->dev, + pcf8563_driver.driver.name, + &pcf8563_rtc_ops, THIS_MODULE); - if (IS_ERR(pcf8563->rtc)) { - err = PTR_ERR(pcf8563->rtc); - goto exit_kfree; - } - - return 0; - -exit_kfree: - kfree(pcf8563); - - return err; -} - -static int pcf8563_remove(struct i2c_client *client) -{ - struct pcf8563 *pcf8563 = i2c_get_clientdata(client); - - if (pcf8563->rtc) - rtc_device_unregister(pcf8563->rtc); - - kfree(pcf8563); - - return 0; + return PTR_ERR_OR_ZERO(pcf8563->rtc); } static const struct i2c_device_id pcf8563_id[] = { @@ -242,29 +274,27 @@ static const struct i2c_device_id pcf8563_id[] = { }; MODULE_DEVICE_TABLE(i2c, pcf8563_id); +#ifdef CONFIG_OF +static const struct of_device_id pcf8563_of_match[] = { + { .compatible = "nxp,pcf8563" }, + {} +}; +MODULE_DEVICE_TABLE(of, pcf8563_of_match); +#endif + static struct i2c_driver pcf8563_driver = { .driver = { .name = "rtc-pcf8563", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(pcf8563_of_match), }, .probe = pcf8563_probe, - .remove = pcf8563_remove, .id_table = pcf8563_id, }; -static int __init pcf8563_init(void) -{ - return i2c_add_driver(&pcf8563_driver); -} - -static void __exit pcf8563_exit(void) -{ - i2c_del_driver(&pcf8563_driver); -} +module_i2c_driver(pcf8563_driver); MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(pcf8563_init); -module_exit(pcf8563_exit); diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c index 2d201afead3..c2639845186 100644 --- a/drivers/rtc/rtc-pcf8583.c +++ b/drivers/rtc/rtc-pcf8583.c @@ -17,6 +17,7 @@ #include <linux/slab.h> #include <linux/rtc.h> #include <linux/init.h> +#include <linux/err.h> #include <linux/errno.h> #include <linux/bcd.h> @@ -185,10 +186,11 @@ static int pcf8583_rtc_read_time(struct device *dev, struct rtc_time *tm) if (ctrl & (CTRL_STOP | CTRL_HOLD)) { unsigned char new_ctrl = ctrl & ~(CTRL_STOP | CTRL_HOLD); - printk(KERN_WARNING "RTC: resetting control %02x -> %02x\n", - ctrl, new_ctrl); + dev_warn(dev, "resetting control %02x -> %02x\n", + ctrl, new_ctrl); - if ((err = pcf8583_set_ctrl(client, &new_ctrl)) < 0) + err = pcf8583_set_ctrl(client, &new_ctrl); + if (err < 0) return err; } @@ -268,40 +270,22 @@ static int pcf8583_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct pcf8583 *pcf8583; - int err; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -ENODEV; - pcf8583 = kzalloc(sizeof(struct pcf8583), GFP_KERNEL); + pcf8583 = devm_kzalloc(&client->dev, sizeof(struct pcf8583), + GFP_KERNEL); if (!pcf8583) return -ENOMEM; i2c_set_clientdata(client, pcf8583); - pcf8583->rtc = rtc_device_register(pcf8583_driver.driver.name, - &client->dev, &pcf8583_rtc_ops, THIS_MODULE); + pcf8583->rtc = devm_rtc_device_register(&client->dev, + pcf8583_driver.driver.name, + &pcf8583_rtc_ops, THIS_MODULE); - if (IS_ERR(pcf8583->rtc)) { - err = PTR_ERR(pcf8583->rtc); - goto exit_kfree; - } - - return 0; - -exit_kfree: - kfree(pcf8583); - return err; -} - -static int __devexit pcf8583_remove(struct i2c_client *client) -{ - struct pcf8583 *pcf8583 = i2c_get_clientdata(client); - - if (pcf8583->rtc) - rtc_device_unregister(pcf8583->rtc); - kfree(pcf8583); - return 0; + return PTR_ERR_OR_ZERO(pcf8583->rtc); } static const struct i2c_device_id pcf8583_id[] = { @@ -316,22 +300,10 @@ static struct i2c_driver pcf8583_driver = { .owner = THIS_MODULE, }, .probe = pcf8583_probe, - .remove = __devexit_p(pcf8583_remove), .id_table = pcf8583_id, }; -static __init int pcf8583_init(void) -{ - return i2c_add_driver(&pcf8583_driver); -} - -static __exit void pcf8583_exit(void) -{ - i2c_del_driver(&pcf8583_driver); -} - -module_init(pcf8583_init); -module_exit(pcf8583_exit); +module_i2c_driver(pcf8583_driver); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("PCF8583 I2C RTC driver"); diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c index bbdb2f02798..f85a1a93e66 100644 --- a/drivers/rtc/rtc-pl030.c +++ b/drivers/rtc/rtc-pl030.c @@ -35,11 +35,6 @@ static irqreturn_t pl030_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static int pl030_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) -{ - return -ENOIOCTLCMD; -} - static int pl030_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pl030_rtc *rtc = dev_get_drvdata(dev); @@ -96,14 +91,13 @@ static int pl030_set_time(struct device *dev, struct rtc_time *tm) } static const struct rtc_class_ops pl030_ops = { - .ioctl = pl030_ioctl, .read_time = pl030_read_time, .set_time = pl030_set_time, .read_alarm = pl030_read_alarm, .set_alarm = pl030_set_alarm, }; -static int pl030_probe(struct amba_device *dev, struct amba_id *id) +static int pl030_probe(struct amba_device *dev, const struct amba_id *id) { struct pl030_rtc *rtc; int ret; @@ -112,7 +106,7 @@ static int pl030_probe(struct amba_device *dev, struct amba_id *id) if (ret) goto err_req; - rtc = kmalloc(sizeof(*rtc), GFP_KERNEL); + rtc = devm_kzalloc(&dev->dev, sizeof(*rtc), GFP_KERNEL); if (!rtc) { ret = -ENOMEM; goto err_rtc; @@ -121,7 +115,7 @@ static int pl030_probe(struct amba_device *dev, struct amba_id *id) rtc->base = ioremap(dev->res.start, resource_size(&dev->res)); if (!rtc->base) { ret = -ENOMEM; - goto err_map; + goto err_rtc; } __raw_writel(0, rtc->base + RTC_CR); @@ -129,7 +123,7 @@ static int pl030_probe(struct amba_device *dev, struct amba_id *id) amba_set_drvdata(dev, rtc); - ret = request_irq(dev->irq[0], pl030_interrupt, IRQF_DISABLED, + ret = request_irq(dev->irq[0], pl030_interrupt, 0, "rtc-pl030", rtc); if (ret) goto err_irq; @@ -147,8 +141,6 @@ static int pl030_probe(struct amba_device *dev, struct amba_id *id) free_irq(dev->irq[0], rtc); err_irq: iounmap(rtc->base); - err_map: - kfree(rtc); err_rtc: amba_release_regions(dev); err_req: @@ -159,14 +151,11 @@ static int pl030_remove(struct amba_device *dev) { struct pl030_rtc *rtc = amba_get_drvdata(dev); - amba_set_drvdata(dev, NULL); - writel(0, rtc->base + RTC_CR); free_irq(dev->irq[0], rtc); rtc_device_unregister(rtc->rtc); iounmap(rtc->base); - kfree(rtc); amba_release_regions(dev); return 0; @@ -180,6 +169,8 @@ static struct amba_id pl030_ids[] = { { 0, 0 }, }; +MODULE_DEVICE_TABLE(amba, pl030_ids); + static struct amba_driver pl030_driver = { .drv = { .name = "rtc-pl030", @@ -189,18 +180,7 @@ static struct amba_driver pl030_driver = { .id_table = pl030_ids, }; -static int __init pl030_init(void) -{ - return amba_driver_register(&pl030_driver); -} - -static void __exit pl030_exit(void) -{ - amba_driver_unregister(&pl030_driver); -} - -module_init(pl030_init); -module_exit(pl030_exit); +module_amba_driver(pl030_driver); MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); MODULE_DESCRIPTION("ARM AMBA PL030 RTC Driver"); diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index b7a6690e5b3..99181fff88f 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -44,6 +44,7 @@ #define RTC_YMR 0x34 /* Year match register */ #define RTC_YLR 0x38 /* Year data load register */ +#define RTC_CR_EN (1 << 0) /* counter enable bit */ #define RTC_CR_CWEN (1 << 26) /* Clockwatch enable bit */ #define RTC_TCR_EN (1 << 1) /* Periodic timer enable bit */ @@ -68,11 +69,26 @@ #define RTC_TIMER_FREQ 32768 +/** + * struct pl031_vendor_data - per-vendor variations + * @ops: the vendor-specific operations used on this silicon version + * @clockwatch: if this is an ST Microelectronics silicon version with a + * clockwatch function + * @st_weekday: if this is an ST Microelectronics silicon version that need + * the weekday fix + * @irqflags: special IRQ flags per variant + */ +struct pl031_vendor_data { + struct rtc_class_ops ops; + bool clockwatch; + bool st_weekday; + unsigned long irqflags; +}; + struct pl031_local { + struct pl031_vendor_data *vendor; struct rtc_device *rtc; void __iomem *base; - u8 hw_designer; - u8 hw_revision:4; }; static int pl031_alarm_irq_enable(struct device *dev, @@ -220,17 +236,9 @@ static irqreturn_t pl031_interrupt(int irq, void *dev_id) unsigned long events = 0; rtcmis = readl(ldata->base + RTC_MIS); - if (rtcmis) { - writel(rtcmis, ldata->base + RTC_ICR); - - if (rtcmis & RTC_BIT_AI) - events |= (RTC_AF | RTC_IRQF); - - /* Timer interrupt is only available in ST variants */ - if ((rtcmis & RTC_BIT_PI) && - (ldata->hw_designer == AMBA_VENDOR_ST)) - events |= (RTC_PF | RTC_IRQF); - + if (rtcmis & RTC_BIT_AI) { + writel(RTC_BIT_AI, ldata->base + RTC_ICR); + events |= (RTC_AF | RTC_IRQF); rtc_update_irq(ldata->rtc, 1, events); return IRQ_HANDLED; @@ -293,63 +301,11 @@ static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) return ret; } -/* Periodic interrupt is only available in ST variants. */ -static int pl031_irq_set_state(struct device *dev, int enabled) -{ - struct pl031_local *ldata = dev_get_drvdata(dev); - - if (enabled == 1) { - /* Clear any pending timer interrupt. */ - writel(RTC_BIT_PI, ldata->base + RTC_ICR); - - writel(readl(ldata->base + RTC_IMSC) | RTC_BIT_PI, - ldata->base + RTC_IMSC); - - /* Now start the timer */ - writel(readl(ldata->base + RTC_TCR) | RTC_TCR_EN, - ldata->base + RTC_TCR); - - } else { - writel(readl(ldata->base + RTC_IMSC) & (~RTC_BIT_PI), - ldata->base + RTC_IMSC); - - /* Also stop the timer */ - writel(readl(ldata->base + RTC_TCR) & (~RTC_TCR_EN), - ldata->base + RTC_TCR); - } - /* Wait at least 1 RTC32 clock cycle to ensure next access - * to RTC_TCR will succeed. - */ - udelay(40); - - return 0; -} - -static int pl031_irq_set_freq(struct device *dev, int freq) -{ - struct pl031_local *ldata = dev_get_drvdata(dev); - - /* Cant set timer if it is already enabled */ - if (readl(ldata->base + RTC_TCR) & RTC_TCR_EN) { - dev_err(dev, "can't change frequency while timer enabled\n"); - return -EINVAL; - } - - /* If self start bit in RTC_TCR is set timer will start here, - * but we never set that bit. Instead we start the timer when - * set_state is called with enabled == 1. - */ - writel(RTC_TIMER_FREQ / freq, ldata->base + RTC_TLR); - - return 0; -} - static int pl031_remove(struct amba_device *adev) { struct pl031_local *ldata = dev_get_drvdata(&adev->dev); - amba_set_drvdata(adev, NULL); - free_irq(adev->irq[0], ldata->rtc); + free_irq(adev->irq[0], ldata); rtc_device_unregister(ldata->rtc); iounmap(ldata->base); kfree(ldata); @@ -358,11 +314,13 @@ static int pl031_remove(struct amba_device *adev) return 0; } -static int pl031_probe(struct amba_device *adev, struct amba_id *id) +static int pl031_probe(struct amba_device *adev, const struct amba_id *id) { int ret; struct pl031_local *ldata; - struct rtc_class_ops *ops = id->data; + struct pl031_vendor_data *vendor = id->data; + struct rtc_class_ops *ops = &vendor->ops; + unsigned long time, data; ret = amba_request_regions(adev, NULL); if (ret) @@ -373,6 +331,7 @@ static int pl031_probe(struct amba_device *adev, struct amba_id *id) ret = -ENOMEM; goto out; } + ldata->vendor = vendor; ldata->base = ioremap(adev->res.start, resource_size(&adev->res)); @@ -383,18 +342,35 @@ static int pl031_probe(struct amba_device *adev, struct amba_id *id) amba_set_drvdata(adev, ldata); - ldata->hw_designer = amba_manf(adev); - ldata->hw_revision = amba_rev(adev); - - dev_dbg(&adev->dev, "designer ID = 0x%02x\n", ldata->hw_designer); - dev_dbg(&adev->dev, "revision = 0x%01x\n", ldata->hw_revision); + dev_dbg(&adev->dev, "designer ID = 0x%02x\n", amba_manf(adev)); + dev_dbg(&adev->dev, "revision = 0x%01x\n", amba_rev(adev)); + data = readl(ldata->base + RTC_CR); /* Enable the clockwatch on ST Variants */ - if ((ldata->hw_designer == AMBA_VENDOR_ST) && - (ldata->hw_revision > 1)) - writel(readl(ldata->base + RTC_CR) | RTC_CR_CWEN, - ldata->base + RTC_CR); + if (vendor->clockwatch) + data |= RTC_CR_CWEN; + else + data |= RTC_CR_EN; + writel(data, ldata->base + RTC_CR); + + /* + * On ST PL031 variants, the RTC reset value does not provide correct + * weekday for 2000-01-01. Correct the erroneous sunday to saturday. + */ + if (vendor->st_weekday) { + if (readl(ldata->base + RTC_YDR) == 0x2000) { + time = readl(ldata->base + RTC_DR); + if ((time & + (RTC_MON_MASK | RTC_MDAY_MASK | RTC_WDAY_MASK)) + == 0x02120000) { + time = time | (0x7 << RTC_WDAY_SHIFT); + writel(0x2000, ldata->base + RTC_YLR); + writel(time, ldata->base + RTC_LR); + } + } + } + device_init_wakeup(&adev->dev, 1); ldata->rtc = rtc_device_register("pl031", &adev->dev, ops, THIS_MODULE); if (IS_ERR(ldata->rtc)) { @@ -403,7 +379,7 @@ static int pl031_probe(struct amba_device *adev, struct amba_id *id) } if (request_irq(adev->irq[0], pl031_interrupt, - IRQF_DISABLED, "rtc-pl031", ldata)) { + vendor->irqflags, "rtc-pl031", ldata)) { ret = -EIO; goto out_no_irq; } @@ -414,7 +390,6 @@ out_no_irq: rtc_device_unregister(ldata->rtc); out_no_rtc: iounmap(ldata->base); - amba_set_drvdata(adev, NULL); out_no_remap: kfree(ldata); out: @@ -425,56 +400,71 @@ err_req: } /* Operations for the original ARM version */ -static struct rtc_class_ops arm_pl031_ops = { - .read_time = pl031_read_time, - .set_time = pl031_set_time, - .read_alarm = pl031_read_alarm, - .set_alarm = pl031_set_alarm, - .alarm_irq_enable = pl031_alarm_irq_enable, +static struct pl031_vendor_data arm_pl031 = { + .ops = { + .read_time = pl031_read_time, + .set_time = pl031_set_time, + .read_alarm = pl031_read_alarm, + .set_alarm = pl031_set_alarm, + .alarm_irq_enable = pl031_alarm_irq_enable, + }, + .irqflags = IRQF_NO_SUSPEND, }; /* The First ST derivative */ -static struct rtc_class_ops stv1_pl031_ops = { - .read_time = pl031_read_time, - .set_time = pl031_set_time, - .read_alarm = pl031_read_alarm, - .set_alarm = pl031_set_alarm, - .alarm_irq_enable = pl031_alarm_irq_enable, - .irq_set_state = pl031_irq_set_state, - .irq_set_freq = pl031_irq_set_freq, +static struct pl031_vendor_data stv1_pl031 = { + .ops = { + .read_time = pl031_read_time, + .set_time = pl031_set_time, + .read_alarm = pl031_read_alarm, + .set_alarm = pl031_set_alarm, + .alarm_irq_enable = pl031_alarm_irq_enable, + }, + .clockwatch = true, + .st_weekday = true, + .irqflags = IRQF_NO_SUSPEND, }; /* And the second ST derivative */ -static struct rtc_class_ops stv2_pl031_ops = { - .read_time = pl031_stv2_read_time, - .set_time = pl031_stv2_set_time, - .read_alarm = pl031_stv2_read_alarm, - .set_alarm = pl031_stv2_set_alarm, - .alarm_irq_enable = pl031_alarm_irq_enable, - .irq_set_state = pl031_irq_set_state, - .irq_set_freq = pl031_irq_set_freq, +static struct pl031_vendor_data stv2_pl031 = { + .ops = { + .read_time = pl031_stv2_read_time, + .set_time = pl031_stv2_set_time, + .read_alarm = pl031_stv2_read_alarm, + .set_alarm = pl031_stv2_set_alarm, + .alarm_irq_enable = pl031_alarm_irq_enable, + }, + .clockwatch = true, + .st_weekday = true, + /* + * This variant shares the IRQ with another block and must not + * suspend that IRQ line. + */ + .irqflags = IRQF_SHARED | IRQF_NO_SUSPEND, }; static struct amba_id pl031_ids[] = { { .id = 0x00041031, .mask = 0x000fffff, - .data = &arm_pl031_ops, + .data = &arm_pl031, }, /* ST Micro variants */ { .id = 0x00180031, .mask = 0x00ffffff, - .data = &stv1_pl031_ops, + .data = &stv1_pl031, }, { .id = 0x00280031, .mask = 0x00ffffff, - .data = &stv2_pl031_ops, + .data = &stv2_pl031, }, {0, 0}, }; +MODULE_DEVICE_TABLE(amba, pl031_ids); + static struct amba_driver pl031_driver = { .drv = { .name = "rtc-pl031", @@ -484,18 +474,7 @@ static struct amba_driver pl031_driver = { .remove = pl031_remove, }; -static int __init pl031_init(void) -{ - return amba_driver_register(&pl031_driver); -} - -static void __exit pl031_exit(void) -{ - amba_driver_unregister(&pl031_driver); -} - -module_init(pl031_init); -module_exit(pl031_exit); +module_amba_driver(pl031_driver); MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net"); MODULE_DESCRIPTION("ARM AMBA PL031 RTC Driver"); diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c new file mode 100644 index 00000000000..197699f358c --- /dev/null +++ b/drivers/rtc/rtc-pm8xxx.c @@ -0,0 +1,499 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include <linux/of.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +/* RTC Register offsets from RTC CTRL REG */ +#define PM8XXX_ALARM_CTRL_OFFSET 0x01 +#define PM8XXX_RTC_WRITE_OFFSET 0x02 +#define PM8XXX_RTC_READ_OFFSET 0x06 +#define PM8XXX_ALARM_RW_OFFSET 0x0A + +/* RTC_CTRL register bit fields */ +#define PM8xxx_RTC_ENABLE BIT(7) +#define PM8xxx_RTC_ALARM_ENABLE BIT(1) +#define PM8xxx_RTC_ALARM_CLEAR BIT(0) + +#define NUM_8_BIT_RTC_REGS 0x4 + +/** + * struct pm8xxx_rtc - rtc driver internal structure + * @rtc: rtc device for this driver. + * @regmap: regmap used to access RTC registers + * @allow_set_time: indicates whether writing to the RTC is allowed + * @rtc_alarm_irq: rtc alarm irq number. + * @rtc_base: address of rtc control register. + * @rtc_read_base: base address of read registers. + * @rtc_write_base: base address of write registers. + * @alarm_rw_base: base address of alarm registers. + * @ctrl_reg: rtc control register. + * @rtc_dev: device structure. + * @ctrl_reg_lock: spinlock protecting access to ctrl_reg. + */ +struct pm8xxx_rtc { + struct rtc_device *rtc; + struct regmap *regmap; + bool allow_set_time; + int rtc_alarm_irq; + int rtc_base; + int rtc_read_base; + int rtc_write_base; + int alarm_rw_base; + u8 ctrl_reg; + struct device *rtc_dev; + spinlock_t ctrl_reg_lock; +}; + +/* + * Steps to write the RTC registers. + * 1. Disable alarm if enabled. + * 2. Write 0x00 to LSB. + * 3. Write Byte[1], Byte[2], Byte[3] then Byte[0]. + * 4. Enable alarm if disabled in step 1. + */ +static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + int rc, i; + unsigned long secs, irq_flags; + u8 value[NUM_8_BIT_RTC_REGS], alarm_enabled = 0, ctrl_reg; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + if (!rtc_dd->allow_set_time) + return -EACCES; + + rtc_tm_to_time(tm, &secs); + + for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { + value[i] = secs & 0xFF; + secs >>= 8; + } + + dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs); + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + ctrl_reg = rtc_dd->ctrl_reg; + + if (ctrl_reg & PM8xxx_RTC_ALARM_ENABLE) { + alarm_enabled = 1; + ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_base, ctrl_reg); + if (rc) { + dev_err(dev, "Write to RTC control register failed\n"); + goto rtc_rw_fail; + } + rtc_dd->ctrl_reg = ctrl_reg; + } else { + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + } + + /* Write 0 to Byte[0] */ + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_write_base, 0); + if (rc) { + dev_err(dev, "Write to RTC write data register failed\n"); + goto rtc_rw_fail; + } + + /* Write Byte[1], Byte[2], Byte[3] */ + rc = regmap_bulk_write(rtc_dd->regmap, rtc_dd->rtc_write_base + 1, + &value[1], sizeof(value) - 1); + if (rc) { + dev_err(dev, "Write to RTC write data register failed\n"); + goto rtc_rw_fail; + } + + /* Write Byte[0] */ + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_write_base, value[0]); + if (rc) { + dev_err(dev, "Write to RTC write data register failed\n"); + goto rtc_rw_fail; + } + + if (alarm_enabled) { + ctrl_reg |= PM8xxx_RTC_ALARM_ENABLE; + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_base, ctrl_reg); + if (rc) { + dev_err(dev, "Write to RTC control register failed\n"); + goto rtc_rw_fail; + } + rtc_dd->ctrl_reg = ctrl_reg; + } + +rtc_rw_fail: + if (alarm_enabled) + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + + return rc; +} + +static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + int rc; + u8 value[NUM_8_BIT_RTC_REGS]; + unsigned long secs; + unsigned int reg; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rc = regmap_bulk_read(rtc_dd->regmap, rtc_dd->rtc_read_base, + value, sizeof(value)); + if (rc) { + dev_err(dev, "RTC read data register failed\n"); + return rc; + } + + /* + * Read the LSB again and check if there has been a carry over. + * If there is, redo the read operation. + */ + rc = regmap_read(rtc_dd->regmap, rtc_dd->rtc_read_base, ®); + if (rc < 0) { + dev_err(dev, "RTC read data register failed\n"); + return rc; + } + + if (unlikely(reg < value[0])) { + rc = regmap_bulk_read(rtc_dd->regmap, rtc_dd->rtc_read_base, + value, sizeof(value)); + if (rc) { + dev_err(dev, "RTC read data register failed\n"); + return rc; + } + } + + secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); + + rtc_time_to_tm(secs, tm); + + rc = rtc_valid_tm(tm); + if (rc < 0) { + dev_err(dev, "Invalid time read from RTC\n"); + return rc; + } + + dev_dbg(dev, "secs = %lu, h:m:s == %d:%d:%d, d/m/y = %d/%d/%d\n", + secs, tm->tm_hour, tm->tm_min, tm->tm_sec, + tm->tm_mday, tm->tm_mon, tm->tm_year); + + return 0; +} + +static int pm8xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int rc, i; + u8 value[NUM_8_BIT_RTC_REGS], ctrl_reg; + unsigned long secs, irq_flags; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rtc_tm_to_time(&alarm->time, &secs); + + for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { + value[i] = secs & 0xFF; + secs >>= 8; + } + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + + rc = regmap_bulk_write(rtc_dd->regmap, rtc_dd->alarm_rw_base, value, + sizeof(value)); + if (rc) { + dev_err(dev, "Write to RTC ALARM register failed\n"); + goto rtc_rw_fail; + } + + ctrl_reg = rtc_dd->ctrl_reg; + + if (alarm->enabled) + ctrl_reg |= PM8xxx_RTC_ALARM_ENABLE; + else + ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; + + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_base, ctrl_reg); + if (rc) { + dev_err(dev, "Write to RTC control register failed\n"); + goto rtc_rw_fail; + } + + rtc_dd->ctrl_reg = ctrl_reg; + + dev_dbg(dev, "Alarm Set for h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", + alarm->time.tm_hour, alarm->time.tm_min, + alarm->time.tm_sec, alarm->time.tm_mday, + alarm->time.tm_mon, alarm->time.tm_year); +rtc_rw_fail: + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + return rc; +} + +static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int rc; + u8 value[NUM_8_BIT_RTC_REGS]; + unsigned long secs; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rc = regmap_bulk_read(rtc_dd->regmap, rtc_dd->alarm_rw_base, value, + sizeof(value)); + if (rc) { + dev_err(dev, "RTC alarm time read failed\n"); + return rc; + } + + secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); + + rtc_time_to_tm(secs, &alarm->time); + + rc = rtc_valid_tm(&alarm->time); + if (rc < 0) { + dev_err(dev, "Invalid alarm time read from RTC\n"); + return rc; + } + + dev_dbg(dev, "Alarm set for - h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", + alarm->time.tm_hour, alarm->time.tm_min, + alarm->time.tm_sec, alarm->time.tm_mday, + alarm->time.tm_mon, alarm->time.tm_year); + + return 0; +} + +static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + int rc; + unsigned long irq_flags; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + u8 ctrl_reg; + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + + ctrl_reg = rtc_dd->ctrl_reg; + + if (enable) + ctrl_reg |= PM8xxx_RTC_ALARM_ENABLE; + else + ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; + + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_base, ctrl_reg); + if (rc) { + dev_err(dev, "Write to RTC control register failed\n"); + goto rtc_rw_fail; + } + + rtc_dd->ctrl_reg = ctrl_reg; + +rtc_rw_fail: + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + return rc; +} + +static const struct rtc_class_ops pm8xxx_rtc_ops = { + .read_time = pm8xxx_rtc_read_time, + .set_time = pm8xxx_rtc_set_time, + .set_alarm = pm8xxx_rtc_set_alarm, + .read_alarm = pm8xxx_rtc_read_alarm, + .alarm_irq_enable = pm8xxx_rtc_alarm_irq_enable, +}; + +static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) +{ + struct pm8xxx_rtc *rtc_dd = dev_id; + unsigned int ctrl_reg; + int rc; + unsigned long irq_flags; + + rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF); + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + + /* Clear the alarm enable bit */ + ctrl_reg = rtc_dd->ctrl_reg; + ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; + + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_base, ctrl_reg); + if (rc) { + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + dev_err(rtc_dd->rtc_dev, + "Write to RTC control register failed\n"); + goto rtc_alarm_handled; + } + + rtc_dd->ctrl_reg = ctrl_reg; + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + + /* Clear RTC alarm register */ + rc = regmap_read(rtc_dd->regmap, + rtc_dd->rtc_base + PM8XXX_ALARM_CTRL_OFFSET, + &ctrl_reg); + if (rc) { + dev_err(rtc_dd->rtc_dev, + "RTC Alarm control register read failed\n"); + goto rtc_alarm_handled; + } + + ctrl_reg &= ~PM8xxx_RTC_ALARM_CLEAR; + rc = regmap_write(rtc_dd->regmap, + rtc_dd->rtc_base + PM8XXX_ALARM_CTRL_OFFSET, + ctrl_reg); + if (rc) + dev_err(rtc_dd->rtc_dev, + "Write to RTC Alarm control register failed\n"); + +rtc_alarm_handled: + return IRQ_HANDLED; +} + +/* + * Hardcoded RTC bases until IORESOURCE_REG mapping is figured out + */ +static const struct of_device_id pm8xxx_id_table[] = { + { .compatible = "qcom,pm8921-rtc", .data = (void *) 0x11D }, + { .compatible = "qcom,pm8058-rtc", .data = (void *) 0x1E8 }, + { }, +}; +MODULE_DEVICE_TABLE(of, pm8xxx_id_table); + +static int pm8xxx_rtc_probe(struct platform_device *pdev) +{ + int rc; + unsigned int ctrl_reg; + struct pm8xxx_rtc *rtc_dd; + const struct of_device_id *match; + + match = of_match_node(pm8xxx_id_table, pdev->dev.of_node); + if (!match) + return -ENXIO; + + rtc_dd = devm_kzalloc(&pdev->dev, sizeof(*rtc_dd), GFP_KERNEL); + if (rtc_dd == NULL) + return -ENOMEM; + + /* Initialise spinlock to protect RTC control register */ + spin_lock_init(&rtc_dd->ctrl_reg_lock); + + rtc_dd->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!rtc_dd->regmap) { + dev_err(&pdev->dev, "Parent regmap unavailable.\n"); + return -ENXIO; + } + + rtc_dd->rtc_alarm_irq = platform_get_irq(pdev, 0); + if (rtc_dd->rtc_alarm_irq < 0) { + dev_err(&pdev->dev, "Alarm IRQ resource absent!\n"); + return -ENXIO; + } + + rtc_dd->allow_set_time = of_property_read_bool(pdev->dev.of_node, + "allow-set-time"); + + rtc_dd->rtc_base = (long) match->data; + + /* Setup RTC register addresses */ + rtc_dd->rtc_write_base = rtc_dd->rtc_base + PM8XXX_RTC_WRITE_OFFSET; + rtc_dd->rtc_read_base = rtc_dd->rtc_base + PM8XXX_RTC_READ_OFFSET; + rtc_dd->alarm_rw_base = rtc_dd->rtc_base + PM8XXX_ALARM_RW_OFFSET; + + rtc_dd->rtc_dev = &pdev->dev; + + /* Check if the RTC is on, else turn it on */ + rc = regmap_read(rtc_dd->regmap, rtc_dd->rtc_base, &ctrl_reg); + if (rc) { + dev_err(&pdev->dev, "RTC control register read failed!\n"); + return rc; + } + + if (!(ctrl_reg & PM8xxx_RTC_ENABLE)) { + ctrl_reg |= PM8xxx_RTC_ENABLE; + rc = regmap_write(rtc_dd->regmap, rtc_dd->rtc_base, ctrl_reg); + if (rc) { + dev_err(&pdev->dev, + "Write to RTC control register failed\n"); + return rc; + } + } + + rtc_dd->ctrl_reg = ctrl_reg; + + platform_set_drvdata(pdev, rtc_dd); + + device_init_wakeup(&pdev->dev, 1); + + /* Register the RTC device */ + rtc_dd->rtc = devm_rtc_device_register(&pdev->dev, "pm8xxx_rtc", + &pm8xxx_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc_dd->rtc)) { + dev_err(&pdev->dev, "%s: RTC registration failed (%ld)\n", + __func__, PTR_ERR(rtc_dd->rtc)); + return PTR_ERR(rtc_dd->rtc); + } + + /* Request the alarm IRQ */ + rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->rtc_alarm_irq, + pm8xxx_alarm_trigger, + IRQF_TRIGGER_RISING, + "pm8xxx_rtc_alarm", rtc_dd); + if (rc < 0) { + dev_err(&pdev->dev, "Request IRQ failed (%d)\n", rc); + return rc; + } + + dev_dbg(&pdev->dev, "Probe success !!\n"); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int pm8xxx_rtc_resume(struct device *dev) +{ + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(rtc_dd->rtc_alarm_irq); + + return 0; +} + +static int pm8xxx_rtc_suspend(struct device *dev) +{ + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(rtc_dd->rtc_alarm_irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(pm8xxx_rtc_pm_ops, + pm8xxx_rtc_suspend, + pm8xxx_rtc_resume); + +static struct platform_driver pm8xxx_rtc_driver = { + .probe = pm8xxx_rtc_probe, + .driver = { + .name = "rtc-pm8xxx", + .owner = THIS_MODULE, + .pm = &pm8xxx_rtc_pm_ops, + .of_match_table = pm8xxx_id_table, + }, +}; + +module_platform_driver(pm8xxx_rtc_driver); + +MODULE_ALIAS("platform:rtc-pm8xxx"); +MODULE_DESCRIPTION("PMIC8xxx RTC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Anirudh Ghayal <aghayal@codeaurora.org>"); diff --git a/drivers/rtc/rtc-proc.c b/drivers/rtc/rtc-proc.c index c086fc30a84..ffa69e1c924 100644 --- a/drivers/rtc/rtc-proc.c +++ b/drivers/rtc/rtc-proc.c @@ -18,6 +18,26 @@ #include "rtc-core.h" +#define NAME_SIZE 10 + +#if defined(CONFIG_RTC_HCTOSYS_DEVICE) +static bool is_rtc_hctosys(struct rtc_device *rtc) +{ + int size; + char name[NAME_SIZE]; + + size = scnprintf(name, NAME_SIZE, "rtc%d", rtc->id); + if (size > NAME_SIZE) + return false; + + return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE); +} +#else +static bool is_rtc_hctosys(struct rtc_device *rtc) +{ + return (rtc->id == 0); +} +#endif static int rtc_proc_show(struct seq_file *seq, void *offset) { @@ -69,6 +89,14 @@ static int rtc_proc_show(struct seq_file *seq, void *offset) alrm.enabled ? "yes" : "no"); seq_printf(seq, "alrm_pending\t: %s\n", alrm.pending ? "yes" : "no"); + seq_printf(seq, "update IRQ enabled\t: %s\n", + (rtc->uie_rtctimer.enabled) ? "yes" : "no"); + seq_printf(seq, "periodic IRQ enabled\t: %s\n", + (rtc->pie_enabled) ? "yes" : "no"); + seq_printf(seq, "periodic IRQ frequency\t: %d\n", + rtc->irq_freq); + seq_printf(seq, "max user IRQ frequency\t: %d\n", + rtc->max_user_freq); } seq_printf(seq, "24hr\t\t: yes\n"); @@ -81,12 +109,16 @@ static int rtc_proc_show(struct seq_file *seq, void *offset) static int rtc_proc_open(struct inode *inode, struct file *file) { - struct rtc_device *rtc = PDE(inode)->data; + int ret; + struct rtc_device *rtc = PDE_DATA(inode); if (!try_module_get(THIS_MODULE)) return -ENODEV; - return single_open(file, rtc_proc_show, rtc); + ret = single_open(file, rtc_proc_show, rtc); + if (ret) + module_put(THIS_MODULE); + return ret; } static int rtc_proc_release(struct inode *inode, struct file *file) @@ -105,12 +137,12 @@ static const struct file_operations rtc_proc_fops = { void rtc_proc_add_device(struct rtc_device *rtc) { - if (rtc->id == 0) + if (is_rtc_hctosys(rtc)) proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc); } void rtc_proc_del_device(struct rtc_device *rtc) { - if (rtc->id == 0) + if (is_rtc_hctosys(rtc)) remove_proc_entry("driver/rtc", NULL); } diff --git a/drivers/rtc/rtc-ps3.c b/drivers/rtc/rtc-ps3.c index 968133ce1ee..554ada5e9b7 100644 --- a/drivers/rtc/rtc-ps3.c +++ b/drivers/rtc/rtc-ps3.c @@ -62,7 +62,7 @@ static int __init ps3_rtc_probe(struct platform_device *dev) { struct rtc_device *rtc; - rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops, + rtc = devm_rtc_device_register(&dev->dev, "rtc-ps3", &ps3_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -71,32 +71,14 @@ static int __init ps3_rtc_probe(struct platform_device *dev) return 0; } -static int __exit ps3_rtc_remove(struct platform_device *dev) -{ - rtc_device_unregister(platform_get_drvdata(dev)); - return 0; -} - static struct platform_driver ps3_rtc_driver = { .driver = { .name = "rtc-ps3", .owner = THIS_MODULE, }, - .remove = __exit_p(ps3_rtc_remove), }; -static int __init ps3_rtc_init(void) -{ - return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe); -} - -static void __exit ps3_rtc_fini(void) -{ - platform_driver_unregister(&ps3_rtc_driver); -} - -module_init(ps3_rtc_init); -module_exit(ps3_rtc_fini); +module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe); MODULE_AUTHOR("Sony Corporation"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-puv3.c b/drivers/rtc/rtc-puv3.c new file mode 100644 index 00000000000..1cff2a21db6 --- /dev/null +++ b/drivers/rtc/rtc-puv3.c @@ -0,0 +1,340 @@ +/* + * RTC driver code specific to PKUnity SoC and UniCore ISA + * + * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> + * Copyright (C) 2001-2010 Guan Xuetao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/clk.h> +#include <linux/log2.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/io.h> + +#include <asm/irq.h> +#include <mach/hardware.h> + +static struct resource *puv3_rtc_mem; + +static int puv3_rtc_alarmno = IRQ_RTCAlarm; +static int puv3_rtc_tickno = IRQ_RTC; + +static DEFINE_SPINLOCK(puv3_rtc_pie_lock); + +/* IRQ Handlers */ +static irqreturn_t puv3_rtc_alarmirq(int irq, void *id) +{ + struct rtc_device *rdev = id; + + writel(readl(RTC_RTSR) | RTC_RTSR_AL, RTC_RTSR); + rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF); + return IRQ_HANDLED; +} + +static irqreturn_t puv3_rtc_tickirq(int irq, void *id) +{ + struct rtc_device *rdev = id; + + writel(readl(RTC_RTSR) | RTC_RTSR_HZ, RTC_RTSR); + rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF); + return IRQ_HANDLED; +} + +/* Update control registers */ +static void puv3_rtc_setaie(struct device *dev, int to) +{ + unsigned int tmp; + + dev_dbg(dev, "%s: aie=%d\n", __func__, to); + + tmp = readl(RTC_RTSR) & ~RTC_RTSR_ALE; + + if (to) + tmp |= RTC_RTSR_ALE; + + writel(tmp, RTC_RTSR); +} + +static int puv3_rtc_setpie(struct device *dev, int enabled) +{ + unsigned int tmp; + + dev_dbg(dev, "%s: pie=%d\n", __func__, enabled); + + spin_lock_irq(&puv3_rtc_pie_lock); + tmp = readl(RTC_RTSR) & ~RTC_RTSR_HZE; + + if (enabled) + tmp |= RTC_RTSR_HZE; + + writel(tmp, RTC_RTSR); + spin_unlock_irq(&puv3_rtc_pie_lock); + + return 0; +} + +/* Time read/write */ +static int puv3_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) +{ + rtc_time_to_tm(readl(RTC_RCNR), rtc_tm); + + dev_dbg(dev, "read time %02x.%02x.%02x %02x/%02x/%02x\n", + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, + rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); + + return 0; +} + +static int puv3_rtc_settime(struct device *dev, struct rtc_time *tm) +{ + unsigned long rtc_count = 0; + + dev_dbg(dev, "set time %02d.%02d.%02d %02d/%02d/%02d\n", + tm->tm_year, tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + rtc_tm_to_time(tm, &rtc_count); + writel(rtc_count, RTC_RCNR); + + return 0; +} + +static int puv3_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct rtc_time *alm_tm = &alrm->time; + + rtc_time_to_tm(readl(RTC_RTAR), alm_tm); + + alrm->enabled = readl(RTC_RTSR) & RTC_RTSR_ALE; + + dev_dbg(dev, "read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n", + alrm->enabled, + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday, + alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec); + + return 0; +} + +static int puv3_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct rtc_time *tm = &alrm->time; + unsigned long rtcalarm_count = 0; + + dev_dbg(dev, "puv3_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n", + alrm->enabled, + tm->tm_mday & 0xff, tm->tm_mon & 0xff, tm->tm_year & 0xff, + tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec); + + rtc_tm_to_time(tm, &rtcalarm_count); + writel(rtcalarm_count, RTC_RTAR); + + puv3_rtc_setaie(dev, alrm->enabled); + + if (alrm->enabled) + enable_irq_wake(puv3_rtc_alarmno); + else + disable_irq_wake(puv3_rtc_alarmno); + + return 0; +} + +static int puv3_rtc_proc(struct device *dev, struct seq_file *seq) +{ + seq_printf(seq, "periodic_IRQ\t: %s\n", + (readl(RTC_RTSR) & RTC_RTSR_HZE) ? "yes" : "no"); + return 0; +} + +static int puv3_rtc_open(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc_dev = platform_get_drvdata(pdev); + int ret; + + ret = request_irq(puv3_rtc_alarmno, puv3_rtc_alarmirq, + 0, "pkunity-rtc alarm", rtc_dev); + + if (ret) { + dev_err(dev, "IRQ%d error %d\n", puv3_rtc_alarmno, ret); + return ret; + } + + ret = request_irq(puv3_rtc_tickno, puv3_rtc_tickirq, + 0, "pkunity-rtc tick", rtc_dev); + + if (ret) { + dev_err(dev, "IRQ%d error %d\n", puv3_rtc_tickno, ret); + goto tick_err; + } + + return ret; + + tick_err: + free_irq(puv3_rtc_alarmno, rtc_dev); + return ret; +} + +static void puv3_rtc_release(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc_dev = platform_get_drvdata(pdev); + + /* do not clear AIE here, it may be needed for wake */ + puv3_rtc_setpie(dev, 0); + free_irq(puv3_rtc_alarmno, rtc_dev); + free_irq(puv3_rtc_tickno, rtc_dev); +} + +static const struct rtc_class_ops puv3_rtcops = { + .open = puv3_rtc_open, + .release = puv3_rtc_release, + .read_time = puv3_rtc_gettime, + .set_time = puv3_rtc_settime, + .read_alarm = puv3_rtc_getalarm, + .set_alarm = puv3_rtc_setalarm, + .proc = puv3_rtc_proc, +}; + +static void puv3_rtc_enable(struct device *dev, int en) +{ + if (!en) { + writel(readl(RTC_RTSR) & ~RTC_RTSR_HZE, RTC_RTSR); + } else { + /* re-enable the device, and check it is ok */ + if ((readl(RTC_RTSR) & RTC_RTSR_HZE) == 0) { + dev_info(dev, "rtc disabled, re-enabling\n"); + writel(readl(RTC_RTSR) | RTC_RTSR_HZE, RTC_RTSR); + } + } +} + +static int puv3_rtc_remove(struct platform_device *dev) +{ + struct rtc_device *rtc = platform_get_drvdata(dev); + + rtc_device_unregister(rtc); + + puv3_rtc_setpie(&dev->dev, 0); + puv3_rtc_setaie(&dev->dev, 0); + + release_resource(puv3_rtc_mem); + kfree(puv3_rtc_mem); + + return 0; +} + +static int puv3_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtc; + struct resource *res; + int ret; + + dev_dbg(&pdev->dev, "%s: probe=%p\n", __func__, pdev); + + /* find the IRQs */ + puv3_rtc_tickno = platform_get_irq(pdev, 1); + if (puv3_rtc_tickno < 0) { + dev_err(&pdev->dev, "no irq for rtc tick\n"); + return -ENOENT; + } + + puv3_rtc_alarmno = platform_get_irq(pdev, 0); + if (puv3_rtc_alarmno < 0) { + dev_err(&pdev->dev, "no irq for alarm\n"); + return -ENOENT; + } + + dev_dbg(&pdev->dev, "PKUnity_rtc: tick irq %d, alarm irq %d\n", + puv3_rtc_tickno, puv3_rtc_alarmno); + + /* get the memory region */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(&pdev->dev, "failed to get memory region resource\n"); + return -ENOENT; + } + + puv3_rtc_mem = request_mem_region(res->start, resource_size(res), + pdev->name); + + if (puv3_rtc_mem == NULL) { + dev_err(&pdev->dev, "failed to reserve memory region\n"); + ret = -ENOENT; + goto err_nores; + } + + puv3_rtc_enable(&pdev->dev, 1); + + /* register RTC and exit */ + rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops, + THIS_MODULE); + + if (IS_ERR(rtc)) { + dev_err(&pdev->dev, "cannot attach rtc\n"); + ret = PTR_ERR(rtc); + goto err_nortc; + } + + /* platform setup code should have handled this; sigh */ + if (!device_can_wakeup(&pdev->dev)) + device_init_wakeup(&pdev->dev, 1); + + platform_set_drvdata(pdev, rtc); + return 0; + + err_nortc: + puv3_rtc_enable(&pdev->dev, 0); + release_resource(puv3_rtc_mem); + + err_nores: + return ret; +} + +#ifdef CONFIG_PM_SLEEP +static int ticnt_save; + +static int puv3_rtc_suspend(struct device *dev) +{ + /* save RTAR for anyone using periodic interrupts */ + ticnt_save = readl(RTC_RTAR); + puv3_rtc_enable(dev, 0); + return 0; +} + +static int puv3_rtc_resume(struct device *dev) +{ + puv3_rtc_enable(dev, 1); + writel(ticnt_save, RTC_RTAR); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(puv3_rtc_pm_ops, puv3_rtc_suspend, puv3_rtc_resume); + +static struct platform_driver puv3_rtc_driver = { + .probe = puv3_rtc_probe, + .remove = puv3_rtc_remove, + .driver = { + .name = "PKUnity-v3-RTC", + .owner = THIS_MODULE, + .pm = &puv3_rtc_pm_ops, + } +}; + +module_platform_driver(puv3_rtc_driver); + +MODULE_DESCRIPTION("RTC Driver for the PKUnity v3 chip"); +MODULE_AUTHOR("Hu Dongliang"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c index 29e867a1aaa..4561f375327 100644 --- a/drivers/rtc/rtc-pxa.c +++ b/drivers/rtc/rtc-pxa.c @@ -27,10 +27,11 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_device.h> #include <mach/hardware.h> -#define TIMER_FREQ CLOCK_TICK_RATE #define RTC_DEF_DIVIDER (32768 - 1) #define RTC_DEF_TRIM 0 #define MAXFREQ_PERIODIC 1000 @@ -60,6 +61,10 @@ #define RYxR_MONTH_S 5 #define RYxR_MONTH_MASK (0xf << RYxR_MONTH_S) #define RYxR_DAY_MASK 0x1f +#define RDxR_WOM_S 20 +#define RDxR_WOM_MASK (0x7 << RDxR_WOM_S) +#define RDxR_DOW_S 17 +#define RDxR_DOW_MASK (0x7 << RDxR_DOW_S) #define RDxR_HOUR_S 12 #define RDxR_HOUR_MASK (0x1f << RDxR_HOUR_S) #define RDxR_MIN_S 6 @@ -89,6 +94,7 @@ struct pxa_rtc { spinlock_t lock; /* Protects this structure */ }; + static u32 ryxr_calc(struct rtc_time *tm) { return ((tm->tm_year + 1900) << RYxR_YEAR_S) @@ -98,7 +104,10 @@ static u32 ryxr_calc(struct rtc_time *tm) static u32 rdxr_calc(struct rtc_time *tm) { - return (tm->tm_hour << RDxR_HOUR_S) | (tm->tm_min << RDxR_MIN_S) + return ((((tm->tm_mday + 6) / 7) << RDxR_WOM_S) & RDxR_WOM_MASK) + | (((tm->tm_wday + 1) << RDxR_DOW_S) & RDxR_DOW_MASK) + | (tm->tm_hour << RDxR_HOUR_S) + | (tm->tm_min << RDxR_MIN_S) | tm->tm_sec; } @@ -107,6 +116,7 @@ static void tm_calc(u32 rycr, u32 rdcr, struct rtc_time *tm) tm->tm_year = ((rycr & RYxR_YEAR_MASK) >> RYxR_YEAR_S) - 1900; tm->tm_mon = (((rycr & RYxR_MONTH_MASK) >> RYxR_MONTH_S)) - 1; tm->tm_mday = (rycr & RYxR_DAY_MASK); + tm->tm_wday = ((rycr & RDxR_DOW_MASK) >> RDxR_DOW_S) - 1; tm->tm_hour = (rdcr & RDxR_HOUR_MASK) >> RDxR_HOUR_S; tm->tm_min = (rdcr & RDxR_MIN_MASK) >> RDxR_MIN_S; tm->tm_sec = rdcr & RDxR_SEC_MASK; @@ -174,14 +184,14 @@ static int pxa_rtc_open(struct device *dev) struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); int ret; - ret = request_irq(pxa_rtc->irq_1Hz, pxa_rtc_irq, IRQF_DISABLED, + ret = request_irq(pxa_rtc->irq_1Hz, pxa_rtc_irq, 0, "rtc 1Hz", dev); if (ret < 0) { dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->irq_1Hz, ret); goto err_irq_1Hz; } - ret = request_irq(pxa_rtc->irq_Alrm, pxa_rtc_irq, IRQF_DISABLED, + ret = request_irq(pxa_rtc->irq_Alrm, pxa_rtc_irq, 0, "rtc Alrm", dev); if (ret < 0) { dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->irq_Alrm, @@ -209,32 +219,6 @@ static void pxa_rtc_release(struct device *dev) free_irq(pxa_rtc->irq_1Hz, dev); } -static int pxa_periodic_irq_set_freq(struct device *dev, int freq) -{ - struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); - int period_ms; - - if (freq < 1 || freq > MAXFREQ_PERIODIC) - return -EINVAL; - - period_ms = 1000 / freq; - rtc_writel(pxa_rtc, PIAR, period_ms); - - return 0; -} - -static int pxa_periodic_irq_set_state(struct device *dev, int enabled) -{ - struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); - - if (enabled) - rtsr_set_bits(pxa_rtc, RTSR_PIALE | RTSR_PICE); - else - rtsr_clear_bits(pxa_rtc, RTSR_PIALE | RTSR_PICE); - - return 0; -} - static int pxa_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); @@ -250,21 +234,6 @@ static int pxa_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int pxa_update_irq_enable(struct device *dev, unsigned int enabled) -{ - struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); - - spin_lock_irq(&pxa_rtc->lock); - - if (enabled) - rtsr_set_bits(pxa_rtc, RTSR_HZE); - else - rtsr_clear_bits(pxa_rtc, RTSR_HZE); - - spin_unlock_irq(&pxa_rtc->lock); - return 0; -} - static int pxa_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); @@ -339,17 +308,12 @@ static int pxa_rtc_proc(struct device *dev, struct seq_file *seq) } static const struct rtc_class_ops pxa_rtc_ops = { - .open = pxa_rtc_open, - .release = pxa_rtc_release, .read_time = pxa_rtc_read_time, .set_time = pxa_rtc_set_time, .read_alarm = pxa_rtc_read_alarm, .set_alarm = pxa_rtc_set_alarm, .alarm_irq_enable = pxa_alarm_irq_enable, - .update_irq_enable = pxa_update_irq_enable, .proc = pxa_rtc_proc, - .irq_set_state = pxa_periodic_irq_set_state, - .irq_set_freq = pxa_periodic_irq_set_freq, }; static int __init pxa_rtc_probe(struct platform_device *pdev) @@ -359,37 +323,35 @@ static int __init pxa_rtc_probe(struct platform_device *pdev) int ret; u32 rttr; - pxa_rtc = kzalloc(sizeof(struct pxa_rtc), GFP_KERNEL); + pxa_rtc = devm_kzalloc(dev, sizeof(*pxa_rtc), GFP_KERNEL); if (!pxa_rtc) return -ENOMEM; spin_lock_init(&pxa_rtc->lock); platform_set_drvdata(pdev, pxa_rtc); - ret = -ENXIO; pxa_rtc->ress = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!pxa_rtc->ress) { dev_err(dev, "No I/O memory resource defined\n"); - goto err_ress; + return -ENXIO; } pxa_rtc->irq_1Hz = platform_get_irq(pdev, 0); if (pxa_rtc->irq_1Hz < 0) { dev_err(dev, "No 1Hz IRQ resource defined\n"); - goto err_ress; + return -ENXIO; } pxa_rtc->irq_Alrm = platform_get_irq(pdev, 1); if (pxa_rtc->irq_Alrm < 0) { dev_err(dev, "No alarm IRQ resource defined\n"); - goto err_ress; + return -ENXIO; } - - ret = -ENOMEM; - pxa_rtc->base = ioremap(pxa_rtc->ress->start, + pxa_rtc_open(dev); + pxa_rtc->base = devm_ioremap(dev, pxa_rtc->ress->start, resource_size(pxa_rtc->ress)); if (!pxa_rtc->base) { - dev_err(&pdev->dev, "Unable to map pxa RTC I/O memory\n"); - goto err_map; + dev_err(dev, "Unable to map pxa RTC I/O memory\n"); + return -ENOMEM; } /* @@ -405,42 +367,36 @@ static int __init pxa_rtc_probe(struct platform_device *pdev) rtsr_clear_bits(pxa_rtc, RTSR_PIALE | RTSR_RDALE1 | RTSR_HZE); - pxa_rtc->rtc = rtc_device_register("pxa-rtc", &pdev->dev, &pxa_rtc_ops, - THIS_MODULE); - ret = PTR_ERR(pxa_rtc->rtc); + pxa_rtc->rtc = devm_rtc_device_register(&pdev->dev, "pxa-rtc", + &pxa_rtc_ops, THIS_MODULE); if (IS_ERR(pxa_rtc->rtc)) { + ret = PTR_ERR(pxa_rtc->rtc); dev_err(dev, "Failed to register RTC device -> %d\n", ret); - goto err_rtc_reg; + return ret; } device_init_wakeup(dev, 1); return 0; - -err_rtc_reg: - iounmap(pxa_rtc->base); -err_ress: -err_map: - kfree(pxa_rtc); - return ret; } static int __exit pxa_rtc_remove(struct platform_device *pdev) { - struct pxa_rtc *pxa_rtc = platform_get_drvdata(pdev); - - rtc_device_unregister(pxa_rtc->rtc); - - spin_lock_irq(&pxa_rtc->lock); - iounmap(pxa_rtc->base); - spin_unlock_irq(&pxa_rtc->lock); - - kfree(pxa_rtc); + struct device *dev = &pdev->dev; + pxa_rtc_release(dev); return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_OF +static const struct of_device_id pxa_rtc_dt_ids[] = { + { .compatible = "marvell,pxa-rtc" }, + {} +}; +MODULE_DEVICE_TABLE(of, pxa_rtc_dt_ids); +#endif + +#ifdef CONFIG_PM_SLEEP static int pxa_rtc_suspend(struct device *dev) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); @@ -458,38 +414,20 @@ static int pxa_rtc_resume(struct device *dev) disable_irq_wake(pxa_rtc->irq_Alrm); return 0; } - -static const struct dev_pm_ops pxa_rtc_pm_ops = { - .suspend = pxa_rtc_suspend, - .resume = pxa_rtc_resume, -}; #endif +static SIMPLE_DEV_PM_OPS(pxa_rtc_pm_ops, pxa_rtc_suspend, pxa_rtc_resume); + static struct platform_driver pxa_rtc_driver = { .remove = __exit_p(pxa_rtc_remove), .driver = { .name = "pxa-rtc", -#ifdef CONFIG_PM + .of_match_table = of_match_ptr(pxa_rtc_dt_ids), .pm = &pxa_rtc_pm_ops, -#endif }, }; -static int __init pxa_rtc_init(void) -{ - if (cpu_is_pxa27x() || cpu_is_pxa3xx()) - return platform_driver_probe(&pxa_rtc_driver, pxa_rtc_probe); - - return -ENODEV; -} - -static void __exit pxa_rtc_exit(void) -{ - platform_driver_unregister(&pxa_rtc_driver); -} - -module_init(pxa_rtc_init); -module_exit(pxa_rtc_exit); +module_platform_driver_probe(pxa_rtc_driver, pxa_rtc_probe); MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>"); MODULE_DESCRIPTION("PXA27x/PXA3xx Realtime Clock Driver (RTC)"); diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c index 9beba49c3c5..feeedbd8200 100644 --- a/drivers/rtc/rtc-r9701.c +++ b/drivers/rtc/rtc-r9701.c @@ -119,34 +119,53 @@ static const struct rtc_class_ops r9701_rtc_ops = { .set_time = r9701_set_datetime, }; -static int __devinit r9701_probe(struct spi_device *spi) +static int r9701_probe(struct spi_device *spi) { struct rtc_device *rtc; + struct rtc_time dt; unsigned char tmp; int res; - rtc = rtc_device_register("r9701", - &spi->dev, &r9701_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) - return PTR_ERR(rtc); - - dev_set_drvdata(&spi->dev, rtc); - tmp = R100CNT; res = read_regs(&spi->dev, &tmp, 1); if (res || tmp != 0x20) { - rtc_device_unregister(rtc); - return res; + dev_err(&spi->dev, "cannot read RTC register\n"); + return -ENODEV; } + /* + * The device seems to be present. Now check if the registers + * contain invalid values. If so, try to write a default date: + * 2000/1/1 00:00:00 + */ + if (r9701_get_datetime(&spi->dev, &dt)) { + dev_info(&spi->dev, "trying to repair invalid date/time\n"); + dt.tm_sec = 0; + dt.tm_min = 0; + dt.tm_hour = 0; + dt.tm_mday = 1; + dt.tm_mon = 0; + dt.tm_year = 100; + + if (r9701_set_datetime(&spi->dev, &dt) || + r9701_get_datetime(&spi->dev, &dt)) { + dev_err(&spi->dev, "cannot repair RTC register\n"); + return -ENODEV; + } + } + + rtc = devm_rtc_device_register(&spi->dev, "r9701", + &r9701_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + spi_set_drvdata(spi, rtc); + return 0; } -static int __devexit r9701_remove(struct spi_device *spi) +static int r9701_remove(struct spi_device *spi) { - struct rtc_device *rtc = dev_get_drvdata(&spi->dev); - - rtc_device_unregister(rtc); return 0; } @@ -156,20 +175,10 @@ static struct spi_driver r9701_driver = { .owner = THIS_MODULE, }, .probe = r9701_probe, - .remove = __devexit_p(r9701_remove), + .remove = r9701_remove, }; -static __init int r9701_init(void) -{ - return spi_register_driver(&r9701_driver); -} -module_init(r9701_init); - -static __exit void r9701_exit(void) -{ - spi_unregister_driver(&r9701_driver); -} -module_exit(r9701_exit); +module_spi_driver(r9701_driver); MODULE_DESCRIPTION("r9701 spi RTC driver"); MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); diff --git a/drivers/rtc/rtc-rc5t583.c b/drivers/rtc/rtc-rc5t583.c new file mode 100644 index 00000000000..e53e9b1c69b --- /dev/null +++ b/drivers/rtc/rtc-rc5t583.c @@ -0,0 +1,322 @@ +/* + * rtc-rc5t583.c -- RICOH RC5T583 Real Time Clock + * + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * Author: Venu Byravarasu <vbyravarasu@nvidia.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/mfd/rc5t583.h> + +struct rc5t583_rtc { + struct rtc_device *rtc; + /* To store the list of enabled interrupts, during system suspend */ + u32 irqen; +}; + +/* Total number of RTC registers needed to set time*/ +#define NUM_TIME_REGS (RC5T583_RTC_YEAR - RC5T583_RTC_SEC + 1) + +/* Total number of RTC registers needed to set Y-Alarm*/ +#define NUM_YAL_REGS (RC5T583_RTC_AY_YEAR - RC5T583_RTC_AY_MIN + 1) + +/* Set Y-Alarm interrupt */ +#define SET_YAL BIT(5) + +/* Get Y-Alarm interrupt status*/ +#define GET_YAL_STATUS BIT(3) + +static int rc5t583_rtc_alarm_irq_enable(struct device *dev, unsigned enabled) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + u8 val; + + /* Set Y-Alarm, based on 'enabled' */ + val = enabled ? SET_YAL : 0; + + return regmap_update_bits(rc5t583->regmap, RC5T583_RTC_CTL1, SET_YAL, + val); +} + +/* + * Gets current rc5t583 RTC time and date parameters. + * + * The RTC's time/alarm representation is not what gmtime(3) requires + * Linux to use: + * + * - Months are 1..12 vs Linux 0-11 + * - Years are 0..99 vs Linux 1900..N (we assume 21st century) + */ +static int rc5t583_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + u8 rtc_data[NUM_TIME_REGS]; + int ret; + + ret = regmap_bulk_read(rc5t583->regmap, RC5T583_RTC_SEC, rtc_data, + NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "RTC read time failed with err:%d\n", ret); + return ret; + } + + tm->tm_sec = bcd2bin(rtc_data[0]); + tm->tm_min = bcd2bin(rtc_data[1]); + tm->tm_hour = bcd2bin(rtc_data[2]); + tm->tm_wday = bcd2bin(rtc_data[3]); + tm->tm_mday = bcd2bin(rtc_data[4]); + tm->tm_mon = bcd2bin(rtc_data[5]) - 1; + tm->tm_year = bcd2bin(rtc_data[6]) + 100; + + return ret; +} + +static int rc5t583_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + unsigned char rtc_data[NUM_TIME_REGS]; + int ret; + + rtc_data[0] = bin2bcd(tm->tm_sec); + rtc_data[1] = bin2bcd(tm->tm_min); + rtc_data[2] = bin2bcd(tm->tm_hour); + rtc_data[3] = bin2bcd(tm->tm_wday); + rtc_data[4] = bin2bcd(tm->tm_mday); + rtc_data[5] = bin2bcd(tm->tm_mon + 1); + rtc_data[6] = bin2bcd(tm->tm_year - 100); + + ret = regmap_bulk_write(rc5t583->regmap, RC5T583_RTC_SEC, rtc_data, + NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "RTC set time failed with error %d\n", ret); + return ret; + } + + return ret; +} + +static int rc5t583_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + unsigned char alarm_data[NUM_YAL_REGS]; + u32 interrupt_enable; + int ret; + + ret = regmap_bulk_read(rc5t583->regmap, RC5T583_RTC_AY_MIN, alarm_data, + NUM_YAL_REGS); + if (ret < 0) { + dev_err(dev, "rtc_read_alarm error %d\n", ret); + return ret; + } + + alm->time.tm_min = bcd2bin(alarm_data[0]); + alm->time.tm_hour = bcd2bin(alarm_data[1]); + alm->time.tm_mday = bcd2bin(alarm_data[2]); + alm->time.tm_mon = bcd2bin(alarm_data[3]) - 1; + alm->time.tm_year = bcd2bin(alarm_data[4]) + 100; + + ret = regmap_read(rc5t583->regmap, RC5T583_RTC_CTL1, &interrupt_enable); + if (ret < 0) + return ret; + + /* check if YALE is set */ + if (interrupt_enable & SET_YAL) + alm->enabled = 1; + + return ret; +} + +static int rc5t583_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + unsigned char alarm_data[NUM_YAL_REGS]; + int ret; + + ret = rc5t583_rtc_alarm_irq_enable(dev, 0); + if (ret) + return ret; + + alarm_data[0] = bin2bcd(alm->time.tm_min); + alarm_data[1] = bin2bcd(alm->time.tm_hour); + alarm_data[2] = bin2bcd(alm->time.tm_mday); + alarm_data[3] = bin2bcd(alm->time.tm_mon + 1); + alarm_data[4] = bin2bcd(alm->time.tm_year - 100); + + ret = regmap_bulk_write(rc5t583->regmap, RC5T583_RTC_AY_MIN, alarm_data, + NUM_YAL_REGS); + if (ret) { + dev_err(dev, "rtc_set_alarm error %d\n", ret); + return ret; + } + + if (alm->enabled) + ret = rc5t583_rtc_alarm_irq_enable(dev, 1); + + return ret; +} + +static irqreturn_t rc5t583_rtc_interrupt(int irq, void *rtc) +{ + struct device *dev = rtc; + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + struct rc5t583_rtc *rc5t583_rtc = dev_get_drvdata(dev); + unsigned long events = 0; + int ret; + u32 rtc_reg; + + ret = regmap_read(rc5t583->regmap, RC5T583_RTC_CTL2, &rtc_reg); + if (ret < 0) + return IRQ_NONE; + + if (rtc_reg & GET_YAL_STATUS) { + events = RTC_IRQF | RTC_AF; + /* clear pending Y-alarm interrupt bit */ + rtc_reg &= ~GET_YAL_STATUS; + } + + ret = regmap_write(rc5t583->regmap, RC5T583_RTC_CTL2, rtc_reg); + if (ret) + return IRQ_NONE; + + /* Notify RTC core on event */ + rtc_update_irq(rc5t583_rtc->rtc, 1, events); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops rc5t583_rtc_ops = { + .read_time = rc5t583_rtc_read_time, + .set_time = rc5t583_rtc_set_time, + .read_alarm = rc5t583_rtc_read_alarm, + .set_alarm = rc5t583_rtc_set_alarm, + .alarm_irq_enable = rc5t583_rtc_alarm_irq_enable, +}; + +static int rc5t583_rtc_probe(struct platform_device *pdev) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent); + struct rc5t583_rtc *ricoh_rtc; + struct rc5t583_platform_data *pmic_plat_data; + int ret; + int irq; + + ricoh_rtc = devm_kzalloc(&pdev->dev, sizeof(struct rc5t583_rtc), + GFP_KERNEL); + if (!ricoh_rtc) + return -ENOMEM; + + platform_set_drvdata(pdev, ricoh_rtc); + + /* Clear pending interrupts */ + ret = regmap_write(rc5t583->regmap, RC5T583_RTC_CTL2, 0); + if (ret < 0) + return ret; + + /* clear RTC Adjust register */ + ret = regmap_write(rc5t583->regmap, RC5T583_RTC_ADJ, 0); + if (ret < 0) { + dev_err(&pdev->dev, "unable to program rtc_adjust reg\n"); + return -EBUSY; + } + + pmic_plat_data = dev_get_platdata(rc5t583->dev); + irq = pmic_plat_data->irq_base; + if (irq <= 0) { + dev_warn(&pdev->dev, "Wake up is not possible as irq = %d\n", + irq); + return ret; + } + + irq += RC5T583_IRQ_YALE; + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + rc5t583_rtc_interrupt, IRQF_TRIGGER_LOW, + "rtc-rc5t583", &pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "IRQ is not free.\n"); + return ret; + } + device_init_wakeup(&pdev->dev, 1); + + ricoh_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &rc5t583_rtc_ops, THIS_MODULE); + if (IS_ERR(ricoh_rtc->rtc)) { + ret = PTR_ERR(ricoh_rtc->rtc); + dev_err(&pdev->dev, "RTC device register: err %d\n", ret); + return ret; + } + + return 0; +} + +/* + * Disable rc5t583 RTC interrupts. + * Sets status flag to free. + */ +static int rc5t583_rtc_remove(struct platform_device *pdev) +{ + struct rc5t583_rtc *rc5t583_rtc = platform_get_drvdata(pdev); + + rc5t583_rtc_alarm_irq_enable(&rc5t583_rtc->rtc->dev, 0); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int rc5t583_rtc_suspend(struct device *dev) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + struct rc5t583_rtc *rc5t583_rtc = dev_get_drvdata(dev); + int ret; + + /* Store current list of enabled interrupts*/ + ret = regmap_read(rc5t583->regmap, RC5T583_RTC_CTL1, + &rc5t583_rtc->irqen); + return ret; +} + +static int rc5t583_rtc_resume(struct device *dev) +{ + struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent); + struct rc5t583_rtc *rc5t583_rtc = dev_get_drvdata(dev); + + /* Restore list of enabled interrupts before suspend */ + return regmap_write(rc5t583->regmap, RC5T583_RTC_CTL1, + rc5t583_rtc->irqen); +} +#endif + +static SIMPLE_DEV_PM_OPS(rc5t583_rtc_pm_ops, rc5t583_rtc_suspend, + rc5t583_rtc_resume); + +static struct platform_driver rc5t583_rtc_driver = { + .probe = rc5t583_rtc_probe, + .remove = rc5t583_rtc_remove, + .driver = { + .owner = THIS_MODULE, + .name = "rtc-rc5t583", + .pm = &rc5t583_rtc_pm_ops, + }, +}; + +module_platform_driver(rc5t583_rtc_driver); +MODULE_ALIAS("platform:rtc-rc5t583"); +MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-rp5c01.c b/drivers/rtc/rtc-rp5c01.c index 36eb6618446..89d07367926 100644 --- a/drivers/rtc/rtc-rp5c01.c +++ b/drivers/rtc/rtc-rp5c01.c @@ -76,7 +76,7 @@ static inline unsigned int rp5c01_read(struct rp5c01_priv *priv, static inline void rp5c01_write(struct rp5c01_priv *priv, unsigned int val, unsigned int reg) { - return __raw_writel(val, &priv->regs[reg]); + __raw_writel(val, &priv->regs[reg]); } static void rp5c01_lock(struct rp5c01_priv *priv) @@ -230,15 +230,13 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev) if (!res) return -ENODEV; - priv = kzalloc(sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->regs = ioremap(res->start, resource_size(res)); - if (!priv->regs) { - error = -ENOMEM; - goto out_free_priv; - } + priv->regs = devm_ioremap(&dev->dev, res->start, resource_size(res)); + if (!priv->regs) + return -ENOMEM; sysfs_bin_attr_init(&priv->nvram_attr); priv->nvram_attr.attr.name = "nvram"; @@ -249,29 +247,19 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev) spin_lock_init(&priv->lock); - rtc = rtc_device_register("rtc-rp5c01", &dev->dev, &rp5c01_rtc_ops, - THIS_MODULE); - if (IS_ERR(rtc)) { - error = PTR_ERR(rtc); - goto out_unmap; - } + platform_set_drvdata(dev, priv); + rtc = devm_rtc_device_register(&dev->dev, "rtc-rp5c01", &rp5c01_rtc_ops, + THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); priv->rtc = rtc; - platform_set_drvdata(dev, priv); error = sysfs_create_bin_file(&dev->dev.kobj, &priv->nvram_attr); if (error) - goto out_unregister; + return error; return 0; - -out_unregister: - rtc_device_unregister(rtc); -out_unmap: - iounmap(priv->regs); -out_free_priv: - kfree(priv); - return error; } static int __exit rp5c01_rtc_remove(struct platform_device *dev) @@ -279,9 +267,6 @@ static int __exit rp5c01_rtc_remove(struct platform_device *dev) struct rp5c01_priv *priv = platform_get_drvdata(dev); sysfs_remove_bin_file(&dev->dev.kobj, &priv->nvram_attr); - rtc_device_unregister(priv->rtc); - iounmap(priv->regs); - kfree(priv); return 0; } @@ -293,18 +278,7 @@ static struct platform_driver rp5c01_rtc_driver = { .remove = __exit_p(rp5c01_rtc_remove), }; -static int __init rp5c01_rtc_init(void) -{ - return platform_driver_probe(&rp5c01_rtc_driver, rp5c01_rtc_probe); -} - -static void __exit rp5c01_rtc_fini(void) -{ - platform_driver_unregister(&rp5c01_rtc_driver); -} - -module_init(rp5c01_rtc_init); -module_exit(rp5c01_rtc_fini); +module_platform_driver_probe(rp5c01_rtc_driver, rp5c01_rtc_probe); MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-rs5c313.c b/drivers/rtc/rtc-rs5c313.c index e3ff179b99c..68f7856422f 100644 --- a/drivers/rtc/rtc-rs5c313.c +++ b/drivers/rtc/rtc-rs5c313.c @@ -39,16 +39,18 @@ * 1.13 Nobuhiro Iwamatsu: Updata driver. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/module.h> #include <linux/err.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/bcd.h> #include <linux/delay.h> -#include <asm/io.h> +#include <linux/io.h> #define DRV_NAME "rs5c313" -#define DRV_VERSION "1.13" +#define DRV_VERSION "1.13" #ifdef CONFIG_SH_LANDISK /*****************************************************/ @@ -299,7 +301,7 @@ static int rs5c313_rtc_set_time(struct device *dev, struct rtc_time *tm) rs5c313_write_reg(RS5C313_ADDR_SEC10, (data >> 4)); data = bin2bcd(tm->tm_min); - rs5c313_write_reg(RS5C313_ADDR_MIN, data ); + rs5c313_write_reg(RS5C313_ADDR_MIN, data); rs5c313_write_reg(RS5C313_ADDR_MIN10, (data >> 4)); data = bin2bcd(tm->tm_hour); @@ -308,7 +310,7 @@ static int rs5c313_rtc_set_time(struct device *dev, struct rtc_time *tm) data = bin2bcd(tm->tm_mday); rs5c313_write_reg(RS5C313_ADDR_DAY, data); - rs5c313_write_reg(RS5C313_ADDR_DAY10, (data>> 4)); + rs5c313_write_reg(RS5C313_ADDR_DAY10, (data >> 4)); data = bin2bcd(tm->tm_mon + 1); rs5c313_write_reg(RS5C313_ADDR_MON, data); @@ -347,13 +349,12 @@ static void rs5c313_check_xstp_bit(void) } memset(&tm, 0, sizeof(struct rtc_time)); - tm.tm_mday = 1; - tm.tm_mon = 1 - 1; - tm.tm_year = 2000 - 1900; + tm.tm_mday = 1; + tm.tm_mon = 1 - 1; + tm.tm_year = 2000 - 1900; rs5c313_rtc_set_time(NULL, &tm); - printk(KERN_ERR "RICHO RS5C313: invalid value, resetting to " - "1 Jan 2000\n"); + pr_err("invalid value, resetting to 1 Jan 2000\n"); } RS5C313_CEDISABLE; ndelay(700); /* CE:L */ @@ -366,7 +367,7 @@ static const struct rtc_class_ops rs5c313_rtc_ops = { static int rs5c313_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc = rtc_device_register("rs5c313", &pdev->dev, + struct rtc_device *rtc = devm_rtc_device_register(&pdev->dev, "rs5c313", &rs5c313_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) @@ -377,22 +378,12 @@ static int rs5c313_rtc_probe(struct platform_device *pdev) return 0; } -static int __devexit rs5c313_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc = platform_get_drvdata( pdev ); - - rtc_device_unregister(rtc); - - return 0; -} - static struct platform_driver rs5c313_rtc_platform_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, - .probe = rs5c313_rtc_probe, - .remove = __devexit_p( rs5c313_rtc_remove ), + .probe = rs5c313_rtc_probe, }; static int __init rs5c313_rtc_init(void) @@ -411,7 +402,7 @@ static int __init rs5c313_rtc_init(void) static void __exit rs5c313_rtc_exit(void) { - platform_driver_unregister( &rs5c313_rtc_platform_driver ); + platform_driver_unregister(&rs5c313_rtc_platform_driver); } module_init(rs5c313_rtc_init); diff --git a/drivers/rtc/rtc-rs5c348.c b/drivers/rtc/rtc-rs5c348.c index 368d0e63cf8..090a101c1c8 100644 --- a/drivers/rtc/rtc-rs5c348.c +++ b/drivers/rtc/rtc-rs5c348.c @@ -23,6 +23,7 @@ #include <linux/rtc.h> #include <linux/workqueue.h> #include <linux/spi/spi.h> +#include <linux/module.h> #define DRV_VERSION "0.2" @@ -63,7 +64,7 @@ static int rs5c348_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct spi_device *spi = to_spi_device(dev); - struct rs5c348_plat_data *pdata = spi->dev.platform_data; + struct rs5c348_plat_data *pdata = dev_get_platdata(&spi->dev); u8 txbuf[5+7], *txp; int ret; @@ -99,7 +100,7 @@ static int rs5c348_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct spi_device *spi = to_spi_device(dev); - struct rs5c348_plat_data *pdata = spi->dev.platform_data; + struct rs5c348_plat_data *pdata = dev_get_platdata(&spi->dev); u8 txbuf[5], rxbuf[7]; int ret; @@ -121,9 +122,12 @@ rs5c348_rtc_read_time(struct device *dev, struct rtc_time *tm) tm->tm_min = bcd2bin(rxbuf[RS5C348_REG_MINS] & RS5C348_MINS_MASK); tm->tm_hour = bcd2bin(rxbuf[RS5C348_REG_HOURS] & RS5C348_HOURS_MASK); if (!pdata->rtc_24h) { - tm->tm_hour %= 12; - if (rxbuf[RS5C348_REG_HOURS] & RS5C348_BIT_PM) + if (rxbuf[RS5C348_REG_HOURS] & RS5C348_BIT_PM) { + tm->tm_hour -= 20; + tm->tm_hour %= 12; tm->tm_hour += 12; + } else + tm->tm_hour %= 12; } tm->tm_wday = bcd2bin(rxbuf[RS5C348_REG_WDAY] & RS5C348_WDAY_MASK); tm->tm_mday = bcd2bin(rxbuf[RS5C348_REG_DAY] & RS5C348_DAY_MASK); @@ -148,13 +152,14 @@ static const struct rtc_class_ops rs5c348_rtc_ops = { static struct spi_driver rs5c348_driver; -static int __devinit rs5c348_probe(struct spi_device *spi) +static int rs5c348_probe(struct spi_device *spi) { int ret; struct rtc_device *rtc; struct rs5c348_plat_data *pdata; - pdata = kzalloc(sizeof(struct rs5c348_plat_data), GFP_KERNEL); + pdata = devm_kzalloc(&spi->dev, sizeof(struct rs5c348_plat_data), + GFP_KERNEL); if (!pdata) return -ENOMEM; spi->dev.platform_data = pdata; @@ -198,7 +203,7 @@ static int __devinit rs5c348_probe(struct spi_device *spi) if (ret & RS5C348_BIT_24H) pdata->rtc_24h = 1; - rtc = rtc_device_register(rs5c348_driver.driver.name, &spi->dev, + rtc = devm_rtc_device_register(&spi->dev, rs5c348_driver.driver.name, &rs5c348_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { @@ -210,43 +215,18 @@ static int __devinit rs5c348_probe(struct spi_device *spi) return 0; kfree_exit: - kfree(pdata); return ret; } -static int __devexit rs5c348_remove(struct spi_device *spi) -{ - struct rs5c348_plat_data *pdata = spi->dev.platform_data; - struct rtc_device *rtc = pdata->rtc; - - if (rtc) - rtc_device_unregister(rtc); - kfree(pdata); - return 0; -} - static struct spi_driver rs5c348_driver = { .driver = { .name = "rtc-rs5c348", - .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = rs5c348_probe, - .remove = __devexit_p(rs5c348_remove), }; -static __init int rs5c348_init(void) -{ - return spi_register_driver(&rs5c348_driver); -} - -static __exit void rs5c348_exit(void) -{ - spi_unregister_driver(&rs5c348_driver); -} - -module_init(rs5c348_init); -module_exit(rs5c348_exit); +module_spi_driver(rs5c348_driver); MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>"); MODULE_DESCRIPTION("Ricoh RS5C348 RTC driver"); diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c index 90cf0a6ff23..ccf54f06396 100644 --- a/drivers/rtc/rtc-rs5c372.c +++ b/drivers/rtc/rtc-rs5c372.c @@ -14,6 +14,7 @@ #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/slab.h> +#include <linux/module.h> #define DRV_VERSION "0.6" @@ -67,6 +68,7 @@ enum rtc_type { rtc_undef = 0, rtc_r2025sd, + rtc_r2221tl, rtc_rs5c372a, rtc_rs5c372b, rtc_rv5c386, @@ -75,6 +77,7 @@ enum rtc_type { static const struct i2c_device_id rs5c372_id[] = { { "r2025sd", rtc_r2025sd }, + { "r2221tl", rtc_r2221tl }, { "rs5c372a", rtc_rs5c372a }, { "rs5c372b", rtc_rs5c372b }, { "rv5c386", rtc_rv5c386 }, @@ -103,7 +106,12 @@ static int rs5c_get_regs(struct rs5c372 *rs5c) { struct i2c_client *client = rs5c->client; struct i2c_msg msgs[] = { - { client->addr, I2C_M_RD, sizeof rs5c->buf, rs5c->buf }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = sizeof(rs5c->buf), + .buf = rs5c->buf + }, }; /* This implements the third reading method from the datasheet, using @@ -207,7 +215,7 @@ static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm) static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm) { struct rs5c372 *rs5c = i2c_get_clientdata(client); - unsigned char buf[8]; + unsigned char buf[7]; int addr; dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d " @@ -281,10 +289,8 @@ static int rs5c372_rtc_set_time(struct device *dev, struct rtc_time *tm) return rs5c372_set_datetime(to_i2c_client(dev), tm); } -#if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE) -static int -rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +static int rs5c_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct i2c_client *client = to_i2c_client(dev); struct rs5c372 *rs5c = i2c_get_clientdata(client); @@ -292,49 +298,22 @@ rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) int status, addr; buf = rs5c->regs[RS5C_REG_CTRL1]; - switch (cmd) { - case RTC_UIE_OFF: - case RTC_UIE_ON: - /* some 327a modes use a different IRQ pin for 1Hz irqs */ - if (rs5c->type == rtc_rs5c372a - && (buf & RS5C372A_CTRL1_SL1)) - return -ENOIOCTLCMD; - case RTC_AIE_OFF: - case RTC_AIE_ON: - /* these irq management calls only make sense for chips - * which are wired up to an IRQ. - */ - if (!rs5c->has_irq) - return -ENOIOCTLCMD; - break; - default: - return -ENOIOCTLCMD; - } + + if (!rs5c->has_irq) + return -EINVAL; status = rs5c_get_regs(rs5c); if (status < 0) return status; addr = RS5C_ADDR(RS5C_REG_CTRL1); - switch (cmd) { - case RTC_AIE_OFF: /* alarm off */ - buf &= ~RS5C_CTRL1_AALE; - break; - case RTC_AIE_ON: /* alarm on */ + if (enabled) buf |= RS5C_CTRL1_AALE; - break; - case RTC_UIE_OFF: /* update off */ - buf &= ~RS5C_CTRL1_CT_MASK; - break; - case RTC_UIE_ON: /* update on */ - buf &= ~RS5C_CTRL1_CT_MASK; - buf |= RS5C_CTRL1_CT4; - break; - } + else + buf &= ~RS5C_CTRL1_AALE; if (i2c_smbus_write_byte_data(client, addr, buf) < 0) { - printk(KERN_WARNING "%s: can't update alarm\n", - rs5c->rtc->name); + dev_warn(dev, "can't update alarm\n"); status = -EIO; } else rs5c->regs[RS5C_REG_CTRL1] = buf; @@ -342,10 +321,6 @@ rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) return status; } -#else -#define rs5c_rtc_ioctl NULL -#endif - /* NOTE: Since RTC_WKALM_{RD,SET} were originally defined for EFI, * which only exposes a polled programming interface; and since @@ -407,7 +382,7 @@ static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t) addr = RS5C_ADDR(RS5C_REG_CTRL1); buf[0] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE; if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) { - pr_debug("%s: can't disable alarm\n", rs5c->rtc->name); + dev_dbg(dev, "can't disable alarm\n"); return -EIO; } rs5c->regs[RS5C_REG_CTRL1] = buf[0]; @@ -421,7 +396,7 @@ static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t) for (i = 0; i < sizeof(buf); i++) { addr = RS5C_ADDR(RS5C_REG_ALARM_A_MIN + i); if (i2c_smbus_write_byte_data(client, addr, buf[i]) < 0) { - pr_debug("%s: can't set alarm time\n", rs5c->rtc->name); + dev_dbg(dev, "can't set alarm time\n"); return -EIO; } } @@ -431,8 +406,7 @@ static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t) addr = RS5C_ADDR(RS5C_REG_CTRL1); buf[0] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE; if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) - printk(KERN_WARNING "%s: can't enable alarm\n", - rs5c->rtc->name); + dev_warn(dev, "can't enable alarm\n"); rs5c->regs[RS5C_REG_CTRL1] = buf[0]; } @@ -461,11 +435,11 @@ static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq) static const struct rtc_class_ops rs5c372_rtc_ops = { .proc = rs5c372_rtc_proc, - .ioctl = rs5c_rtc_ioctl, .read_time = rs5c372_rtc_read_time, .set_time = rs5c372_rtc_set_time, .read_alarm = rs5c_read_alarm, .set_alarm = rs5c_set_alarm, + .alarm_irq_enable = rs5c_rtc_alarm_irq_enable, }; #if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE) @@ -557,6 +531,7 @@ static int rs5c_oscillator_setup(struct rs5c372 *rs5c372) rs5c372->time24 = 1; break; case rtc_r2025sd: + case rtc_r2221tl: case rtc_rv5c386: case rtc_rv5c387a: buf[0] |= RV5C387_CTRL1_24; @@ -607,7 +582,9 @@ static int rs5c372_probe(struct i2c_client *client, } } - if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) { + rs5c372 = devm_kzalloc(&client->dev, sizeof(struct rs5c372), + GFP_KERNEL); + if (!rs5c372) { err = -ENOMEM; goto exit; } @@ -622,7 +599,7 @@ static int rs5c372_probe(struct i2c_client *client, err = rs5c_get_regs(rs5c372); if (err < 0) - goto exit_kfree; + goto exit; /* clock may be set for am/pm or 24 hr time */ switch (rs5c372->type) { @@ -635,6 +612,7 @@ static int rs5c372_probe(struct i2c_client *client, rs5c372->time24 = 1; break; case rtc_r2025sd: + case rtc_r2221tl: case rtc_rv5c386: case rtc_rv5c387a: if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24) @@ -645,7 +623,7 @@ static int rs5c372_probe(struct i2c_client *client, break; default: dev_err(&client->dev, "unknown RTC type\n"); - goto exit_kfree; + goto exit; } /* if the oscillator lost power and no other software (like @@ -657,7 +635,7 @@ static int rs5c372_probe(struct i2c_client *client, err = rs5c_oscillator_setup(rs5c372); if (unlikely(err < 0)) { dev_err(&client->dev, "setup error\n"); - goto exit_kfree; + goto exit; } if (rs5c372_get_datetime(client, &tm) < 0) @@ -666,6 +644,7 @@ static int rs5c372_probe(struct i2c_client *client, dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n", ({ char *s; switch (rs5c372->type) { case rtc_r2025sd: s = "r2025sd"; break; + case rtc_r2221tl: s = "r2221tl"; break; case rtc_rs5c372a: s = "rs5c372a"; break; case rtc_rs5c372b: s = "rs5c372b"; break; case rtc_rv5c386: s = "rv5c386"; break; @@ -676,38 +655,28 @@ static int rs5c372_probe(struct i2c_client *client, ); /* REVISIT use client->irq to register alarm irq ... */ - - rs5c372->rtc = rtc_device_register(rs5c372_driver.driver.name, - &client->dev, &rs5c372_rtc_ops, THIS_MODULE); + rs5c372->rtc = devm_rtc_device_register(&client->dev, + rs5c372_driver.driver.name, + &rs5c372_rtc_ops, THIS_MODULE); if (IS_ERR(rs5c372->rtc)) { err = PTR_ERR(rs5c372->rtc); - goto exit_kfree; + goto exit; } err = rs5c_sysfs_register(&client->dev); if (err) - goto exit_devreg; + goto exit; return 0; -exit_devreg: - rtc_device_unregister(rs5c372->rtc); - -exit_kfree: - kfree(rs5c372); - exit: return err; } static int rs5c372_remove(struct i2c_client *client) { - struct rs5c372 *rs5c372 = i2c_get_clientdata(client); - - rtc_device_unregister(rs5c372->rtc); rs5c_sysfs_unregister(&client->dev); - kfree(rs5c372); return 0; } @@ -720,18 +689,7 @@ static struct i2c_driver rs5c372_driver = { .id_table = rs5c372_id, }; -static __init int rs5c372_init(void) -{ - return i2c_add_driver(&rs5c372_driver); -} - -static __exit void rs5c372_exit(void) -{ - i2c_del_driver(&rs5c372_driver); -} - -module_init(rs5c372_init); -module_exit(rs5c372_exit); +module_i2c_driver(rs5c372_driver); MODULE_AUTHOR( "Pavel Mironchik <pmironchik@optifacio.net>, " diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c new file mode 100644 index 00000000000..e9ac5a43be1 --- /dev/null +++ b/drivers/rtc/rtc-rv3029c2.c @@ -0,0 +1,427 @@ +/* + * Micro Crystal RV-3029C2 rtc class driver + * + * Author: Gregory Hermant <gregory.hermant@calao-systems.com> + * + * based on previously existing rtc class drivers + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * NOTE: Currently this driver only supports the bare minimum for read + * and write the RTC and alarms. The extra features provided by this chip + * (trickle charger, eeprom, T° compensation) are unavailable. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/bcd.h> +#include <linux/rtc.h> + +/* Register map */ +/* control section */ +#define RV3029C2_ONOFF_CTRL 0x00 +#define RV3029C2_IRQ_CTRL 0x01 +#define RV3029C2_IRQ_CTRL_AIE (1 << 0) +#define RV3029C2_IRQ_FLAGS 0x02 +#define RV3029C2_IRQ_FLAGS_AF (1 << 0) +#define RV3029C2_STATUS 0x03 +#define RV3029C2_STATUS_VLOW1 (1 << 2) +#define RV3029C2_STATUS_VLOW2 (1 << 3) +#define RV3029C2_STATUS_SR (1 << 4) +#define RV3029C2_STATUS_PON (1 << 5) +#define RV3029C2_STATUS_EEBUSY (1 << 7) +#define RV3029C2_RST_CTRL 0x04 +#define RV3029C2_CONTROL_SECTION_LEN 0x05 + +/* watch section */ +#define RV3029C2_W_SEC 0x08 +#define RV3029C2_W_MINUTES 0x09 +#define RV3029C2_W_HOURS 0x0A +#define RV3029C2_REG_HR_12_24 (1<<6) /* 24h/12h mode */ +#define RV3029C2_REG_HR_PM (1<<5) /* PM/AM bit in 12h mode */ +#define RV3029C2_W_DATE 0x0B +#define RV3029C2_W_DAYS 0x0C +#define RV3029C2_W_MONTHS 0x0D +#define RV3029C2_W_YEARS 0x0E +#define RV3029C2_WATCH_SECTION_LEN 0x07 + +/* alarm section */ +#define RV3029C2_A_SC 0x10 +#define RV3029C2_A_MN 0x11 +#define RV3029C2_A_HR 0x12 +#define RV3029C2_A_DT 0x13 +#define RV3029C2_A_DW 0x14 +#define RV3029C2_A_MO 0x15 +#define RV3029C2_A_YR 0x16 +#define RV3029C2_ALARM_SECTION_LEN 0x07 + +/* timer section */ +#define RV3029C2_TIMER_LOW 0x18 +#define RV3029C2_TIMER_HIGH 0x19 + +/* temperature section */ +#define RV3029C2_TEMP_PAGE 0x20 + +/* eeprom data section */ +#define RV3029C2_E2P_EEDATA1 0x28 +#define RV3029C2_E2P_EEDATA2 0x29 + +/* eeprom control section */ +#define RV3029C2_CONTROL_E2P_EECTRL 0x30 +#define RV3029C2_TRICKLE_1K (1<<0) /* 1K resistance */ +#define RV3029C2_TRICKLE_5K (1<<1) /* 5K resistance */ +#define RV3029C2_TRICKLE_20K (1<<2) /* 20K resistance */ +#define RV3029C2_TRICKLE_80K (1<<3) /* 80K resistance */ +#define RV3029C2_CONTROL_E2P_XTALOFFSET 0x31 +#define RV3029C2_CONTROL_E2P_QCOEF 0x32 +#define RV3029C2_CONTROL_E2P_TURNOVER 0x33 + +/* user ram section */ +#define RV3029C2_USR1_RAM_PAGE 0x38 +#define RV3029C2_USR1_SECTION_LEN 0x04 +#define RV3029C2_USR2_RAM_PAGE 0x3C +#define RV3029C2_USR2_SECTION_LEN 0x04 + +static int +rv3029c2_i2c_read_regs(struct i2c_client *client, u8 reg, u8 *buf, + unsigned len) +{ + int ret; + + if ((reg > RV3029C2_USR1_RAM_PAGE + 7) || + (reg + len > RV3029C2_USR1_RAM_PAGE + 8)) + return -EINVAL; + + ret = i2c_smbus_read_i2c_block_data(client, reg, len, buf); + if (ret < 0) + return ret; + if (ret < len) + return -EIO; + return 0; +} + +static int +rv3029c2_i2c_write_regs(struct i2c_client *client, u8 reg, u8 const buf[], + unsigned len) +{ + if ((reg > RV3029C2_USR1_RAM_PAGE + 7) || + (reg + len > RV3029C2_USR1_RAM_PAGE + 8)) + return -EINVAL; + + return i2c_smbus_write_i2c_block_data(client, reg, len, buf); +} + +static int +rv3029c2_i2c_get_sr(struct i2c_client *client, u8 *buf) +{ + int ret = rv3029c2_i2c_read_regs(client, RV3029C2_STATUS, buf, 1); + + if (ret < 0) + return -EIO; + dev_dbg(&client->dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]); + return 0; +} + +static int +rv3029c2_i2c_set_sr(struct i2c_client *client, u8 val) +{ + u8 buf[1]; + int sr; + + buf[0] = val; + sr = rv3029c2_i2c_write_regs(client, RV3029C2_STATUS, buf, 1); + dev_dbg(&client->dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]); + if (sr < 0) + return -EIO; + return 0; +} + +static int +rv3029c2_i2c_read_time(struct i2c_client *client, struct rtc_time *tm) +{ + u8 buf[1]; + int ret; + u8 regs[RV3029C2_WATCH_SECTION_LEN] = { 0, }; + + ret = rv3029c2_i2c_get_sr(client, buf); + if (ret < 0) { + dev_err(&client->dev, "%s: reading SR failed\n", __func__); + return -EIO; + } + + ret = rv3029c2_i2c_read_regs(client, RV3029C2_W_SEC , regs, + RV3029C2_WATCH_SECTION_LEN); + if (ret < 0) { + dev_err(&client->dev, "%s: reading RTC section failed\n", + __func__); + return ret; + } + + tm->tm_sec = bcd2bin(regs[RV3029C2_W_SEC-RV3029C2_W_SEC]); + tm->tm_min = bcd2bin(regs[RV3029C2_W_MINUTES-RV3029C2_W_SEC]); + + /* HR field has a more complex interpretation */ + { + const u8 _hr = regs[RV3029C2_W_HOURS-RV3029C2_W_SEC]; + if (_hr & RV3029C2_REG_HR_12_24) { + /* 12h format */ + tm->tm_hour = bcd2bin(_hr & 0x1f); + if (_hr & RV3029C2_REG_HR_PM) /* PM flag set */ + tm->tm_hour += 12; + } else /* 24h format */ + tm->tm_hour = bcd2bin(_hr & 0x3f); + } + + tm->tm_mday = bcd2bin(regs[RV3029C2_W_DATE-RV3029C2_W_SEC]); + tm->tm_mon = bcd2bin(regs[RV3029C2_W_MONTHS-RV3029C2_W_SEC]) - 1; + tm->tm_year = bcd2bin(regs[RV3029C2_W_YEARS-RV3029C2_W_SEC]) + 100; + tm->tm_wday = bcd2bin(regs[RV3029C2_W_DAYS-RV3029C2_W_SEC]) - 1; + + return 0; +} + +static int rv3029c2_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + return rv3029c2_i2c_read_time(to_i2c_client(dev), tm); +} + +static int +rv3029c2_i2c_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) +{ + struct rtc_time *const tm = &alarm->time; + int ret; + u8 regs[8]; + + ret = rv3029c2_i2c_get_sr(client, regs); + if (ret < 0) { + dev_err(&client->dev, "%s: reading SR failed\n", __func__); + return -EIO; + } + + ret = rv3029c2_i2c_read_regs(client, RV3029C2_A_SC, regs, + RV3029C2_ALARM_SECTION_LEN); + + if (ret < 0) { + dev_err(&client->dev, "%s: reading alarm section failed\n", + __func__); + return ret; + } + + tm->tm_sec = bcd2bin(regs[RV3029C2_A_SC-RV3029C2_A_SC] & 0x7f); + tm->tm_min = bcd2bin(regs[RV3029C2_A_MN-RV3029C2_A_SC] & 0x7f); + tm->tm_hour = bcd2bin(regs[RV3029C2_A_HR-RV3029C2_A_SC] & 0x3f); + tm->tm_mday = bcd2bin(regs[RV3029C2_A_DT-RV3029C2_A_SC] & 0x3f); + tm->tm_mon = bcd2bin(regs[RV3029C2_A_MO-RV3029C2_A_SC] & 0x1f) - 1; + tm->tm_year = bcd2bin(regs[RV3029C2_A_YR-RV3029C2_A_SC] & 0x7f) + 100; + tm->tm_wday = bcd2bin(regs[RV3029C2_A_DW-RV3029C2_A_SC] & 0x07) - 1; + + return 0; +} + +static int +rv3029c2_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + return rv3029c2_i2c_read_alarm(to_i2c_client(dev), alarm); +} + +static int rv3029c2_rtc_i2c_alarm_set_irq(struct i2c_client *client, + int enable) +{ + int ret; + u8 buf[1]; + + /* enable AIE irq */ + ret = rv3029c2_i2c_read_regs(client, RV3029C2_IRQ_CTRL, buf, 1); + if (ret < 0) { + dev_err(&client->dev, "can't read INT reg\n"); + return ret; + } + if (enable) + buf[0] |= RV3029C2_IRQ_CTRL_AIE; + else + buf[0] &= ~RV3029C2_IRQ_CTRL_AIE; + + ret = rv3029c2_i2c_write_regs(client, RV3029C2_IRQ_CTRL, buf, 1); + if (ret < 0) { + dev_err(&client->dev, "can't set INT reg\n"); + return ret; + } + + return 0; +} + +static int rv3029c2_rtc_i2c_set_alarm(struct i2c_client *client, + struct rtc_wkalrm *alarm) +{ + struct rtc_time *const tm = &alarm->time; + int ret; + u8 regs[8]; + + /* + * The clock has an 8 bit wide bcd-coded register (they never learn) + * for the year. tm_year is an offset from 1900 and we are interested + * in the 2000-2099 range, so any value less than 100 is invalid. + */ + if (tm->tm_year < 100) + return -EINVAL; + + ret = rv3029c2_i2c_get_sr(client, regs); + if (ret < 0) { + dev_err(&client->dev, "%s: reading SR failed\n", __func__); + return -EIO; + } + regs[RV3029C2_A_SC-RV3029C2_A_SC] = bin2bcd(tm->tm_sec & 0x7f); + regs[RV3029C2_A_MN-RV3029C2_A_SC] = bin2bcd(tm->tm_min & 0x7f); + regs[RV3029C2_A_HR-RV3029C2_A_SC] = bin2bcd(tm->tm_hour & 0x3f); + regs[RV3029C2_A_DT-RV3029C2_A_SC] = bin2bcd(tm->tm_mday & 0x3f); + regs[RV3029C2_A_MO-RV3029C2_A_SC] = bin2bcd((tm->tm_mon & 0x1f) - 1); + regs[RV3029C2_A_DW-RV3029C2_A_SC] = bin2bcd((tm->tm_wday & 7) - 1); + regs[RV3029C2_A_YR-RV3029C2_A_SC] = bin2bcd((tm->tm_year & 0x7f) - 100); + + ret = rv3029c2_i2c_write_regs(client, RV3029C2_A_SC, regs, + RV3029C2_ALARM_SECTION_LEN); + if (ret < 0) + return ret; + + if (alarm->enabled) { + u8 buf[1]; + + /* clear AF flag */ + ret = rv3029c2_i2c_read_regs(client, RV3029C2_IRQ_FLAGS, + buf, 1); + if (ret < 0) { + dev_err(&client->dev, "can't read alarm flag\n"); + return ret; + } + buf[0] &= ~RV3029C2_IRQ_FLAGS_AF; + ret = rv3029c2_i2c_write_regs(client, RV3029C2_IRQ_FLAGS, + buf, 1); + if (ret < 0) { + dev_err(&client->dev, "can't set alarm flag\n"); + return ret; + } + /* enable AIE irq */ + ret = rv3029c2_rtc_i2c_alarm_set_irq(client, 1); + if (ret) + return ret; + + dev_dbg(&client->dev, "alarm IRQ armed\n"); + } else { + /* disable AIE irq */ + ret = rv3029c2_rtc_i2c_alarm_set_irq(client, 0); + if (ret) + return ret; + + dev_dbg(&client->dev, "alarm IRQ disabled\n"); + } + + return 0; +} + +static int rv3029c2_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + return rv3029c2_rtc_i2c_set_alarm(to_i2c_client(dev), alarm); +} + +static int +rv3029c2_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm) +{ + u8 regs[8]; + int ret; + + /* + * The clock has an 8 bit wide bcd-coded register (they never learn) + * for the year. tm_year is an offset from 1900 and we are interested + * in the 2000-2099 range, so any value less than 100 is invalid. + */ + if (tm->tm_year < 100) + return -EINVAL; + + regs[RV3029C2_W_SEC-RV3029C2_W_SEC] = bin2bcd(tm->tm_sec); + regs[RV3029C2_W_MINUTES-RV3029C2_W_SEC] = bin2bcd(tm->tm_min); + regs[RV3029C2_W_HOURS-RV3029C2_W_SEC] = bin2bcd(tm->tm_hour); + regs[RV3029C2_W_DATE-RV3029C2_W_SEC] = bin2bcd(tm->tm_mday); + regs[RV3029C2_W_MONTHS-RV3029C2_W_SEC] = bin2bcd(tm->tm_mon+1); + regs[RV3029C2_W_DAYS-RV3029C2_W_SEC] = bin2bcd((tm->tm_wday & 7)+1); + regs[RV3029C2_W_YEARS-RV3029C2_W_SEC] = bin2bcd(tm->tm_year - 100); + + ret = rv3029c2_i2c_write_regs(client, RV3029C2_W_SEC, regs, + RV3029C2_WATCH_SECTION_LEN); + if (ret < 0) + return ret; + + ret = rv3029c2_i2c_get_sr(client, regs); + if (ret < 0) { + dev_err(&client->dev, "%s: reading SR failed\n", __func__); + return ret; + } + /* clear PON bit */ + ret = rv3029c2_i2c_set_sr(client, (regs[0] & ~RV3029C2_STATUS_PON)); + if (ret < 0) { + dev_err(&client->dev, "%s: reading SR failed\n", __func__); + return ret; + } + + return 0; +} + +static int rv3029c2_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + return rv3029c2_i2c_set_time(to_i2c_client(dev), tm); +} + +static const struct rtc_class_ops rv3029c2_rtc_ops = { + .read_time = rv3029c2_rtc_read_time, + .set_time = rv3029c2_rtc_set_time, + .read_alarm = rv3029c2_rtc_read_alarm, + .set_alarm = rv3029c2_rtc_set_alarm, +}; + +static struct i2c_device_id rv3029c2_id[] = { + { "rv3029c2", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, rv3029c2_id); + +static int rv3029c2_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct rtc_device *rtc; + int rc = 0; + u8 buf[1]; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_EMUL)) + return -ENODEV; + + rc = rv3029c2_i2c_get_sr(client, buf); + if (rc < 0) { + dev_err(&client->dev, "reading status failed\n"); + return rc; + } + + rtc = devm_rtc_device_register(&client->dev, client->name, + &rv3029c2_rtc_ops, THIS_MODULE); + + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + i2c_set_clientdata(client, rtc); + + return 0; +} + +static struct i2c_driver rv3029c2_driver = { + .driver = { + .name = "rtc-rv3029c2", + }, + .probe = rv3029c2_probe, + .id_table = rv3029c2_id, +}; + +module_i2c_driver(rv3029c2_driver); + +MODULE_AUTHOR("Gregory Hermant <gregory.hermant@calao-systems.com>"); +MODULE_DESCRIPTION("Micro Crystal RV3029C2 RTC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-rx4581.c b/drivers/rtc/rtc-rx4581.c new file mode 100644 index 00000000000..6889222f9ed --- /dev/null +++ b/drivers/rtc/rtc-rx4581.c @@ -0,0 +1,305 @@ +/* drivers/rtc/rtc-rx4581.c + * + * written by Torben Hohn <torbenh@linutronix.de> + * + * Based on: + * drivers/rtc/rtc-max6902.c + * + * Copyright (C) 2006 8D Technologies inc. + * Copyright (C) 2004 Compulab Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Driver for MAX6902 spi RTC + * + * and based on: + * drivers/rtc/rtc-rx8581.c + * + * An I2C driver for the Epson RX8581 RTC + * + * Author: Martyn Welch <martyn.welch@ge.com> + * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Based on: rtc-pcf8563.c (An I2C driver for the Philips PCF8563 RTC) + * Copyright 2005-06 Tower Technologies + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/spi/spi.h> +#include <linux/bcd.h> + +#define RX4581_REG_SC 0x00 /* Second in BCD */ +#define RX4581_REG_MN 0x01 /* Minute in BCD */ +#define RX4581_REG_HR 0x02 /* Hour in BCD */ +#define RX4581_REG_DW 0x03 /* Day of Week */ +#define RX4581_REG_DM 0x04 /* Day of Month in BCD */ +#define RX4581_REG_MO 0x05 /* Month in BCD */ +#define RX4581_REG_YR 0x06 /* Year in BCD */ +#define RX4581_REG_RAM 0x07 /* RAM */ +#define RX4581_REG_AMN 0x08 /* Alarm Min in BCD*/ +#define RX4581_REG_AHR 0x09 /* Alarm Hour in BCD */ +#define RX4581_REG_ADM 0x0A +#define RX4581_REG_ADW 0x0A +#define RX4581_REG_TMR0 0x0B +#define RX4581_REG_TMR1 0x0C +#define RX4581_REG_EXT 0x0D /* Extension Register */ +#define RX4581_REG_FLAG 0x0E /* Flag Register */ +#define RX4581_REG_CTRL 0x0F /* Control Register */ + + +/* Flag Register bit definitions */ +#define RX4581_FLAG_UF 0x20 /* Update */ +#define RX4581_FLAG_TF 0x10 /* Timer */ +#define RX4581_FLAG_AF 0x08 /* Alarm */ +#define RX4581_FLAG_VLF 0x02 /* Voltage Low */ + +/* Control Register bit definitions */ +#define RX4581_CTRL_UIE 0x20 /* Update Interrupt Enable */ +#define RX4581_CTRL_TIE 0x10 /* Timer Interrupt Enable */ +#define RX4581_CTRL_AIE 0x08 /* Alarm Interrupt Enable */ +#define RX4581_CTRL_STOP 0x02 /* STOP bit */ +#define RX4581_CTRL_RESET 0x01 /* RESET bit */ + +static int rx4581_set_reg(struct device *dev, unsigned char address, + unsigned char data) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char buf[2]; + + /* high nibble must be '0' to write */ + buf[0] = address & 0x0f; + buf[1] = data; + + return spi_write_then_read(spi, buf, 2, NULL, 0); +} + +static int rx4581_get_reg(struct device *dev, unsigned char address, + unsigned char *data) +{ + struct spi_device *spi = to_spi_device(dev); + + /* Set MSB to indicate read */ + *data = address | 0x80; + + return spi_write_then_read(spi, data, 1, data, 1); +} + +/* + * In the routines that deal directly with the rx8581 hardware, we use + * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. + */ +static int rx4581_get_datetime(struct device *dev, struct rtc_time *tm) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char date[7]; + unsigned char data; + int err; + + /* First we ensure that the "update flag" is not set, we read the + * time and date then re-read the "update flag". If the update flag + * has been set, we know that the time has changed during the read so + * we repeat the whole process again. + */ + err = rx4581_get_reg(dev, RX4581_REG_FLAG, &data); + if (err != 0) { + dev_err(dev, "Unable to read device flags\n"); + return -EIO; + } + + do { + /* If update flag set, clear it */ + if (data & RX4581_FLAG_UF) { + err = rx4581_set_reg(dev, + RX4581_REG_FLAG, (data & ~RX4581_FLAG_UF)); + if (err != 0) { + dev_err(dev, "Unable to write device " + "flags\n"); + return -EIO; + } + } + + /* Now read time and date */ + date[0] = 0x80; + err = spi_write_then_read(spi, date, 1, date, 7); + if (err < 0) { + dev_err(dev, "Unable to read date\n"); + return -EIO; + } + + /* Check flag register */ + err = rx4581_get_reg(dev, RX4581_REG_FLAG, &data); + if (err != 0) { + dev_err(dev, "Unable to read device flags\n"); + return -EIO; + } + } while (data & RX4581_FLAG_UF); + + if (data & RX4581_FLAG_VLF) + dev_info(dev, + "low voltage detected, date/time is not reliable.\n"); + + dev_dbg(dev, + "%s: raw data is sec=%02x, min=%02x, hr=%02x, " + "wday=%02x, mday=%02x, mon=%02x, year=%02x\n", + __func__, + date[0], date[1], date[2], date[3], date[4], date[5], date[6]); + + tm->tm_sec = bcd2bin(date[RX4581_REG_SC] & 0x7F); + tm->tm_min = bcd2bin(date[RX4581_REG_MN] & 0x7F); + tm->tm_hour = bcd2bin(date[RX4581_REG_HR] & 0x3F); /* rtc hr 0-23 */ + tm->tm_wday = ilog2(date[RX4581_REG_DW] & 0x7F); + tm->tm_mday = bcd2bin(date[RX4581_REG_DM] & 0x3F); + tm->tm_mon = bcd2bin(date[RX4581_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */ + tm->tm_year = bcd2bin(date[RX4581_REG_YR]); + if (tm->tm_year < 70) + tm->tm_year += 100; /* assume we are in 1970...2069 */ + + + dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " + "mday=%d, mon=%d, year=%d, wday=%d\n", + __func__, + tm->tm_sec, tm->tm_min, tm->tm_hour, + tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); + + err = rtc_valid_tm(tm); + if (err < 0) + dev_err(dev, "retrieved date/time is not valid.\n"); + + return err; +} + +static int rx4581_set_datetime(struct device *dev, struct rtc_time *tm) +{ + struct spi_device *spi = to_spi_device(dev); + int err; + unsigned char buf[8], data; + + dev_dbg(dev, "%s: secs=%d, mins=%d, hours=%d, " + "mday=%d, mon=%d, year=%d, wday=%d\n", + __func__, + tm->tm_sec, tm->tm_min, tm->tm_hour, + tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); + + buf[0] = 0x00; + /* hours, minutes and seconds */ + buf[RX4581_REG_SC+1] = bin2bcd(tm->tm_sec); + buf[RX4581_REG_MN+1] = bin2bcd(tm->tm_min); + buf[RX4581_REG_HR+1] = bin2bcd(tm->tm_hour); + + buf[RX4581_REG_DM+1] = bin2bcd(tm->tm_mday); + + /* month, 1 - 12 */ + buf[RX4581_REG_MO+1] = bin2bcd(tm->tm_mon + 1); + + /* year and century */ + buf[RX4581_REG_YR+1] = bin2bcd(tm->tm_year % 100); + buf[RX4581_REG_DW+1] = (0x1 << tm->tm_wday); + + /* Stop the clock */ + err = rx4581_get_reg(dev, RX4581_REG_CTRL, &data); + if (err != 0) { + dev_err(dev, "Unable to read control register\n"); + return -EIO; + } + + err = rx4581_set_reg(dev, RX4581_REG_CTRL, + (data | RX4581_CTRL_STOP)); + if (err != 0) { + dev_err(dev, "Unable to write control register\n"); + return -EIO; + } + + /* write register's data */ + err = spi_write_then_read(spi, buf, 8, NULL, 0); + if (err != 0) { + dev_err(dev, "Unable to write to date registers\n"); + return -EIO; + } + + /* get VLF and clear it */ + err = rx4581_get_reg(dev, RX4581_REG_FLAG, &data); + if (err != 0) { + dev_err(dev, "Unable to read flag register\n"); + return -EIO; + } + + err = rx4581_set_reg(dev, RX4581_REG_FLAG, + (data & ~(RX4581_FLAG_VLF))); + if (err != 0) { + dev_err(dev, "Unable to write flag register\n"); + return -EIO; + } + + /* Restart the clock */ + err = rx4581_get_reg(dev, RX4581_REG_CTRL, &data); + if (err != 0) { + dev_err(dev, "Unable to read control register\n"); + return -EIO; + } + + err = rx4581_set_reg(dev, RX4581_REG_CTRL, + (data & ~(RX4581_CTRL_STOP))); + if (err != 0) { + dev_err(dev, "Unable to write control register\n"); + return -EIO; + } + + return 0; +} + +static const struct rtc_class_ops rx4581_rtc_ops = { + .read_time = rx4581_get_datetime, + .set_time = rx4581_set_datetime, +}; + +static int rx4581_probe(struct spi_device *spi) +{ + struct rtc_device *rtc; + unsigned char tmp; + int res; + + res = rx4581_get_reg(&spi->dev, RX4581_REG_SC, &tmp); + if (res != 0) + return res; + + rtc = devm_rtc_device_register(&spi->dev, "rx4581", + &rx4581_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + spi_set_drvdata(spi, rtc); + return 0; +} + +static const struct spi_device_id rx4581_id[] = { + { "rx4581", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, rx4581_id); + +static struct spi_driver rx4581_driver = { + .driver = { + .name = "rtc-rx4581", + .owner = THIS_MODULE, + }, + .probe = rx4581_probe, + .id_table = rx4581_id, +}; + +module_spi_driver(rx4581_driver); + +MODULE_DESCRIPTION("rx4581 spi RTC driver"); +MODULE_AUTHOR("Torben Hohn"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:rtc-rx4581"); diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c index 1146e3522d3..e6298e02b40 100644 --- a/drivers/rtc/rtc-rx8025.c +++ b/drivers/rtc/rtc-rx8025.c @@ -424,37 +424,12 @@ static int rx8025_alarm_irq_enable(struct device *dev, unsigned int enabled) return 0; } -static int rx8025_irq_set_state(struct device *dev, int enabled) -{ - struct i2c_client *client = to_i2c_client(dev); - struct rx8025_data *rx8025 = i2c_get_clientdata(client); - int ctrl1; - int err; - - if (client->irq <= 0) - return -ENXIO; - - ctrl1 = rx8025->ctrl1 & ~RX8025_BIT_CTRL1_CT; - if (enabled) - ctrl1 |= RX8025_BIT_CTRL1_CT_1HZ; - if (ctrl1 != rx8025->ctrl1) { - rx8025->ctrl1 = ctrl1; - err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1, - rx8025->ctrl1); - if (err) - return err; - } - - return 0; -} - static struct rtc_class_ops rx8025_rtc_ops = { .read_time = rx8025_get_time, .set_time = rx8025_set_time, .read_alarm = rx8025_read_alarm, .set_alarm = rx8025_set_alarm, .alarm_irq_enable = rx8025_alarm_irq_enable, - .irq_set_state = rx8025_irq_set_state, }; /* @@ -559,8 +534,8 @@ static void rx8025_sysfs_unregister(struct device *dev) device_remove_file(dev, &dev_attr_clock_adjust_ppb); } -static int __devinit rx8025_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int rx8025_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); struct rx8025_data *rx8025; @@ -574,9 +549,8 @@ static int __devinit rx8025_probe(struct i2c_client *client, goto errout; } - rx8025 = kzalloc(sizeof(*rx8025), GFP_KERNEL); + rx8025 = devm_kzalloc(&client->dev, sizeof(*rx8025), GFP_KERNEL); if (!rx8025) { - dev_err(&adapter->dev, "failed to alloc memory\n"); err = -ENOMEM; goto errout; } @@ -587,7 +561,7 @@ static int __devinit rx8025_probe(struct i2c_client *client, err = rx8025_init_client(client, &need_reset); if (err) - goto errout_free; + goto errout; if (need_reset) { struct rtc_time tm; @@ -597,12 +571,12 @@ static int __devinit rx8025_probe(struct i2c_client *client, rx8025_set_time(&client->dev, &tm); } - rx8025->rtc = rtc_device_register(client->name, &client->dev, + rx8025->rtc = devm_rtc_device_register(&client->dev, client->name, &rx8025_rtc_ops, THIS_MODULE); if (IS_ERR(rx8025->rtc)) { err = PTR_ERR(rx8025->rtc); dev_err(&client->dev, "unable to register the class device\n"); - goto errout_free; + goto errout; } if (client->irq > 0) { @@ -611,7 +585,7 @@ static int __devinit rx8025_probe(struct i2c_client *client, 0, "rx8025", client); if (err) { dev_err(&client->dev, "unable to request IRQ\n"); - goto errout_reg; + goto errout; } } @@ -628,18 +602,12 @@ errout_irq: if (client->irq > 0) free_irq(client->irq, client); -errout_reg: - rtc_device_unregister(rx8025->rtc); - -errout_free: - kfree(rx8025); - errout: dev_err(&adapter->dev, "probing for rx8025 failed\n"); return err; } -static int __devexit rx8025_remove(struct i2c_client *client) +static int rx8025_remove(struct i2c_client *client) { struct rx8025_data *rx8025 = i2c_get_clientdata(client); struct mutex *lock = &rx8025->rtc->ops_lock; @@ -650,12 +618,10 @@ static int __devexit rx8025_remove(struct i2c_client *client) mutex_unlock(lock); free_irq(client->irq, client); - flush_scheduled_work(); + cancel_work_sync(&rx8025->work); } rx8025_sysfs_unregister(&client->dev); - rtc_device_unregister(rx8025->rtc); - kfree(rx8025); return 0; } @@ -665,23 +631,12 @@ static struct i2c_driver rx8025_driver = { .owner = THIS_MODULE, }, .probe = rx8025_probe, - .remove = __devexit_p(rx8025_remove), + .remove = rx8025_remove, .id_table = rx8025_id, }; -static int __init rx8025_init(void) -{ - return i2c_add_driver(&rx8025_driver); -} - -static void __exit rx8025_exit(void) -{ - i2c_del_driver(&rx8025_driver); -} +module_i2c_driver(rx8025_driver); MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>"); MODULE_DESCRIPTION("RX-8025 SA/NB RTC driver"); MODULE_LICENSE("GPL"); - -module_init(rx8025_init); -module_exit(rx8025_exit); diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c index 600b890a3c1..de8d9c42778 100644 --- a/drivers/rtc/rtc-rx8581.c +++ b/drivers/rtc/rtc-rx8581.c @@ -52,8 +52,45 @@ #define RX8581_CTRL_STOP 0x02 /* STOP bit */ #define RX8581_CTRL_RESET 0x01 /* RESET bit */ +struct rx8581 { + struct i2c_client *client; + struct rtc_device *rtc; + s32 (*read_block_data)(const struct i2c_client *client, u8 command, + u8 length, u8 *values); + s32 (*write_block_data)(const struct i2c_client *client, u8 command, + u8 length, const u8 *values); +}; + static struct i2c_driver rx8581_driver; +static int rx8581_read_block_data(const struct i2c_client *client, u8 command, + u8 length, u8 *values) +{ + s32 i, data; + + for (i = 0; i < length; i++) { + data = i2c_smbus_read_byte_data(client, command + i); + if (data < 0) + return data; + values[i] = data; + } + return i; +} + +static int rx8581_write_block_data(const struct i2c_client *client, u8 command, + u8 length, const u8 *values) +{ + s32 i, ret; + + for (i = 0; i < length; i++) { + ret = i2c_smbus_write_byte_data(client, command + i, + values[i]); + if (ret < 0) + return ret; + } + return length; +} + /* * In the routines that deal directly with the rx8581 hardware, we use * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. @@ -62,6 +99,7 @@ static int rx8581_get_datetime(struct i2c_client *client, struct rtc_time *tm) { unsigned char date[7]; int data, err; + struct rx8581 *rx8581 = i2c_get_clientdata(client); /* First we ensure that the "update flag" is not set, we read the * time and date then re-read the "update flag". If the update flag @@ -80,14 +118,13 @@ static int rx8581_get_datetime(struct i2c_client *client, struct rtc_time *tm) err = i2c_smbus_write_byte_data(client, RX8581_REG_FLAG, (data & ~RX8581_FLAG_UF)); if (err != 0) { - dev_err(&client->dev, "Unable to write device " - "flags\n"); + dev_err(&client->dev, "Unable to write device flags\n"); return -EIO; } } /* Now read time and date */ - err = i2c_smbus_read_i2c_block_data(client, RX8581_REG_SC, + err = rx8581->read_block_data(client, RX8581_REG_SC, 7, date); if (err < 0) { dev_err(&client->dev, "Unable to read date\n"); @@ -140,6 +177,7 @@ static int rx8581_set_datetime(struct i2c_client *client, struct rtc_time *tm) { int data, err; unsigned char buf[7]; + struct rx8581 *rx8581 = i2c_get_clientdata(client); dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, " "mday=%d, mon=%d, year=%d, wday=%d\n", @@ -176,7 +214,7 @@ static int rx8581_set_datetime(struct i2c_client *client, struct rtc_time *tm) } /* write register's data */ - err = i2c_smbus_write_i2c_block_data(client, RX8581_REG_SC, 7, buf); + err = rx8581->write_block_data(client, RX8581_REG_SC, 7, buf); if (err < 0) { dev_err(&client->dev, "Unable to write to date registers\n"); return -EIO; @@ -228,34 +266,42 @@ static const struct rtc_class_ops rx8581_rtc_ops = { .set_time = rx8581_rtc_set_time, }; -static int __devinit rx8581_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int rx8581_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - struct rtc_device *rtc; + struct rx8581 *rx8581; dev_dbg(&client->dev, "%s\n", __func__); - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) - return -ENODEV; - - dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA) + && !i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) + return -EIO; - rtc = rtc_device_register(rx8581_driver.driver.name, - &client->dev, &rx8581_rtc_ops, THIS_MODULE); + rx8581 = devm_kzalloc(&client->dev, sizeof(struct rx8581), GFP_KERNEL); + if (!rx8581) + return -ENOMEM; - if (IS_ERR(rtc)) - return PTR_ERR(rtc); + i2c_set_clientdata(client, rx8581); + rx8581->client = client; - i2c_set_clientdata(client, rtc); + if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { + rx8581->read_block_data = i2c_smbus_read_i2c_block_data; + rx8581->write_block_data = i2c_smbus_write_i2c_block_data; + } else { + rx8581->read_block_data = rx8581_read_block_data; + rx8581->write_block_data = rx8581_write_block_data; + } - return 0; -} + dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); -static int __devexit rx8581_remove(struct i2c_client *client) -{ - struct rtc_device *rtc = i2c_get_clientdata(client); + rx8581->rtc = devm_rtc_device_register(&client->dev, + rx8581_driver.driver.name, &rx8581_rtc_ops, THIS_MODULE); - rtc_device_unregister(rtc); + if (IS_ERR(rx8581->rtc)) { + dev_err(&client->dev, + "unable to register the class device\n"); + return PTR_ERR(rx8581->rtc); + } return 0; } @@ -272,24 +318,12 @@ static struct i2c_driver rx8581_driver = { .owner = THIS_MODULE, }, .probe = rx8581_probe, - .remove = __devexit_p(rx8581_remove), .id_table = rx8581_id, }; -static int __init rx8581_init(void) -{ - return i2c_add_driver(&rx8581_driver); -} - -static void __exit rx8581_exit(void) -{ - i2c_del_driver(&rx8581_driver); -} +module_i2c_driver(rx8581_driver); MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com>"); MODULE_DESCRIPTION("Epson RX-8581 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(rx8581_init); -module_exit(rx8581_exit); diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c index f789e002c9b..f40afdd0e5f 100644 --- a/drivers/rtc/rtc-s35390a.c +++ b/drivers/rtc/rtc-s35390a.c @@ -19,6 +19,8 @@ #define S35390A_CMD_STATUS1 0 #define S35390A_CMD_STATUS2 1 #define S35390A_CMD_TIME1 2 +#define S35390A_CMD_TIME2 3 +#define S35390A_CMD_INT2_REG1 5 #define S35390A_BYTE_YEAR 0 #define S35390A_BYTE_MONTH 1 @@ -28,12 +30,23 @@ #define S35390A_BYTE_MINS 5 #define S35390A_BYTE_SECS 6 +#define S35390A_ALRM_BYTE_WDAY 0 +#define S35390A_ALRM_BYTE_HOURS 1 +#define S35390A_ALRM_BYTE_MINS 2 + #define S35390A_FLAG_POC 0x01 #define S35390A_FLAG_BLD 0x02 #define S35390A_FLAG_24H 0x40 #define S35390A_FLAG_RESET 0x80 #define S35390A_FLAG_TEST 0x01 +#define S35390A_INT2_MODE_MASK 0xF0 + +#define S35390A_INT2_MODE_NOINTR 0x00 +#define S35390A_INT2_MODE_FREQ 0x10 +#define S35390A_INT2_MODE_ALARM 0x40 +#define S35390A_INT2_MODE_PMIN_EDG 0x20 + static const struct i2c_device_id s35390a_id[] = { { "s35390a", 0 }, { } @@ -50,7 +63,11 @@ static int s35390a_set_reg(struct s35390a *s35390a, int reg, char *buf, int len) { struct i2c_client *client = s35390a->client[reg]; struct i2c_msg msg[] = { - { client->addr, 0, len, buf }, + { + .addr = client->addr, + .len = len, + .buf = buf + }, }; if ((i2c_transfer(client->adapter, msg, 1)) != 1) @@ -63,7 +80,12 @@ static int s35390a_get_reg(struct s35390a *s35390a, int reg, char *buf, int len) { struct i2c_client *client = s35390a->client[reg]; struct i2c_msg msg[] = { - { client->addr, I2C_M_RD, len, buf }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = len, + .buf = buf + }, }; if ((i2c_transfer(client->adapter, msg, 1)) != 1) @@ -184,6 +206,104 @@ static int s35390a_get_datetime(struct i2c_client *client, struct rtc_time *tm) return rtc_valid_tm(tm); } +static int s35390a_set_alarm(struct i2c_client *client, struct rtc_wkalrm *alm) +{ + struct s35390a *s35390a = i2c_get_clientdata(client); + char buf[3], sts = 0; + int err, i; + + dev_dbg(&client->dev, "%s: alm is secs=%d, mins=%d, hours=%d mday=%d, "\ + "mon=%d, year=%d, wday=%d\n", __func__, alm->time.tm_sec, + alm->time.tm_min, alm->time.tm_hour, alm->time.tm_mday, + alm->time.tm_mon, alm->time.tm_year, alm->time.tm_wday); + + /* disable interrupt */ + err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts)); + if (err < 0) + return err; + + /* clear pending interrupt, if any */ + err = s35390a_get_reg(s35390a, S35390A_CMD_STATUS1, &sts, sizeof(sts)); + if (err < 0) + return err; + + if (alm->enabled) + sts = S35390A_INT2_MODE_ALARM; + else + sts = S35390A_INT2_MODE_NOINTR; + + /* This chip expects the bits of each byte to be in reverse order */ + sts = bitrev8(sts); + + /* set interupt mode*/ + err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts)); + if (err < 0) + return err; + + if (alm->time.tm_wday != -1) + buf[S35390A_ALRM_BYTE_WDAY] = bin2bcd(alm->time.tm_wday) | 0x80; + + buf[S35390A_ALRM_BYTE_HOURS] = s35390a_hr2reg(s35390a, + alm->time.tm_hour) | 0x80; + buf[S35390A_ALRM_BYTE_MINS] = bin2bcd(alm->time.tm_min) | 0x80; + + if (alm->time.tm_hour >= 12) + buf[S35390A_ALRM_BYTE_HOURS] |= 0x40; + + for (i = 0; i < 3; ++i) + buf[i] = bitrev8(buf[i]); + + err = s35390a_set_reg(s35390a, S35390A_CMD_INT2_REG1, buf, + sizeof(buf)); + + return err; +} + +static int s35390a_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alm) +{ + struct s35390a *s35390a = i2c_get_clientdata(client); + char buf[3], sts; + int i, err; + + err = s35390a_get_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts)); + if (err < 0) + return err; + + if (bitrev8(sts) != S35390A_INT2_MODE_ALARM) + return -EINVAL; + + err = s35390a_get_reg(s35390a, S35390A_CMD_INT2_REG1, buf, sizeof(buf)); + if (err < 0) + return err; + + /* This chip returns the bits of each byte in reverse order */ + for (i = 0; i < 3; ++i) { + buf[i] = bitrev8(buf[i]); + buf[i] &= ~0x80; + } + + alm->time.tm_wday = bcd2bin(buf[S35390A_ALRM_BYTE_WDAY]); + alm->time.tm_hour = s35390a_reg2hr(s35390a, + buf[S35390A_ALRM_BYTE_HOURS]); + alm->time.tm_min = bcd2bin(buf[S35390A_ALRM_BYTE_MINS]); + + dev_dbg(&client->dev, "%s: alm is mins=%d, hours=%d, wday=%d\n", + __func__, alm->time.tm_min, alm->time.tm_hour, + alm->time.tm_wday); + + return 0; +} + +static int s35390a_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + return s35390a_read_alarm(to_i2c_client(dev), alm); +} + +static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + return s35390a_set_alarm(to_i2c_client(dev), alm); +} + static int s35390a_rtc_read_time(struct device *dev, struct rtc_time *tm) { return s35390a_get_datetime(to_i2c_client(dev), tm); @@ -197,6 +317,9 @@ static int s35390a_rtc_set_time(struct device *dev, struct rtc_time *tm) static const struct rtc_class_ops s35390a_rtc_ops = { .read_time = s35390a_rtc_read_time, .set_time = s35390a_rtc_set_time, + .set_alarm = s35390a_rtc_set_alarm, + .read_alarm = s35390a_rtc_read_alarm, + }; static struct i2c_driver s35390a_driver; @@ -215,7 +338,8 @@ static int s35390a_probe(struct i2c_client *client, goto exit; } - s35390a = kzalloc(sizeof(struct s35390a), GFP_KERNEL); + s35390a = devm_kzalloc(&client->dev, sizeof(struct s35390a), + GFP_KERNEL); if (!s35390a) { err = -ENOMEM; goto exit; @@ -261,8 +385,11 @@ static int s35390a_probe(struct i2c_client *client, if (s35390a_get_datetime(client, &tm) < 0) dev_warn(&client->dev, "clock needs to be set\n"); - s35390a->rtc = rtc_device_register(s35390a_driver.driver.name, - &client->dev, &s35390a_rtc_ops, THIS_MODULE); + device_set_wakeup_capable(&client->dev, 1); + + s35390a->rtc = devm_rtc_device_register(&client->dev, + s35390a_driver.driver.name, + &s35390a_rtc_ops, THIS_MODULE); if (IS_ERR(s35390a->rtc)) { err = PTR_ERR(s35390a->rtc); @@ -274,7 +401,6 @@ exit_dummy: for (i = 1; i < 8; ++i) if (s35390a->client[i]) i2c_unregister_device(s35390a->client[i]); - kfree(s35390a); exit: return err; @@ -283,15 +409,12 @@ exit: static int s35390a_remove(struct i2c_client *client) { unsigned int i; - struct s35390a *s35390a = i2c_get_clientdata(client); + for (i = 1; i < 8; ++i) if (s35390a->client[i]) i2c_unregister_device(s35390a->client[i]); - rtc_device_unregister(s35390a->rtc); - kfree(s35390a); - return 0; } @@ -304,19 +427,8 @@ static struct i2c_driver s35390a_driver = { .id_table = s35390a_id, }; -static int __init s35390a_rtc_init(void) -{ - return i2c_add_driver(&s35390a_driver); -} - -static void __exit s35390a_rtc_exit(void) -{ - i2c_del_driver(&s35390a_driver); -} +module_i2c_driver(s35390a_driver); MODULE_AUTHOR("Byron Bradley <byron.bbradley@gmail.com>"); MODULE_DESCRIPTION("S35390A RTC driver"); MODULE_LICENSE("GPL"); - -module_init(s35390a_rtc_init); -module_exit(s35390a_rtc_exit); diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index cf953ecbfca..4958a363b2c 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -25,42 +25,72 @@ #include <linux/clk.h> #include <linux/log2.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/uaccess.h> +#include <linux/io.h> -#include <mach/hardware.h> -#include <asm/uaccess.h> -#include <asm/io.h> #include <asm/irq.h> -#include <plat/regs-rtc.h> +#include "rtc-s3c.h" enum s3c_cpu_type { TYPE_S3C2410, + TYPE_S3C2416, + TYPE_S3C2443, TYPE_S3C64XX, }; +struct s3c_rtc_drv_data { + int cpu_type; +}; + /* I have yet to find an S3C implementation with more than one * of these rtc blocks in */ -static struct resource *s3c_rtc_mem; - static struct clk *rtc_clk; static void __iomem *s3c_rtc_base; -static int s3c_rtc_alarmno = NO_IRQ; -static int s3c_rtc_tickno = NO_IRQ; +static int s3c_rtc_alarmno; +static int s3c_rtc_tickno; static enum s3c_cpu_type s3c_rtc_cpu_type; static DEFINE_SPINLOCK(s3c_rtc_pie_lock); +static void s3c_rtc_alarm_clk_enable(bool enable) +{ + static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock); + static bool alarm_clk_enabled; + unsigned long irq_flags; + + spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags); + if (enable) { + if (!alarm_clk_enabled) { + clk_enable(rtc_clk); + alarm_clk_enabled = true; + } + } else { + if (alarm_clk_enabled) { + clk_disable(rtc_clk); + alarm_clk_enabled = false; + } + } + spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags); +} + /* IRQ Handlers */ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) { struct rtc_device *rdev = id; + clk_enable(rtc_clk); rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF); if (s3c_rtc_cpu_type == TYPE_S3C64XX) writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP); + clk_disable(rtc_clk); + + s3c_rtc_alarm_clk_enable(false); + return IRQ_HANDLED; } @@ -68,56 +98,33 @@ static irqreturn_t s3c_rtc_tickirq(int irq, void *id) { struct rtc_device *rdev = id; + clk_enable(rtc_clk); rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF); if (s3c_rtc_cpu_type == TYPE_S3C64XX) writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP); + clk_disable(rtc_clk); return IRQ_HANDLED; } /* Update control registers */ -static void s3c_rtc_setaie(int to) +static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) { unsigned int tmp; - pr_debug("%s: aie=%d\n", __func__, to); + dev_dbg(dev, "%s: aie=%d\n", __func__, enabled); + clk_enable(rtc_clk); tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; - if (to) + if (enabled) tmp |= S3C2410_RTCALM_ALMEN; writeb(tmp, s3c_rtc_base + S3C2410_RTCALM); -} - -static int s3c_rtc_setpie(struct device *dev, int enabled) -{ - unsigned int tmp; - - pr_debug("%s: pie=%d\n", __func__, enabled); - - spin_lock_irq(&s3c_rtc_pie_lock); - - if (s3c_rtc_cpu_type == TYPE_S3C64XX) { - tmp = readw(s3c_rtc_base + S3C2410_RTCCON); - tmp &= ~S3C64XX_RTCCON_TICEN; - - if (enabled) - tmp |= S3C64XX_RTCCON_TICEN; - - writew(tmp, s3c_rtc_base + S3C2410_RTCCON); - } else { - tmp = readb(s3c_rtc_base + S3C2410_TICNT); - tmp &= ~S3C2410_TICNT_ENABLE; - - if (enabled) - tmp |= S3C2410_TICNT_ENABLE; - - writeb(tmp, s3c_rtc_base + S3C2410_TICNT); - } + clk_disable(rtc_clk); - spin_unlock_irq(&s3c_rtc_pie_lock); + s3c_rtc_alarm_clk_enable(enabled); return 0; } @@ -127,21 +134,34 @@ static int s3c_rtc_setfreq(struct device *dev, int freq) struct platform_device *pdev = to_platform_device(dev); struct rtc_device *rtc_dev = platform_get_drvdata(pdev); unsigned int tmp = 0; + int val; if (!is_power_of_2(freq)) return -EINVAL; + clk_enable(rtc_clk); spin_lock_irq(&s3c_rtc_pie_lock); - if (s3c_rtc_cpu_type == TYPE_S3C2410) { + if (s3c_rtc_cpu_type != TYPE_S3C64XX) { tmp = readb(s3c_rtc_base + S3C2410_TICNT); tmp &= S3C2410_TICNT_ENABLE; } - tmp |= (rtc_dev->max_user_freq / freq)-1; + val = (rtc_dev->max_user_freq / freq) - 1; + + if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) { + tmp |= S3C2443_TICNT_PART(val); + writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1); + + if (s3c_rtc_cpu_type == TYPE_S3C2416) + writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2); + } else { + tmp |= val; + } writel(tmp, s3c_rtc_base + S3C2410_TICNT); spin_unlock_irq(&s3c_rtc_pie_lock); + clk_disable(rtc_clk); return 0; } @@ -153,6 +173,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) unsigned int have_retried = 0; void __iomem *base = s3c_rtc_base; + clk_enable(rtc_clk); retry_get_time: rtc_tm->tm_min = readb(base + S3C2410_RTCMIN); rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR); @@ -161,7 +182,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR); rtc_tm->tm_sec = readb(base + S3C2410_RTCSEC); - /* the only way to work out wether the system was mid-update + /* the only way to work out whether the system was mid-update * when we read it is to check the second counter, and if it * is zero, then we re-try the entire read */ @@ -171,10 +192,6 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) goto retry_get_time; } - pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n", - 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, - rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); - rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec); rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min); rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour); @@ -183,8 +200,14 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); rtc_tm->tm_year += 100; + + dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n", + 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, + rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); + rtc_tm->tm_mon -= 1; + clk_disable(rtc_clk); return rtc_valid_tm(rtc_tm); } @@ -193,7 +216,7 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) void __iomem *base = s3c_rtc_base; int year = tm->tm_year - 100; - pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n", + dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n", 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); @@ -204,12 +227,14 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) return -EINVAL; } + clk_enable(rtc_clk); writeb(bin2bcd(tm->tm_sec), base + S3C2410_RTCSEC); writeb(bin2bcd(tm->tm_min), base + S3C2410_RTCMIN); writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR); writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE); writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON); writeb(bin2bcd(year), base + S3C2410_RTCYEAR); + clk_disable(rtc_clk); return 0; } @@ -220,6 +245,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) void __iomem *base = s3c_rtc_base; unsigned int alm_en; + clk_enable(rtc_clk); alm_tm->tm_sec = readb(base + S3C2410_ALMSEC); alm_tm->tm_min = readb(base + S3C2410_ALMMIN); alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR); @@ -231,7 +257,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; - pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n", + dev_dbg(dev, "read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n", alm_en, 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday, alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec); @@ -271,6 +297,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) else alm_tm->tm_year = -1; + clk_disable(rtc_clk); return 0; } @@ -280,12 +307,12 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) void __iomem *base = s3c_rtc_base; unsigned int alrm_en; - pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", + clk_enable(rtc_clk); + dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", alrm->enabled, - 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, + 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); - alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; writeb(0x00, base + S3C2410_RTCALM); @@ -304,12 +331,13 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR); } - pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en); + dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en); writeb(alrm_en, base + S3C2410_RTCALM); - s3c_rtc_setaie(alrm->enabled); + s3c_rtc_setaie(dev, alrm->enabled); + clk_disable(rtc_clk); return 0; } @@ -317,6 +345,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) { unsigned int ticnt; + clk_enable(rtc_clk); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { ticnt = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt &= S3C64XX_RTCCON_TICEN; @@ -326,59 +355,15 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) } seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); + clk_disable(rtc_clk); return 0; } -static int s3c_rtc_open(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc_dev = platform_get_drvdata(pdev); - int ret; - - ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq, - IRQF_DISABLED, "s3c2410-rtc alarm", rtc_dev); - - if (ret) { - dev_err(dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret); - return ret; - } - - ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq, - IRQF_DISABLED, "s3c2410-rtc tick", rtc_dev); - - if (ret) { - dev_err(dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret); - goto tick_err; - } - - return ret; - - tick_err: - free_irq(s3c_rtc_alarmno, rtc_dev); - return ret; -} - -static void s3c_rtc_release(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc_dev = platform_get_drvdata(pdev); - - /* do not clear AIE here, it may be needed for wake */ - - s3c_rtc_setpie(dev, 0); - free_irq(s3c_rtc_alarmno, rtc_dev); - free_irq(s3c_rtc_tickno, rtc_dev); -} - static const struct rtc_class_ops s3c_rtcops = { - .open = s3c_rtc_open, - .release = s3c_rtc_release, .read_time = s3c_rtc_gettime, .set_time = s3c_rtc_settime, .read_alarm = s3c_rtc_getalarm, .set_alarm = s3c_rtc_setalarm, - .irq_set_freq = s3c_rtc_setfreq, - .irq_set_state = s3c_rtc_setpie, .proc = s3c_rtc_proc, .alarm_irq_enable = s3c_rtc_setaie, }; @@ -391,6 +376,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) if (s3c_rtc_base == NULL) return; + clk_enable(rtc_clk); if (!en) { tmp = readw(base + S3C2410_RTCCON); if (s3c_rtc_cpu_type == TYPE_S3C64XX) @@ -398,7 +384,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) tmp &= ~S3C2410_RTCCON_RTCEN; writew(tmp, base + S3C2410_RTCCON); - if (s3c_rtc_cpu_type == TYPE_S3C2410) { + if (s3c_rtc_cpu_type != TYPE_S3C64XX) { tmp = readb(base + S3C2410_TICNT); tmp &= ~S3C2410_TICNT_ENABLE; writeb(tmp, base + S3C2410_TICNT); @@ -430,102 +416,91 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) base + S3C2410_RTCCON); } } + clk_disable(rtc_clk); } -static int __devexit s3c_rtc_remove(struct platform_device *dev) +static int s3c_rtc_remove(struct platform_device *dev) { - struct rtc_device *rtc = platform_get_drvdata(dev); - - platform_set_drvdata(dev, NULL); - rtc_device_unregister(rtc); + s3c_rtc_setaie(&dev->dev, 0); - s3c_rtc_setpie(&dev->dev, 0); - s3c_rtc_setaie(0); - - clk_disable(rtc_clk); - clk_put(rtc_clk); + clk_unprepare(rtc_clk); rtc_clk = NULL; - iounmap(s3c_rtc_base); - release_resource(s3c_rtc_mem); - kfree(s3c_rtc_mem); - return 0; } -static int __devinit s3c_rtc_probe(struct platform_device *pdev) +static const struct of_device_id s3c_rtc_dt_match[]; + +static inline int s3c_rtc_get_driver_data(struct platform_device *pdev) +{ +#ifdef CONFIG_OF + struct s3c_rtc_drv_data *data; + if (pdev->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node); + data = (struct s3c_rtc_drv_data *) match->data; + return data->cpu_type; + } +#endif + return platform_get_device_id(pdev)->driver_data; +} + +static int s3c_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; struct rtc_time rtc_tm; struct resource *res; int ret; + int tmp; - pr_debug("%s: probe=%p\n", __func__, pdev); + dev_dbg(&pdev->dev, "%s: probe=%p\n", __func__, pdev); /* find the IRQs */ s3c_rtc_tickno = platform_get_irq(pdev, 1); if (s3c_rtc_tickno < 0) { dev_err(&pdev->dev, "no irq for rtc tick\n"); - return -ENOENT; + return s3c_rtc_tickno; } s3c_rtc_alarmno = platform_get_irq(pdev, 0); if (s3c_rtc_alarmno < 0) { dev_err(&pdev->dev, "no irq for alarm\n"); - return -ENOENT; + return s3c_rtc_alarmno; } - pr_debug("s3c2410_rtc: tick irq %d, alarm irq %d\n", + dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n", s3c_rtc_tickno, s3c_rtc_alarmno); /* get the memory region */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "failed to get memory region resource\n"); - return -ENOENT; - } + s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(s3c_rtc_base)) + return PTR_ERR(s3c_rtc_base); - s3c_rtc_mem = request_mem_region(res->start, - res->end-res->start+1, - pdev->name); - - if (s3c_rtc_mem == NULL) { - dev_err(&pdev->dev, "failed to reserve memory region\n"); - ret = -ENOENT; - goto err_nores; - } - - s3c_rtc_base = ioremap(res->start, res->end - res->start + 1); - if (s3c_rtc_base == NULL) { - dev_err(&pdev->dev, "failed ioremap()\n"); - ret = -EINVAL; - goto err_nomap; - } - - rtc_clk = clk_get(&pdev->dev, "rtc"); + rtc_clk = devm_clk_get(&pdev->dev, "rtc"); if (IS_ERR(rtc_clk)) { dev_err(&pdev->dev, "failed to find rtc clock source\n"); ret = PTR_ERR(rtc_clk); rtc_clk = NULL; - goto err_clk; + return ret; } - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); /* check to see if everything is setup correctly */ s3c_rtc_enable(pdev, 1); - pr_debug("s3c2410_rtc: RTCCON=%02x\n", + dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", readw(s3c_rtc_base + S3C2410_RTCCON)); device_init_wakeup(&pdev->dev, 1); /* register RTC and exit */ - rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops, + rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, THIS_MODULE); if (IS_ERR(rtc)) { @@ -534,7 +509,7 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) goto err_nortc; } - s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data; + s3c_rtc_cpu_type = s3c_rtc_get_driver_data(pdev); /* Check RTC Time */ @@ -553,73 +528,133 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n"); } - if (s3c_rtc_cpu_type == TYPE_S3C64XX) + if (s3c_rtc_cpu_type != TYPE_S3C2410) rtc->max_user_freq = 32768; else rtc->max_user_freq = 128; + if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) { + tmp = readw(s3c_rtc_base + S3C2410_RTCCON); + tmp |= S3C2443_RTCCON_TICSEL; + writew(tmp, s3c_rtc_base + S3C2410_RTCCON); + } + platform_set_drvdata(pdev, rtc); s3c_rtc_setfreq(&pdev->dev, 1); - return 0; + ret = devm_request_irq(&pdev->dev, s3c_rtc_alarmno, s3c_rtc_alarmirq, + 0, "s3c2410-rtc alarm", rtc); + if (ret) { + dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret); + goto err_nortc; + } + + ret = devm_request_irq(&pdev->dev, s3c_rtc_tickno, s3c_rtc_tickirq, + 0, "s3c2410-rtc tick", rtc); + if (ret) { + dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret); + goto err_nortc; + } - err_nortc: - s3c_rtc_enable(pdev, 0); clk_disable(rtc_clk); - clk_put(rtc_clk); - err_clk: - iounmap(s3c_rtc_base); + return 0; - err_nomap: - release_resource(s3c_rtc_mem); + err_nortc: + s3c_rtc_enable(pdev, 0); + clk_disable_unprepare(rtc_clk); - err_nores: return ret; } -#ifdef CONFIG_PM - +#ifdef CONFIG_PM_SLEEP /* RTC Power management control */ static int ticnt_save, ticnt_en_save; +static bool wake_en; -static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) +static int s3c_rtc_suspend(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); + + clk_enable(rtc_clk); /* save TICNT for anyone using periodic interrupts */ - ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt_en_save &= S3C64XX_RTCCON_TICEN; + ticnt_save = readl(s3c_rtc_base + S3C2410_TICNT); + } else { + ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); } s3c_rtc_enable(pdev, 0); - if (device_may_wakeup(&pdev->dev)) - enable_irq_wake(s3c_rtc_alarmno); + if (device_may_wakeup(dev) && !wake_en) { + if (enable_irq_wake(s3c_rtc_alarmno) == 0) + wake_en = true; + else + dev_err(dev, "enable_irq_wake failed\n"); + } + clk_disable(rtc_clk); return 0; } -static int s3c_rtc_resume(struct platform_device *pdev) +static int s3c_rtc_resume(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); unsigned int tmp; + clk_enable(rtc_clk); s3c_rtc_enable(pdev, 1); - writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); - if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) { - tmp = readw(s3c_rtc_base + S3C2410_RTCCON); - writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); + if (s3c_rtc_cpu_type == TYPE_S3C64XX) { + writel(ticnt_save, s3c_rtc_base + S3C2410_TICNT); + if (ticnt_en_save) { + tmp = readw(s3c_rtc_base + S3C2410_RTCCON); + writew(tmp | ticnt_en_save, + s3c_rtc_base + S3C2410_RTCCON); + } + } else { + writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); } - if (device_may_wakeup(&pdev->dev)) + if (device_may_wakeup(dev) && wake_en) { disable_irq_wake(s3c_rtc_alarmno); + wake_en = false; + } + clk_disable(rtc_clk); return 0; } -#else -#define s3c_rtc_suspend NULL -#define s3c_rtc_resume NULL +#endif + +static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume); + +#ifdef CONFIG_OF +static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = { + [TYPE_S3C2410] = { TYPE_S3C2410 }, + [TYPE_S3C2416] = { TYPE_S3C2416 }, + [TYPE_S3C2443] = { TYPE_S3C2443 }, + [TYPE_S3C64XX] = { TYPE_S3C64XX }, +}; + +static const struct of_device_id s3c_rtc_dt_match[] = { + { + .compatible = "samsung,s3c2410-rtc", + .data = &s3c_rtc_drv_data_array[TYPE_S3C2410], + }, { + .compatible = "samsung,s3c2416-rtc", + .data = &s3c_rtc_drv_data_array[TYPE_S3C2416], + }, { + .compatible = "samsung,s3c2443-rtc", + .data = &s3c_rtc_drv_data_array[TYPE_S3C2443], + }, { + .compatible = "samsung,s3c6410-rtc", + .data = &s3c_rtc_drv_data_array[TYPE_S3C64XX], + }, + {}, +}; +MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match); #endif static struct platform_device_id s3c_rtc_driver_ids[] = { @@ -627,6 +662,12 @@ static struct platform_device_id s3c_rtc_driver_ids[] = { .name = "s3c2410-rtc", .driver_data = TYPE_S3C2410, }, { + .name = "s3c2416-rtc", + .driver_data = TYPE_S3C2416, + }, { + .name = "s3c2443-rtc", + .driver_data = TYPE_S3C2443, + }, { .name = "s3c64xx-rtc", .driver_data = TYPE_S3C64XX, }, @@ -637,31 +678,17 @@ MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids); static struct platform_driver s3c_rtc_driver = { .probe = s3c_rtc_probe, - .remove = __devexit_p(s3c_rtc_remove), - .suspend = s3c_rtc_suspend, - .resume = s3c_rtc_resume, + .remove = s3c_rtc_remove, .id_table = s3c_rtc_driver_ids, .driver = { .name = "s3c-rtc", .owner = THIS_MODULE, + .pm = &s3c_rtc_pm_ops, + .of_match_table = of_match_ptr(s3c_rtc_dt_match), }, }; -static char __initdata banner[] = "S3C24XX RTC, (c) 2004,2006 Simtec Electronics\n"; - -static int __init s3c_rtc_init(void) -{ - printk(banner); - return platform_driver_register(&s3c_rtc_driver); -} - -static void __exit s3c_rtc_exit(void) -{ - platform_driver_unregister(&s3c_rtc_driver); -} - -module_init(s3c_rtc_init); -module_exit(s3c_rtc_exit); +module_platform_driver(s3c_rtc_driver); MODULE_DESCRIPTION("Samsung S3C RTC Driver"); MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); diff --git a/drivers/rtc/rtc-s3c.h b/drivers/rtc/rtc-s3c.h new file mode 100644 index 00000000000..004b61a8343 --- /dev/null +++ b/drivers/rtc/rtc-s3c.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2003 Simtec Electronics <linux@simtec.co.uk> + * http://www.simtec.co.uk/products/SWLINUX/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * S3C2410 Internal RTC register definition +*/ + +#ifndef __ASM_ARCH_REGS_RTC_H +#define __ASM_ARCH_REGS_RTC_H __FILE__ + +#define S3C2410_RTCREG(x) (x) +#define S3C2410_INTP S3C2410_RTCREG(0x30) +#define S3C2410_INTP_ALM (1 << 1) +#define S3C2410_INTP_TIC (1 << 0) + +#define S3C2410_RTCCON S3C2410_RTCREG(0x40) +#define S3C2410_RTCCON_RTCEN (1 << 0) +#define S3C2410_RTCCON_CNTSEL (1 << 2) +#define S3C2410_RTCCON_CLKRST (1 << 3) +#define S3C2443_RTCCON_TICSEL (1 << 4) +#define S3C64XX_RTCCON_TICEN (1 << 8) + +#define S3C2410_TICNT S3C2410_RTCREG(0x44) +#define S3C2410_TICNT_ENABLE (1 << 7) + +/* S3C2443: tick count is 15 bit wide + * TICNT[6:0] contains upper 7 bits + * TICNT1[7:0] contains lower 8 bits + */ +#define S3C2443_TICNT_PART(x) ((x & 0x7f00) >> 8) +#define S3C2443_TICNT1 S3C2410_RTCREG(0x4C) +#define S3C2443_TICNT1_PART(x) (x & 0xff) + +/* S3C2416: tick count is 32 bit wide + * TICNT[6:0] contains bits [14:8] + * TICNT1[7:0] contains lower 8 bits + * TICNT2[16:0] contains upper 17 bits + */ +#define S3C2416_TICNT2 S3C2410_RTCREG(0x48) +#define S3C2416_TICNT2_PART(x) ((x & 0xffff8000) >> 15) + +#define S3C2410_RTCALM S3C2410_RTCREG(0x50) +#define S3C2410_RTCALM_ALMEN (1 << 6) +#define S3C2410_RTCALM_YEAREN (1 << 5) +#define S3C2410_RTCALM_MONEN (1 << 4) +#define S3C2410_RTCALM_DAYEN (1 << 3) +#define S3C2410_RTCALM_HOUREN (1 << 2) +#define S3C2410_RTCALM_MINEN (1 << 1) +#define S3C2410_RTCALM_SECEN (1 << 0) + +#define S3C2410_ALMSEC S3C2410_RTCREG(0x54) +#define S3C2410_ALMMIN S3C2410_RTCREG(0x58) +#define S3C2410_ALMHOUR S3C2410_RTCREG(0x5c) + +#define S3C2410_ALMDATE S3C2410_RTCREG(0x60) +#define S3C2410_ALMMON S3C2410_RTCREG(0x64) +#define S3C2410_ALMYEAR S3C2410_RTCREG(0x68) + +#define S3C2410_RTCSEC S3C2410_RTCREG(0x70) +#define S3C2410_RTCMIN S3C2410_RTCREG(0x74) +#define S3C2410_RTCHOUR S3C2410_RTCREG(0x78) +#define S3C2410_RTCDATE S3C2410_RTCREG(0x7c) +#define S3C2410_RTCMON S3C2410_RTCREG(0x84) +#define S3C2410_RTCYEAR S3C2410_RTCREG(0x88) + +#endif /* __ASM_ARCH_REGS_RTC_H */ diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c new file mode 100644 index 00000000000..8f06250a038 --- /dev/null +++ b/drivers/rtc/rtc-s5m.c @@ -0,0 +1,848 @@ +/* + * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd + * http://www.samsung.com + * + * Copyright (C) 2013 Google, Inc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/bcd.h> +#include <linux/regmap.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/mfd/samsung/core.h> +#include <linux/mfd/samsung/irq.h> +#include <linux/mfd/samsung/rtc.h> +#include <linux/mfd/samsung/s2mps14.h> + +/* + * Maximum number of retries for checking changes in UDR field + * of S5M_RTC_UDR_CON register (to limit possible endless loop). + * + * After writing to RTC registers (setting time or alarm) read the UDR field + * in S5M_RTC_UDR_CON register. UDR is auto-cleared when data have + * been transferred. + */ +#define UDR_READ_RETRY_CNT 5 + +/* Registers used by the driver which are different between chipsets. */ +struct s5m_rtc_reg_config { + /* Number of registers used for setting time/alarm0/alarm1 */ + unsigned int regs_count; + /* First register for time, seconds */ + unsigned int time; + /* RTC control register */ + unsigned int ctrl; + /* First register for alarm 0, seconds */ + unsigned int alarm0; + /* First register for alarm 1, seconds */ + unsigned int alarm1; + /* SMPL/WTSR register */ + unsigned int smpl_wtsr; + /* + * Register for update flag (UDR). Typically setting UDR field to 1 + * will enable update of time or alarm register. Then it will be + * auto-cleared after successful update. + */ + unsigned int rtc_udr_update; + /* Mask for UDR field in 'rtc_udr_update' register */ + unsigned int rtc_udr_mask; +}; + +/* Register map for S5M8763 and S5M8767 */ +static const struct s5m_rtc_reg_config s5m_rtc_regs = { + .regs_count = 8, + .time = S5M_RTC_SEC, + .ctrl = S5M_ALARM1_CONF, + .alarm0 = S5M_ALARM0_SEC, + .alarm1 = S5M_ALARM1_SEC, + .smpl_wtsr = S5M_WTSR_SMPL_CNTL, + .rtc_udr_update = S5M_RTC_UDR_CON, + .rtc_udr_mask = S5M_RTC_UDR_MASK, +}; + +/* + * Register map for S2MPS14. + * It may be also suitable for S2MPS11 but this was not tested. + */ +static const struct s5m_rtc_reg_config s2mps_rtc_regs = { + .regs_count = 7, + .time = S2MPS_RTC_SEC, + .ctrl = S2MPS_RTC_CTRL, + .alarm0 = S2MPS_ALARM0_SEC, + .alarm1 = S2MPS_ALARM1_SEC, + .smpl_wtsr = S2MPS_WTSR_SMPL_CNTL, + .rtc_udr_update = S2MPS_RTC_UDR_CON, + .rtc_udr_mask = S2MPS_RTC_WUDR_MASK, +}; + +struct s5m_rtc_info { + struct device *dev; + struct i2c_client *i2c; + struct sec_pmic_dev *s5m87xx; + struct regmap *regmap; + struct rtc_device *rtc_dev; + int irq; + int device_type; + int rtc_24hr_mode; + bool wtsr_smpl; + const struct s5m_rtc_reg_config *regs; +}; + +static const struct regmap_config s5m_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S5M_RTC_REG_MAX, +}; + +static const struct regmap_config s2mps14_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPS_RTC_REG_MAX, +}; + +static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm, + int rtc_24hr_mode) +{ + tm->tm_sec = data[RTC_SEC] & 0x7f; + tm->tm_min = data[RTC_MIN] & 0x7f; + if (rtc_24hr_mode) { + tm->tm_hour = data[RTC_HOUR] & 0x1f; + } else { + tm->tm_hour = data[RTC_HOUR] & 0x0f; + if (data[RTC_HOUR] & HOUR_PM_MASK) + tm->tm_hour += 12; + } + + tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f); + tm->tm_mday = data[RTC_DATE] & 0x1f; + tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; + tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100; + tm->tm_yday = 0; + tm->tm_isdst = 0; +} + +static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data) +{ + data[RTC_SEC] = tm->tm_sec; + data[RTC_MIN] = tm->tm_min; + + if (tm->tm_hour >= 12) + data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK; + else + data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK; + + data[RTC_WEEKDAY] = 1 << tm->tm_wday; + data[RTC_DATE] = tm->tm_mday; + data[RTC_MONTH] = tm->tm_mon + 1; + data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; + + if (tm->tm_year < 100) { + pr_err("s5m8767 RTC cannot handle the year %d.\n", + 1900 + tm->tm_year); + return -EINVAL; + } else { + return 0; + } +} + +/* + * Read RTC_UDR_CON register and wait till UDR field is cleared. + * This indicates that time/alarm update ended. + */ +static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info) +{ + int ret, retry = UDR_READ_RETRY_CNT; + unsigned int data; + + do { + ret = regmap_read(info->regmap, info->regs->rtc_udr_update, + &data); + } while (--retry && (data & info->regs->rtc_udr_mask) && !ret); + + if (!retry) + dev_err(info->dev, "waiting for UDR update, reached max number of retries\n"); + + return ret; +} + +static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info, + struct rtc_wkalrm *alarm) +{ + int ret; + unsigned int val; + + switch (info->device_type) { + case S5M8767X: + case S5M8763X: + ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val); + val &= S5M_ALARM0_STATUS; + break; + case S2MPS14X: + ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS14_REG_ST2, + &val); + val &= S2MPS_ALARM0_STATUS; + break; + default: + return -EINVAL; + } + if (ret < 0) + return ret; + + if (val) + alarm->pending = 1; + else + alarm->pending = 0; + + return 0; +} + +static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info) +{ + int ret; + unsigned int data; + + ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data); + if (ret < 0) { + dev_err(info->dev, "failed to read update reg(%d)\n", ret); + return ret; + } + + data |= info->regs->rtc_udr_mask; + if (info->device_type == S5M8763X || info->device_type == S5M8767X) + data |= S5M_RTC_TIME_EN_MASK; + + ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); + if (ret < 0) { + dev_err(info->dev, "failed to write update reg(%d)\n", ret); + return ret; + } + + ret = s5m8767_wait_for_udr_update(info); + + return ret; +} + +static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info) +{ + int ret; + unsigned int data; + + ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read update reg(%d)\n", + __func__, ret); + return ret; + } + + data |= info->regs->rtc_udr_mask; + switch (info->device_type) { + case S5M8763X: + case S5M8767X: + data &= ~S5M_RTC_TIME_EN_MASK; + break; + case S2MPS14X: + data |= S2MPS_RTC_RUDR_MASK; + break; + default: + return -EINVAL; + } + + ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write update reg(%d)\n", + __func__, ret); + return ret; + } + + ret = s5m8767_wait_for_udr_update(info); + + return ret; +} + +static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm) +{ + tm->tm_sec = bcd2bin(data[RTC_SEC]); + tm->tm_min = bcd2bin(data[RTC_MIN]); + + if (data[RTC_HOUR] & HOUR_12) { + tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f); + if (data[RTC_HOUR] & HOUR_PM) + tm->tm_hour += 12; + } else { + tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f); + } + + tm->tm_wday = data[RTC_WEEKDAY] & 0x07; + tm->tm_mday = bcd2bin(data[RTC_DATE]); + tm->tm_mon = bcd2bin(data[RTC_MONTH]); + tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100; + tm->tm_year -= 1900; +} + +static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data) +{ + data[RTC_SEC] = bin2bcd(tm->tm_sec); + data[RTC_MIN] = bin2bcd(tm->tm_min); + data[RTC_HOUR] = bin2bcd(tm->tm_hour); + data[RTC_WEEKDAY] = tm->tm_wday; + data[RTC_DATE] = bin2bcd(tm->tm_mday); + data[RTC_MONTH] = bin2bcd(tm->tm_mon); + data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100); + data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100); +} + +static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + u8 data[info->regs->regs_count]; + int ret; + + if (info->device_type == S2MPS14X) { + ret = regmap_update_bits(info->regmap, + info->regs->rtc_udr_update, + S2MPS_RTC_RUDR_MASK, S2MPS_RTC_RUDR_MASK); + if (ret) { + dev_err(dev, + "Failed to prepare registers for time reading: %d\n", + ret); + return ret; + } + } + ret = regmap_bulk_read(info->regmap, info->regs->time, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + switch (info->device_type) { + case S5M8763X: + s5m8763_data_to_tm(data, tm); + break; + + case S5M8767X: + case S2MPS14X: + s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode); + break; + + default: + return -EINVAL; + } + + dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, + 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); + + return rtc_valid_tm(tm); +} + +static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + u8 data[info->regs->regs_count]; + int ret = 0; + + switch (info->device_type) { + case S5M8763X: + s5m8763_tm_to_data(tm, data); + break; + case S5M8767X: + case S2MPS14X: + ret = s5m8767_tm_to_data(tm, data); + break; + default: + return -EINVAL; + } + + if (ret < 0) + return ret; + + dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, + 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); + + ret = regmap_raw_write(info->regmap, info->regs->time, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + ret = s5m8767_rtc_set_time_reg(info); + + return ret; +} + +static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + u8 data[info->regs->regs_count]; + unsigned int val; + int ret, i; + + ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + switch (info->device_type) { + case S5M8763X: + s5m8763_data_to_tm(data, &alrm->time); + ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val); + if (ret < 0) + return ret; + + alrm->enabled = !!val; + break; + + case S5M8767X: + case S2MPS14X: + s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); + alrm->enabled = 0; + for (i = 0; i < info->regs->regs_count; i++) { + if (data[i] & ALARM_ENABLE_MASK) { + alrm->enabled = 1; + break; + } + } + break; + + default: + return -EINVAL; + } + + dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, + 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, + alrm->time.tm_mday, alrm->time.tm_hour, + alrm->time.tm_min, alrm->time.tm_sec, + alrm->time.tm_wday); + + ret = s5m_check_peding_alarm_interrupt(info, alrm); + + return 0; +} + +static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info) +{ + u8 data[info->regs->regs_count]; + int ret, i; + struct rtc_time tm; + + ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); + dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, + 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); + + switch (info->device_type) { + case S5M8763X: + ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0); + break; + + case S5M8767X: + case S2MPS14X: + for (i = 0; i < info->regs->regs_count; i++) + data[i] &= ~ALARM_ENABLE_MASK; + + ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + ret = s5m8767_rtc_set_alarm_reg(info); + + break; + + default: + return -EINVAL; + } + + return ret; +} + +static int s5m_rtc_start_alarm(struct s5m_rtc_info *info) +{ + int ret; + u8 data[info->regs->regs_count]; + u8 alarm0_conf; + struct rtc_time tm; + + ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); + dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, + 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); + + switch (info->device_type) { + case S5M8763X: + alarm0_conf = 0x77; + ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf); + break; + + case S5M8767X: + case S2MPS14X: + data[RTC_SEC] |= ALARM_ENABLE_MASK; + data[RTC_MIN] |= ALARM_ENABLE_MASK; + data[RTC_HOUR] |= ALARM_ENABLE_MASK; + data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; + if (data[RTC_DATE] & 0x1f) + data[RTC_DATE] |= ALARM_ENABLE_MASK; + if (data[RTC_MONTH] & 0xf) + data[RTC_MONTH] |= ALARM_ENABLE_MASK; + if (data[RTC_YEAR1] & 0x7f) + data[RTC_YEAR1] |= ALARM_ENABLE_MASK; + + ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, + info->regs->regs_count); + if (ret < 0) + return ret; + ret = s5m8767_rtc_set_alarm_reg(info); + + break; + + default: + return -EINVAL; + } + + return ret; +} + +static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + u8 data[info->regs->regs_count]; + int ret; + + switch (info->device_type) { + case S5M8763X: + s5m8763_tm_to_data(&alrm->time, data); + break; + + case S5M8767X: + case S2MPS14X: + s5m8767_tm_to_data(&alrm->time, data); + break; + + default: + return -EINVAL; + } + + dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, + 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, + alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min, + alrm->time.tm_sec, alrm->time.tm_wday); + + ret = s5m_rtc_stop_alarm(info); + if (ret < 0) + return ret; + + ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, + info->regs->regs_count); + if (ret < 0) + return ret; + + ret = s5m8767_rtc_set_alarm_reg(info); + if (ret < 0) + return ret; + + if (alrm->enabled) + ret = s5m_rtc_start_alarm(info); + + return ret; +} + +static int s5m_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + + if (enabled) + return s5m_rtc_start_alarm(info); + else + return s5m_rtc_stop_alarm(info); +} + +static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data) +{ + struct s5m_rtc_info *info = data; + + rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops s5m_rtc_ops = { + .read_time = s5m_rtc_read_time, + .set_time = s5m_rtc_set_time, + .read_alarm = s5m_rtc_read_alarm, + .set_alarm = s5m_rtc_set_alarm, + .alarm_irq_enable = s5m_rtc_alarm_irq_enable, +}; + +static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable) +{ + int ret; + ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr, + WTSR_ENABLE_MASK, + enable ? WTSR_ENABLE_MASK : 0); + if (ret < 0) + dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", + __func__, ret); +} + +static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable) +{ + int ret; + ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr, + SMPL_ENABLE_MASK, + enable ? SMPL_ENABLE_MASK : 0); + if (ret < 0) + dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", + __func__, ret); +} + +static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) +{ + u8 data[2]; + int ret; + + switch (info->device_type) { + case S5M8763X: + case S5M8767X: + /* UDR update time. Default of 7.32 ms is too long. */ + ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON, + S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US); + if (ret < 0) + dev_err(info->dev, "%s: fail to change UDR time: %d\n", + __func__, ret); + + /* Set RTC control register : Binary mode, 24hour mode */ + data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + + ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2); + break; + + case S2MPS14X: + data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + ret = regmap_write(info->regmap, info->regs->ctrl, data[0]); + break; + + default: + return -EINVAL; + } + + info->rtc_24hr_mode = 1; + if (ret < 0) { + dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", + __func__, ret); + return ret; + } + + return ret; +} + +static int s5m_rtc_probe(struct platform_device *pdev) +{ + struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent); + struct sec_platform_data *pdata = s5m87xx->pdata; + struct s5m_rtc_info *info; + const struct regmap_config *regmap_cfg; + int ret, alarm_irq; + + if (!pdata) { + dev_err(pdev->dev.parent, "Platform data not supplied\n"); + return -ENODEV; + } + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + switch (pdata->device_type) { + case S2MPS14X: + regmap_cfg = &s2mps14_rtc_regmap_config; + info->regs = &s2mps_rtc_regs; + alarm_irq = S2MPS14_IRQ_RTCA0; + break; + case S5M8763X: + regmap_cfg = &s5m_rtc_regmap_config; + info->regs = &s5m_rtc_regs; + alarm_irq = S5M8763_IRQ_ALARM0; + break; + case S5M8767X: + regmap_cfg = &s5m_rtc_regmap_config; + info->regs = &s5m_rtc_regs; + alarm_irq = S5M8767_IRQ_RTCA1; + break; + default: + dev_err(&pdev->dev, "Device type is not supported by RTC driver\n"); + return -ENODEV; + } + + info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR); + if (!info->i2c) { + dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n"); + return -ENODEV; + } + + info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg); + if (IS_ERR(info->regmap)) { + ret = PTR_ERR(info->regmap); + dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n", + ret); + goto err; + } + + info->dev = &pdev->dev; + info->s5m87xx = s5m87xx; + info->device_type = s5m87xx->device_type; + info->wtsr_smpl = s5m87xx->wtsr_smpl; + + info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq); + if (info->irq <= 0) { + ret = -EINVAL; + dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n", + alarm_irq); + goto err; + } + + platform_set_drvdata(pdev, info); + + ret = s5m8767_rtc_init_reg(info); + + if (info->wtsr_smpl) { + s5m_rtc_enable_wtsr(info, true); + s5m_rtc_enable_smpl(info, true); + } + + device_init_wakeup(&pdev->dev, 1); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc", + &s5m_rtc_ops, THIS_MODULE); + + if (IS_ERR(info->rtc_dev)) { + ret = PTR_ERR(info->rtc_dev); + goto err; + } + + ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, + s5m_rtc_alarm_irq, 0, "rtc-alarm0", + info); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", + info->irq, ret); + goto err; + } + + return 0; + +err: + i2c_unregister_device(info->i2c); + + return ret; +} + +static void s5m_rtc_shutdown(struct platform_device *pdev) +{ + struct s5m_rtc_info *info = platform_get_drvdata(pdev); + int i; + unsigned int val = 0; + if (info->wtsr_smpl) { + for (i = 0; i < 3; i++) { + s5m_rtc_enable_wtsr(info, false); + regmap_read(info->regmap, info->regs->smpl_wtsr, &val); + pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); + if (val & WTSR_ENABLE_MASK) + pr_emerg("%s: fail to disable WTSR\n", + __func__); + else { + pr_info("%s: success to disable WTSR\n", + __func__); + break; + } + } + } + /* Disable SMPL when power off */ + s5m_rtc_enable_smpl(info, false); +} + +static int s5m_rtc_remove(struct platform_device *pdev) +{ + struct s5m_rtc_info *info = platform_get_drvdata(pdev); + + /* Perform also all shutdown steps when removing */ + s5m_rtc_shutdown(pdev); + i2c_unregister_device(info->i2c); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int s5m_rtc_resume(struct device *dev) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (device_may_wakeup(dev)) + ret = disable_irq_wake(info->irq); + + return ret; +} + +static int s5m_rtc_suspend(struct device *dev) +{ + struct s5m_rtc_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (device_may_wakeup(dev)) + ret = enable_irq_wake(info->irq); + + return ret; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume); + +static const struct platform_device_id s5m_rtc_id[] = { + { "s5m-rtc", S5M8767X }, + { "s2mps14-rtc", S2MPS14X }, +}; + +static struct platform_driver s5m_rtc_driver = { + .driver = { + .name = "s5m-rtc", + .owner = THIS_MODULE, + .pm = &s5m_rtc_pm_ops, + }, + .probe = s5m_rtc_probe, + .remove = s5m_rtc_remove, + .shutdown = s5m_rtc_shutdown, + .id_table = s5m_rtc_id, +}; + +module_platform_driver(s5m_rtc_driver); + +/* Module information */ +MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); +MODULE_DESCRIPTION("Samsung S5M/S2MPS14 RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:s5m-rtc"); diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index e4a44b64170..b6e1ca08c2c 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -23,100 +23,66 @@ #include <linux/platform_device.h> #include <linux/module.h> +#include <linux/clk.h> #include <linux/rtc.h> #include <linux/init.h> #include <linux/fs.h> #include <linux/interrupt.h> +#include <linux/slab.h> #include <linux/string.h> +#include <linux/of.h> #include <linux/pm.h> #include <linux/bitops.h> +#include <linux/io.h> #include <mach/hardware.h> -#include <asm/irq.h> +#include <mach/irqs.h> -#ifdef CONFIG_ARCH_PXA +#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP) #include <mach/regs-rtc.h> -#include <mach/regs-ost.h> #endif -#define RTC_DEF_DIVIDER 32768 - 1 +#define RTC_DEF_DIVIDER (32768 - 1) #define RTC_DEF_TRIM 0 - -static unsigned long rtc_freq = 1024; -static unsigned long timer_freq; -static struct rtc_time rtc_alarm; -static DEFINE_SPINLOCK(sa1100_rtc_lock); - -static inline int rtc_periodic_alarm(struct rtc_time *tm) -{ - return (tm->tm_year == -1) || - ((unsigned)tm->tm_mon >= 12) || - ((unsigned)(tm->tm_mday - 1) >= 31) || - ((unsigned)tm->tm_hour > 23) || - ((unsigned)tm->tm_min > 59) || - ((unsigned)tm->tm_sec > 59); -} - -/* - * Calculate the next alarm time given the requested alarm time mask - * and the current time. - */ -static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc_time *alrm) -{ - unsigned long next_time; - unsigned long now_time; - - next->tm_year = now->tm_year; - next->tm_mon = now->tm_mon; - next->tm_mday = now->tm_mday; - next->tm_hour = alrm->tm_hour; - next->tm_min = alrm->tm_min; - next->tm_sec = alrm->tm_sec; - - rtc_tm_to_time(now, &now_time); - rtc_tm_to_time(next, &next_time); - - if (next_time < now_time) { - /* Advance one day */ - next_time += 60 * 60 * 24; - rtc_time_to_tm(next_time, next); - } -} - -static int rtc_update_alarm(struct rtc_time *alrm) -{ - struct rtc_time alarm_tm, now_tm; - unsigned long now, time; - int ret; - - do { - now = RCNR; - rtc_time_to_tm(now, &now_tm); - rtc_next_alarm_time(&alarm_tm, &now_tm, alrm); - ret = rtc_tm_to_time(&alarm_tm, &time); - if (ret != 0) - break; - - RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL); - RTAR = time; - } while (now != RCNR); - - return ret; -} +#define RTC_FREQ 1024 + +struct sa1100_rtc { + spinlock_t lock; + int irq_1hz; + int irq_alarm; + struct rtc_device *rtc; + struct clk *clk; +}; static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) { - struct platform_device *pdev = to_platform_device(dev_id); - struct rtc_device *rtc = platform_get_drvdata(pdev); + struct sa1100_rtc *info = dev_get_drvdata(dev_id); + struct rtc_device *rtc = info->rtc; unsigned int rtsr; unsigned long events = 0; - spin_lock(&sa1100_rtc_lock); + spin_lock(&info->lock); rtsr = RTSR; /* clear interrupt sources */ RTSR = 0; - RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2); + /* Fix for a nasty initialization problem the in SA11xx RTSR register. + * See also the comments in sa1100_rtc_probe(). */ + if (rtsr & (RTSR_ALE | RTSR_HZE)) { + /* This is the original code, before there was the if test + * above. This code does not clear interrupts that were not + * enabled. */ + RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2); + } else { + /* For some reason, it is possible to enter this routine + * without interruptions enabled, it has been tested with + * several units (Bug in SA11xx chip?). + * + * This situation leads to an infinite "loop" of interrupt + * routine calling and as a result the processor seems to + * lock on its first call to open(). */ + RTSR = RTSR_AL | RTSR_HZ; + } /* clear alarm interrupt if it has occurred */ if (rtsr & RTSR_AL) @@ -131,153 +97,62 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) rtc_update_irq(rtc, 1, events); - if (rtsr & RTSR_AL && rtc_periodic_alarm(&rtc_alarm)) - rtc_update_alarm(&rtc_alarm); - - spin_unlock(&sa1100_rtc_lock); - - return IRQ_HANDLED; -} - -static int rtc_timer1_count; - -static irqreturn_t timer1_interrupt(int irq, void *dev_id) -{ - struct platform_device *pdev = to_platform_device(dev_id); - struct rtc_device *rtc = platform_get_drvdata(pdev); - - /* - * If we match for the first time, rtc_timer1_count will be 1. - * Otherwise, we wrapped around (very unlikely but - * still possible) so compute the amount of missed periods. - * The match reg is updated only when the data is actually retrieved - * to avoid unnecessary interrupts. - */ - OSSR = OSSR_M1; /* clear match on timer1 */ - - rtc_update_irq(rtc, rtc_timer1_count, RTC_PF | RTC_IRQF); - - if (rtc_timer1_count == 1) - rtc_timer1_count = (rtc_freq * ((1 << 30) / (timer_freq >> 2))); + spin_unlock(&info->lock); return IRQ_HANDLED; } -static int sa1100_rtc_read_callback(struct device *dev, int data) -{ - if (data & RTC_PF) { - /* interpolate missed periods and set match for the next */ - unsigned long period = timer_freq / rtc_freq; - unsigned long oscr = OSCR; - unsigned long osmr1 = OSMR1; - unsigned long missed = (oscr - osmr1)/period; - data += missed << 8; - OSSR = OSSR_M1; /* clear match on timer 1 */ - OSMR1 = osmr1 + (missed + 1)*period; - /* Ensure we didn't miss another match in the mean time. - * Here we compare (match - OSCR) 8 instead of 0 -- - * see comment in pxa_timer_interrupt() for explanation. - */ - while( (signed long)((osmr1 = OSMR1) - OSCR) <= 8 ) { - data += 0x100; - OSSR = OSSR_M1; /* clear match on timer 1 */ - OSMR1 = osmr1 + period; - } - } - return data; -} - static int sa1100_rtc_open(struct device *dev) { + struct sa1100_rtc *info = dev_get_drvdata(dev); + struct rtc_device *rtc = info->rtc; int ret; - ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, IRQF_DISABLED, - "rtc 1Hz", dev); + ret = request_irq(info->irq_1hz, sa1100_rtc_interrupt, 0, "rtc 1Hz", dev); if (ret) { - dev_err(dev, "IRQ %d already in use.\n", IRQ_RTC1Hz); + dev_err(dev, "IRQ %d already in use.\n", info->irq_1hz); goto fail_ui; } - ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, IRQF_DISABLED, - "rtc Alrm", dev); + ret = request_irq(info->irq_alarm, sa1100_rtc_interrupt, 0, "rtc Alrm", dev); if (ret) { - dev_err(dev, "IRQ %d already in use.\n", IRQ_RTCAlrm); + dev_err(dev, "IRQ %d already in use.\n", info->irq_alarm); goto fail_ai; } - ret = request_irq(IRQ_OST1, timer1_interrupt, IRQF_DISABLED, - "rtc timer", dev); - if (ret) { - dev_err(dev, "IRQ %d already in use.\n", IRQ_OST1); - goto fail_pi; - } + rtc->max_user_freq = RTC_FREQ; + rtc_irq_set_freq(rtc, NULL, RTC_FREQ); + return 0; - fail_pi: - free_irq(IRQ_RTCAlrm, dev); fail_ai: - free_irq(IRQ_RTC1Hz, dev); + free_irq(info->irq_1hz, dev); fail_ui: + clk_disable_unprepare(info->clk); return ret; } static void sa1100_rtc_release(struct device *dev) { - spin_lock_irq(&sa1100_rtc_lock); + struct sa1100_rtc *info = dev_get_drvdata(dev); + + spin_lock_irq(&info->lock); RTSR = 0; - OIER &= ~OIER_E1; - OSSR = OSSR_M1; - spin_unlock_irq(&sa1100_rtc_lock); + spin_unlock_irq(&info->lock); - free_irq(IRQ_OST1, dev); - free_irq(IRQ_RTCAlrm, dev); - free_irq(IRQ_RTC1Hz, dev); + free_irq(info->irq_alarm, dev); + free_irq(info->irq_1hz, dev); } - -static int sa1100_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { - switch(cmd) { - case RTC_AIE_OFF: - spin_lock_irq(&sa1100_rtc_lock); - RTSR &= ~RTSR_ALE; - spin_unlock_irq(&sa1100_rtc_lock); - return 0; - case RTC_AIE_ON: - spin_lock_irq(&sa1100_rtc_lock); + struct sa1100_rtc *info = dev_get_drvdata(dev); + + spin_lock_irq(&info->lock); + if (enabled) RTSR |= RTSR_ALE; - spin_unlock_irq(&sa1100_rtc_lock); - return 0; - case RTC_UIE_OFF: - spin_lock_irq(&sa1100_rtc_lock); - RTSR &= ~RTSR_HZE; - spin_unlock_irq(&sa1100_rtc_lock); - return 0; - case RTC_UIE_ON: - spin_lock_irq(&sa1100_rtc_lock); - RTSR |= RTSR_HZE; - spin_unlock_irq(&sa1100_rtc_lock); - return 0; - case RTC_PIE_OFF: - spin_lock_irq(&sa1100_rtc_lock); - OIER &= ~OIER_E1; - spin_unlock_irq(&sa1100_rtc_lock); - return 0; - case RTC_PIE_ON: - spin_lock_irq(&sa1100_rtc_lock); - OSMR1 = timer_freq / rtc_freq + OSCR; - OIER |= OIER_E1; - rtc_timer1_count = 1; - spin_unlock_irq(&sa1100_rtc_lock); - return 0; - case RTC_IRQP_READ: - return put_user(rtc_freq, (unsigned long *)arg); - case RTC_IRQP_SET: - if (arg < 1 || arg > timer_freq) - return -EINVAL; - rtc_freq = arg; - return 0; - } - return -ENOIOCTLCMD; + else + RTSR &= ~RTSR_ALE; + spin_unlock_irq(&info->lock); + return 0; } static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm) @@ -301,7 +176,6 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { u32 rtsr; - memcpy(&alrm->time, &rtc_alarm, sizeof(struct rtc_time)); rtsr = RTSR; alrm->enabled = (rtsr & RTSR_ALE) ? 1 : 0; alrm->pending = (rtsr & RTSR_AL) ? 1 : 0; @@ -310,51 +184,72 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { + struct sa1100_rtc *info = dev_get_drvdata(dev); + unsigned long time; int ret; - spin_lock_irq(&sa1100_rtc_lock); - ret = rtc_update_alarm(&alrm->time); - if (ret == 0) { - if (alrm->enabled) - RTSR |= RTSR_ALE; - else - RTSR &= ~RTSR_ALE; - } - spin_unlock_irq(&sa1100_rtc_lock); + spin_lock_irq(&info->lock); + ret = rtc_tm_to_time(&alrm->time, &time); + if (ret != 0) + goto out; + RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL); + RTAR = time; + if (alrm->enabled) + RTSR |= RTSR_ALE; + else + RTSR &= ~RTSR_ALE; +out: + spin_unlock_irq(&info->lock); return ret; } static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq) { - seq_printf(seq, "trim/divider\t: 0x%08x\n", (u32) RTTR); - seq_printf(seq, "update_IRQ\t: %s\n", - (RTSR & RTSR_HZE) ? "yes" : "no"); - seq_printf(seq, "periodic_IRQ\t: %s\n", - (OIER & OIER_E1) ? "yes" : "no"); - seq_printf(seq, "periodic_freq\t: %ld\n", rtc_freq); + seq_printf(seq, "trim/divider\t\t: 0x%08x\n", (u32) RTTR); + seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", (u32)RTSR); return 0; } static const struct rtc_class_ops sa1100_rtc_ops = { .open = sa1100_rtc_open, - .read_callback = sa1100_rtc_read_callback, .release = sa1100_rtc_release, - .ioctl = sa1100_rtc_ioctl, .read_time = sa1100_rtc_read_time, .set_time = sa1100_rtc_set_time, .read_alarm = sa1100_rtc_read_alarm, .set_alarm = sa1100_rtc_set_alarm, .proc = sa1100_rtc_proc, + .alarm_irq_enable = sa1100_rtc_alarm_irq_enable, }; static int sa1100_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; - - timer_freq = get_clock_tick_rate(); - + struct sa1100_rtc *info; + int irq_1hz, irq_alarm, ret = 0; + + irq_1hz = platform_get_irq_byname(pdev, "rtc 1Hz"); + irq_alarm = platform_get_irq_byname(pdev, "rtc alarm"); + if (irq_1hz < 0 || irq_alarm < 0) + return -ENODEV; + + info = devm_kzalloc(&pdev->dev, sizeof(struct sa1100_rtc), GFP_KERNEL); + if (!info) + return -ENOMEM; + info->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(info->clk)) { + dev_err(&pdev->dev, "failed to find rtc clock source\n"); + return PTR_ERR(info->clk); + } + info->irq_1hz = irq_1hz; + info->irq_alarm = irq_alarm; + spin_lock_init(&info->lock); + platform_set_drvdata(pdev, info); + + ret = clk_prepare_enable(info->clk); + if (ret) + return ret; /* * According to the manual we should be able to let RTTR be zero * and then a default diviser for a 32.768KHz clock is used. @@ -364,53 +259,91 @@ static int sa1100_rtc_probe(struct platform_device *pdev) */ if (RTTR == 0) { RTTR = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16); - dev_warn(&pdev->dev, "warning: initializing default clock divider/trim value\n"); + dev_warn(&pdev->dev, "warning: " + "initializing default clock divider/trim value\n"); /* The current RTC value probably doesn't make sense either */ RCNR = 0; } device_init_wakeup(&pdev->dev, 1); - rtc = rtc_device_register(pdev->name, &pdev->dev, &sa1100_rtc_ops, - THIS_MODULE); + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &sa1100_rtc_ops, + THIS_MODULE); - if (IS_ERR(rtc)) - return PTR_ERR(rtc); - - platform_set_drvdata(pdev, rtc); + if (IS_ERR(rtc)) { + ret = PTR_ERR(rtc); + goto err_dev; + } + info->rtc = rtc; + + /* Fix for a nasty initialization problem the in SA11xx RTSR register. + * See also the comments in sa1100_rtc_interrupt(). + * + * Sometimes bit 1 of the RTSR (RTSR_HZ) will wake up 1, which means an + * interrupt pending, even though interrupts were never enabled. + * In this case, this bit it must be reset before enabling + * interruptions to avoid a nonexistent interrupt to occur. + * + * In principle, the same problem would apply to bit 0, although it has + * never been observed to happen. + * + * This issue is addressed both here and in sa1100_rtc_interrupt(). + * If the issue is not addressed here, in the times when the processor + * wakes up with the bit set there will be one spurious interrupt. + * + * The issue is also dealt with in sa1100_rtc_interrupt() to be on the + * safe side, once the condition that lead to this strange + * initialization is unknown and could in principle happen during + * normal processing. + * + * Notice that clearing bit 1 and 0 is accomplished by writting ONES to + * the corresponding bits in RTSR. */ + RTSR = RTSR_AL | RTSR_HZ; return 0; +err_dev: + clk_disable_unprepare(info->clk); + return ret; } static int sa1100_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); + struct sa1100_rtc *info = platform_get_drvdata(pdev); - if (rtc) - rtc_device_unregister(rtc); + if (info) + clk_disable_unprepare(info->clk); return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int sa1100_rtc_suspend(struct device *dev) { + struct sa1100_rtc *info = dev_get_drvdata(dev); if (device_may_wakeup(dev)) - enable_irq_wake(IRQ_RTCAlrm); + enable_irq_wake(info->irq_alarm); return 0; } static int sa1100_rtc_resume(struct device *dev) { + struct sa1100_rtc *info = dev_get_drvdata(dev); if (device_may_wakeup(dev)) - disable_irq_wake(IRQ_RTCAlrm); + disable_irq_wake(info->irq_alarm); return 0; } +#endif -static const struct dev_pm_ops sa1100_rtc_pm_ops = { - .suspend = sa1100_rtc_suspend, - .resume = sa1100_rtc_resume, +static SIMPLE_DEV_PM_OPS(sa1100_rtc_pm_ops, sa1100_rtc_suspend, + sa1100_rtc_resume); + +#ifdef CONFIG_OF +static const struct of_device_id sa1100_rtc_dt_ids[] = { + { .compatible = "mrvl,sa1100-rtc", }, + { .compatible = "mrvl,mmp-rtc", }, + {} }; +MODULE_DEVICE_TABLE(of, sa1100_rtc_dt_ids); #endif static struct platform_driver sa1100_rtc_driver = { @@ -418,24 +351,12 @@ static struct platform_driver sa1100_rtc_driver = { .remove = sa1100_rtc_remove, .driver = { .name = "sa1100-rtc", -#ifdef CONFIG_PM .pm = &sa1100_rtc_pm_ops, -#endif + .of_match_table = of_match_ptr(sa1100_rtc_dt_ids), }, }; -static int __init sa1100_rtc_init(void) -{ - return platform_driver_register(&sa1100_rtc_driver); -} - -static void __exit sa1100_rtc_exit(void) -{ - platform_driver_unregister(&sa1100_rtc_driver); -} - -module_init(sa1100_rtc_init); -module_exit(sa1100_rtc_exit); +module_platform_driver(sa1100_rtc_driver); MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); MODULE_DESCRIPTION("SA11x0/PXA2xx Realtime Clock Driver (RTC)"); diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c index 5efbd5990ff..d0d2b047658 100644 --- a/drivers/rtc/rtc-sh.c +++ b/drivers/rtc/rtc-sh.c @@ -344,29 +344,10 @@ static inline void sh_rtc_setcie(struct device *dev, unsigned int enable) spin_unlock_irq(&rtc->lock); } -static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +static int sh_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { - struct sh_rtc *rtc = dev_get_drvdata(dev); - unsigned int ret = 0; - - switch (cmd) { - case RTC_AIE_OFF: - case RTC_AIE_ON: - sh_rtc_setaie(dev, cmd == RTC_AIE_ON); - break; - case RTC_UIE_OFF: - rtc->periodic_freq &= ~PF_OXS; - sh_rtc_setcie(dev, 0); - break; - case RTC_UIE_ON: - rtc->periodic_freq |= PF_OXS; - sh_rtc_setcie(dev, 1); - break; - default: - ret = -ENOIOCTLCMD; - } - - return ret; + sh_rtc_setaie(dev, enabled); + return 0; } static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) @@ -596,14 +577,12 @@ static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) } static struct rtc_class_ops sh_rtc_ops = { - .ioctl = sh_rtc_ioctl, .read_time = sh_rtc_read_time, .set_time = sh_rtc_set_time, .read_alarm = sh_rtc_read_alarm, .set_alarm = sh_rtc_set_alarm, - .irq_set_state = sh_rtc_irq_set_state, - .irq_set_freq = sh_rtc_irq_set_freq, .proc = sh_rtc_proc, + .alarm_irq_enable = sh_rtc_alarm_irq_enable, }; static int __init sh_rtc_probe(struct platform_device *pdev) @@ -614,7 +593,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev) char clk_name[6]; int clk_id, ret; - rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL); + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); if (unlikely(!rtc)) return -ENOMEM; @@ -623,9 +602,8 @@ static int __init sh_rtc_probe(struct platform_device *pdev) /* get periodic/carry/alarm irqs */ ret = platform_get_irq(pdev, 0); if (unlikely(ret <= 0)) { - ret = -ENOENT; dev_err(&pdev->dev, "No IRQ resource\n"); - goto err_badres; + return -ENOENT; } rtc->periodic_irq = ret; @@ -634,24 +612,21 @@ static int __init sh_rtc_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (unlikely(res == NULL)) { - ret = -ENOENT; dev_err(&pdev->dev, "No IO resource\n"); - goto err_badres; + return -ENOENT; } rtc->regsize = resource_size(res); - rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name); - if (unlikely(!rtc->res)) { - ret = -EBUSY; - goto err_badres; - } + rtc->res = devm_request_mem_region(&pdev->dev, res->start, + rtc->regsize, pdev->name); + if (unlikely(!rtc->res)) + return -EBUSY; - rtc->regbase = ioremap_nocache(rtc->res->start, rtc->regsize); - if (unlikely(!rtc->regbase)) { - ret = -EINVAL; - goto err_badmap; - } + rtc->regbase = devm_ioremap_nocache(&pdev->dev, rtc->res->start, + rtc->regsize); + if (unlikely(!rtc->regbase)) + return -EINVAL; clk_id = pdev->id; /* With a single device, the clock id is still "rtc0" */ @@ -660,7 +635,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev) snprintf(clk_name, sizeof(clk_name), "rtc%d", clk_id); - rtc->clk = clk_get(&pdev->dev, clk_name); + rtc->clk = devm_clk_get(&pdev->dev, clk_name); if (IS_ERR(rtc->clk)) { /* * No error handling for rtc->clk intentionally, not all @@ -674,8 +649,9 @@ static int __init sh_rtc_probe(struct platform_device *pdev) clk_enable(rtc->clk); rtc->capabilities = RTC_DEF_CAPABILITIES; - if (pdev->dev.platform_data) { - struct sh_rtc_platform_info *pinfo = pdev->dev.platform_data; + if (dev_get_platdata(&pdev->dev)) { + struct sh_rtc_platform_info *pinfo = + dev_get_platdata(&pdev->dev); /* * Some CPUs have special capabilities in addition to the @@ -686,8 +662,8 @@ static int __init sh_rtc_probe(struct platform_device *pdev) if (rtc->carry_irq <= 0) { /* register shared periodic/carry/alarm irq */ - ret = request_irq(rtc->periodic_irq, sh_rtc_shared, - IRQF_DISABLED, "sh-rtc", rtc); + ret = devm_request_irq(&pdev->dev, rtc->periodic_irq, + sh_rtc_shared, 0, "sh-rtc", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request IRQ failed with %d, IRQ %d\n", ret, @@ -696,8 +672,8 @@ static int __init sh_rtc_probe(struct platform_device *pdev) } } else { /* register periodic/carry/alarm irqs */ - ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, - IRQF_DISABLED, "sh-rtc period", rtc); + ret = devm_request_irq(&pdev->dev, rtc->periodic_irq, + sh_rtc_periodic, 0, "sh-rtc period", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request period IRQ failed with %d, IRQ %d\n", @@ -705,24 +681,21 @@ static int __init sh_rtc_probe(struct platform_device *pdev) goto err_unmap; } - ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, - IRQF_DISABLED, "sh-rtc carry", rtc); + ret = devm_request_irq(&pdev->dev, rtc->carry_irq, + sh_rtc_interrupt, 0, "sh-rtc carry", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request carry IRQ failed with %d, IRQ %d\n", ret, rtc->carry_irq); - free_irq(rtc->periodic_irq, rtc); goto err_unmap; } - ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, - IRQF_DISABLED, "sh-rtc alarm", rtc); + ret = devm_request_irq(&pdev->dev, rtc->alarm_irq, + sh_rtc_alarm, 0, "sh-rtc alarm", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request alarm IRQ failed with %d, IRQ %d\n", ret, rtc->alarm_irq); - free_irq(rtc->carry_irq, rtc); - free_irq(rtc->periodic_irq, rtc); goto err_unmap; } } @@ -735,13 +708,10 @@ static int __init sh_rtc_probe(struct platform_device *pdev) sh_rtc_setaie(&pdev->dev, 0); sh_rtc_setcie(&pdev->dev, 0); - rtc->rtc_dev = rtc_device_register("sh", &pdev->dev, + rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "sh", &sh_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc_dev)) { ret = PTR_ERR(rtc->rtc_dev); - free_irq(rtc->periodic_irq, rtc); - free_irq(rtc->carry_irq, rtc); - free_irq(rtc->alarm_irq, rtc); goto err_unmap; } @@ -758,12 +728,6 @@ static int __init sh_rtc_probe(struct platform_device *pdev) err_unmap: clk_disable(rtc->clk); - clk_put(rtc->clk); - iounmap(rtc->regbase); -err_badmap: - release_resource(rtc->res); -err_badres: - kfree(rtc); return ret; } @@ -772,28 +736,12 @@ static int __exit sh_rtc_remove(struct platform_device *pdev) { struct sh_rtc *rtc = platform_get_drvdata(pdev); - rtc_device_unregister(rtc->rtc_dev); sh_rtc_irq_set_state(&pdev->dev, 0); sh_rtc_setaie(&pdev->dev, 0); sh_rtc_setcie(&pdev->dev, 0); - free_irq(rtc->periodic_irq, rtc); - - if (rtc->carry_irq > 0) { - free_irq(rtc->carry_irq, rtc); - free_irq(rtc->alarm_irq, rtc); - } - - iounmap(rtc->regbase); - release_resource(rtc->res); - clk_disable(rtc->clk); - clk_put(rtc->clk); - - platform_set_drvdata(pdev, NULL); - - kfree(rtc); return 0; } @@ -803,14 +751,15 @@ static void sh_rtc_set_irq_wake(struct device *dev, int enabled) struct platform_device *pdev = to_platform_device(dev); struct sh_rtc *rtc = platform_get_drvdata(pdev); - set_irq_wake(rtc->periodic_irq, enabled); + irq_set_irq_wake(rtc->periodic_irq, enabled); if (rtc->carry_irq > 0) { - set_irq_wake(rtc->carry_irq, enabled); - set_irq_wake(rtc->alarm_irq, enabled); + irq_set_irq_wake(rtc->carry_irq, enabled); + irq_set_irq_wake(rtc->alarm_irq, enabled); } } +#ifdef CONFIG_PM_SLEEP static int sh_rtc_suspend(struct device *dev) { if (device_may_wakeup(dev)) @@ -826,33 +775,20 @@ static int sh_rtc_resume(struct device *dev) return 0; } +#endif -static const struct dev_pm_ops sh_rtc_dev_pm_ops = { - .suspend = sh_rtc_suspend, - .resume = sh_rtc_resume, -}; +static SIMPLE_DEV_PM_OPS(sh_rtc_pm_ops, sh_rtc_suspend, sh_rtc_resume); static struct platform_driver sh_rtc_platform_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, - .pm = &sh_rtc_dev_pm_ops, + .pm = &sh_rtc_pm_ops, }, .remove = __exit_p(sh_rtc_remove), }; -static int __init sh_rtc_init(void) -{ - return platform_driver_probe(&sh_rtc_platform_driver, sh_rtc_probe); -} - -static void __exit sh_rtc_exit(void) -{ - platform_driver_unregister(&sh_rtc_platform_driver); -} - -module_init(sh_rtc_init); -module_exit(sh_rtc_exit); +module_platform_driver_probe(sh_rtc_platform_driver, sh_rtc_probe); MODULE_DESCRIPTION("SuperH on-chip RTC driver"); MODULE_VERSION(DRV_VERSION); diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c new file mode 100644 index 00000000000..76e38007ba9 --- /dev/null +++ b/drivers/rtc/rtc-sirfsoc.c @@ -0,0 +1,423 @@ +/* + * SiRFSoC Real Time Clock interface for Linux + * + * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include <linux/module.h> +#include <linux/err.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/rtc/sirfsoc_rtciobrg.h> + + +#define RTC_CN 0x00 +#define RTC_ALARM0 0x04 +#define RTC_ALARM1 0x18 +#define RTC_STATUS 0x08 +#define RTC_SW_VALUE 0x40 +#define SIRFSOC_RTC_AL1E (1<<6) +#define SIRFSOC_RTC_AL1 (1<<4) +#define SIRFSOC_RTC_HZE (1<<3) +#define SIRFSOC_RTC_AL0E (1<<2) +#define SIRFSOC_RTC_HZ (1<<1) +#define SIRFSOC_RTC_AL0 (1<<0) +#define RTC_DIV 0x0c +#define RTC_DEEP_CTRL 0x14 +#define RTC_CLOCK_SWITCH 0x1c +#define SIRFSOC_RTC_CLK 0x03 /* others are reserved */ + +/* Refer to RTC DIV switch */ +#define RTC_HZ 16 + +/* This macro is also defined in arch/arm/plat-sirfsoc/cpu.c */ +#define RTC_SHIFT 4 + +#define INTR_SYSRTC_CN 0x48 + +struct sirfsoc_rtc_drv { + struct rtc_device *rtc; + u32 rtc_base; + u32 irq; + unsigned irq_wake; + /* Overflow for every 8 years extra time */ + u32 overflow_rtc; +#ifdef CONFIG_PM + u32 saved_counter; + u32 saved_overflow_rtc; +#endif +}; + +static int sirfsoc_rtc_read_alarm(struct device *dev, + struct rtc_wkalrm *alrm) +{ + unsigned long rtc_alarm, rtc_count; + struct sirfsoc_rtc_drv *rtcdrv; + + rtcdrv = dev_get_drvdata(dev); + + local_irq_disable(); + + rtc_count = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + + rtc_alarm = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_ALARM0); + memset(alrm, 0, sizeof(struct rtc_wkalrm)); + + /* + * assume alarm interval not beyond one round counter overflow_rtc: + * 0->0xffffffff + */ + /* if alarm is in next overflow cycle */ + if (rtc_count > rtc_alarm) + rtc_time_to_tm((rtcdrv->overflow_rtc + 1) + << (BITS_PER_LONG - RTC_SHIFT) + | rtc_alarm >> RTC_SHIFT, &(alrm->time)); + else + rtc_time_to_tm(rtcdrv->overflow_rtc + << (BITS_PER_LONG - RTC_SHIFT) + | rtc_alarm >> RTC_SHIFT, &(alrm->time)); + if (sirfsoc_rtc_iobrg_readl( + rtcdrv->rtc_base + RTC_STATUS) & SIRFSOC_RTC_AL0E) + alrm->enabled = 1; + local_irq_enable(); + + return 0; +} + +static int sirfsoc_rtc_set_alarm(struct device *dev, + struct rtc_wkalrm *alrm) +{ + unsigned long rtc_status_reg, rtc_alarm; + struct sirfsoc_rtc_drv *rtcdrv; + rtcdrv = dev_get_drvdata(dev); + + if (alrm->enabled) { + rtc_tm_to_time(&(alrm->time), &rtc_alarm); + + local_irq_disable(); + + rtc_status_reg = sirfsoc_rtc_iobrg_readl( + rtcdrv->rtc_base + RTC_STATUS); + if (rtc_status_reg & SIRFSOC_RTC_AL0E) { + /* + * An ongoing alarm in progress - ingore it and not + * to return EBUSY + */ + dev_info(dev, "An old alarm was set, will be replaced by a new one\n"); + } + + sirfsoc_rtc_iobrg_writel( + rtc_alarm << RTC_SHIFT, rtcdrv->rtc_base + RTC_ALARM0); + rtc_status_reg &= ~0x07; /* mask out the lower status bits */ + /* + * This bit RTC_AL sets it as a wake-up source for Sleep Mode + * Writing 1 into this bit will clear it + */ + rtc_status_reg |= SIRFSOC_RTC_AL0; + /* enable the RTC alarm interrupt */ + rtc_status_reg |= SIRFSOC_RTC_AL0E; + sirfsoc_rtc_iobrg_writel( + rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS); + local_irq_enable(); + } else { + /* + * if this function was called with enabled=0 + * then it could mean that the application is + * trying to cancel an ongoing alarm + */ + local_irq_disable(); + + rtc_status_reg = sirfsoc_rtc_iobrg_readl( + rtcdrv->rtc_base + RTC_STATUS); + if (rtc_status_reg & SIRFSOC_RTC_AL0E) { + /* clear the RTC status register's alarm bit */ + rtc_status_reg &= ~0x07; + /* write 1 into SIRFSOC_RTC_AL0 to force a clear */ + rtc_status_reg |= (SIRFSOC_RTC_AL0); + /* Clear the Alarm enable bit */ + rtc_status_reg &= ~(SIRFSOC_RTC_AL0E); + + sirfsoc_rtc_iobrg_writel(rtc_status_reg, + rtcdrv->rtc_base + RTC_STATUS); + } + + local_irq_enable(); + } + + return 0; +} + +static int sirfsoc_rtc_read_time(struct device *dev, + struct rtc_time *tm) +{ + unsigned long tmp_rtc = 0; + struct sirfsoc_rtc_drv *rtcdrv; + rtcdrv = dev_get_drvdata(dev); + /* + * This patch is taken from WinCE - Need to validate this for + * correctness. To work around sirfsoc RTC counter double sync logic + * fail, read several times to make sure get stable value. + */ + do { + tmp_rtc = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + cpu_relax(); + } while (tmp_rtc != sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN)); + + rtc_time_to_tm(rtcdrv->overflow_rtc << (BITS_PER_LONG - RTC_SHIFT) | + tmp_rtc >> RTC_SHIFT, tm); + return 0; +} + +static int sirfsoc_rtc_set_time(struct device *dev, + struct rtc_time *tm) +{ + unsigned long rtc_time; + struct sirfsoc_rtc_drv *rtcdrv; + rtcdrv = dev_get_drvdata(dev); + + rtc_tm_to_time(tm, &rtc_time); + + rtcdrv->overflow_rtc = rtc_time >> (BITS_PER_LONG - RTC_SHIFT); + + sirfsoc_rtc_iobrg_writel(rtcdrv->overflow_rtc, + rtcdrv->rtc_base + RTC_SW_VALUE); + sirfsoc_rtc_iobrg_writel( + rtc_time << RTC_SHIFT, rtcdrv->rtc_base + RTC_CN); + + return 0; +} + +static int sirfsoc_rtc_ioctl(struct device *dev, unsigned int cmd, + unsigned long arg) +{ + switch (cmd) { + case RTC_PIE_ON: + case RTC_PIE_OFF: + case RTC_UIE_ON: + case RTC_UIE_OFF: + case RTC_AIE_ON: + case RTC_AIE_OFF: + return 0; + + default: + return -ENOIOCTLCMD; + } +} + +static const struct rtc_class_ops sirfsoc_rtc_ops = { + .read_time = sirfsoc_rtc_read_time, + .set_time = sirfsoc_rtc_set_time, + .read_alarm = sirfsoc_rtc_read_alarm, + .set_alarm = sirfsoc_rtc_set_alarm, + .ioctl = sirfsoc_rtc_ioctl +}; + +static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata) +{ + struct sirfsoc_rtc_drv *rtcdrv = pdata; + unsigned long rtc_status_reg = 0x0; + unsigned long events = 0x0; + + rtc_status_reg = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_STATUS); + /* this bit will be set ONLY if an alarm was active + * and it expired NOW + * So this is being used as an ASSERT + */ + if (rtc_status_reg & SIRFSOC_RTC_AL0) { + /* + * clear the RTC status register's alarm bit + * mask out the lower status bits + */ + rtc_status_reg &= ~0x07; + /* write 1 into SIRFSOC_RTC_AL0 to ACK the alarm interrupt */ + rtc_status_reg |= (SIRFSOC_RTC_AL0); + /* Clear the Alarm enable bit */ + rtc_status_reg &= ~(SIRFSOC_RTC_AL0E); + } + sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS); + /* this should wake up any apps polling/waiting on the read + * after setting the alarm + */ + events |= RTC_IRQF | RTC_AF; + rtc_update_irq(rtcdrv->rtc, 1, events); + + return IRQ_HANDLED; +} + +static const struct of_device_id sirfsoc_rtc_of_match[] = { + { .compatible = "sirf,prima2-sysrtc"}, + {}, +}; +MODULE_DEVICE_TABLE(of, sirfsoc_rtc_of_match); + +static int sirfsoc_rtc_probe(struct platform_device *pdev) +{ + int err; + unsigned long rtc_div; + struct sirfsoc_rtc_drv *rtcdrv; + struct device_node *np = pdev->dev.of_node; + + rtcdrv = devm_kzalloc(&pdev->dev, + sizeof(struct sirfsoc_rtc_drv), GFP_KERNEL); + if (rtcdrv == NULL) + return -ENOMEM; + + err = of_property_read_u32(np, "reg", &rtcdrv->rtc_base); + if (err) { + dev_err(&pdev->dev, "unable to find base address of rtc node in dtb\n"); + return err; + } + + platform_set_drvdata(pdev, rtcdrv); + + /* Register rtc alarm as a wakeup source */ + device_init_wakeup(&pdev->dev, 1); + + /* + * Set SYS_RTC counter in RTC_HZ HZ Units + * We are using 32K RTC crystal (32768 / RTC_HZ / 2) -1 + * If 16HZ, therefore RTC_DIV = 1023; + */ + rtc_div = ((32768 / RTC_HZ) / 2) - 1; + sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV); + + rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &sirfsoc_rtc_ops, THIS_MODULE); + if (IS_ERR(rtcdrv->rtc)) { + err = PTR_ERR(rtcdrv->rtc); + dev_err(&pdev->dev, "can't register RTC device\n"); + return err; + } + + /* 0x3 -> RTC_CLK */ + sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK, + rtcdrv->rtc_base + RTC_CLOCK_SWITCH); + + /* reset SYS RTC ALARM0 */ + sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM0); + + /* reset SYS RTC ALARM1 */ + sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM1); + + /* Restore RTC Overflow From Register After Command Reboot */ + rtcdrv->overflow_rtc = + sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE); + + rtcdrv->irq = platform_get_irq(pdev, 0); + err = devm_request_irq( + &pdev->dev, + rtcdrv->irq, + sirfsoc_rtc_irq_handler, + IRQF_SHARED, + pdev->name, + rtcdrv); + if (err) { + dev_err(&pdev->dev, "Unable to register for the SiRF SOC RTC IRQ\n"); + return err; + } + + return 0; +} + +static int sirfsoc_rtc_remove(struct platform_device *pdev) +{ + device_init_wakeup(&pdev->dev, 0); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int sirfsoc_rtc_suspend(struct device *dev) +{ + struct sirfsoc_rtc_drv *rtcdrv = dev_get_drvdata(dev); + rtcdrv->overflow_rtc = + sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE); + + rtcdrv->saved_counter = + sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + rtcdrv->saved_overflow_rtc = rtcdrv->overflow_rtc; + if (device_may_wakeup(dev) && !enable_irq_wake(rtcdrv->irq)) + rtcdrv->irq_wake = 1; + + return 0; +} + +static int sirfsoc_rtc_resume(struct device *dev) +{ + u32 tmp; + struct sirfsoc_rtc_drv *rtcdrv = dev_get_drvdata(dev); + + /* + * if resume from snapshot and the rtc power is lost, + * restroe the rtc settings + */ + if (SIRFSOC_RTC_CLK != sirfsoc_rtc_iobrg_readl( + rtcdrv->rtc_base + RTC_CLOCK_SWITCH)) { + u32 rtc_div; + /* 0x3 -> RTC_CLK */ + sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK, + rtcdrv->rtc_base + RTC_CLOCK_SWITCH); + /* + * Set SYS_RTC counter in RTC_HZ HZ Units + * We are using 32K RTC crystal (32768 / RTC_HZ / 2) -1 + * If 16HZ, therefore RTC_DIV = 1023; + */ + rtc_div = ((32768 / RTC_HZ) / 2) - 1; + + sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV); + + /* reset SYS RTC ALARM0 */ + sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM0); + + /* reset SYS RTC ALARM1 */ + sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM1); + } + rtcdrv->overflow_rtc = rtcdrv->saved_overflow_rtc; + + /* + * if current counter is small than previous, + * it means overflow in sleep + */ + tmp = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + if (tmp <= rtcdrv->saved_counter) + rtcdrv->overflow_rtc++; + /* + *PWRC Value Be Changed When Suspend, Restore Overflow + * In Memory To Register + */ + sirfsoc_rtc_iobrg_writel(rtcdrv->overflow_rtc, + rtcdrv->rtc_base + RTC_SW_VALUE); + + if (device_may_wakeup(dev) && rtcdrv->irq_wake) { + disable_irq_wake(rtcdrv->irq); + rtcdrv->irq_wake = 0; + } + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(sirfsoc_rtc_pm_ops, + sirfsoc_rtc_suspend, sirfsoc_rtc_resume); + +static struct platform_driver sirfsoc_rtc_driver = { + .driver = { + .name = "sirfsoc-rtc", + .owner = THIS_MODULE, + .pm = &sirfsoc_rtc_pm_ops, + .of_match_table = sirfsoc_rtc_of_match, + }, + .probe = sirfsoc_rtc_probe, + .remove = sirfsoc_rtc_remove, +}; +module_platform_driver(sirfsoc_rtc_driver); + +MODULE_DESCRIPTION("SiRF SoC rtc driver"); +MODULE_AUTHOR("Xianglong Du <Xianglong.Du@csr.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:sirfsoc-rtc"); diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c new file mode 100644 index 00000000000..fa384fe2898 --- /dev/null +++ b/drivers/rtc/rtc-snvs.c @@ -0,0 +1,340 @@ +/* + * Copyright (C) 2011-2012 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> + +/* These register offsets are relative to LP (Low Power) range */ +#define SNVS_LPCR 0x04 +#define SNVS_LPSR 0x18 +#define SNVS_LPSRTCMR 0x1c +#define SNVS_LPSRTCLR 0x20 +#define SNVS_LPTAR 0x24 +#define SNVS_LPPGDR 0x30 + +#define SNVS_LPCR_SRTC_ENV (1 << 0) +#define SNVS_LPCR_LPTA_EN (1 << 1) +#define SNVS_LPCR_LPWUI_EN (1 << 3) +#define SNVS_LPSR_LPTA (1 << 0) + +#define SNVS_LPPGDR_INIT 0x41736166 +#define CNTR_TO_SECS_SH 15 + +struct snvs_rtc_data { + struct rtc_device *rtc; + void __iomem *ioaddr; + int irq; + spinlock_t lock; +}; + +static u32 rtc_read_lp_counter(void __iomem *ioaddr) +{ + u64 read1, read2; + + do { + read1 = readl(ioaddr + SNVS_LPSRTCMR); + read1 <<= 32; + read1 |= readl(ioaddr + SNVS_LPSRTCLR); + + read2 = readl(ioaddr + SNVS_LPSRTCMR); + read2 <<= 32; + read2 |= readl(ioaddr + SNVS_LPSRTCLR); + } while (read1 != read2); + + /* Convert 47-bit counter to 32-bit raw second count */ + return (u32) (read1 >> CNTR_TO_SECS_SH); +} + +static void rtc_write_sync_lp(void __iomem *ioaddr) +{ + u32 count1, count2, count3; + int i; + + /* Wait for 3 CKIL cycles */ + for (i = 0; i < 3; i++) { + do { + count1 = readl(ioaddr + SNVS_LPSRTCLR); + count2 = readl(ioaddr + SNVS_LPSRTCLR); + } while (count1 != count2); + + /* Now wait until counter value changes */ + do { + do { + count2 = readl(ioaddr + SNVS_LPSRTCLR); + count3 = readl(ioaddr + SNVS_LPSRTCLR); + } while (count2 != count3); + } while (count3 == count1); + } +} + +static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable) +{ + unsigned long flags; + int timeout = 1000; + u32 lpcr; + + spin_lock_irqsave(&data->lock, flags); + + lpcr = readl(data->ioaddr + SNVS_LPCR); + if (enable) + lpcr |= SNVS_LPCR_SRTC_ENV; + else + lpcr &= ~SNVS_LPCR_SRTC_ENV; + writel(lpcr, data->ioaddr + SNVS_LPCR); + + spin_unlock_irqrestore(&data->lock, flags); + + while (--timeout) { + lpcr = readl(data->ioaddr + SNVS_LPCR); + + if (enable) { + if (lpcr & SNVS_LPCR_SRTC_ENV) + break; + } else { + if (!(lpcr & SNVS_LPCR_SRTC_ENV)) + break; + } + } + + if (!timeout) + return -ETIMEDOUT; + + return 0; +} + +static int snvs_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + unsigned long time = rtc_read_lp_counter(data->ioaddr); + + rtc_time_to_tm(time, tm); + + return 0; +} + +static int snvs_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + unsigned long time; + + rtc_tm_to_time(tm, &time); + + /* Disable RTC first */ + snvs_rtc_enable(data, false); + + /* Write 32-bit time to 47-bit timer, leaving 15 LSBs blank */ + writel(time << CNTR_TO_SECS_SH, data->ioaddr + SNVS_LPSRTCLR); + writel(time >> (32 - CNTR_TO_SECS_SH), data->ioaddr + SNVS_LPSRTCMR); + + /* Enable RTC again */ + snvs_rtc_enable(data, true); + + return 0; +} + +static int snvs_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + u32 lptar, lpsr; + + lptar = readl(data->ioaddr + SNVS_LPTAR); + rtc_time_to_tm(lptar, &alrm->time); + + lpsr = readl(data->ioaddr + SNVS_LPSR); + alrm->pending = (lpsr & SNVS_LPSR_LPTA) ? 1 : 0; + + return 0; +} + +static int snvs_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + u32 lpcr; + unsigned long flags; + + spin_lock_irqsave(&data->lock, flags); + + lpcr = readl(data->ioaddr + SNVS_LPCR); + if (enable) + lpcr |= (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN); + else + lpcr &= ~(SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN); + writel(lpcr, data->ioaddr + SNVS_LPCR); + + spin_unlock_irqrestore(&data->lock, flags); + + rtc_write_sync_lp(data->ioaddr); + + return 0; +} + +static int snvs_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + struct rtc_time *alrm_tm = &alrm->time; + unsigned long time; + unsigned long flags; + u32 lpcr; + + rtc_tm_to_time(alrm_tm, &time); + + spin_lock_irqsave(&data->lock, flags); + + /* Have to clear LPTA_EN before programming new alarm time in LPTAR */ + lpcr = readl(data->ioaddr + SNVS_LPCR); + lpcr &= ~SNVS_LPCR_LPTA_EN; + writel(lpcr, data->ioaddr + SNVS_LPCR); + + spin_unlock_irqrestore(&data->lock, flags); + + writel(time, data->ioaddr + SNVS_LPTAR); + + /* Clear alarm interrupt status bit */ + writel(SNVS_LPSR_LPTA, data->ioaddr + SNVS_LPSR); + + return snvs_rtc_alarm_irq_enable(dev, alrm->enabled); +} + +static const struct rtc_class_ops snvs_rtc_ops = { + .read_time = snvs_rtc_read_time, + .set_time = snvs_rtc_set_time, + .read_alarm = snvs_rtc_read_alarm, + .set_alarm = snvs_rtc_set_alarm, + .alarm_irq_enable = snvs_rtc_alarm_irq_enable, +}; + +static irqreturn_t snvs_rtc_irq_handler(int irq, void *dev_id) +{ + struct device *dev = dev_id; + struct snvs_rtc_data *data = dev_get_drvdata(dev); + u32 lpsr; + u32 events = 0; + + lpsr = readl(data->ioaddr + SNVS_LPSR); + + if (lpsr & SNVS_LPSR_LPTA) { + events |= (RTC_AF | RTC_IRQF); + + /* RTC alarm should be one-shot */ + snvs_rtc_alarm_irq_enable(dev, 0); + + rtc_update_irq(data->rtc, 1, events); + } + + /* clear interrupt status */ + writel(lpsr, data->ioaddr + SNVS_LPSR); + + return events ? IRQ_HANDLED : IRQ_NONE; +} + +static int snvs_rtc_probe(struct platform_device *pdev) +{ + struct snvs_rtc_data *data; + struct resource *res; + int ret; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(data->ioaddr)) + return PTR_ERR(data->ioaddr); + + data->irq = platform_get_irq(pdev, 0); + if (data->irq < 0) + return data->irq; + + platform_set_drvdata(pdev, data); + + spin_lock_init(&data->lock); + + /* Initialize glitch detect */ + writel(SNVS_LPPGDR_INIT, data->ioaddr + SNVS_LPPGDR); + + /* Clear interrupt status */ + writel(0xffffffff, data->ioaddr + SNVS_LPSR); + + /* Enable RTC */ + snvs_rtc_enable(data, true); + + device_init_wakeup(&pdev->dev, true); + + ret = devm_request_irq(&pdev->dev, data->irq, snvs_rtc_irq_handler, + IRQF_SHARED, "rtc alarm", &pdev->dev); + if (ret) { + dev_err(&pdev->dev, "failed to request irq %d: %d\n", + data->irq, ret); + return ret; + } + + data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &snvs_rtc_ops, THIS_MODULE); + if (IS_ERR(data->rtc)) { + ret = PTR_ERR(data->rtc); + dev_err(&pdev->dev, "failed to register rtc: %d\n", ret); + return ret; + } + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int snvs_rtc_suspend(struct device *dev) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(data->irq); + + return 0; +} + +static int snvs_rtc_resume(struct device *dev) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(data->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(snvs_rtc_pm_ops, snvs_rtc_suspend, snvs_rtc_resume); + +static const struct of_device_id snvs_dt_ids[] = { + { .compatible = "fsl,sec-v4.0-mon-rtc-lp", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, snvs_dt_ids); + +static struct platform_driver snvs_rtc_driver = { + .driver = { + .name = "snvs_rtc", + .owner = THIS_MODULE, + .pm = &snvs_rtc_pm_ops, + .of_match_table = snvs_dt_ids, + }, + .probe = snvs_rtc_probe, +}; +module_platform_driver(snvs_rtc_driver); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("Freescale SNVS RTC Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c new file mode 100644 index 00000000000..d2cdb9823a1 --- /dev/null +++ b/drivers/rtc/rtc-spear.c @@ -0,0 +1,509 @@ +/* + * drivers/rtc/rtc-spear.c + * + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar<rajeev-dlh.kumar@st.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/bcd.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +/* RTC registers */ +#define TIME_REG 0x00 +#define DATE_REG 0x04 +#define ALARM_TIME_REG 0x08 +#define ALARM_DATE_REG 0x0C +#define CTRL_REG 0x10 +#define STATUS_REG 0x14 + +/* TIME_REG & ALARM_TIME_REG */ +#define SECONDS_UNITS (0xf<<0) /* seconds units position */ +#define SECONDS_TENS (0x7<<4) /* seconds tens position */ +#define MINUTES_UNITS (0xf<<8) /* minutes units position */ +#define MINUTES_TENS (0x7<<12) /* minutes tens position */ +#define HOURS_UNITS (0xf<<16) /* hours units position */ +#define HOURS_TENS (0x3<<20) /* hours tens position */ + +/* DATE_REG & ALARM_DATE_REG */ +#define DAYS_UNITS (0xf<<0) /* days units position */ +#define DAYS_TENS (0x3<<4) /* days tens position */ +#define MONTHS_UNITS (0xf<<8) /* months units position */ +#define MONTHS_TENS (0x1<<12) /* months tens position */ +#define YEARS_UNITS (0xf<<16) /* years units position */ +#define YEARS_TENS (0xf<<20) /* years tens position */ +#define YEARS_HUNDREDS (0xf<<24) /* years hundereds position */ +#define YEARS_MILLENIUMS (0xf<<28) /* years millenium position */ + +/* MASK SHIFT TIME_REG & ALARM_TIME_REG*/ +#define SECOND_SHIFT 0x00 /* seconds units */ +#define MINUTE_SHIFT 0x08 /* minutes units position */ +#define HOUR_SHIFT 0x10 /* hours units position */ +#define MDAY_SHIFT 0x00 /* Month day shift */ +#define MONTH_SHIFT 0x08 /* Month shift */ +#define YEAR_SHIFT 0x10 /* Year shift */ + +#define SECOND_MASK 0x7F +#define MIN_MASK 0x7F +#define HOUR_MASK 0x3F +#define DAY_MASK 0x3F +#define MONTH_MASK 0x7F +#define YEAR_MASK 0xFFFF + +/* date reg equal to time reg, for debug only */ +#define TIME_BYP (1<<9) +#define INT_ENABLE (1<<31) /* interrupt enable */ + +/* STATUS_REG */ +#define CLK_UNCONNECTED (1<<0) +#define PEND_WR_TIME (1<<2) +#define PEND_WR_DATE (1<<3) +#define LOST_WR_TIME (1<<4) +#define LOST_WR_DATE (1<<5) +#define RTC_INT_MASK (1<<31) +#define STATUS_BUSY (PEND_WR_TIME | PEND_WR_DATE) +#define STATUS_FAIL (LOST_WR_TIME | LOST_WR_DATE) + +struct spear_rtc_config { + struct rtc_device *rtc; + struct clk *clk; + spinlock_t lock; + void __iomem *ioaddr; + unsigned int irq_wake; +}; + +static inline void spear_rtc_clear_interrupt(struct spear_rtc_config *config) +{ + unsigned int val; + unsigned long flags; + + spin_lock_irqsave(&config->lock, flags); + val = readl(config->ioaddr + STATUS_REG); + val |= RTC_INT_MASK; + writel(val, config->ioaddr + STATUS_REG); + spin_unlock_irqrestore(&config->lock, flags); +} + +static inline void spear_rtc_enable_interrupt(struct spear_rtc_config *config) +{ + unsigned int val; + + val = readl(config->ioaddr + CTRL_REG); + if (!(val & INT_ENABLE)) { + spear_rtc_clear_interrupt(config); + val |= INT_ENABLE; + writel(val, config->ioaddr + CTRL_REG); + } +} + +static inline void spear_rtc_disable_interrupt(struct spear_rtc_config *config) +{ + unsigned int val; + + val = readl(config->ioaddr + CTRL_REG); + if (val & INT_ENABLE) { + val &= ~INT_ENABLE; + writel(val, config->ioaddr + CTRL_REG); + } +} + +static inline int is_write_complete(struct spear_rtc_config *config) +{ + int ret = 0; + unsigned long flags; + + spin_lock_irqsave(&config->lock, flags); + if ((readl(config->ioaddr + STATUS_REG)) & STATUS_FAIL) + ret = -EIO; + spin_unlock_irqrestore(&config->lock, flags); + + return ret; +} + +static void rtc_wait_not_busy(struct spear_rtc_config *config) +{ + int status, count = 0; + unsigned long flags; + + /* Assuming BUSY may stay active for 80 msec) */ + for (count = 0; count < 80; count++) { + spin_lock_irqsave(&config->lock, flags); + status = readl(config->ioaddr + STATUS_REG); + spin_unlock_irqrestore(&config->lock, flags); + if ((status & STATUS_BUSY) == 0) + break; + /* check status busy, after each msec */ + msleep(1); + } +} + +static irqreturn_t spear_rtc_irq(int irq, void *dev_id) +{ + struct spear_rtc_config *config = dev_id; + unsigned long flags, events = 0; + unsigned int irq_data; + + spin_lock_irqsave(&config->lock, flags); + irq_data = readl(config->ioaddr + STATUS_REG); + spin_unlock_irqrestore(&config->lock, flags); + + if ((irq_data & RTC_INT_MASK)) { + spear_rtc_clear_interrupt(config); + events = RTC_IRQF | RTC_AF; + rtc_update_irq(config->rtc, 1, events); + return IRQ_HANDLED; + } else + return IRQ_NONE; + +} + +static int tm2bcd(struct rtc_time *tm) +{ + if (rtc_valid_tm(tm) != 0) + return -EINVAL; + tm->tm_sec = bin2bcd(tm->tm_sec); + tm->tm_min = bin2bcd(tm->tm_min); + tm->tm_hour = bin2bcd(tm->tm_hour); + tm->tm_mday = bin2bcd(tm->tm_mday); + tm->tm_mon = bin2bcd(tm->tm_mon + 1); + tm->tm_year = bin2bcd(tm->tm_year); + + return 0; +} + +static void bcd2tm(struct rtc_time *tm) +{ + tm->tm_sec = bcd2bin(tm->tm_sec); + tm->tm_min = bcd2bin(tm->tm_min); + tm->tm_hour = bcd2bin(tm->tm_hour); + tm->tm_mday = bcd2bin(tm->tm_mday); + tm->tm_mon = bcd2bin(tm->tm_mon) - 1; + /* epoch == 1900 */ + tm->tm_year = bcd2bin(tm->tm_year); +} + +/* + * spear_rtc_read_time - set the time + * @dev: rtc device in use + * @tm: holds date and time + * + * This function read time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct spear_rtc_config *config = dev_get_drvdata(dev); + unsigned int time, date; + + /* we don't report wday/yday/isdst ... */ + rtc_wait_not_busy(config); + + time = readl(config->ioaddr + TIME_REG); + date = readl(config->ioaddr + DATE_REG); + tm->tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; + tm->tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; + tm->tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; + tm->tm_mday = (date >> MDAY_SHIFT) & DAY_MASK; + tm->tm_mon = (date >> MONTH_SHIFT) & MONTH_MASK; + tm->tm_year = (date >> YEAR_SHIFT) & YEAR_MASK; + + bcd2tm(tm); + return 0; +} + +/* + * spear_rtc_set_time - set the time + * @dev: rtc device in use + * @tm: holds date and time + * + * This function set time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct spear_rtc_config *config = dev_get_drvdata(dev); + unsigned int time, date; + + if (tm2bcd(tm) < 0) + return -EINVAL; + + rtc_wait_not_busy(config); + time = (tm->tm_sec << SECOND_SHIFT) | (tm->tm_min << MINUTE_SHIFT) | + (tm->tm_hour << HOUR_SHIFT); + date = (tm->tm_mday << MDAY_SHIFT) | (tm->tm_mon << MONTH_SHIFT) | + (tm->tm_year << YEAR_SHIFT); + writel(time, config->ioaddr + TIME_REG); + writel(date, config->ioaddr + DATE_REG); + + return is_write_complete(config); +} + +/* + * spear_rtc_read_alarm - read the alarm time + * @dev: rtc device in use + * @alm: holds alarm date and time + * + * This function read alarm time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct spear_rtc_config *config = dev_get_drvdata(dev); + unsigned int time, date; + + rtc_wait_not_busy(config); + + time = readl(config->ioaddr + ALARM_TIME_REG); + date = readl(config->ioaddr + ALARM_DATE_REG); + alm->time.tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; + alm->time.tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; + alm->time.tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; + alm->time.tm_mday = (date >> MDAY_SHIFT) & DAY_MASK; + alm->time.tm_mon = (date >> MONTH_SHIFT) & MONTH_MASK; + alm->time.tm_year = (date >> YEAR_SHIFT) & YEAR_MASK; + + bcd2tm(&alm->time); + alm->enabled = readl(config->ioaddr + CTRL_REG) & INT_ENABLE; + + return 0; +} + +/* + * spear_rtc_set_alarm - set the alarm time + * @dev: rtc device in use + * @alm: holds alarm date and time + * + * This function set alarm time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct spear_rtc_config *config = dev_get_drvdata(dev); + unsigned int time, date; + int err; + + if (tm2bcd(&alm->time) < 0) + return -EINVAL; + + rtc_wait_not_busy(config); + + time = (alm->time.tm_sec << SECOND_SHIFT) | (alm->time.tm_min << + MINUTE_SHIFT) | (alm->time.tm_hour << HOUR_SHIFT); + date = (alm->time.tm_mday << MDAY_SHIFT) | (alm->time.tm_mon << + MONTH_SHIFT) | (alm->time.tm_year << YEAR_SHIFT); + + writel(time, config->ioaddr + ALARM_TIME_REG); + writel(date, config->ioaddr + ALARM_DATE_REG); + err = is_write_complete(config); + if (err < 0) + return err; + + if (alm->enabled) + spear_rtc_enable_interrupt(config); + else + spear_rtc_disable_interrupt(config); + + return 0; +} + +static int spear_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct spear_rtc_config *config = dev_get_drvdata(dev); + int ret = 0; + + spear_rtc_clear_interrupt(config); + + switch (enabled) { + case 0: + /* alarm off */ + spear_rtc_disable_interrupt(config); + break; + case 1: + /* alarm on */ + spear_rtc_enable_interrupt(config); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static struct rtc_class_ops spear_rtc_ops = { + .read_time = spear_rtc_read_time, + .set_time = spear_rtc_set_time, + .read_alarm = spear_rtc_read_alarm, + .set_alarm = spear_rtc_set_alarm, + .alarm_irq_enable = spear_alarm_irq_enable, +}; + +static int spear_rtc_probe(struct platform_device *pdev) +{ + struct resource *res; + struct spear_rtc_config *config; + int status = 0; + int irq; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no resource defined\n"); + return -EBUSY; + } + + config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); + if (!config) + return -ENOMEM; + + /* alarm irqs */ + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no update irq?\n"); + return irq; + } + + status = devm_request_irq(&pdev->dev, irq, spear_rtc_irq, 0, pdev->name, + config); + if (status) { + dev_err(&pdev->dev, "Alarm interrupt IRQ%d already claimed\n", + irq); + return status; + } + + config->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(config->ioaddr)) + return PTR_ERR(config->ioaddr); + + config->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(config->clk)) + return PTR_ERR(config->clk); + + status = clk_prepare_enable(config->clk); + if (status < 0) + return status; + + spin_lock_init(&config->lock); + platform_set_drvdata(pdev, config); + + config->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &spear_rtc_ops, THIS_MODULE); + if (IS_ERR(config->rtc)) { + dev_err(&pdev->dev, "can't register RTC device, err %ld\n", + PTR_ERR(config->rtc)); + status = PTR_ERR(config->rtc); + goto err_disable_clock; + } + + config->rtc->uie_unsupported = 1; + + if (!device_can_wakeup(&pdev->dev)) + device_init_wakeup(&pdev->dev, 1); + + return 0; + +err_disable_clock: + clk_disable_unprepare(config->clk); + + return status; +} + +static int spear_rtc_remove(struct platform_device *pdev) +{ + struct spear_rtc_config *config = platform_get_drvdata(pdev); + + spear_rtc_disable_interrupt(config); + clk_disable_unprepare(config->clk); + device_init_wakeup(&pdev->dev, 0); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int spear_rtc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct spear_rtc_config *config = platform_get_drvdata(pdev); + int irq; + + irq = platform_get_irq(pdev, 0); + if (device_may_wakeup(&pdev->dev)) { + if (!enable_irq_wake(irq)) + config->irq_wake = 1; + } else { + spear_rtc_disable_interrupt(config); + clk_disable(config->clk); + } + + return 0; +} + +static int spear_rtc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct spear_rtc_config *config = platform_get_drvdata(pdev); + int irq; + + irq = platform_get_irq(pdev, 0); + + if (device_may_wakeup(&pdev->dev)) { + if (config->irq_wake) { + disable_irq_wake(irq); + config->irq_wake = 0; + } + } else { + clk_enable(config->clk); + spear_rtc_enable_interrupt(config); + } + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(spear_rtc_pm_ops, spear_rtc_suspend, spear_rtc_resume); + +static void spear_rtc_shutdown(struct platform_device *pdev) +{ + struct spear_rtc_config *config = platform_get_drvdata(pdev); + + spear_rtc_disable_interrupt(config); + clk_disable(config->clk); +} + +#ifdef CONFIG_OF +static const struct of_device_id spear_rtc_id_table[] = { + { .compatible = "st,spear600-rtc" }, + {} +}; +MODULE_DEVICE_TABLE(of, spear_rtc_id_table); +#endif + +static struct platform_driver spear_rtc_driver = { + .probe = spear_rtc_probe, + .remove = spear_rtc_remove, + .shutdown = spear_rtc_shutdown, + .driver = { + .name = "rtc-spear", + .pm = &spear_rtc_pm_ops, + .of_match_table = of_match_ptr(spear_rtc_id_table), + }, +}; + +module_platform_driver(spear_rtc_driver); + +MODULE_ALIAS("platform:rtc-spear"); +MODULE_AUTHOR("Rajeev Kumar <rajeev-dlh.kumar@st.com>"); +MODULE_DESCRIPTION("ST SPEAr Realtime Clock Driver (RTC)"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-starfire.c b/drivers/rtc/rtc-starfire.c index 5be98bfd7ed..f7d8a6db807 100644 --- a/drivers/rtc/rtc-starfire.c +++ b/drivers/rtc/rtc-starfire.c @@ -39,8 +39,10 @@ static const struct rtc_class_ops starfire_rtc_ops = { static int __init starfire_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc = rtc_device_register("starfire", &pdev->dev, - &starfire_rtc_ops, THIS_MODULE); + struct rtc_device *rtc; + + rtc = devm_rtc_device_register(&pdev->dev, "starfire", + &starfire_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -49,32 +51,11 @@ static int __init starfire_rtc_probe(struct platform_device *pdev) return 0; } -static int __exit starfire_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc = platform_get_drvdata(pdev); - - rtc_device_unregister(rtc); - - return 0; -} - static struct platform_driver starfire_rtc_driver = { .driver = { .name = "rtc-starfire", .owner = THIS_MODULE, }, - .remove = __exit_p(starfire_rtc_remove), }; -static int __init starfire_rtc_init(void) -{ - return platform_driver_probe(&starfire_rtc_driver, starfire_rtc_probe); -} - -static void __exit starfire_rtc_exit(void) -{ - platform_driver_unregister(&starfire_rtc_driver); -} - -module_init(starfire_rtc_init); -module_exit(starfire_rtc_exit); +module_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe); diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c index 3b943673cd3..35ed49ea1f8 100644 --- a/drivers/rtc/rtc-stk17ta8.c +++ b/drivers/rtc/rtc-stk17ta8.c @@ -21,6 +21,7 @@ #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/module.h> #define DRV_VERSION "0.1" @@ -213,8 +214,7 @@ static irqreturn_t stk17ta8_rtc_interrupt(int irq, void *dev_id) events |= RTC_UF; else events |= RTC_AF; - if (likely(pdata->rtc)) - rtc_update_irq(pdata->rtc, 1, events); + rtc_update_irq(pdata->rtc, 1, events); } spin_unlock(&pdata->lock); return events ? IRQ_HANDLED : IRQ_NONE; @@ -284,7 +284,7 @@ static struct bin_attribute stk17ta8_nvram_attr = { .write = stk17ta8_nvram_write, }; -static int __devinit stk17ta8_rtc_probe(struct platform_device *pdev) +static int stk17ta8_rtc_probe(struct platform_device *pdev) { struct resource *res; unsigned int cal; @@ -293,19 +293,14 @@ static int __devinit stk17ta8_rtc_probe(struct platform_device *pdev) void __iomem *ioaddr; int ret = 0; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - if (!devm_request_mem_region(&pdev->dev, res->start, RTC_REG_SIZE, - pdev->name)) - return -EBUSY; - ioaddr = devm_ioremap(&pdev->dev, res->start, RTC_REG_SIZE); - if (!ioaddr) - return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ioaddr)) + return PTR_ERR(ioaddr); pdata->ioaddr = ioaddr; pdata->irq = platform_get_irq(pdev, 0); @@ -328,30 +323,28 @@ static int __devinit stk17ta8_rtc_probe(struct platform_device *pdev) writeb(0, ioaddr + RTC_INTERRUPTS); if (devm_request_irq(&pdev->dev, pdata->irq, stk17ta8_rtc_interrupt, - IRQF_DISABLED | IRQF_SHARED, + IRQF_SHARED, pdev->name, pdev) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = 0; } } - pdata->rtc = rtc_device_register(pdev->name, &pdev->dev, + pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &stk17ta8_rtc_ops, THIS_MODULE); if (IS_ERR(pdata->rtc)) return PTR_ERR(pdata->rtc); ret = sysfs_create_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr); - if (ret) - rtc_device_unregister(pdata->rtc); + return ret; } -static int __devexit stk17ta8_rtc_remove(struct platform_device *pdev) +static int stk17ta8_rtc_remove(struct platform_device *pdev) { struct rtc_plat_data *pdata = platform_get_drvdata(pdev); sysfs_remove_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr); - rtc_device_unregister(pdata->rtc); if (pdata->irq > 0) writeb(0, pdata->ioaddr + RTC_INTERRUPTS); return 0; @@ -362,25 +355,14 @@ MODULE_ALIAS("platform:stk17ta8"); static struct platform_driver stk17ta8_rtc_driver = { .probe = stk17ta8_rtc_probe, - .remove = __devexit_p(stk17ta8_rtc_remove), + .remove = stk17ta8_rtc_remove, .driver = { .name = "stk17ta8", .owner = THIS_MODULE, }, }; -static __init int stk17ta8_init(void) -{ - return platform_driver_register(&stk17ta8_rtc_driver); -} - -static __exit void stk17ta8_exit(void) -{ - platform_driver_unregister(&stk17ta8_rtc_driver); -} - -module_init(stk17ta8_init); -module_exit(stk17ta8_exit); +module_platform_driver(stk17ta8_rtc_driver); MODULE_AUTHOR("Thomas Hommel <thomas.hommel@ge.com>"); MODULE_DESCRIPTION("Simtek STK17TA8 RTC driver"); diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c index 7e7d0c806f2..ea96492357b 100644 --- a/drivers/rtc/rtc-stmp3xxx.c +++ b/drivers/rtc/rtc-stmp3xxx.c @@ -6,6 +6,7 @@ * * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. + * Copyright 2011 Wolfram Sang, Pengutronix e.K. */ /* @@ -18,42 +19,141 @@ */ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/io.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/interrupt.h> +#include <linux/delay.h> #include <linux/rtc.h> #include <linux/slab.h> +#include <linux/of_device.h> +#include <linux/of.h> +#include <linux/stmp_device.h> +#include <linux/stmp3xxx_rtc_wdt.h> -#include <mach/platform.h> -#include <mach/stmp3xxx.h> -#include <mach/regs-rtc.h> +#define STMP3XXX_RTC_CTRL 0x0 +#define STMP3XXX_RTC_CTRL_SET 0x4 +#define STMP3XXX_RTC_CTRL_CLR 0x8 +#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001 +#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002 +#define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004 +#define STMP3XXX_RTC_CTRL_WATCHDOGEN 0x00000010 + +#define STMP3XXX_RTC_STAT 0x10 +#define STMP3XXX_RTC_STAT_STALE_SHIFT 16 +#define STMP3XXX_RTC_STAT_RTC_PRESENT 0x80000000 + +#define STMP3XXX_RTC_SECONDS 0x30 + +#define STMP3XXX_RTC_ALARM 0x40 + +#define STMP3XXX_RTC_WATCHDOG 0x50 + +#define STMP3XXX_RTC_PERSISTENT0 0x60 +#define STMP3XXX_RTC_PERSISTENT0_SET 0x64 +#define STMP3XXX_RTC_PERSISTENT0_CLR 0x68 +#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN 0x00000002 +#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN 0x00000004 +#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE 0x00000080 + +#define STMP3XXX_RTC_PERSISTENT1 0x70 +/* missing bitmask in headers */ +#define STMP3XXX_RTC_PERSISTENT1_FORCE_UPDATER 0x80000000 struct stmp3xxx_rtc_data { struct rtc_device *rtc; - unsigned irq_count; void __iomem *io; - int irq_alarm, irq_1msec; + int irq_alarm; }; -static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data) +#if IS_ENABLED(CONFIG_STMP3XXX_RTC_WATCHDOG) +/** + * stmp3xxx_wdt_set_timeout - configure the watchdog inside the STMP3xxx RTC + * @dev: the parent device of the watchdog (= the RTC) + * @timeout: the desired value for the timeout register of the watchdog. + * 0 disables the watchdog + * + * The watchdog needs one register and two bits which are in the RTC domain. + * To handle the resource conflict, the RTC driver will create another + * platform_device for the watchdog driver as a child of the RTC device. + * The watchdog driver is passed the below accessor function via platform_data + * to configure the watchdog. Locking is not needed because accessing SET/CLR + * registers is atomic. + */ + +static void stmp3xxx_wdt_set_timeout(struct device *dev, u32 timeout) { + struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); + + if (timeout) { + writel(timeout, rtc_data->io + STMP3XXX_RTC_WATCHDOG); + writel(STMP3XXX_RTC_CTRL_WATCHDOGEN, + rtc_data->io + STMP3XXX_RTC_CTRL + STMP_OFFSET_REG_SET); + writel(STMP3XXX_RTC_PERSISTENT1_FORCE_UPDATER, + rtc_data->io + STMP3XXX_RTC_PERSISTENT1 + STMP_OFFSET_REG_SET); + } else { + writel(STMP3XXX_RTC_CTRL_WATCHDOGEN, + rtc_data->io + STMP3XXX_RTC_CTRL + STMP_OFFSET_REG_CLR); + writel(STMP3XXX_RTC_PERSISTENT1_FORCE_UPDATER, + rtc_data->io + STMP3XXX_RTC_PERSISTENT1 + STMP_OFFSET_REG_CLR); + } +} + +static struct stmp3xxx_wdt_pdata wdt_pdata = { + .wdt_set_timeout = stmp3xxx_wdt_set_timeout, +}; + +static void stmp3xxx_wdt_register(struct platform_device *rtc_pdev) +{ + struct platform_device *wdt_pdev = + platform_device_alloc("stmp3xxx_rtc_wdt", rtc_pdev->id); + + if (wdt_pdev) { + wdt_pdev->dev.parent = &rtc_pdev->dev; + wdt_pdev->dev.platform_data = &wdt_pdata; + platform_device_add(wdt_pdev); + } +} +#else +static void stmp3xxx_wdt_register(struct platform_device *rtc_pdev) +{ +} +#endif /* CONFIG_STMP3XXX_RTC_WATCHDOG */ + +static int stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data) +{ + int timeout = 5000; /* 3ms according to i.MX28 Ref Manual */ /* - * The datasheet doesn't say which way round the - * NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0, - * 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS + * The i.MX28 Applications Processor Reference Manual, Rev. 1, 2010 + * states: + * | The order in which registers are updated is + * | Persistent 0, 1, 2, 3, 4, 5, Alarm, Seconds. + * | (This list is in bitfield order, from LSB to MSB, as they would + * | appear in the STALE_REGS and NEW_REGS bitfields of the HW_RTC_STAT + * | register. For example, the Seconds register corresponds to + * | STALE_REGS or NEW_REGS containing 0x80.) */ - while (__raw_readl(rtc_data->io + HW_RTC_STAT) & - BF(0x80, RTC_STAT_STALE_REGS)) - cpu_relax(); + do { + if (!(readl(rtc_data->io + STMP3XXX_RTC_STAT) & + (0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))) + return 0; + udelay(1); + } while (--timeout > 0); + return (readl(rtc_data->io + STMP3XXX_RTC_STAT) & + (0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT)) ? -ETIME : 0; } /* Time read/write */ static int stmp3xxx_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) { + int ret; struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); - stmp3xxx_wait_time(rtc_data); - rtc_time_to_tm(__raw_readl(rtc_data->io + HW_RTC_SECONDS), rtc_tm); + ret = stmp3xxx_wait_time(rtc_data); + if (ret) + return ret; + + rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm); return 0; } @@ -61,78 +161,51 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t) { struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); - __raw_writel(t, rtc_data->io + HW_RTC_SECONDS); - stmp3xxx_wait_time(rtc_data); - return 0; + writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS); + return stmp3xxx_wait_time(rtc_data); } /* interrupt(s) handler */ static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id) { struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id); - u32 status; - u32 events = 0; - - status = __raw_readl(rtc_data->io + HW_RTC_CTRL) & - (BM_RTC_CTRL_ALARM_IRQ | BM_RTC_CTRL_ONEMSEC_IRQ); + u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL); - if (status & BM_RTC_CTRL_ALARM_IRQ) { - stmp3xxx_clearl(BM_RTC_CTRL_ALARM_IRQ, - rtc_data->io + HW_RTC_CTRL); - events |= RTC_AF | RTC_IRQF; + if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) { + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ, + rtc_data->io + STMP3XXX_RTC_CTRL_CLR); + rtc_update_irq(rtc_data->rtc, 1, RTC_AF | RTC_IRQF); + return IRQ_HANDLED; } - if (status & BM_RTC_CTRL_ONEMSEC_IRQ) { - stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ, - rtc_data->io + HW_RTC_CTRL); - if (++rtc_data->irq_count % 1000 == 0) { - events |= RTC_UF | RTC_IRQF; - rtc_data->irq_count = 0; - } - } - - if (events) - rtc_update_irq(rtc_data->rtc, 1, events); - - return IRQ_HANDLED; + return IRQ_NONE; } static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); - void __iomem *p = rtc_data->io + HW_RTC_PERSISTENT0, - *ctl = rtc_data->io + HW_RTC_CTRL; if (enabled) { - stmp3xxx_setl(BM_RTC_PERSISTENT0_ALARM_EN | - BM_RTC_PERSISTENT0_ALARM_WAKE_EN, p); - stmp3xxx_setl(BM_RTC_CTRL_ALARM_IRQ_EN, ctl); + writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN | + STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, + rtc_data->io + STMP3XXX_RTC_PERSISTENT0_SET); + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, + rtc_data->io + STMP3XXX_RTC_CTRL_SET); } else { - stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN | - BM_RTC_PERSISTENT0_ALARM_WAKE_EN, p); - stmp3xxx_clearl(BM_RTC_CTRL_ALARM_IRQ_EN, ctl); + writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN | + STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, + rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR); + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, + rtc_data->io + STMP3XXX_RTC_CTRL_CLR); } return 0; } -static int stmp3xxx_update_irq_enable(struct device *dev, unsigned int enabled) -{ - struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); - - if (enabled) - stmp3xxx_setl(BM_RTC_CTRL_ONEMSEC_IRQ_EN, - rtc_data->io + HW_RTC_CTRL); - else - stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN, - rtc_data->io + HW_RTC_CTRL); - return 0; -} - static int stmp3xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); - rtc_time_to_tm(__raw_readl(rtc_data->io + HW_RTC_ALARM), &alm->time); + rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time); return 0; } @@ -142,15 +215,16 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); rtc_tm_to_time(&alm->time, &t); - __raw_writel(t, rtc_data->io + HW_RTC_ALARM); + writel(t, rtc_data->io + STMP3XXX_RTC_ALARM); + + stmp3xxx_alarm_irq_enable(dev, alm->enabled); + return 0; } static struct rtc_class_ops stmp3xxx_rtc_ops = { .alarm_irq_enable = stmp3xxx_alarm_irq_enable, - .update_irq_enable = - stmp3xxx_update_irq_enable, .read_time = stmp3xxx_rtc_gettime, .set_mmss = stmp3xxx_rtc_set_mmss, .read_alarm = stmp3xxx_rtc_read_alarm, @@ -164,13 +238,8 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev) if (!rtc_data) return 0; - stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN | BM_RTC_CTRL_ALARM_IRQ_EN, - rtc_data->io + HW_RTC_CTRL); - free_irq(rtc_data->irq_alarm, &pdev->dev); - free_irq(rtc_data->irq_1msec, &pdev->dev); - rtc_device_unregister(rtc_data->rtc); - iounmap(rtc_data->io); - kfree(rtc_data); + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, + rtc_data->io + STMP3XXX_RTC_CTRL_CLR); return 0; } @@ -181,125 +250,106 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev) struct resource *r; int err; - rtc_data = kzalloc(sizeof *rtc_data, GFP_KERNEL); + rtc_data = devm_kzalloc(&pdev->dev, sizeof(*rtc_data), GFP_KERNEL); if (!rtc_data) return -ENOMEM; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!r) { dev_err(&pdev->dev, "failed to get resource\n"); - err = -ENXIO; - goto out_free; + return -ENXIO; } - rtc_data->io = ioremap(r->start, resource_size(r)); + rtc_data->io = devm_ioremap(&pdev->dev, r->start, resource_size(r)); if (!rtc_data->io) { dev_err(&pdev->dev, "ioremap failed\n"); - err = -EIO; - goto out_free; + return -EIO; } rtc_data->irq_alarm = platform_get_irq(pdev, 0); - rtc_data->irq_1msec = platform_get_irq(pdev, 1); - if (!(__raw_readl(HW_RTC_STAT + rtc_data->io) & - BM_RTC_STAT_RTC_PRESENT)) { + if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) & + STMP3XXX_RTC_STAT_RTC_PRESENT)) { dev_err(&pdev->dev, "no device onboard\n"); - err = -ENODEV; - goto out_remap; + return -ENODEV; } - stmp3xxx_reset_block(rtc_data->io, true); - stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN | - BM_RTC_PERSISTENT0_ALARM_WAKE_EN | - BM_RTC_PERSISTENT0_ALARM_WAKE, - rtc_data->io + HW_RTC_PERSISTENT0); - rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev, - &stmp3xxx_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc_data->rtc)) { - err = PTR_ERR(rtc_data->rtc); - goto out_remap; - } + platform_set_drvdata(pdev, rtc_data); - rtc_data->irq_count = 0; - err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, - IRQF_DISABLED, "RTC alarm", &pdev->dev); + err = stmp_reset_block(rtc_data->io); if (err) { - dev_err(&pdev->dev, "Cannot claim IRQ%d\n", - rtc_data->irq_alarm); - goto out_irq_alarm; + dev_err(&pdev->dev, "stmp_reset_block failed: %d\n", err); + return err; } - err = request_irq(rtc_data->irq_1msec, stmp3xxx_rtc_interrupt, - IRQF_DISABLED, "RTC tick", &pdev->dev); + + writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN | + STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN | + STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE, + rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR); + + writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | + STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, + rtc_data->io + STMP3XXX_RTC_CTRL_CLR); + + rtc_data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &stmp3xxx_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc_data->rtc)) + return PTR_ERR(rtc_data->rtc); + + err = devm_request_irq(&pdev->dev, rtc_data->irq_alarm, + stmp3xxx_rtc_interrupt, 0, "RTC alarm", &pdev->dev); if (err) { dev_err(&pdev->dev, "Cannot claim IRQ%d\n", - rtc_data->irq_1msec); - goto out_irq1; + rtc_data->irq_alarm); + return err; } - platform_set_drvdata(pdev, rtc_data); - + stmp3xxx_wdt_register(pdev); return 0; - -out_irq1: - free_irq(rtc_data->irq_alarm, &pdev->dev); -out_irq_alarm: - stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN | BM_RTC_CTRL_ALARM_IRQ_EN, - rtc_data->io + HW_RTC_CTRL); - rtc_device_unregister(rtc_data->rtc); -out_remap: - iounmap(rtc_data->io); -out_free: - kfree(rtc_data); - return err; } -#ifdef CONFIG_PM -static int stmp3xxx_rtc_suspend(struct platform_device *dev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int stmp3xxx_rtc_suspend(struct device *dev) { return 0; } -static int stmp3xxx_rtc_resume(struct platform_device *dev) +static int stmp3xxx_rtc_resume(struct device *dev) { - struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev); + struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); - stmp3xxx_reset_block(rtc_data->io, true); - stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN | - BM_RTC_PERSISTENT0_ALARM_WAKE_EN | - BM_RTC_PERSISTENT0_ALARM_WAKE, - rtc_data->io + HW_RTC_PERSISTENT0); + stmp_reset_block(rtc_data->io); + writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN | + STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN | + STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE, + rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR); return 0; } -#else -#define stmp3xxx_rtc_suspend NULL -#define stmp3xxx_rtc_resume NULL #endif +static SIMPLE_DEV_PM_OPS(stmp3xxx_rtc_pm_ops, stmp3xxx_rtc_suspend, + stmp3xxx_rtc_resume); + +static const struct of_device_id rtc_dt_ids[] = { + { .compatible = "fsl,stmp3xxx-rtc", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rtc_dt_ids); + static struct platform_driver stmp3xxx_rtcdrv = { .probe = stmp3xxx_rtc_probe, .remove = stmp3xxx_rtc_remove, - .suspend = stmp3xxx_rtc_suspend, - .resume = stmp3xxx_rtc_resume, .driver = { .name = "stmp3xxx-rtc", .owner = THIS_MODULE, + .pm = &stmp3xxx_rtc_pm_ops, + .of_match_table = rtc_dt_ids, }, }; -static int __init stmp3xxx_rtc_init(void) -{ - return platform_driver_register(&stmp3xxx_rtcdrv); -} - -static void __exit stmp3xxx_rtc_exit(void) -{ - platform_driver_unregister(&stmp3xxx_rtcdrv); -} - -module_init(stmp3xxx_rtc_init); -module_exit(stmp3xxx_rtc_exit); +module_platform_driver(stmp3xxx_rtcdrv); MODULE_DESCRIPTION("STMP3xxx RTC Driver"); -MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com>"); +MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and " + "Wolfram Sang <w.sang@pengutronix.de>"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-sun4v.c b/drivers/rtc/rtc-sun4v.c index 5b2261052a6..bc97ff91341 100644 --- a/drivers/rtc/rtc-sun4v.c +++ b/drivers/rtc/rtc-sun4v.c @@ -3,6 +3,8 @@ * Copyright (C) 2008 David S. Miller <davem@davemloft.net> */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.h> @@ -26,10 +28,10 @@ retry: udelay(100); goto retry; } - printk(KERN_WARNING "SUN4V: tod_get() timed out.\n"); + pr_warn("tod_get() timed out.\n"); return 0; } - printk(KERN_WARNING "SUN4V: tod_get() not supported.\n"); + pr_warn("tod_get() not supported.\n"); return 0; } @@ -53,10 +55,10 @@ retry: udelay(100); goto retry; } - printk(KERN_WARNING "SUN4V: tod_set() timed out.\n"); + pr_warn("tod_set() timed out.\n"); return -EAGAIN; } - printk(KERN_WARNING "SUN4V: tod_set() not supported.\n"); + pr_warn("tod_set() not supported.\n"); return -EOPNOTSUPP; } @@ -79,8 +81,10 @@ static const struct rtc_class_ops sun4v_rtc_ops = { static int __init sun4v_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc = rtc_device_register("sun4v", &pdev->dev, - &sun4v_rtc_ops, THIS_MODULE); + struct rtc_device *rtc; + + rtc = devm_rtc_device_register(&pdev->dev, "sun4v", + &sun4v_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); @@ -88,34 +92,14 @@ static int __init sun4v_rtc_probe(struct platform_device *pdev) return 0; } -static int __exit sun4v_rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc = platform_get_drvdata(pdev); - - rtc_device_unregister(rtc); - return 0; -} - static struct platform_driver sun4v_rtc_driver = { .driver = { .name = "rtc-sun4v", .owner = THIS_MODULE, }, - .remove = __exit_p(sun4v_rtc_remove), }; -static int __init sun4v_rtc_init(void) -{ - return platform_driver_probe(&sun4v_rtc_driver, sun4v_rtc_probe); -} - -static void __exit sun4v_rtc_exit(void) -{ - platform_driver_unregister(&sun4v_rtc_driver); -} - -module_init(sun4v_rtc_init); -module_exit(sun4v_rtc_exit); +module_platform_driver_probe(sun4v_rtc_driver, sun4v_rtc_probe); MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); MODULE_DESCRIPTION("SUN4V RTC driver"); diff --git a/drivers/rtc/rtc-sunxi.c b/drivers/rtc/rtc-sunxi.c new file mode 100644 index 00000000000..b6f21f73d50 --- /dev/null +++ b/drivers/rtc/rtc-sunxi.c @@ -0,0 +1,523 @@ +/* + * An RTC driver for Allwinner A10/A20 + * + * Copyright (c) 2013, Carlo Caione <carlo.caione@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/types.h> + +#define SUNXI_LOSC_CTRL 0x0000 +#define SUNXI_LOSC_CTRL_RTC_HMS_ACC BIT(8) +#define SUNXI_LOSC_CTRL_RTC_YMD_ACC BIT(7) + +#define SUNXI_RTC_YMD 0x0004 + +#define SUNXI_RTC_HMS 0x0008 + +#define SUNXI_ALRM_DHMS 0x000c + +#define SUNXI_ALRM_EN 0x0014 +#define SUNXI_ALRM_EN_CNT_EN BIT(8) + +#define SUNXI_ALRM_IRQ_EN 0x0018 +#define SUNXI_ALRM_IRQ_EN_CNT_IRQ_EN BIT(0) + +#define SUNXI_ALRM_IRQ_STA 0x001c +#define SUNXI_ALRM_IRQ_STA_CNT_IRQ_PEND BIT(0) + +#define SUNXI_MASK_DH 0x0000001f +#define SUNXI_MASK_SM 0x0000003f +#define SUNXI_MASK_M 0x0000000f +#define SUNXI_MASK_LY 0x00000001 +#define SUNXI_MASK_D 0x00000ffe +#define SUNXI_MASK_M 0x0000000f + +#define SUNXI_GET(x, mask, shift) (((x) & ((mask) << (shift))) \ + >> (shift)) + +#define SUNXI_SET(x, mask, shift) (((x) & (mask)) << (shift)) + +/* + * Get date values + */ +#define SUNXI_DATE_GET_DAY_VALUE(x) SUNXI_GET(x, SUNXI_MASK_DH, 0) +#define SUNXI_DATE_GET_MON_VALUE(x) SUNXI_GET(x, SUNXI_MASK_M, 8) +#define SUNXI_DATE_GET_YEAR_VALUE(x, mask) SUNXI_GET(x, mask, 16) + +/* + * Get time values + */ +#define SUNXI_TIME_GET_SEC_VALUE(x) SUNXI_GET(x, SUNXI_MASK_SM, 0) +#define SUNXI_TIME_GET_MIN_VALUE(x) SUNXI_GET(x, SUNXI_MASK_SM, 8) +#define SUNXI_TIME_GET_HOUR_VALUE(x) SUNXI_GET(x, SUNXI_MASK_DH, 16) + +/* + * Get alarm values + */ +#define SUNXI_ALRM_GET_SEC_VALUE(x) SUNXI_GET(x, SUNXI_MASK_SM, 0) +#define SUNXI_ALRM_GET_MIN_VALUE(x) SUNXI_GET(x, SUNXI_MASK_SM, 8) +#define SUNXI_ALRM_GET_HOUR_VALUE(x) SUNXI_GET(x, SUNXI_MASK_DH, 16) + +/* + * Set date values + */ +#define SUNXI_DATE_SET_DAY_VALUE(x) SUNXI_DATE_GET_DAY_VALUE(x) +#define SUNXI_DATE_SET_MON_VALUE(x) SUNXI_SET(x, SUNXI_MASK_M, 8) +#define SUNXI_DATE_SET_YEAR_VALUE(x, mask) SUNXI_SET(x, mask, 16) +#define SUNXI_LEAP_SET_VALUE(x, shift) SUNXI_SET(x, SUNXI_MASK_LY, shift) + +/* + * Set time values + */ +#define SUNXI_TIME_SET_SEC_VALUE(x) SUNXI_TIME_GET_SEC_VALUE(x) +#define SUNXI_TIME_SET_MIN_VALUE(x) SUNXI_SET(x, SUNXI_MASK_SM, 8) +#define SUNXI_TIME_SET_HOUR_VALUE(x) SUNXI_SET(x, SUNXI_MASK_DH, 16) + +/* + * Set alarm values + */ +#define SUNXI_ALRM_SET_SEC_VALUE(x) SUNXI_ALRM_GET_SEC_VALUE(x) +#define SUNXI_ALRM_SET_MIN_VALUE(x) SUNXI_SET(x, SUNXI_MASK_SM, 8) +#define SUNXI_ALRM_SET_HOUR_VALUE(x) SUNXI_SET(x, SUNXI_MASK_DH, 16) +#define SUNXI_ALRM_SET_DAY_VALUE(x) SUNXI_SET(x, SUNXI_MASK_D, 21) + +/* + * Time unit conversions + */ +#define SEC_IN_MIN 60 +#define SEC_IN_HOUR (60 * SEC_IN_MIN) +#define SEC_IN_DAY (24 * SEC_IN_HOUR) + +/* + * The year parameter passed to the driver is usually an offset relative to + * the year 1900. This macro is used to convert this offset to another one + * relative to the minimum year allowed by the hardware. + */ +#define SUNXI_YEAR_OFF(x) ((x)->min - 1900) + +/* + * min and max year are arbitrary set considering the limited range of the + * hardware register field + */ +struct sunxi_rtc_data_year { + unsigned int min; /* min year allowed */ + unsigned int max; /* max year allowed */ + unsigned int mask; /* mask for the year field */ + unsigned char leap_shift; /* bit shift to get the leap year */ +}; + +static struct sunxi_rtc_data_year data_year_param[] = { + [0] = { + .min = 2010, + .max = 2073, + .mask = 0x3f, + .leap_shift = 22, + }, + [1] = { + .min = 1970, + .max = 2225, + .mask = 0xff, + .leap_shift = 24, + }, +}; + +struct sunxi_rtc_dev { + struct rtc_device *rtc; + struct device *dev; + struct sunxi_rtc_data_year *data_year; + void __iomem *base; + int irq; +}; + +static irqreturn_t sunxi_rtc_alarmirq(int irq, void *id) +{ + struct sunxi_rtc_dev *chip = (struct sunxi_rtc_dev *) id; + u32 val; + + val = readl(chip->base + SUNXI_ALRM_IRQ_STA); + + if (val & SUNXI_ALRM_IRQ_STA_CNT_IRQ_PEND) { + val |= SUNXI_ALRM_IRQ_STA_CNT_IRQ_PEND; + writel(val, chip->base + SUNXI_ALRM_IRQ_STA); + + rtc_update_irq(chip->rtc, 1, RTC_AF | RTC_IRQF); + + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static void sunxi_rtc_setaie(int to, struct sunxi_rtc_dev *chip) +{ + u32 alrm_val = 0; + u32 alrm_irq_val = 0; + + if (to) { + alrm_val = readl(chip->base + SUNXI_ALRM_EN); + alrm_val |= SUNXI_ALRM_EN_CNT_EN; + + alrm_irq_val = readl(chip->base + SUNXI_ALRM_IRQ_EN); + alrm_irq_val |= SUNXI_ALRM_IRQ_EN_CNT_IRQ_EN; + } else { + writel(SUNXI_ALRM_IRQ_STA_CNT_IRQ_PEND, + chip->base + SUNXI_ALRM_IRQ_STA); + } + + writel(alrm_val, chip->base + SUNXI_ALRM_EN); + writel(alrm_irq_val, chip->base + SUNXI_ALRM_IRQ_EN); +} + +static int sunxi_rtc_getalarm(struct device *dev, struct rtc_wkalrm *wkalrm) +{ + struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); + struct rtc_time *alrm_tm = &wkalrm->time; + u32 alrm; + u32 alrm_en; + u32 date; + + alrm = readl(chip->base + SUNXI_ALRM_DHMS); + date = readl(chip->base + SUNXI_RTC_YMD); + + alrm_tm->tm_sec = SUNXI_ALRM_GET_SEC_VALUE(alrm); + alrm_tm->tm_min = SUNXI_ALRM_GET_MIN_VALUE(alrm); + alrm_tm->tm_hour = SUNXI_ALRM_GET_HOUR_VALUE(alrm); + + alrm_tm->tm_mday = SUNXI_DATE_GET_DAY_VALUE(date); + alrm_tm->tm_mon = SUNXI_DATE_GET_MON_VALUE(date); + alrm_tm->tm_year = SUNXI_DATE_GET_YEAR_VALUE(date, + chip->data_year->mask); + + alrm_tm->tm_mon -= 1; + + /* + * switch from (data_year->min)-relative offset to + * a (1900)-relative one + */ + alrm_tm->tm_year += SUNXI_YEAR_OFF(chip->data_year); + + alrm_en = readl(chip->base + SUNXI_ALRM_IRQ_EN); + if (alrm_en & SUNXI_ALRM_EN_CNT_EN) + wkalrm->enabled = 1; + + return 0; +} + +static int sunxi_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) +{ + struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); + u32 date, time; + + /* + * read again in case it changes + */ + do { + date = readl(chip->base + SUNXI_RTC_YMD); + time = readl(chip->base + SUNXI_RTC_HMS); + } while ((date != readl(chip->base + SUNXI_RTC_YMD)) || + (time != readl(chip->base + SUNXI_RTC_HMS))); + + rtc_tm->tm_sec = SUNXI_TIME_GET_SEC_VALUE(time); + rtc_tm->tm_min = SUNXI_TIME_GET_MIN_VALUE(time); + rtc_tm->tm_hour = SUNXI_TIME_GET_HOUR_VALUE(time); + + rtc_tm->tm_mday = SUNXI_DATE_GET_DAY_VALUE(date); + rtc_tm->tm_mon = SUNXI_DATE_GET_MON_VALUE(date); + rtc_tm->tm_year = SUNXI_DATE_GET_YEAR_VALUE(date, + chip->data_year->mask); + + rtc_tm->tm_mon -= 1; + + /* + * switch from (data_year->min)-relative offset to + * a (1900)-relative one + */ + rtc_tm->tm_year += SUNXI_YEAR_OFF(chip->data_year); + + return rtc_valid_tm(rtc_tm); +} + +static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) +{ + struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); + struct rtc_time *alrm_tm = &wkalrm->time; + struct rtc_time tm_now; + u32 alrm = 0; + unsigned long time_now = 0; + unsigned long time_set = 0; + unsigned long time_gap = 0; + unsigned long time_gap_day = 0; + unsigned long time_gap_hour = 0; + unsigned long time_gap_min = 0; + int ret = 0; + + ret = sunxi_rtc_gettime(dev, &tm_now); + if (ret < 0) { + dev_err(dev, "Error in getting time\n"); + return -EINVAL; + } + + rtc_tm_to_time(alrm_tm, &time_set); + rtc_tm_to_time(&tm_now, &time_now); + if (time_set <= time_now) { + dev_err(dev, "Date to set in the past\n"); + return -EINVAL; + } + + time_gap = time_set - time_now; + time_gap_day = time_gap / SEC_IN_DAY; + time_gap -= time_gap_day * SEC_IN_DAY; + time_gap_hour = time_gap / SEC_IN_HOUR; + time_gap -= time_gap_hour * SEC_IN_HOUR; + time_gap_min = time_gap / SEC_IN_MIN; + time_gap -= time_gap_min * SEC_IN_MIN; + + if (time_gap_day > 255) { + dev_err(dev, "Day must be in the range 0 - 255\n"); + return -EINVAL; + } + + sunxi_rtc_setaie(0, chip); + writel(0, chip->base + SUNXI_ALRM_DHMS); + usleep_range(100, 300); + + alrm = SUNXI_ALRM_SET_SEC_VALUE(time_gap) | + SUNXI_ALRM_SET_MIN_VALUE(time_gap_min) | + SUNXI_ALRM_SET_HOUR_VALUE(time_gap_hour) | + SUNXI_ALRM_SET_DAY_VALUE(time_gap_day); + writel(alrm, chip->base + SUNXI_ALRM_DHMS); + + writel(0, chip->base + SUNXI_ALRM_IRQ_EN); + writel(SUNXI_ALRM_IRQ_EN_CNT_IRQ_EN, chip->base + SUNXI_ALRM_IRQ_EN); + + sunxi_rtc_setaie(wkalrm->enabled, chip); + + return 0; +} + +static int sunxi_rtc_wait(struct sunxi_rtc_dev *chip, int offset, + unsigned int mask, unsigned int ms_timeout) +{ + const unsigned long timeout = jiffies + msecs_to_jiffies(ms_timeout); + u32 reg; + + do { + reg = readl(chip->base + offset); + reg &= mask; + + if (reg == mask) + return 0; + + } while (time_before(jiffies, timeout)); + + return -ETIMEDOUT; +} + +static int sunxi_rtc_settime(struct device *dev, struct rtc_time *rtc_tm) +{ + struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); + u32 date = 0; + u32 time = 0; + int year; + + /* + * the input rtc_tm->tm_year is the offset relative to 1900. We use + * the SUNXI_YEAR_OFF macro to rebase it with respect to the min year + * allowed by the hardware + */ + + year = rtc_tm->tm_year + 1900; + if (year < chip->data_year->min || year > chip->data_year->max) { + dev_err(dev, "rtc only supports year in range %d - %d\n", + chip->data_year->min, chip->data_year->max); + return -EINVAL; + } + + rtc_tm->tm_year -= SUNXI_YEAR_OFF(chip->data_year); + rtc_tm->tm_mon += 1; + + date = SUNXI_DATE_SET_DAY_VALUE(rtc_tm->tm_mday) | + SUNXI_DATE_SET_MON_VALUE(rtc_tm->tm_mon) | + SUNXI_DATE_SET_YEAR_VALUE(rtc_tm->tm_year, + chip->data_year->mask); + + if (is_leap_year(year)) + date |= SUNXI_LEAP_SET_VALUE(1, chip->data_year->leap_shift); + + time = SUNXI_TIME_SET_SEC_VALUE(rtc_tm->tm_sec) | + SUNXI_TIME_SET_MIN_VALUE(rtc_tm->tm_min) | + SUNXI_TIME_SET_HOUR_VALUE(rtc_tm->tm_hour); + + writel(0, chip->base + SUNXI_RTC_HMS); + writel(0, chip->base + SUNXI_RTC_YMD); + + writel(time, chip->base + SUNXI_RTC_HMS); + + /* + * After writing the RTC HH-MM-SS register, the + * SUNXI_LOSC_CTRL_RTC_HMS_ACC bit is set and it will not + * be cleared until the real writing operation is finished + */ + + if (sunxi_rtc_wait(chip, SUNXI_LOSC_CTRL, + SUNXI_LOSC_CTRL_RTC_HMS_ACC, 50)) { + dev_err(dev, "Failed to set rtc time.\n"); + return -1; + } + + writel(date, chip->base + SUNXI_RTC_YMD); + + /* + * After writing the RTC YY-MM-DD register, the + * SUNXI_LOSC_CTRL_RTC_YMD_ACC bit is set and it will not + * be cleared until the real writing operation is finished + */ + + if (sunxi_rtc_wait(chip, SUNXI_LOSC_CTRL, + SUNXI_LOSC_CTRL_RTC_YMD_ACC, 50)) { + dev_err(dev, "Failed to set rtc time.\n"); + return -1; + } + + return 0; +} + +static int sunxi_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); + + if (!enabled) + sunxi_rtc_setaie(enabled, chip); + + return 0; +} + +static const struct rtc_class_ops sunxi_rtc_ops = { + .read_time = sunxi_rtc_gettime, + .set_time = sunxi_rtc_settime, + .read_alarm = sunxi_rtc_getalarm, + .set_alarm = sunxi_rtc_setalarm, + .alarm_irq_enable = sunxi_rtc_alarm_irq_enable +}; + +static const struct of_device_id sunxi_rtc_dt_ids[] = { + { .compatible = "allwinner,sun4i-a10-rtc", .data = &data_year_param[0] }, + { .compatible = "allwinner,sun7i-a20-rtc", .data = &data_year_param[1] }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, sunxi_rtc_dt_ids); + +static int sunxi_rtc_probe(struct platform_device *pdev) +{ + struct sunxi_rtc_dev *chip; + struct resource *res; + const struct of_device_id *of_id; + int ret; + + chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + platform_set_drvdata(pdev, chip); + chip->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + chip->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(chip->base)) + return PTR_ERR(chip->base); + + chip->irq = platform_get_irq(pdev, 0); + if (chip->irq < 0) { + dev_err(&pdev->dev, "No IRQ resource\n"); + return chip->irq; + } + ret = devm_request_irq(&pdev->dev, chip->irq, sunxi_rtc_alarmirq, + 0, dev_name(&pdev->dev), chip); + if (ret) { + dev_err(&pdev->dev, "Could not request IRQ\n"); + return ret; + } + + of_id = of_match_device(sunxi_rtc_dt_ids, &pdev->dev); + if (!of_id) { + dev_err(&pdev->dev, "Unable to setup RTC data\n"); + return -ENODEV; + } + chip->data_year = (struct sunxi_rtc_data_year *) of_id->data; + + /* clear the alarm count value */ + writel(0, chip->base + SUNXI_ALRM_DHMS); + + /* disable alarm, not generate irq pending */ + writel(0, chip->base + SUNXI_ALRM_EN); + + /* disable alarm week/cnt irq, unset to cpu */ + writel(0, chip->base + SUNXI_ALRM_IRQ_EN); + + /* clear alarm week/cnt irq pending */ + writel(SUNXI_ALRM_IRQ_STA_CNT_IRQ_PEND, chip->base + + SUNXI_ALRM_IRQ_STA); + + chip->rtc = rtc_device_register("rtc-sunxi", &pdev->dev, + &sunxi_rtc_ops, THIS_MODULE); + if (IS_ERR(chip->rtc)) { + dev_err(&pdev->dev, "unable to register device\n"); + return PTR_ERR(chip->rtc); + } + + dev_info(&pdev->dev, "RTC enabled\n"); + + return 0; +} + +static int sunxi_rtc_remove(struct platform_device *pdev) +{ + struct sunxi_rtc_dev *chip = platform_get_drvdata(pdev); + + rtc_device_unregister(chip->rtc); + + return 0; +} + +static struct platform_driver sunxi_rtc_driver = { + .probe = sunxi_rtc_probe, + .remove = sunxi_rtc_remove, + .driver = { + .name = "sunxi-rtc", + .owner = THIS_MODULE, + .of_match_table = sunxi_rtc_dt_ids, + }, +}; + +module_platform_driver(sunxi_rtc_driver); + +MODULE_DESCRIPTION("sunxi RTC driver"); +MODULE_AUTHOR("Carlo Caione <carlo.caione@gmail.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c index 380083ca572..babd43bf3dd 100644 --- a/drivers/rtc/rtc-sysfs.c +++ b/drivers/rtc/rtc-sysfs.c @@ -25,15 +25,14 @@ */ static ssize_t -rtc_sysfs_show_name(struct device *dev, struct device_attribute *attr, - char *buf) +name_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", to_rtc_device(dev)->name); } +static DEVICE_ATTR_RO(name); static ssize_t -rtc_sysfs_show_date(struct device *dev, struct device_attribute *attr, - char *buf) +date_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; struct rtc_time tm; @@ -46,10 +45,10 @@ rtc_sysfs_show_date(struct device *dev, struct device_attribute *attr, return retval; } +static DEVICE_ATTR_RO(date); static ssize_t -rtc_sysfs_show_time(struct device *dev, struct device_attribute *attr, - char *buf) +time_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; struct rtc_time tm; @@ -62,10 +61,10 @@ rtc_sysfs_show_time(struct device *dev, struct device_attribute *attr, return retval; } +static DEVICE_ATTR_RO(time); static ssize_t -rtc_sysfs_show_since_epoch(struct device *dev, struct device_attribute *attr, - char *buf) +since_epoch_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; struct rtc_time tm; @@ -79,16 +78,16 @@ rtc_sysfs_show_since_epoch(struct device *dev, struct device_attribute *attr, return retval; } +static DEVICE_ATTR_RO(since_epoch); static ssize_t -rtc_sysfs_show_max_user_freq(struct device *dev, struct device_attribute *attr, - char *buf) +max_user_freq_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", to_rtc_device(dev)->max_user_freq); } static ssize_t -rtc_sysfs_set_max_user_freq(struct device *dev, struct device_attribute *attr, +max_user_freq_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct rtc_device *rtc = to_rtc_device(dev); @@ -101,10 +100,16 @@ rtc_sysfs_set_max_user_freq(struct device *dev, struct device_attribute *attr, return n; } +static DEVICE_ATTR_RW(max_user_freq); +/** + * rtc_sysfs_show_hctosys - indicate if the given RTC set the system time + * + * Returns 1 if the system clock was set by this RTC at the last + * boot or resume event. + */ static ssize_t -rtc_sysfs_show_hctosys(struct device *dev, struct device_attribute *attr, - char *buf) +hctosys_show(struct device *dev, struct device_attribute *attr, char *buf) { #ifdef CONFIG_RTC_HCTOSYS_DEVICE if (rtc_hctosys_ret == 0 && @@ -115,17 +120,18 @@ rtc_sysfs_show_hctosys(struct device *dev, struct device_attribute *attr, #endif return sprintf(buf, "0\n"); } - -static struct device_attribute rtc_attrs[] = { - __ATTR(name, S_IRUGO, rtc_sysfs_show_name, NULL), - __ATTR(date, S_IRUGO, rtc_sysfs_show_date, NULL), - __ATTR(time, S_IRUGO, rtc_sysfs_show_time, NULL), - __ATTR(since_epoch, S_IRUGO, rtc_sysfs_show_since_epoch, NULL), - __ATTR(max_user_freq, S_IRUGO | S_IWUSR, rtc_sysfs_show_max_user_freq, - rtc_sysfs_set_max_user_freq), - __ATTR(hctosys, S_IRUGO, rtc_sysfs_show_hctosys, NULL), - { }, +static DEVICE_ATTR_RO(hctosys); + +static struct attribute *rtc_attrs[] = { + &dev_attr_name.attr, + &dev_attr_date.attr, + &dev_attr_time.attr, + &dev_attr_since_epoch.attr, + &dev_attr_max_user_freq.attr, + &dev_attr_hctosys.attr, + NULL, }; +ATTRIBUTE_GROUPS(rtc); static ssize_t rtc_sysfs_show_wakealarm(struct device *dev, struct device_attribute *attr, @@ -158,6 +164,7 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, { ssize_t retval; unsigned long now, alarm; + unsigned long push = 0; struct rtc_wkalrm alm; struct rtc_device *rtc = to_rtc_device(dev); char *buf_ptr; @@ -174,13 +181,17 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, buf_ptr = (char *)buf; if (*buf_ptr == '+') { buf_ptr++; - adjust = 1; + if (*buf_ptr == '=') { + buf_ptr++; + push = 1; + } else + adjust = 1; } alarm = simple_strtoul(buf_ptr, NULL, 0); if (adjust) { alarm += now; } - if (alarm > now) { + if (alarm > now || push) { /* Avoid accidentally clobbering active alarms; we can't * entirely prevent that here, without even the minimal * locking from the /dev/rtcN api. @@ -188,9 +199,14 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, retval = rtc_read_alarm(rtc, &alm); if (retval < 0) return retval; - if (alm.enabled) - return -EBUSY; - + if (alm.enabled) { + if (push) { + rtc_tm_to_time(&alm.time, &push); + alarm += push; + } else + return -EBUSY; + } else if (push) + return -EINVAL; alm.enabled = 1; } else { alm.enabled = 0; @@ -245,5 +261,5 @@ void rtc_sysfs_del_device(struct rtc_device *rtc) void __init rtc_sysfs_init(struct class *rtc_class) { - rtc_class->dev_attrs = rtc_attrs; + rtc_class->dev_groups = rtc_groups; } diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c new file mode 100644 index 00000000000..76af92ad5a8 --- /dev/null +++ b/drivers/rtc/rtc-tegra.c @@ -0,0 +1,433 @@ +/* + * An RTC driver for the NVIDIA Tegra 200 series internal RTC. + * + * Copyright (c) 2010, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/pm.h> + +/* set to 1 = busy every eight 32kHz clocks during copy of sec+msec to AHB */ +#define TEGRA_RTC_REG_BUSY 0x004 +#define TEGRA_RTC_REG_SECONDS 0x008 +/* when msec is read, the seconds are buffered into shadow seconds. */ +#define TEGRA_RTC_REG_SHADOW_SECONDS 0x00c +#define TEGRA_RTC_REG_MILLI_SECONDS 0x010 +#define TEGRA_RTC_REG_SECONDS_ALARM0 0x014 +#define TEGRA_RTC_REG_SECONDS_ALARM1 0x018 +#define TEGRA_RTC_REG_MILLI_SECONDS_ALARM0 0x01c +#define TEGRA_RTC_REG_INTR_MASK 0x028 +/* write 1 bits to clear status bits */ +#define TEGRA_RTC_REG_INTR_STATUS 0x02c + +/* bits in INTR_MASK */ +#define TEGRA_RTC_INTR_MASK_MSEC_CDN_ALARM (1<<4) +#define TEGRA_RTC_INTR_MASK_SEC_CDN_ALARM (1<<3) +#define TEGRA_RTC_INTR_MASK_MSEC_ALARM (1<<2) +#define TEGRA_RTC_INTR_MASK_SEC_ALARM1 (1<<1) +#define TEGRA_RTC_INTR_MASK_SEC_ALARM0 (1<<0) + +/* bits in INTR_STATUS */ +#define TEGRA_RTC_INTR_STATUS_MSEC_CDN_ALARM (1<<4) +#define TEGRA_RTC_INTR_STATUS_SEC_CDN_ALARM (1<<3) +#define TEGRA_RTC_INTR_STATUS_MSEC_ALARM (1<<2) +#define TEGRA_RTC_INTR_STATUS_SEC_ALARM1 (1<<1) +#define TEGRA_RTC_INTR_STATUS_SEC_ALARM0 (1<<0) + +struct tegra_rtc_info { + struct platform_device *pdev; + struct rtc_device *rtc_dev; + void __iomem *rtc_base; /* NULL if not initialized. */ + int tegra_rtc_irq; /* alarm and periodic irq */ + spinlock_t tegra_rtc_lock; +}; + +/* RTC hardware is busy when it is updating its values over AHB once + * every eight 32kHz clocks (~250uS). + * outside of these updates the CPU is free to write. + * CPU is always free to read. + */ +static inline u32 tegra_rtc_check_busy(struct tegra_rtc_info *info) +{ + return readl(info->rtc_base + TEGRA_RTC_REG_BUSY) & 1; +} + +/* Wait for hardware to be ready for writing. + * This function tries to maximize the amount of time before the next update. + * It does this by waiting for the RTC to become busy with its periodic update, + * then returning once the RTC first becomes not busy. + * This periodic update (where the seconds and milliseconds are copied to the + * AHB side) occurs every eight 32kHz clocks (~250uS). + * The behavior of this function allows us to make some assumptions without + * introducing a race, because 250uS is plenty of time to read/write a value. + */ +static int tegra_rtc_wait_while_busy(struct device *dev) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + + int retries = 500; /* ~490 us is the worst case, ~250 us is best. */ + + /* first wait for the RTC to become busy. this is when it + * posts its updated seconds+msec registers to AHB side. */ + while (tegra_rtc_check_busy(info)) { + if (!retries--) + goto retry_failed; + udelay(1); + } + + /* now we have about 250 us to manipulate registers */ + return 0; + +retry_failed: + dev_err(dev, "write failed:retry count exceeded.\n"); + return -ETIMEDOUT; +} + +static int tegra_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + unsigned long sec, msec; + unsigned long sl_irq_flags; + + /* RTC hardware copies seconds to shadow seconds when a read + * of milliseconds occurs. use a lock to keep other threads out. */ + spin_lock_irqsave(&info->tegra_rtc_lock, sl_irq_flags); + + msec = readl(info->rtc_base + TEGRA_RTC_REG_MILLI_SECONDS); + sec = readl(info->rtc_base + TEGRA_RTC_REG_SHADOW_SECONDS); + + spin_unlock_irqrestore(&info->tegra_rtc_lock, sl_irq_flags); + + rtc_time_to_tm(sec, tm); + + dev_vdbg(dev, "time read as %lu. %d/%d/%d %d:%02u:%02u\n", + sec, + tm->tm_mon + 1, + tm->tm_mday, + tm->tm_year + 1900, + tm->tm_hour, + tm->tm_min, + tm->tm_sec + ); + + return 0; +} + +static int tegra_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + unsigned long sec; + int ret; + + /* convert tm to seconds. */ + ret = rtc_valid_tm(tm); + if (ret) + return ret; + + rtc_tm_to_time(tm, &sec); + + dev_vdbg(dev, "time set to %lu. %d/%d/%d %d:%02u:%02u\n", + sec, + tm->tm_mon+1, + tm->tm_mday, + tm->tm_year+1900, + tm->tm_hour, + tm->tm_min, + tm->tm_sec + ); + + /* seconds only written if wait succeeded. */ + ret = tegra_rtc_wait_while_busy(dev); + if (!ret) + writel(sec, info->rtc_base + TEGRA_RTC_REG_SECONDS); + + dev_vdbg(dev, "time read back as %d\n", + readl(info->rtc_base + TEGRA_RTC_REG_SECONDS)); + + return ret; +} + +static int tegra_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + unsigned long sec; + unsigned tmp; + + sec = readl(info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0); + + if (sec == 0) { + /* alarm is disabled. */ + alarm->enabled = 0; + alarm->time.tm_mon = -1; + alarm->time.tm_mday = -1; + alarm->time.tm_year = -1; + alarm->time.tm_hour = -1; + alarm->time.tm_min = -1; + alarm->time.tm_sec = -1; + } else { + /* alarm is enabled. */ + alarm->enabled = 1; + rtc_time_to_tm(sec, &alarm->time); + } + + tmp = readl(info->rtc_base + TEGRA_RTC_REG_INTR_STATUS); + alarm->pending = (tmp & TEGRA_RTC_INTR_STATUS_SEC_ALARM0) != 0; + + return 0; +} + +static int tegra_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + unsigned status; + unsigned long sl_irq_flags; + + tegra_rtc_wait_while_busy(dev); + spin_lock_irqsave(&info->tegra_rtc_lock, sl_irq_flags); + + /* read the original value, and OR in the flag. */ + status = readl(info->rtc_base + TEGRA_RTC_REG_INTR_MASK); + if (enabled) + status |= TEGRA_RTC_INTR_MASK_SEC_ALARM0; /* set it */ + else + status &= ~TEGRA_RTC_INTR_MASK_SEC_ALARM0; /* clear it */ + + writel(status, info->rtc_base + TEGRA_RTC_REG_INTR_MASK); + + spin_unlock_irqrestore(&info->tegra_rtc_lock, sl_irq_flags); + + return 0; +} + +static int tegra_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + unsigned long sec; + + if (alarm->enabled) + rtc_tm_to_time(&alarm->time, &sec); + else + sec = 0; + + tegra_rtc_wait_while_busy(dev); + writel(sec, info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0); + dev_vdbg(dev, "alarm read back as %d\n", + readl(info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0)); + + /* if successfully written and alarm is enabled ... */ + if (sec) { + tegra_rtc_alarm_irq_enable(dev, 1); + + dev_vdbg(dev, "alarm set as %lu. %d/%d/%d %d:%02u:%02u\n", + sec, + alarm->time.tm_mon+1, + alarm->time.tm_mday, + alarm->time.tm_year+1900, + alarm->time.tm_hour, + alarm->time.tm_min, + alarm->time.tm_sec); + } else { + /* disable alarm if 0 or write error. */ + dev_vdbg(dev, "alarm disabled\n"); + tegra_rtc_alarm_irq_enable(dev, 0); + } + + return 0; +} + +static int tegra_rtc_proc(struct device *dev, struct seq_file *seq) +{ + if (!dev || !dev->driver) + return 0; + + return seq_printf(seq, "name\t\t: %s\n", dev_name(dev)); +} + +static irqreturn_t tegra_rtc_irq_handler(int irq, void *data) +{ + struct device *dev = data; + struct tegra_rtc_info *info = dev_get_drvdata(dev); + unsigned long events = 0; + unsigned status; + unsigned long sl_irq_flags; + + status = readl(info->rtc_base + TEGRA_RTC_REG_INTR_STATUS); + if (status) { + /* clear the interrupt masks and status on any irq. */ + tegra_rtc_wait_while_busy(dev); + spin_lock_irqsave(&info->tegra_rtc_lock, sl_irq_flags); + writel(0, info->rtc_base + TEGRA_RTC_REG_INTR_MASK); + writel(status, info->rtc_base + TEGRA_RTC_REG_INTR_STATUS); + spin_unlock_irqrestore(&info->tegra_rtc_lock, sl_irq_flags); + } + + /* check if Alarm */ + if ((status & TEGRA_RTC_INTR_STATUS_SEC_ALARM0)) + events |= RTC_IRQF | RTC_AF; + + /* check if Periodic */ + if ((status & TEGRA_RTC_INTR_STATUS_SEC_CDN_ALARM)) + events |= RTC_IRQF | RTC_PF; + + rtc_update_irq(info->rtc_dev, 1, events); + + return IRQ_HANDLED; +} + +static struct rtc_class_ops tegra_rtc_ops = { + .read_time = tegra_rtc_read_time, + .set_time = tegra_rtc_set_time, + .read_alarm = tegra_rtc_read_alarm, + .set_alarm = tegra_rtc_set_alarm, + .proc = tegra_rtc_proc, + .alarm_irq_enable = tegra_rtc_alarm_irq_enable, +}; + +static const struct of_device_id tegra_rtc_dt_match[] = { + { .compatible = "nvidia,tegra20-rtc", }, + {} +}; +MODULE_DEVICE_TABLE(of, tegra_rtc_dt_match); + +static int __init tegra_rtc_probe(struct platform_device *pdev) +{ + struct tegra_rtc_info *info; + struct resource *res; + int ret; + + info = devm_kzalloc(&pdev->dev, sizeof(struct tegra_rtc_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + info->rtc_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(info->rtc_base)) + return PTR_ERR(info->rtc_base); + + info->tegra_rtc_irq = platform_get_irq(pdev, 0); + if (info->tegra_rtc_irq <= 0) + return -EBUSY; + + /* set context info. */ + info->pdev = pdev; + spin_lock_init(&info->tegra_rtc_lock); + + platform_set_drvdata(pdev, info); + + /* clear out the hardware. */ + writel(0, info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0); + writel(0xffffffff, info->rtc_base + TEGRA_RTC_REG_INTR_STATUS); + writel(0, info->rtc_base + TEGRA_RTC_REG_INTR_MASK); + + device_init_wakeup(&pdev->dev, 1); + + info->rtc_dev = devm_rtc_device_register(&pdev->dev, + dev_name(&pdev->dev), &tegra_rtc_ops, + THIS_MODULE); + if (IS_ERR(info->rtc_dev)) { + ret = PTR_ERR(info->rtc_dev); + dev_err(&pdev->dev, "Unable to register device (err=%d).\n", + ret); + return ret; + } + + ret = devm_request_irq(&pdev->dev, info->tegra_rtc_irq, + tegra_rtc_irq_handler, IRQF_TRIGGER_HIGH, + dev_name(&pdev->dev), &pdev->dev); + if (ret) { + dev_err(&pdev->dev, + "Unable to request interrupt for device (err=%d).\n", + ret); + return ret; + } + + dev_notice(&pdev->dev, "Tegra internal Real Time Clock\n"); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tegra_rtc_suspend(struct device *dev) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + + tegra_rtc_wait_while_busy(dev); + + /* only use ALARM0 as a wake source. */ + writel(0xffffffff, info->rtc_base + TEGRA_RTC_REG_INTR_STATUS); + writel(TEGRA_RTC_INTR_STATUS_SEC_ALARM0, + info->rtc_base + TEGRA_RTC_REG_INTR_MASK); + + dev_vdbg(dev, "alarm sec = %d\n", + readl(info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0)); + + dev_vdbg(dev, "Suspend (device_may_wakeup=%d) irq:%d\n", + device_may_wakeup(dev), info->tegra_rtc_irq); + + /* leave the alarms on as a wake source. */ + if (device_may_wakeup(dev)) + enable_irq_wake(info->tegra_rtc_irq); + + return 0; +} + +static int tegra_rtc_resume(struct device *dev) +{ + struct tegra_rtc_info *info = dev_get_drvdata(dev); + + dev_vdbg(dev, "Resume (device_may_wakeup=%d)\n", + device_may_wakeup(dev)); + /* alarms were left on as a wake source, turn them off. */ + if (device_may_wakeup(dev)) + disable_irq_wake(info->tegra_rtc_irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(tegra_rtc_pm_ops, tegra_rtc_suspend, tegra_rtc_resume); + +static void tegra_rtc_shutdown(struct platform_device *pdev) +{ + dev_vdbg(&pdev->dev, "disabling interrupts.\n"); + tegra_rtc_alarm_irq_enable(&pdev->dev, 0); +} + +MODULE_ALIAS("platform:tegra_rtc"); +static struct platform_driver tegra_rtc_driver = { + .shutdown = tegra_rtc_shutdown, + .driver = { + .name = "tegra_rtc", + .owner = THIS_MODULE, + .of_match_table = tegra_rtc_dt_match, + .pm = &tegra_rtc_pm_ops, + }, +}; + +module_platform_driver_probe(tegra_rtc_driver, tegra_rtc_probe); + +MODULE_AUTHOR("Jon Mayo <jmayo@nvidia.com>"); +MODULE_DESCRIPTION("driver for Tegra internal RTC"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c index 51725f7755b..6599c20bc45 100644 --- a/drivers/rtc/rtc-test.c +++ b/drivers/rtc/rtc-test.c @@ -50,24 +50,9 @@ static int test_rtc_proc(struct device *dev, struct seq_file *seq) return 0; } -static int test_rtc_ioctl(struct device *dev, unsigned int cmd, - unsigned long arg) +static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) { - /* We do support interrupts, they're generated - * using the sysfs interface. - */ - switch (cmd) { - case RTC_PIE_ON: - case RTC_PIE_OFF: - case RTC_UIE_ON: - case RTC_UIE_OFF: - case RTC_AIE_ON: - case RTC_AIE_OFF: - return 0; - - default: - return -ENOIOCTLCMD; - } + return 0; } static const struct rtc_class_ops test_rtc_ops = { @@ -76,7 +61,7 @@ static const struct rtc_class_ops test_rtc_ops = { .read_alarm = test_rtc_read_alarm, .set_alarm = test_rtc_set_alarm, .set_mmss = test_rtc_set_mmss, - .ioctl = test_rtc_ioctl, + .alarm_irq_enable = test_rtc_alarm_irq_enable, }; static ssize_t test_irq_show(struct device *dev, @@ -93,11 +78,16 @@ static ssize_t test_irq_store(struct device *dev, struct rtc_device *rtc = platform_get_drvdata(plat_dev); retval = count; - if (strncmp(buf, "tick", 4) == 0) + if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled) rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF); - else if (strncmp(buf, "alarm", 5) == 0) - rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); - else if (strncmp(buf, "update", 6) == 0) + else if (strncmp(buf, "alarm", 5) == 0) { + struct rtc_wkalrm alrm; + int err = rtc_read_alarm(rtc, &alrm); + + if (!err && alrm.enabled) + rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); + + } else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled) rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF); else retval = -EINVAL; @@ -109,31 +99,26 @@ static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); static int test_probe(struct platform_device *plat_dev) { int err; - struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev, - &test_rtc_ops, THIS_MODULE); + struct rtc_device *rtc; + + rtc = devm_rtc_device_register(&plat_dev->dev, "test", + &test_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { - err = PTR_ERR(rtc); - return err; + return PTR_ERR(rtc); } err = device_create_file(&plat_dev->dev, &dev_attr_irq); if (err) - goto err; + dev_err(&plat_dev->dev, "Unable to create sysfs entry: %s\n", + dev_attr_irq.attr.name); platform_set_drvdata(plat_dev, rtc); return 0; - -err: - rtc_device_unregister(rtc); - return err; } -static int __devexit test_remove(struct platform_device *plat_dev) +static int test_remove(struct platform_device *plat_dev) { - struct rtc_device *rtc = platform_get_drvdata(plat_dev); - - rtc_device_unregister(rtc); device_remove_file(&plat_dev->dev, &dev_attr_irq); return 0; @@ -141,7 +126,7 @@ static int __devexit test_remove(struct platform_device *plat_dev) static struct platform_driver test_driver = { .probe = test_probe, - .remove = __devexit_p(test_remove), + .remove = test_remove, .driver = { .name = "rtc-test", .owner = THIS_MODULE, @@ -162,24 +147,24 @@ static int __init test_init(void) if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) { err = -ENOMEM; - goto exit_free_test0; + goto exit_put_test0; } if ((err = platform_device_add(test0))) - goto exit_free_test1; + goto exit_put_test1; if ((err = platform_device_add(test1))) - goto exit_device_unregister; + goto exit_del_test0; return 0; -exit_device_unregister: - platform_device_unregister(test0); +exit_del_test0: + platform_device_del(test0); -exit_free_test1: +exit_put_test1: platform_device_put(test1); -exit_free_test0: +exit_put_test0: platform_device_put(test0); exit_driver_unregister: diff --git a/drivers/rtc/rtc-tile.c b/drivers/rtc/rtc-tile.c new file mode 100644 index 00000000000..ff9632eb79f --- /dev/null +++ b/drivers/rtc/rtc-tile.c @@ -0,0 +1,147 @@ +/* + * Copyright 2011 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * Tilera-specific RTC driver. + */ + +#include <linux/module.h> +#include <linux/device.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> + +/* Platform device pointer. */ +static struct platform_device *tile_rtc_platform_device; + +/* + * RTC read routine. Gets time info from RTC chip via hypervisor syscall. + */ +static int read_rtc_time(struct device *dev, struct rtc_time *tm) +{ + HV_RTCTime hvtm = hv_get_rtc(); + + tm->tm_sec = hvtm.tm_sec; + tm->tm_min = hvtm.tm_min; + tm->tm_hour = hvtm.tm_hour; + tm->tm_mday = hvtm.tm_mday; + tm->tm_mon = hvtm.tm_mon; + tm->tm_year = hvtm.tm_year; + tm->tm_wday = 0; + tm->tm_yday = 0; + tm->tm_isdst = 0; + + if (rtc_valid_tm(tm) < 0) + dev_warn(dev, "Read invalid date/time from RTC\n"); + + return 0; +} + +/* + * RTC write routine. Sends time info to hypervisor via syscall, to be + * written to RTC chip. + */ +static int set_rtc_time(struct device *dev, struct rtc_time *tm) +{ + HV_RTCTime hvtm; + + hvtm.tm_sec = tm->tm_sec; + hvtm.tm_min = tm->tm_min; + hvtm.tm_hour = tm->tm_hour; + hvtm.tm_mday = tm->tm_mday; + hvtm.tm_mon = tm->tm_mon; + hvtm.tm_year = tm->tm_year; + + hv_set_rtc(hvtm); + + return 0; +} + +/* + * RTC read/write ops. + */ +static const struct rtc_class_ops tile_rtc_ops = { + .read_time = read_rtc_time, + .set_time = set_rtc_time, +}; + +/* + * Device probe routine. + */ +static int tile_rtc_probe(struct platform_device *dev) +{ + struct rtc_device *rtc; + + rtc = devm_rtc_device_register(&dev->dev, "tile", + &tile_rtc_ops, THIS_MODULE); + + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + platform_set_drvdata(dev, rtc); + + return 0; +} + +static struct platform_driver tile_rtc_platform_driver = { + .driver = { + .name = "rtc-tile", + .owner = THIS_MODULE, + }, + .probe = tile_rtc_probe, +}; + +/* + * Driver init routine. + */ +static int __init tile_rtc_driver_init(void) +{ + int err; + + err = platform_driver_register(&tile_rtc_platform_driver); + if (err) + return err; + + tile_rtc_platform_device = platform_device_alloc("rtc-tile", 0); + if (tile_rtc_platform_device == NULL) { + err = -ENOMEM; + goto exit_driver_unregister; + } + + err = platform_device_add(tile_rtc_platform_device); + if (err) + goto exit_device_put; + + return 0; + +exit_device_put: + platform_device_put(tile_rtc_platform_device); + +exit_driver_unregister: + platform_driver_unregister(&tile_rtc_platform_driver); + return err; +} + +/* + * Driver cleanup routine. + */ +static void __exit tile_rtc_driver_exit(void) +{ + platform_device_unregister(tile_rtc_platform_device); + platform_driver_unregister(&tile_rtc_platform_driver); +} + +module_init(tile_rtc_driver_init); +module_exit(tile_rtc_driver_exit); + +MODULE_DESCRIPTION("Tilera-specific Real Time Clock Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:rtc-tile"); diff --git a/drivers/rtc/rtc-tps6586x.c b/drivers/rtc/rtc-tps6586x.c new file mode 100644 index 00000000000..426901cef14 --- /dev/null +++ b/drivers/rtc/rtc-tps6586x.c @@ -0,0 +1,351 @@ +/* + * rtc-tps6586x.c: RTC driver for TI PMIC TPS6586X + * + * Copyright (c) 2012, NVIDIA Corporation. + * + * Author: Laxman Dewangan <ldewangan@nvidia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307, USA + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mfd/tps6586x.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/rtc.h> +#include <linux/slab.h> + +#define RTC_CTRL 0xc0 +#define POR_RESET_N BIT(7) +#define OSC_SRC_SEL BIT(6) +#define RTC_ENABLE BIT(5) /* enables alarm */ +#define RTC_BUF_ENABLE BIT(4) /* 32 KHz buffer enable */ +#define PRE_BYPASS BIT(3) /* 0=1KHz or 1=32KHz updates */ +#define CL_SEL_MASK (BIT(2)|BIT(1)) +#define CL_SEL_POS 1 +#define RTC_ALARM1_HI 0xc1 +#define RTC_COUNT4 0xc6 + +/* start a PMU RTC access by reading the register prior to the RTC_COUNT4 */ +#define RTC_COUNT4_DUMMYREAD 0xc5 + +/*only 14-bits width in second*/ +#define ALM1_VALID_RANGE_IN_SEC 0x3FFF + +#define TPS6586X_RTC_CL_SEL_1_5PF 0x0 +#define TPS6586X_RTC_CL_SEL_6_5PF 0x1 +#define TPS6586X_RTC_CL_SEL_7_5PF 0x2 +#define TPS6586X_RTC_CL_SEL_12_5PF 0x3 + +struct tps6586x_rtc { + struct device *dev; + struct rtc_device *rtc; + int irq; + bool irq_en; + unsigned long long epoch_start; +}; + +static inline struct device *to_tps6586x_dev(struct device *dev) +{ + return dev->parent; +} + +static int tps6586x_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long long ticks = 0; + unsigned long seconds; + u8 buff[6]; + int ret; + int i; + + ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD, sizeof(buff), buff); + if (ret < 0) { + dev_err(dev, "read counter failed with err %d\n", ret); + return ret; + } + + for (i = 1; i < sizeof(buff); i++) { + ticks <<= 8; + ticks |= buff[i]; + } + + seconds = ticks >> 10; + seconds += rtc->epoch_start; + rtc_time_to_tm(seconds, tm); + return rtc_valid_tm(tm); +} + +static int tps6586x_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long long ticks; + unsigned long seconds; + u8 buff[5]; + int ret; + + rtc_tm_to_time(tm, &seconds); + if (seconds < rtc->epoch_start) { + dev_err(dev, "requested time unsupported\n"); + return -EINVAL; + } + seconds -= rtc->epoch_start; + + ticks = (unsigned long long)seconds << 10; + buff[0] = (ticks >> 32) & 0xff; + buff[1] = (ticks >> 24) & 0xff; + buff[2] = (ticks >> 16) & 0xff; + buff[3] = (ticks >> 8) & 0xff; + buff[4] = ticks & 0xff; + + /* Disable RTC before changing time */ + ret = tps6586x_clr_bits(tps_dev, RTC_CTRL, RTC_ENABLE); + if (ret < 0) { + dev_err(dev, "failed to clear RTC_ENABLE\n"); + return ret; + } + + ret = tps6586x_writes(tps_dev, RTC_COUNT4, sizeof(buff), buff); + if (ret < 0) { + dev_err(dev, "failed to program new time\n"); + return ret; + } + + /* Enable RTC */ + ret = tps6586x_set_bits(tps_dev, RTC_CTRL, RTC_ENABLE); + if (ret < 0) { + dev_err(dev, "failed to set RTC_ENABLE\n"); + return ret; + } + return 0; +} + +static int tps6586x_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + + if (enabled && !rtc->irq_en) { + enable_irq(rtc->irq); + rtc->irq_en = true; + } else if (!enabled && rtc->irq_en) { + disable_irq(rtc->irq); + rtc->irq_en = false; + } + return 0; +} + +static int tps6586x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long seconds; + unsigned long ticks; + unsigned long rtc_current_time; + unsigned long long rticks = 0; + u8 buff[3]; + u8 rbuff[6]; + int ret; + int i; + + rtc_tm_to_time(&alrm->time, &seconds); + + if (alrm->enabled && (seconds < rtc->epoch_start)) { + dev_err(dev, "can't set alarm to requested time\n"); + return -EINVAL; + } + + ret = tps6586x_rtc_alarm_irq_enable(dev, alrm->enabled); + if (ret < 0) { + dev_err(dev, "can't set alarm irq, err %d\n", ret); + return ret; + } + + seconds -= rtc->epoch_start; + ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD, + sizeof(rbuff), rbuff); + if (ret < 0) { + dev_err(dev, "read counter failed with err %d\n", ret); + return ret; + } + + for (i = 1; i < sizeof(rbuff); i++) { + rticks <<= 8; + rticks |= rbuff[i]; + } + + rtc_current_time = rticks >> 10; + if ((seconds - rtc_current_time) > ALM1_VALID_RANGE_IN_SEC) + seconds = rtc_current_time - 1; + + ticks = (unsigned long long)seconds << 10; + buff[0] = (ticks >> 16) & 0xff; + buff[1] = (ticks >> 8) & 0xff; + buff[2] = ticks & 0xff; + + ret = tps6586x_writes(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff); + if (ret) + dev_err(dev, "programming alarm failed with err %d\n", ret); + + return ret; +} + +static int tps6586x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long ticks; + unsigned long seconds; + u8 buff[3]; + int ret; + + ret = tps6586x_reads(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff); + if (ret) { + dev_err(dev, "read RTC_ALARM1_HI failed with err %d\n", ret); + return ret; + } + + ticks = (buff[0] << 16) | (buff[1] << 8) | buff[2]; + seconds = ticks >> 10; + seconds += rtc->epoch_start; + + rtc_time_to_tm(seconds, &alrm->time); + return 0; +} + +static const struct rtc_class_ops tps6586x_rtc_ops = { + .read_time = tps6586x_rtc_read_time, + .set_time = tps6586x_rtc_set_time, + .set_alarm = tps6586x_rtc_set_alarm, + .read_alarm = tps6586x_rtc_read_alarm, + .alarm_irq_enable = tps6586x_rtc_alarm_irq_enable, +}; + +static irqreturn_t tps6586x_rtc_irq(int irq, void *data) +{ + struct tps6586x_rtc *rtc = data; + + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF); + return IRQ_HANDLED; +} + +static int tps6586x_rtc_probe(struct platform_device *pdev) +{ + struct device *tps_dev = to_tps6586x_dev(&pdev->dev); + struct tps6586x_rtc *rtc; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->dev = &pdev->dev; + rtc->irq = platform_get_irq(pdev, 0); + + /* Set epoch start as 00:00:00:01:01:2009 */ + rtc->epoch_start = mktime(2009, 1, 1, 0, 0, 0); + + /* 1 kHz tick mode, enable tick counting */ + ret = tps6586x_update(tps_dev, RTC_CTRL, + RTC_ENABLE | OSC_SRC_SEL | + ((TPS6586X_RTC_CL_SEL_1_5PF << CL_SEL_POS) & CL_SEL_MASK), + RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); + if (ret < 0) { + dev_err(&pdev->dev, "unable to start counter\n"); + return ret; + } + + device_init_wakeup(&pdev->dev, 1); + + platform_set_drvdata(pdev, rtc); + rtc->rtc = devm_rtc_device_register(&pdev->dev, dev_name(&pdev->dev), + &tps6586x_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + ret = PTR_ERR(rtc->rtc); + dev_err(&pdev->dev, "RTC device register: ret %d\n", ret); + goto fail_rtc_register; + } + + ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL, + tps6586x_rtc_irq, + IRQF_ONESHOT | IRQF_EARLY_RESUME, + dev_name(&pdev->dev), rtc); + if (ret < 0) { + dev_err(&pdev->dev, "request IRQ(%d) failed with ret %d\n", + rtc->irq, ret); + goto fail_rtc_register; + } + disable_irq(rtc->irq); + return 0; + +fail_rtc_register: + tps6586x_update(tps_dev, RTC_CTRL, 0, + RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); + return ret; +}; + +static int tps6586x_rtc_remove(struct platform_device *pdev) +{ + struct device *tps_dev = to_tps6586x_dev(&pdev->dev); + + tps6586x_update(tps_dev, RTC_CTRL, 0, + RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tps6586x_rtc_suspend(struct device *dev) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(rtc->irq); + return 0; +} + +static int tps6586x_rtc_resume(struct device *dev) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(rtc->irq); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_rtc_suspend, + tps6586x_rtc_resume); + +static struct platform_driver tps6586x_rtc_driver = { + .driver = { + .name = "tps6586x-rtc", + .owner = THIS_MODULE, + .pm = &tps6586x_pm_ops, + }, + .probe = tps6586x_rtc_probe, + .remove = tps6586x_rtc_remove, +}; +module_platform_driver(tps6586x_rtc_driver); + +MODULE_ALIAS("platform:rtc-tps6586x"); +MODULE_DESCRIPTION("TI TPS6586x RTC driver"); +MODULE_AUTHOR("Laxman dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c new file mode 100644 index 00000000000..7af00208d63 --- /dev/null +++ b/drivers/rtc/rtc-tps65910.c @@ -0,0 +1,338 @@ +/* + * rtc-tps65910.c -- TPS65910 Real Time Clock interface + * + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * Author: Venu Byravarasu <vbyravarasu@nvidia.com> + * + * Based on original TI driver rtc-twl.c + * Copyright (C) 2007 MontaVista Software, Inc + * Author: Alexandre Rusev <source@mvista.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/mfd/tps65910.h> + +struct tps65910_rtc { + struct rtc_device *rtc; + int irq; +}; + +/* Total number of RTC registers needed to set time*/ +#define NUM_TIME_REGS (TPS65910_YEARS - TPS65910_SECONDS + 1) + +static int tps65910_rtc_alarm_irq_enable(struct device *dev, unsigned enabled) +{ + struct tps65910 *tps = dev_get_drvdata(dev->parent); + u8 val = 0; + + if (enabled) + val = TPS65910_RTC_INTERRUPTS_IT_ALARM; + + return regmap_write(tps->regmap, TPS65910_RTC_INTERRUPTS, val); +} + +/* + * Gets current tps65910 RTC time and date parameters. + * + * The RTC's time/alarm representation is not what gmtime(3) requires + * Linux to use: + * + * - Months are 1..12 vs Linux 0-11 + * - Years are 0..99 vs Linux 1900..N (we assume 21st century) + */ +static int tps65910_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + unsigned char rtc_data[NUM_TIME_REGS]; + struct tps65910 *tps = dev_get_drvdata(dev->parent); + int ret; + + /* Copy RTC counting registers to static registers or latches */ + ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL, + TPS65910_RTC_CTRL_GET_TIME, TPS65910_RTC_CTRL_GET_TIME); + if (ret < 0) { + dev_err(dev, "RTC CTRL reg update failed with err:%d\n", ret); + return ret; + } + + ret = regmap_bulk_read(tps->regmap, TPS65910_SECONDS, rtc_data, + NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "reading from RTC failed with err:%d\n", ret); + return ret; + } + + tm->tm_sec = bcd2bin(rtc_data[0]); + tm->tm_min = bcd2bin(rtc_data[1]); + tm->tm_hour = bcd2bin(rtc_data[2]); + tm->tm_mday = bcd2bin(rtc_data[3]); + tm->tm_mon = bcd2bin(rtc_data[4]) - 1; + tm->tm_year = bcd2bin(rtc_data[5]) + 100; + + return ret; +} + +static int tps65910_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + unsigned char rtc_data[NUM_TIME_REGS]; + struct tps65910 *tps = dev_get_drvdata(dev->parent); + int ret; + + rtc_data[0] = bin2bcd(tm->tm_sec); + rtc_data[1] = bin2bcd(tm->tm_min); + rtc_data[2] = bin2bcd(tm->tm_hour); + rtc_data[3] = bin2bcd(tm->tm_mday); + rtc_data[4] = bin2bcd(tm->tm_mon + 1); + rtc_data[5] = bin2bcd(tm->tm_year - 100); + + /* Stop RTC while updating the RTC time registers */ + ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL, + TPS65910_RTC_CTRL_STOP_RTC, 0); + if (ret < 0) { + dev_err(dev, "RTC stop failed with err:%d\n", ret); + return ret; + } + + /* update all the time registers in one shot */ + ret = regmap_bulk_write(tps->regmap, TPS65910_SECONDS, rtc_data, + NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "rtc_set_time error %d\n", ret); + return ret; + } + + /* Start back RTC */ + ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL, + TPS65910_RTC_CTRL_STOP_RTC, 1); + if (ret < 0) + dev_err(dev, "RTC start failed with err:%d\n", ret); + + return ret; +} + +/* + * Gets current tps65910 RTC alarm time. + */ +static int tps65910_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + unsigned char alarm_data[NUM_TIME_REGS]; + u32 int_val; + struct tps65910 *tps = dev_get_drvdata(dev->parent); + int ret; + + ret = regmap_bulk_read(tps->regmap, TPS65910_SECONDS, alarm_data, + NUM_TIME_REGS); + if (ret < 0) { + dev_err(dev, "rtc_read_alarm error %d\n", ret); + return ret; + } + + alm->time.tm_sec = bcd2bin(alarm_data[0]); + alm->time.tm_min = bcd2bin(alarm_data[1]); + alm->time.tm_hour = bcd2bin(alarm_data[2]); + alm->time.tm_mday = bcd2bin(alarm_data[3]); + alm->time.tm_mon = bcd2bin(alarm_data[4]) - 1; + alm->time.tm_year = bcd2bin(alarm_data[5]) + 100; + + ret = regmap_read(tps->regmap, TPS65910_RTC_INTERRUPTS, &int_val); + if (ret < 0) + return ret; + + if (int_val & TPS65910_RTC_INTERRUPTS_IT_ALARM) + alm->enabled = 1; + + return ret; +} + +static int tps65910_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + unsigned char alarm_data[NUM_TIME_REGS]; + struct tps65910 *tps = dev_get_drvdata(dev->parent); + int ret; + + ret = tps65910_rtc_alarm_irq_enable(dev, 0); + if (ret) + return ret; + + alarm_data[0] = bin2bcd(alm->time.tm_sec); + alarm_data[1] = bin2bcd(alm->time.tm_min); + alarm_data[2] = bin2bcd(alm->time.tm_hour); + alarm_data[3] = bin2bcd(alm->time.tm_mday); + alarm_data[4] = bin2bcd(alm->time.tm_mon + 1); + alarm_data[5] = bin2bcd(alm->time.tm_year - 100); + + /* update all the alarm registers in one shot */ + ret = regmap_bulk_write(tps->regmap, TPS65910_ALARM_SECONDS, + alarm_data, NUM_TIME_REGS); + if (ret) { + dev_err(dev, "rtc_set_alarm error %d\n", ret); + return ret; + } + + if (alm->enabled) + ret = tps65910_rtc_alarm_irq_enable(dev, 1); + + return ret; +} + +static irqreturn_t tps65910_rtc_interrupt(int irq, void *rtc) +{ + struct device *dev = rtc; + unsigned long events = 0; + struct tps65910 *tps = dev_get_drvdata(dev->parent); + struct tps65910_rtc *tps_rtc = dev_get_drvdata(dev); + int ret; + u32 rtc_reg; + + ret = regmap_read(tps->regmap, TPS65910_RTC_STATUS, &rtc_reg); + if (ret) + return IRQ_NONE; + + if (rtc_reg & TPS65910_RTC_STATUS_ALARM) + events = RTC_IRQF | RTC_AF; + + ret = regmap_write(tps->regmap, TPS65910_RTC_STATUS, rtc_reg); + if (ret) + return IRQ_NONE; + + /* Notify RTC core on event */ + rtc_update_irq(tps_rtc->rtc, 1, events); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops tps65910_rtc_ops = { + .read_time = tps65910_rtc_read_time, + .set_time = tps65910_rtc_set_time, + .read_alarm = tps65910_rtc_read_alarm, + .set_alarm = tps65910_rtc_set_alarm, + .alarm_irq_enable = tps65910_rtc_alarm_irq_enable, +}; + +static int tps65910_rtc_probe(struct platform_device *pdev) +{ + struct tps65910 *tps65910 = NULL; + struct tps65910_rtc *tps_rtc = NULL; + int ret; + int irq; + u32 rtc_reg; + + tps65910 = dev_get_drvdata(pdev->dev.parent); + + tps_rtc = devm_kzalloc(&pdev->dev, sizeof(struct tps65910_rtc), + GFP_KERNEL); + if (!tps_rtc) + return -ENOMEM; + + /* Clear pending interrupts */ + ret = regmap_read(tps65910->regmap, TPS65910_RTC_STATUS, &rtc_reg); + if (ret < 0) + return ret; + + ret = regmap_write(tps65910->regmap, TPS65910_RTC_STATUS, rtc_reg); + if (ret < 0) + return ret; + + dev_dbg(&pdev->dev, "Enabling rtc-tps65910.\n"); + + /* Enable RTC digital power domain */ + ret = regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL, + DEVCTRL_RTC_PWDN_MASK, 0 << DEVCTRL_RTC_PWDN_SHIFT); + if (ret < 0) + return ret; + + rtc_reg = TPS65910_RTC_CTRL_STOP_RTC; + ret = regmap_write(tps65910->regmap, TPS65910_RTC_CTRL, rtc_reg); + if (ret < 0) + return ret; + + irq = platform_get_irq(pdev, 0); + if (irq <= 0) { + dev_warn(&pdev->dev, "Wake up is not possible as irq = %d\n", + irq); + return -ENXIO; + } + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + tps65910_rtc_interrupt, IRQF_TRIGGER_LOW | IRQF_EARLY_RESUME, + dev_name(&pdev->dev), &pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "IRQ is not free.\n"); + return ret; + } + tps_rtc->irq = irq; + device_set_wakeup_capable(&pdev->dev, 1); + + tps_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &tps65910_rtc_ops, THIS_MODULE); + if (IS_ERR(tps_rtc->rtc)) { + ret = PTR_ERR(tps_rtc->rtc); + dev_err(&pdev->dev, "RTC device register: err %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, tps_rtc); + + return 0; +} + +/* + * Disable tps65910 RTC interrupts. + * Sets status flag to free. + */ +static int tps65910_rtc_remove(struct platform_device *pdev) +{ + tps65910_rtc_alarm_irq_enable(&pdev->dev, 0); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tps65910_rtc_suspend(struct device *dev) +{ + struct tps65910_rtc *tps_rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(tps_rtc->irq); + return 0; +} + +static int tps65910_rtc_resume(struct device *dev) +{ + struct tps65910_rtc *tps_rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(tps_rtc->irq); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(tps65910_rtc_pm_ops, tps65910_rtc_suspend, + tps65910_rtc_resume); + +static struct platform_driver tps65910_rtc_driver = { + .probe = tps65910_rtc_probe, + .remove = tps65910_rtc_remove, + .driver = { + .owner = THIS_MODULE, + .name = "tps65910-rtc", + .pm = &tps65910_rtc_pm_ops, + }, +}; + +module_platform_driver(tps65910_rtc_driver); +MODULE_ALIAS("platform:rtc-tps65910"); +MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-tps80031.c b/drivers/rtc/rtc-tps80031.c new file mode 100644 index 00000000000..3e400dce2d0 --- /dev/null +++ b/drivers/rtc/rtc-tps80031.c @@ -0,0 +1,338 @@ +/* + * rtc-tps80031.c -- TI TPS80031/TPS80032 RTC driver + * + * RTC driver for TI TPS80031/TPS80032 Fully Integrated + * Power Management with Power Path and Battery Charger + * + * Copyright (c) 2012, NVIDIA Corporation. + * + * Author: Laxman Dewangan <ldewangan@nvidia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307, USA + */ + +#include <linux/bcd.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mfd/tps80031.h> +#include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/rtc.h> +#include <linux/slab.h> + +#define ENABLE_ALARM_INT 0x08 +#define ALARM_INT_STATUS 0x40 + +/** + * Setting bit to 1 in STOP_RTC will run the RTC and + * setting this bit to 0 will freeze RTC. + */ +#define STOP_RTC 0x1 + +/* Power on reset Values of RTC registers */ +#define TPS80031_RTC_POR_YEAR 0 +#define TPS80031_RTC_POR_MONTH 1 +#define TPS80031_RTC_POR_DAY 1 + +/* Numbers of registers for time and alarms */ +#define TPS80031_RTC_TIME_NUM_REGS 7 +#define TPS80031_RTC_ALARM_NUM_REGS 6 + +/** + * PMU RTC have only 2 nibbles to store year information, so using an + * offset of 100 to set the base year as 2000 for our driver. + */ +#define RTC_YEAR_OFFSET 100 + +struct tps80031_rtc { + struct rtc_device *rtc; + int irq; +}; + +static int tps80031_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + u8 buff[TPS80031_RTC_TIME_NUM_REGS]; + int ret; + + ret = tps80031_reads(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_SECONDS_REG, TPS80031_RTC_TIME_NUM_REGS, buff); + if (ret < 0) { + dev_err(dev, "reading RTC_SECONDS_REG failed, err = %d\n", ret); + return ret; + } + + tm->tm_sec = bcd2bin(buff[0]); + tm->tm_min = bcd2bin(buff[1]); + tm->tm_hour = bcd2bin(buff[2]); + tm->tm_mday = bcd2bin(buff[3]); + tm->tm_mon = bcd2bin(buff[4]) - 1; + tm->tm_year = bcd2bin(buff[5]) + RTC_YEAR_OFFSET; + tm->tm_wday = bcd2bin(buff[6]); + return 0; +} + +static int tps80031_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + u8 buff[7]; + int ret; + + buff[0] = bin2bcd(tm->tm_sec); + buff[1] = bin2bcd(tm->tm_min); + buff[2] = bin2bcd(tm->tm_hour); + buff[3] = bin2bcd(tm->tm_mday); + buff[4] = bin2bcd(tm->tm_mon + 1); + buff[5] = bin2bcd(tm->tm_year % RTC_YEAR_OFFSET); + buff[6] = bin2bcd(tm->tm_wday); + + /* Stop RTC while updating the RTC time registers */ + ret = tps80031_clr_bits(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_CTRL_REG, STOP_RTC); + if (ret < 0) { + dev_err(dev->parent, "Stop RTC failed, err = %d\n", ret); + return ret; + } + + ret = tps80031_writes(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_SECONDS_REG, + TPS80031_RTC_TIME_NUM_REGS, buff); + if (ret < 0) { + dev_err(dev, "writing RTC_SECONDS_REG failed, err %d\n", ret); + return ret; + } + + ret = tps80031_set_bits(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_CTRL_REG, STOP_RTC); + if (ret < 0) + dev_err(dev->parent, "Start RTC failed, err = %d\n", ret); + return ret; +} + +static int tps80031_rtc_alarm_irq_enable(struct device *dev, + unsigned int enable) +{ + int ret; + + if (enable) + ret = tps80031_set_bits(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_INTERRUPTS_REG, ENABLE_ALARM_INT); + else + ret = tps80031_clr_bits(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_INTERRUPTS_REG, ENABLE_ALARM_INT); + if (ret < 0) { + dev_err(dev, "Update on RTC_INT failed, err = %d\n", ret); + return ret; + } + return 0; +} + +static int tps80031_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + u8 buff[TPS80031_RTC_ALARM_NUM_REGS]; + int ret; + + buff[0] = bin2bcd(alrm->time.tm_sec); + buff[1] = bin2bcd(alrm->time.tm_min); + buff[2] = bin2bcd(alrm->time.tm_hour); + buff[3] = bin2bcd(alrm->time.tm_mday); + buff[4] = bin2bcd(alrm->time.tm_mon + 1); + buff[5] = bin2bcd(alrm->time.tm_year % RTC_YEAR_OFFSET); + ret = tps80031_writes(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_ALARM_SECONDS_REG, + TPS80031_RTC_ALARM_NUM_REGS, buff); + if (ret < 0) { + dev_err(dev, "Writing RTC_ALARM failed, err %d\n", ret); + return ret; + } + return tps80031_rtc_alarm_irq_enable(dev, alrm->enabled); +} + +static int tps80031_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + u8 buff[6]; + int ret; + + ret = tps80031_reads(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_ALARM_SECONDS_REG, + TPS80031_RTC_ALARM_NUM_REGS, buff); + if (ret < 0) { + dev_err(dev->parent, + "reading RTC_ALARM failed, err = %d\n", ret); + return ret; + } + + alrm->time.tm_sec = bcd2bin(buff[0]); + alrm->time.tm_min = bcd2bin(buff[1]); + alrm->time.tm_hour = bcd2bin(buff[2]); + alrm->time.tm_mday = bcd2bin(buff[3]); + alrm->time.tm_mon = bcd2bin(buff[4]) - 1; + alrm->time.tm_year = bcd2bin(buff[5]) + RTC_YEAR_OFFSET; + return 0; +} + +static int clear_alarm_int_status(struct device *dev, struct tps80031_rtc *rtc) +{ + int ret; + u8 buf; + + /** + * As per datasheet, A dummy read of this RTC_STATUS_REG register + * is necessary before each I2C read in order to update the status + * register value. + */ + ret = tps80031_read(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_STATUS_REG, &buf); + if (ret < 0) { + dev_err(dev, "reading RTC_STATUS failed. err = %d\n", ret); + return ret; + } + + /* clear Alarm status bits.*/ + ret = tps80031_set_bits(dev->parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_STATUS_REG, ALARM_INT_STATUS); + if (ret < 0) { + dev_err(dev, "clear Alarm INT failed, err = %d\n", ret); + return ret; + } + return 0; +} + +static irqreturn_t tps80031_rtc_irq(int irq, void *data) +{ + struct device *dev = data; + struct tps80031_rtc *rtc = dev_get_drvdata(dev); + int ret; + + ret = clear_alarm_int_status(dev, rtc); + if (ret < 0) + return ret; + + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF); + return IRQ_HANDLED; +} + +static const struct rtc_class_ops tps80031_rtc_ops = { + .read_time = tps80031_rtc_read_time, + .set_time = tps80031_rtc_set_time, + .set_alarm = tps80031_rtc_set_alarm, + .read_alarm = tps80031_rtc_read_alarm, + .alarm_irq_enable = tps80031_rtc_alarm_irq_enable, +}; + +static int tps80031_rtc_probe(struct platform_device *pdev) +{ + struct tps80031_rtc *rtc; + struct rtc_time tm; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->irq = platform_get_irq(pdev, 0); + platform_set_drvdata(pdev, rtc); + + /* Start RTC */ + ret = tps80031_set_bits(pdev->dev.parent, TPS80031_SLAVE_ID1, + TPS80031_RTC_CTRL_REG, STOP_RTC); + if (ret < 0) { + dev_err(&pdev->dev, "failed to start RTC. err = %d\n", ret); + return ret; + } + + /* If RTC have POR values, set time 01:01:2000 */ + tps80031_rtc_read_time(&pdev->dev, &tm); + if ((tm.tm_year == RTC_YEAR_OFFSET + TPS80031_RTC_POR_YEAR) && + (tm.tm_mon == (TPS80031_RTC_POR_MONTH - 1)) && + (tm.tm_mday == TPS80031_RTC_POR_DAY)) { + tm.tm_year = 2000; + tm.tm_mday = 1; + tm.tm_mon = 1; + ret = tps80031_rtc_set_time(&pdev->dev, &tm); + if (ret < 0) { + dev_err(&pdev->dev, + "RTC set time failed, err = %d\n", ret); + return ret; + } + } + + /* Clear alarm intretupt status if it is there */ + ret = clear_alarm_int_status(&pdev->dev, rtc); + if (ret < 0) { + dev_err(&pdev->dev, "Clear alarm int failed, err = %d\n", ret); + return ret; + } + + rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &tps80031_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + ret = PTR_ERR(rtc->rtc); + dev_err(&pdev->dev, "RTC registration failed, err %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL, + tps80031_rtc_irq, + IRQF_ONESHOT | IRQF_EARLY_RESUME, + dev_name(&pdev->dev), rtc); + if (ret < 0) { + dev_err(&pdev->dev, "request IRQ:%d failed, err = %d\n", + rtc->irq, ret); + return ret; + } + device_set_wakeup_capable(&pdev->dev, 1); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tps80031_rtc_suspend(struct device *dev) +{ + struct tps80031_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(rtc->irq); + return 0; +} + +static int tps80031_rtc_resume(struct device *dev) +{ + struct tps80031_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(rtc->irq); + return 0; +}; +#endif + +static SIMPLE_DEV_PM_OPS(tps80031_pm_ops, tps80031_rtc_suspend, + tps80031_rtc_resume); + +static struct platform_driver tps80031_rtc_driver = { + .driver = { + .name = "tps80031-rtc", + .owner = THIS_MODULE, + .pm = &tps80031_pm_ops, + }, + .probe = tps80031_rtc_probe, +}; + +module_platform_driver(tps80031_rtc_driver); + +MODULE_ALIAS("platform:tps80031-rtc"); +MODULE_DESCRIPTION("TI TPS80031/TPS80032 RTC driver"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index ed1b8682812..1915464e4cd 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -27,6 +27,7 @@ #include <linux/bcd.h> #include <linux/platform_device.h> #include <linux/interrupt.h> +#include <linux/of.h> #include <linux/i2c/twl.h> @@ -112,6 +113,7 @@ static const u8 twl6030_rtc_reg_map[] = { #define BIT_RTC_CTRL_REG_TEST_MODE_M 0x10 #define BIT_RTC_CTRL_REG_SET_32_COUNTER_M 0x20 #define BIT_RTC_CTRL_REG_GET_TIME_M 0x40 +#define BIT_RTC_CTRL_REG_RTC_V_OPT 0x80 /* RTC_STATUS_REG bitfields */ #define BIT_RTC_STATUS_REG_RUN_M 0x02 @@ -176,6 +178,10 @@ static int set_rtc_irq_bit(unsigned char bit) unsigned char val; int ret; + /* if the bit is set, return from here */ + if (rtc_irq_bits & bit) + return 0; + val = rtc_irq_bits | bit; val &= ~BIT_RTC_INTERRUPTS_REG_EVERY_M; ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); @@ -193,6 +199,10 @@ static int mask_rtc_irq_bit(unsigned char bit) unsigned char val; int ret; + /* if the bit is clear, return from here */ + if (!(rtc_irq_bits & bit)) + return 0; + val = rtc_irq_bits & ~bit; ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); if (ret == 0) @@ -203,24 +213,24 @@ static int mask_rtc_irq_bit(unsigned char bit) static int twl_rtc_alarm_irq_enable(struct device *dev, unsigned enabled) { + struct platform_device *pdev = to_platform_device(dev); + int irq = platform_get_irq(pdev, 0); + static bool twl_rtc_wake_enabled; int ret; - if (enabled) + if (enabled) { ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); - else + if (device_can_wakeup(dev) && !twl_rtc_wake_enabled) { + enable_irq_wake(irq); + twl_rtc_wake_enabled = true; + } + } else { ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); - - return ret; -} - -static int twl_rtc_update_irq_enable(struct device *dev, unsigned enabled) -{ - int ret; - - if (enabled) - ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); - else - ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); + if (twl_rtc_wake_enabled) { + disable_irq_wake(irq); + twl_rtc_wake_enabled = false; + } + } return ret; } @@ -236,28 +246,60 @@ static int twl_rtc_update_irq_enable(struct device *dev, unsigned enabled) */ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm) { - unsigned char rtc_data[ALL_TIME_REGS + 1]; + unsigned char rtc_data[ALL_TIME_REGS]; int ret; u8 save_control; + u8 rtc_control; ret = twl_rtc_read_u8(&save_control, REG_RTC_CTRL_REG); - if (ret < 0) + if (ret < 0) { + dev_err(dev, "%s: reading CTRL_REG, error %d\n", __func__, ret); return ret; + } + /* for twl6030/32 make sure BIT_RTC_CTRL_REG_GET_TIME_M is clear */ + if (twl_class_is_6030()) { + if (save_control & BIT_RTC_CTRL_REG_GET_TIME_M) { + save_control &= ~BIT_RTC_CTRL_REG_GET_TIME_M; + ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); + if (ret < 0) { + dev_err(dev, "%s clr GET_TIME, error %d\n", + __func__, ret); + return ret; + } + } + } - save_control |= BIT_RTC_CTRL_REG_GET_TIME_M; + /* Copy RTC counting registers to static registers or latches */ + rtc_control = save_control | BIT_RTC_CTRL_REG_GET_TIME_M; - ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); - if (ret < 0) + /* for twl6030/32 enable read access to static shadowed registers */ + if (twl_class_is_6030()) + rtc_control |= BIT_RTC_CTRL_REG_RTC_V_OPT; + + ret = twl_rtc_write_u8(rtc_control, REG_RTC_CTRL_REG); + if (ret < 0) { + dev_err(dev, "%s: writing CTRL_REG, error %d\n", __func__, ret); return ret; + } ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data, (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS); if (ret < 0) { - dev_err(dev, "rtc_read_time error %d\n", ret); + dev_err(dev, "%s: reading data, error %d\n", __func__, ret); return ret; } + /* for twl6030 restore original state of rtc control register */ + if (twl_class_is_6030()) { + ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); + if (ret < 0) { + dev_err(dev, "%s: restore CTRL_REG, error %d\n", + __func__, ret); + return ret; + } + } + tm->tm_sec = bcd2bin(rtc_data[0]); tm->tm_min = bcd2bin(rtc_data[1]); tm->tm_hour = bcd2bin(rtc_data[2]); @@ -271,15 +313,15 @@ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm) static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm) { unsigned char save_control; - unsigned char rtc_data[ALL_TIME_REGS + 1]; + unsigned char rtc_data[ALL_TIME_REGS]; int ret; - rtc_data[1] = bin2bcd(tm->tm_sec); - rtc_data[2] = bin2bcd(tm->tm_min); - rtc_data[3] = bin2bcd(tm->tm_hour); - rtc_data[4] = bin2bcd(tm->tm_mday); - rtc_data[5] = bin2bcd(tm->tm_mon + 1); - rtc_data[6] = bin2bcd(tm->tm_year - 100); + rtc_data[0] = bin2bcd(tm->tm_sec); + rtc_data[1] = bin2bcd(tm->tm_min); + rtc_data[2] = bin2bcd(tm->tm_hour); + rtc_data[3] = bin2bcd(tm->tm_mday); + rtc_data[4] = bin2bcd(tm->tm_mon + 1); + rtc_data[5] = bin2bcd(tm->tm_year - 100); /* Stop RTC while updating the TC registers */ ret = twl_rtc_read_u8(&save_control, REG_RTC_CTRL_REG); @@ -287,7 +329,7 @@ static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm) goto out; save_control &= ~BIT_RTC_CTRL_REG_STOP_RTC_M; - twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); + ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); if (ret < 0) goto out; @@ -312,7 +354,7 @@ out: */ static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { - unsigned char rtc_data[ALL_TIME_REGS + 1]; + unsigned char rtc_data[ALL_TIME_REGS]; int ret; ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data, @@ -339,19 +381,19 @@ static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) static int twl_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) { - unsigned char alarm_data[ALL_TIME_REGS + 1]; + unsigned char alarm_data[ALL_TIME_REGS]; int ret; ret = twl_rtc_alarm_irq_enable(dev, 0); if (ret) goto out; - alarm_data[1] = bin2bcd(alm->time.tm_sec); - alarm_data[2] = bin2bcd(alm->time.tm_min); - alarm_data[3] = bin2bcd(alm->time.tm_hour); - alarm_data[4] = bin2bcd(alm->time.tm_mday); - alarm_data[5] = bin2bcd(alm->time.tm_mon + 1); - alarm_data[6] = bin2bcd(alm->time.tm_year - 100); + alarm_data[0] = bin2bcd(alm->time.tm_sec); + alarm_data[1] = bin2bcd(alm->time.tm_min); + alarm_data[2] = bin2bcd(alm->time.tm_hour); + alarm_data[3] = bin2bcd(alm->time.tm_mday); + alarm_data[4] = bin2bcd(alm->time.tm_mon + 1); + alarm_data[5] = bin2bcd(alm->time.tm_year - 100); /* update all the alarm registers in one shot */ ret = twl_i2c_write(TWL_MODULE_RTC, alarm_data, @@ -369,19 +411,11 @@ out: static irqreturn_t twl_rtc_interrupt(int irq, void *rtc) { - unsigned long events = 0; + unsigned long events; int ret = IRQ_NONE; int res; u8 rd_reg; -#ifdef CONFIG_LOCKDEP - /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which - * we don't want and can't tolerate. Although it might be - * friendlier not to borrow this thread context... - */ - local_irq_enable(); -#endif - res = twl_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG); if (res) goto out; @@ -392,11 +426,11 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc) * by reading RTS_INTERRUPTS_REGISTER[IT_TIMER,IT_ALARM] */ if (rd_reg & BIT_RTC_STATUS_REG_ALARM_M) - events |= RTC_IRQF | RTC_AF; + events = RTC_IRQF | RTC_AF; else - events |= RTC_IRQF | RTC_UF; + events = RTC_IRQF | RTC_PF; - res = twl_rtc_write_u8(rd_reg | BIT_RTC_STATUS_REG_ALARM_M, + res = twl_rtc_write_u8(BIT_RTC_STATUS_REG_ALARM_M, REG_RTC_STATUS_REG); if (res) goto out; @@ -433,36 +467,29 @@ static struct rtc_class_ops twl_rtc_ops = { .read_alarm = twl_rtc_read_alarm, .set_alarm = twl_rtc_set_alarm, .alarm_irq_enable = twl_rtc_alarm_irq_enable, - .update_irq_enable = twl_rtc_update_irq_enable, }; /*----------------------------------------------------------------------*/ -static int __devinit twl_rtc_probe(struct platform_device *pdev) +static int twl_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; - int ret = 0; + int ret = -EINVAL; int irq = platform_get_irq(pdev, 0); u8 rd_reg; if (irq <= 0) - return -EINVAL; - - rtc = rtc_device_register(pdev->name, - &pdev->dev, &twl_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - ret = PTR_ERR(rtc); - dev_err(&pdev->dev, "can't register RTC device, err %ld\n", - PTR_ERR(rtc)); - goto out0; - - } + return ret; - platform_set_drvdata(pdev, rtc); + /* Initialize the register map */ + if (twl_class_is_4030()) + rtc_reg_map = (u8 *)twl4030_rtc_reg_map; + else + rtc_reg_map = (u8 *)twl6030_rtc_reg_map; ret = twl_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG); if (ret < 0) - goto out1; + return ret; if (rd_reg & BIT_RTC_STATUS_REG_POWER_UP_M) dev_warn(&pdev->dev, "Power up reset detected.\n"); @@ -473,15 +500,7 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev) /* Clear RTC Power up reset and pending alarm interrupts */ ret = twl_rtc_write_u8(rd_reg, REG_RTC_STATUS_REG); if (ret < 0) - goto out1; - - ret = request_irq(irq, twl_rtc_interrupt, - IRQF_TRIGGER_RISING, - dev_name(&rtc->dev), rtc); - if (ret < 0) { - dev_err(&pdev->dev, "IRQ is not free.\n"); - goto out1; - } + return ret; if (twl_class_is_6030()) { twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK, @@ -490,44 +509,51 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev) REG_INT_MSK_STS_A); } - /* Check RTC module status, Enable if it is off */ - ret = twl_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG); + dev_info(&pdev->dev, "Enabling TWL-RTC\n"); + ret = twl_rtc_write_u8(BIT_RTC_CTRL_REG_STOP_RTC_M, REG_RTC_CTRL_REG); if (ret < 0) - goto out2; - - if (!(rd_reg & BIT_RTC_CTRL_REG_STOP_RTC_M)) { - dev_info(&pdev->dev, "Enabling TWL-RTC.\n"); - rd_reg = BIT_RTC_CTRL_REG_STOP_RTC_M; - ret = twl_rtc_write_u8(rd_reg, REG_RTC_CTRL_REG); - if (ret < 0) - goto out2; - } + return ret; + + /* ensure interrupts are disabled, bootloaders can be strange */ + ret = twl_rtc_write_u8(0, REG_RTC_INTERRUPTS_REG); + if (ret < 0) + dev_warn(&pdev->dev, "unable to disable interrupt\n"); /* init cached IRQ enable bits */ ret = twl_rtc_read_u8(&rtc_irq_bits, REG_RTC_INTERRUPTS_REG); if (ret < 0) - goto out2; + return ret; - return ret; + device_init_wakeup(&pdev->dev, 1); -out2: - free_irq(irq, rtc); -out1: - rtc_device_unregister(rtc); -out0: - return ret; + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &twl_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) { + dev_err(&pdev->dev, "can't register RTC device, err %ld\n", + PTR_ERR(rtc)); + return PTR_ERR(rtc); + } + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + twl_rtc_interrupt, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev_name(&rtc->dev), rtc); + if (ret < 0) { + dev_err(&pdev->dev, "IRQ is not free.\n"); + return ret; + } + + platform_set_drvdata(pdev, rtc); + return 0; } /* * Disable all TWL RTC module interrupts. * Sets status flag to free. */ -static int __devexit twl_rtc_remove(struct platform_device *pdev) +static int twl_rtc_remove(struct platform_device *pdev) { /* leave rtc running, but disable irqs */ - struct rtc_device *rtc = platform_get_drvdata(pdev); - int irq = platform_get_irq(pdev, 0); - mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); if (twl_class_is_6030()) { @@ -537,11 +563,6 @@ static int __devexit twl_rtc_remove(struct platform_device *pdev) REG_INT_MSK_STS_A); } - - free_irq(irq, rtc); - - rtc_device_unregister(rtc); - platform_set_drvdata(pdev, NULL); return 0; } @@ -552,11 +573,10 @@ static void twl_rtc_shutdown(struct platform_device *pdev) mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); } -#ifdef CONFIG_PM - +#ifdef CONFIG_PM_SLEEP static unsigned char irqstat; -static int twl_rtc_suspend(struct platform_device *pdev, pm_message_t state) +static int twl_rtc_suspend(struct device *dev) { irqstat = rtc_irq_bits; @@ -564,47 +584,38 @@ static int twl_rtc_suspend(struct platform_device *pdev, pm_message_t state) return 0; } -static int twl_rtc_resume(struct platform_device *pdev) +static int twl_rtc_resume(struct device *dev) { set_rtc_irq_bit(irqstat); return 0; } +#endif -#else -#define twl_rtc_suspend NULL -#define twl_rtc_resume NULL +static SIMPLE_DEV_PM_OPS(twl_rtc_pm_ops, twl_rtc_suspend, twl_rtc_resume); + +#ifdef CONFIG_OF +static const struct of_device_id twl_rtc_of_match[] = { + {.compatible = "ti,twl4030-rtc", }, + { }, +}; +MODULE_DEVICE_TABLE(of, twl_rtc_of_match); #endif MODULE_ALIAS("platform:twl_rtc"); static struct platform_driver twl4030rtc_driver = { .probe = twl_rtc_probe, - .remove = __devexit_p(twl_rtc_remove), + .remove = twl_rtc_remove, .shutdown = twl_rtc_shutdown, - .suspend = twl_rtc_suspend, - .resume = twl_rtc_resume, .driver = { - .owner = THIS_MODULE, - .name = "twl_rtc", + .owner = THIS_MODULE, + .name = "twl_rtc", + .pm = &twl_rtc_pm_ops, + .of_match_table = of_match_ptr(twl_rtc_of_match), }, }; -static int __init twl_rtc_init(void) -{ - if (twl_class_is_4030()) - rtc_reg_map = (u8 *) twl4030_rtc_reg_map; - else - rtc_reg_map = (u8 *) twl6030_rtc_reg_map; - - return platform_driver_register(&twl4030rtc_driver); -} -module_init(twl_rtc_init); - -static void __exit twl_rtc_exit(void) -{ - platform_driver_unregister(&twl4030rtc_driver); -} -module_exit(twl_rtc_exit); +module_platform_driver(twl4030rtc_driver); MODULE_AUTHOR("Texas Instruments, MontaVista Software"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c index ec6313d1535..2e678c681b1 100644 --- a/drivers/rtc/rtc-tx4939.c +++ b/drivers/rtc/rtc-tx4939.c @@ -11,6 +11,7 @@ #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/interrupt.h> +#include <linux/module.h> #include <linux/io.h> #include <linux/gfp.h> #include <asm/txx9/tx4939.h> @@ -175,8 +176,8 @@ static irqreturn_t tx4939_rtc_interrupt(int irq, void *dev_id) tx4939_rtc_cmd(rtcreg, TX4939_RTCCTL_COMMAND_NOP); } spin_unlock(&pdata->lock); - if (likely(pdata->rtc)) - rtc_update_irq(pdata->rtc, 1, events); + rtc_update_irq(pdata->rtc, 1, events); + return IRQ_HANDLED; } @@ -243,9 +244,6 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev) struct resource *res; int irq, ret; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; irq = platform_get_irq(pdev, 0); if (irq < 0) return -ENODEV; @@ -254,27 +252,23 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev) return -ENOMEM; platform_set_drvdata(pdev, pdata); - if (!devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), pdev->name)) - return -EBUSY; - pdata->rtcreg = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); - if (!pdata->rtcreg) - return -EBUSY; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pdata->rtcreg = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pdata->rtcreg)) + return PTR_ERR(pdata->rtcreg); spin_lock_init(&pdata->lock); tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP); if (devm_request_irq(&pdev->dev, irq, tx4939_rtc_interrupt, - IRQF_DISABLED, pdev->name, &pdev->dev) < 0) + 0, pdev->name, &pdev->dev) < 0) return -EBUSY; - rtc = rtc_device_register(pdev->name, &pdev->dev, + rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &tx4939_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); pdata->rtc = rtc; ret = sysfs_create_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr); - if (ret) - rtc_device_unregister(rtc); + return ret; } @@ -283,7 +277,6 @@ static int __exit tx4939_rtc_remove(struct platform_device *pdev) struct tx4939rtc_plat_data *pdata = platform_get_drvdata(pdev); sysfs_remove_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr); - rtc_device_unregister(pdata->rtc); spin_lock_irq(&pdata->lock); tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP); spin_unlock_irq(&pdata->lock); @@ -298,18 +291,7 @@ static struct platform_driver tx4939_rtc_driver = { }, }; -static int __init tx4939rtc_init(void) -{ - return platform_driver_probe(&tx4939_rtc_driver, tx4939_rtc_probe); -} - -static void __exit tx4939rtc_exit(void) -{ - platform_driver_unregister(&tx4939_rtc_driver); -} - -module_init(tx4939rtc_init); -module_exit(tx4939rtc_exit); +module_platform_driver_probe(tx4939_rtc_driver, tx4939_rtc_probe); MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>"); MODULE_DESCRIPTION("TX4939 internal RTC driver"); diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c index f71c3ce1803..25222cdccdc 100644 --- a/drivers/rtc/rtc-v3020.c +++ b/drivers/rtc/rtc-v3020.c @@ -16,7 +16,7 @@ * - Use the generic rtc class * * ??-???-2004: Someone at Compulab - * - Initial driver creation. + * - Initial driver creation. * */ #include <linux/platform_device.h> @@ -278,13 +278,13 @@ static int v3020_set_time(struct device *dev, struct rtc_time *dt) dev_dbg(dev, "tm_year: %i\n", dt->tm_year); /* Write all the values to ram... */ - v3020_set_reg(chip, V3020_SECONDS, bin2bcd(dt->tm_sec)); - v3020_set_reg(chip, V3020_MINUTES, bin2bcd(dt->tm_min)); - v3020_set_reg(chip, V3020_HOURS, bin2bcd(dt->tm_hour)); + v3020_set_reg(chip, V3020_SECONDS, bin2bcd(dt->tm_sec)); + v3020_set_reg(chip, V3020_MINUTES, bin2bcd(dt->tm_min)); + v3020_set_reg(chip, V3020_HOURS, bin2bcd(dt->tm_hour)); v3020_set_reg(chip, V3020_MONTH_DAY, bin2bcd(dt->tm_mday)); - v3020_set_reg(chip, V3020_MONTH, bin2bcd(dt->tm_mon + 1)); - v3020_set_reg(chip, V3020_WEEK_DAY, bin2bcd(dt->tm_wday)); - v3020_set_reg(chip, V3020_YEAR, bin2bcd(dt->tm_year % 100)); + v3020_set_reg(chip, V3020_MONTH, bin2bcd(dt->tm_mon + 1)); + v3020_set_reg(chip, V3020_WEEK_DAY, bin2bcd(dt->tm_wday)); + v3020_set_reg(chip, V3020_YEAR, bin2bcd(dt->tm_year % 100)); /* ...and set the clock. */ v3020_set_reg(chip, V3020_CMD_RAM2CLOCK, 0); @@ -303,13 +303,13 @@ static const struct rtc_class_ops v3020_rtc_ops = { static int rtc_probe(struct platform_device *pdev) { - struct v3020_platform_data *pdata = pdev->dev.platform_data; + struct v3020_platform_data *pdata = dev_get_platdata(&pdev->dev); struct v3020 *chip; int retval = -EBUSY; int i; int temp; - chip = kzalloc(sizeof *chip, GFP_KERNEL); + chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; @@ -320,7 +320,7 @@ static int rtc_probe(struct platform_device *pdev) retval = chip->ops->map_io(chip, pdev, pdata); if (retval) - goto err_chip; + return retval; /* Make sure the v3020 expects a communication cycle * by reading 8 times */ @@ -353,8 +353,8 @@ static int rtc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, chip); - chip->rtc = rtc_device_register("v3020", - &pdev->dev, &v3020_rtc_ops, THIS_MODULE); + chip->rtc = devm_rtc_device_register(&pdev->dev, "v3020", + &v3020_rtc_ops, THIS_MODULE); if (IS_ERR(chip->rtc)) { retval = PTR_ERR(chip->rtc); goto err_io; @@ -364,8 +364,6 @@ static int rtc_probe(struct platform_device *pdev) err_io: chip->ops->unmap_io(chip); -err_chip: - kfree(chip); return retval; } @@ -373,13 +371,8 @@ err_chip: static int rtc_remove(struct platform_device *dev) { struct v3020 *chip = platform_get_drvdata(dev); - struct rtc_device *rtc = chip->rtc; - - if (rtc) - rtc_device_unregister(rtc); chip->ops->unmap_io(chip); - kfree(chip); return 0; } @@ -393,18 +386,7 @@ static struct platform_driver rtc_device_driver = { }, }; -static __init int v3020_init(void) -{ - return platform_driver_register(&rtc_device_driver); -} - -static __exit void v3020_exit(void) -{ - platform_driver_unregister(&rtc_device_driver); -} - -module_init(v3020_init); -module_exit(v3020_exit); +module_platform_driver(rtc_device_driver); MODULE_DESCRIPTION("V3020 RTC"); MODULE_AUTHOR("Raphael Assenat"); diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c index c3244244e8c..88c9c92e89f 100644 --- a/drivers/rtc/rtc-vr41xx.c +++ b/drivers/rtc/rtc-vr41xx.c @@ -20,6 +20,7 @@ #include <linux/err.h> #include <linux/fs.h> #include <linux/init.h> +#include <linux/io.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/module.h> @@ -27,11 +28,10 @@ #include <linux/rtc.h> #include <linux/spinlock.h> #include <linux/types.h> +#include <linux/uaccess.h> #include <linux/log2.h> #include <asm/div64.h> -#include <asm/io.h> -#include <asm/uaccess.h> MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>"); MODULE_DESCRIPTION("NEC VR4100 series RTC driver"); @@ -103,7 +103,7 @@ static inline unsigned long read_elapsed_second(void) second_mid = rtc1_read(ETIMEMREG); second_high = rtc1_read(ETIMEHREG); } while (first_low != second_low || first_mid != second_mid || - first_high != second_high); + first_high != second_high); return (first_high << 17) | (first_mid << 1) | (first_low >> 15); } @@ -154,7 +154,7 @@ static int vr41xx_rtc_set_time(struct device *dev, struct rtc_time *time) epoch_sec = mktime(epoch, 1, 1, 0, 0, 0); current_sec = mktime(time->tm_year + 1900, time->tm_mon + 1, time->tm_mday, - time->tm_hour, time->tm_min, time->tm_sec); + time->tm_hour, time->tm_min, time->tm_sec); write_elapsed_second(current_sec - epoch_sec); @@ -186,7 +186,7 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) struct rtc_time *time = &wkalrm->time; alarm_sec = mktime(time->tm_year + 1900, time->tm_mon + 1, time->tm_mday, - time->tm_hour, time->tm_min, time->tm_sec); + time->tm_hour, time->tm_min, time->tm_sec); spin_lock_irq(&rtc_lock); @@ -207,59 +207,9 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) return 0; } -static int vr41xx_rtc_irq_set_freq(struct device *dev, int freq) -{ - u64 count; - - if (!is_power_of_2(freq)) - return -EINVAL; - count = RTC_FREQUENCY; - do_div(count, freq); - - spin_lock_irq(&rtc_lock); - - periodic_count = count; - rtc1_write(RTCL1LREG, periodic_count); - rtc1_write(RTCL1HREG, periodic_count >> 16); - - spin_unlock_irq(&rtc_lock); - - return 0; -} - -static int vr41xx_rtc_irq_set_state(struct device *dev, int enabled) -{ - if (enabled) - enable_irq(pie_irq); - else - disable_irq(pie_irq); - - return 0; -} - static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) { switch (cmd) { - case RTC_AIE_ON: - spin_lock_irq(&rtc_lock); - - if (!alarm_enabled) { - enable_irq(aie_irq); - alarm_enabled = 1; - } - - spin_unlock_irq(&rtc_lock); - break; - case RTC_AIE_OFF: - spin_lock_irq(&rtc_lock); - - if (alarm_enabled) { - disable_irq(aie_irq); - alarm_enabled = 0; - } - - spin_unlock_irq(&rtc_lock); - break; case RTC_EPOCH_READ: return put_user(epoch, (unsigned long __user *)arg); case RTC_EPOCH_SET: @@ -275,6 +225,24 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long return 0; } +static int vr41xx_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + spin_lock_irq(&rtc_lock); + if (enabled) { + if (!alarm_enabled) { + enable_irq(aie_irq); + alarm_enabled = 1; + } + } else { + if (alarm_enabled) { + disable_irq(aie_irq); + alarm_enabled = 0; + } + } + spin_unlock_irq(&rtc_lock); + return 0; +} + static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id) { struct platform_device *pdev = (struct platform_device *)dev_id; @@ -310,11 +278,9 @@ static const struct rtc_class_ops vr41xx_rtc_ops = { .set_time = vr41xx_rtc_set_time, .read_alarm = vr41xx_rtc_read_alarm, .set_alarm = vr41xx_rtc_set_alarm, - .irq_set_freq = vr41xx_rtc_irq_set_freq, - .irq_set_state = vr41xx_rtc_irq_set_state, }; -static int __devinit rtc_probe(struct platform_device *pdev) +static int rtc_probe(struct platform_device *pdev) { struct resource *res; struct rtc_device *rtc; @@ -327,7 +293,7 @@ static int __devinit rtc_probe(struct platform_device *pdev) if (!res) return -EBUSY; - rtc1_base = ioremap(res->start, resource_size(res)); + rtc1_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!rtc1_base) return -EBUSY; @@ -337,13 +303,14 @@ static int __devinit rtc_probe(struct platform_device *pdev) goto err_rtc1_iounmap; } - rtc2_base = ioremap(res->start, resource_size(res)); + rtc2_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!rtc2_base) { retval = -EBUSY; goto err_rtc1_iounmap; } - rtc = rtc_device_register(rtc_name, &pdev->dev, &vr41xx_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&pdev->dev, rtc_name, &vr41xx_rtc_ops, + THIS_MODULE); if (IS_ERR(rtc)) { retval = PTR_ERR(rtc); goto err_iounmap_all; @@ -364,90 +331,52 @@ static int __devinit rtc_probe(struct platform_device *pdev) aie_irq = platform_get_irq(pdev, 0); if (aie_irq <= 0) { retval = -EBUSY; - goto err_device_unregister; + goto err_iounmap_all; } - retval = request_irq(aie_irq, elapsedtime_interrupt, IRQF_DISABLED, - "elapsed_time", pdev); + retval = devm_request_irq(&pdev->dev, aie_irq, elapsedtime_interrupt, 0, + "elapsed_time", pdev); if (retval < 0) - goto err_device_unregister; + goto err_iounmap_all; pie_irq = platform_get_irq(pdev, 1); - if (pie_irq <= 0) - goto err_free_irq; + if (pie_irq <= 0) { + retval = -EBUSY; + goto err_iounmap_all; + } - retval = request_irq(pie_irq, rtclong1_interrupt, IRQF_DISABLED, - "rtclong1", pdev); + retval = devm_request_irq(&pdev->dev, pie_irq, rtclong1_interrupt, 0, + "rtclong1", pdev); if (retval < 0) - goto err_free_irq; + goto err_iounmap_all; platform_set_drvdata(pdev, rtc); disable_irq(aie_irq); disable_irq(pie_irq); - printk(KERN_INFO "rtc: Real Time Clock of NEC VR4100 series\n"); + dev_info(&pdev->dev, "Real Time Clock of NEC VR4100 series\n"); return 0; -err_free_irq: - free_irq(aie_irq, pdev); - -err_device_unregister: - rtc_device_unregister(rtc); - err_iounmap_all: - iounmap(rtc2_base); rtc2_base = NULL; err_rtc1_iounmap: - iounmap(rtc1_base); rtc1_base = NULL; return retval; } -static int __devexit rtc_remove(struct platform_device *pdev) -{ - struct rtc_device *rtc; - - rtc = platform_get_drvdata(pdev); - if (rtc) - rtc_device_unregister(rtc); - - platform_set_drvdata(pdev, NULL); - - free_irq(aie_irq, pdev); - free_irq(pie_irq, pdev); - if (rtc1_base) - iounmap(rtc1_base); - if (rtc2_base) - iounmap(rtc2_base); - - return 0; -} - /* work with hotplug and coldplug */ MODULE_ALIAS("platform:RTC"); static struct platform_driver rtc_platform_driver = { .probe = rtc_probe, - .remove = __devexit_p(rtc_remove), .driver = { .name = rtc_name, .owner = THIS_MODULE, }, }; -static int __init vr41xx_rtc_init(void) -{ - return platform_driver_register(&rtc_platform_driver); -} - -static void __exit vr41xx_rtc_exit(void) -{ - platform_driver_unregister(&rtc_platform_driver); -} - -module_init(vr41xx_rtc_init); -module_exit(vr41xx_rtc_exit); +module_platform_driver(rtc_platform_driver); diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c new file mode 100644 index 00000000000..051da968da6 --- /dev/null +++ b/drivers/rtc/rtc-vt8500.c @@ -0,0 +1,290 @@ +/* + * drivers/rtc/rtc-vt8500.c + * + * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> + * + * Based on rtc-pxa.c + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/rtc.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/bcd.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/of.h> + +/* + * Register definitions + */ +#define VT8500_RTC_TS 0x00 /* Time set */ +#define VT8500_RTC_DS 0x04 /* Date set */ +#define VT8500_RTC_AS 0x08 /* Alarm set */ +#define VT8500_RTC_CR 0x0c /* Control */ +#define VT8500_RTC_TR 0x10 /* Time read */ +#define VT8500_RTC_DR 0x14 /* Date read */ +#define VT8500_RTC_WS 0x18 /* Write status */ +#define VT8500_RTC_CL 0x20 /* Calibration */ +#define VT8500_RTC_IS 0x24 /* Interrupt status */ +#define VT8500_RTC_ST 0x28 /* Status */ + +#define INVALID_TIME_BIT (1 << 31) + +#define DATE_CENTURY_S 19 +#define DATE_YEAR_S 11 +#define DATE_YEAR_MASK (0xff << DATE_YEAR_S) +#define DATE_MONTH_S 6 +#define DATE_MONTH_MASK (0x1f << DATE_MONTH_S) +#define DATE_DAY_MASK 0x3f + +#define TIME_DOW_S 20 +#define TIME_DOW_MASK (0x07 << TIME_DOW_S) +#define TIME_HOUR_S 14 +#define TIME_HOUR_MASK (0x3f << TIME_HOUR_S) +#define TIME_MIN_S 7 +#define TIME_MIN_MASK (0x7f << TIME_MIN_S) +#define TIME_SEC_MASK 0x7f + +#define ALARM_DAY_S 20 +#define ALARM_DAY_MASK (0x3f << ALARM_DAY_S) + +#define ALARM_DAY_BIT (1 << 29) +#define ALARM_HOUR_BIT (1 << 28) +#define ALARM_MIN_BIT (1 << 27) +#define ALARM_SEC_BIT (1 << 26) + +#define ALARM_ENABLE_MASK (ALARM_DAY_BIT \ + | ALARM_HOUR_BIT \ + | ALARM_MIN_BIT \ + | ALARM_SEC_BIT) + +#define VT8500_RTC_CR_ENABLE (1 << 0) /* Enable RTC */ +#define VT8500_RTC_CR_12H (1 << 1) /* 12h time format */ +#define VT8500_RTC_CR_SM_ENABLE (1 << 2) /* Enable periodic irqs */ +#define VT8500_RTC_CR_SM_SEC (1 << 3) /* 0: 1Hz/60, 1: 1Hz */ +#define VT8500_RTC_CR_CALIB (1 << 4) /* Enable calibration */ + +#define VT8500_RTC_IS_ALARM (1 << 0) /* Alarm interrupt status */ + +struct vt8500_rtc { + void __iomem *regbase; + int irq_alarm; + struct rtc_device *rtc; + spinlock_t lock; /* Protects this structure */ +}; + +static irqreturn_t vt8500_rtc_irq(int irq, void *dev_id) +{ + struct vt8500_rtc *vt8500_rtc = dev_id; + u32 isr; + unsigned long events = 0; + + spin_lock(&vt8500_rtc->lock); + + /* clear interrupt sources */ + isr = readl(vt8500_rtc->regbase + VT8500_RTC_IS); + writel(isr, vt8500_rtc->regbase + VT8500_RTC_IS); + + spin_unlock(&vt8500_rtc->lock); + + if (isr & VT8500_RTC_IS_ALARM) + events |= RTC_AF | RTC_IRQF; + + rtc_update_irq(vt8500_rtc->rtc, 1, events); + + return IRQ_HANDLED; +} + +static int vt8500_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct vt8500_rtc *vt8500_rtc = dev_get_drvdata(dev); + u32 date, time; + + date = readl(vt8500_rtc->regbase + VT8500_RTC_DR); + time = readl(vt8500_rtc->regbase + VT8500_RTC_TR); + + tm->tm_sec = bcd2bin(time & TIME_SEC_MASK); + tm->tm_min = bcd2bin((time & TIME_MIN_MASK) >> TIME_MIN_S); + tm->tm_hour = bcd2bin((time & TIME_HOUR_MASK) >> TIME_HOUR_S); + tm->tm_mday = bcd2bin(date & DATE_DAY_MASK); + tm->tm_mon = bcd2bin((date & DATE_MONTH_MASK) >> DATE_MONTH_S) - 1; + tm->tm_year = bcd2bin((date & DATE_YEAR_MASK) >> DATE_YEAR_S) + + ((date >> DATE_CENTURY_S) & 1 ? 200 : 100); + tm->tm_wday = (time & TIME_DOW_MASK) >> TIME_DOW_S; + + return 0; +} + +static int vt8500_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct vt8500_rtc *vt8500_rtc = dev_get_drvdata(dev); + + if (tm->tm_year < 100) { + dev_warn(dev, "Only years 2000-2199 are supported by the " + "hardware!\n"); + return -EINVAL; + } + + writel((bin2bcd(tm->tm_year % 100) << DATE_YEAR_S) + | (bin2bcd(tm->tm_mon + 1) << DATE_MONTH_S) + | (bin2bcd(tm->tm_mday)) + | ((tm->tm_year >= 200) << DATE_CENTURY_S), + vt8500_rtc->regbase + VT8500_RTC_DS); + writel((bin2bcd(tm->tm_wday) << TIME_DOW_S) + | (bin2bcd(tm->tm_hour) << TIME_HOUR_S) + | (bin2bcd(tm->tm_min) << TIME_MIN_S) + | (bin2bcd(tm->tm_sec)), + vt8500_rtc->regbase + VT8500_RTC_TS); + + return 0; +} + +static int vt8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct vt8500_rtc *vt8500_rtc = dev_get_drvdata(dev); + u32 isr, alarm; + + alarm = readl(vt8500_rtc->regbase + VT8500_RTC_AS); + isr = readl(vt8500_rtc->regbase + VT8500_RTC_IS); + + alrm->time.tm_mday = bcd2bin((alarm & ALARM_DAY_MASK) >> ALARM_DAY_S); + alrm->time.tm_hour = bcd2bin((alarm & TIME_HOUR_MASK) >> TIME_HOUR_S); + alrm->time.tm_min = bcd2bin((alarm & TIME_MIN_MASK) >> TIME_MIN_S); + alrm->time.tm_sec = bcd2bin((alarm & TIME_SEC_MASK)); + + alrm->enabled = (alarm & ALARM_ENABLE_MASK) ? 1 : 0; + alrm->pending = (isr & VT8500_RTC_IS_ALARM) ? 1 : 0; + + return rtc_valid_tm(&alrm->time); +} + +static int vt8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct vt8500_rtc *vt8500_rtc = dev_get_drvdata(dev); + + writel((alrm->enabled ? ALARM_ENABLE_MASK : 0) + | (bin2bcd(alrm->time.tm_mday) << ALARM_DAY_S) + | (bin2bcd(alrm->time.tm_hour) << TIME_HOUR_S) + | (bin2bcd(alrm->time.tm_min) << TIME_MIN_S) + | (bin2bcd(alrm->time.tm_sec)), + vt8500_rtc->regbase + VT8500_RTC_AS); + + return 0; +} + +static int vt8500_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct vt8500_rtc *vt8500_rtc = dev_get_drvdata(dev); + unsigned long tmp = readl(vt8500_rtc->regbase + VT8500_RTC_AS); + + if (enabled) + tmp |= ALARM_ENABLE_MASK; + else + tmp &= ~ALARM_ENABLE_MASK; + + writel(tmp, vt8500_rtc->regbase + VT8500_RTC_AS); + return 0; +} + +static const struct rtc_class_ops vt8500_rtc_ops = { + .read_time = vt8500_rtc_read_time, + .set_time = vt8500_rtc_set_time, + .read_alarm = vt8500_rtc_read_alarm, + .set_alarm = vt8500_rtc_set_alarm, + .alarm_irq_enable = vt8500_alarm_irq_enable, +}; + +static int vt8500_rtc_probe(struct platform_device *pdev) +{ + struct vt8500_rtc *vt8500_rtc; + struct resource *res; + int ret; + + vt8500_rtc = devm_kzalloc(&pdev->dev, + sizeof(struct vt8500_rtc), GFP_KERNEL); + if (!vt8500_rtc) + return -ENOMEM; + + spin_lock_init(&vt8500_rtc->lock); + platform_set_drvdata(pdev, vt8500_rtc); + + vt8500_rtc->irq_alarm = platform_get_irq(pdev, 0); + if (vt8500_rtc->irq_alarm < 0) { + dev_err(&pdev->dev, "No alarm IRQ resource defined\n"); + return vt8500_rtc->irq_alarm; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + vt8500_rtc->regbase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(vt8500_rtc->regbase)) + return PTR_ERR(vt8500_rtc->regbase); + + /* Enable RTC and set it to 24-hour mode */ + writel(VT8500_RTC_CR_ENABLE, + vt8500_rtc->regbase + VT8500_RTC_CR); + + vt8500_rtc->rtc = devm_rtc_device_register(&pdev->dev, "vt8500-rtc", + &vt8500_rtc_ops, THIS_MODULE); + if (IS_ERR(vt8500_rtc->rtc)) { + ret = PTR_ERR(vt8500_rtc->rtc); + dev_err(&pdev->dev, + "Failed to register RTC device -> %d\n", ret); + goto err_return; + } + + ret = devm_request_irq(&pdev->dev, vt8500_rtc->irq_alarm, + vt8500_rtc_irq, 0, "rtc alarm", vt8500_rtc); + if (ret < 0) { + dev_err(&pdev->dev, "can't get irq %i, err %d\n", + vt8500_rtc->irq_alarm, ret); + goto err_return; + } + + return 0; + +err_return: + return ret; +} + +static int vt8500_rtc_remove(struct platform_device *pdev) +{ + struct vt8500_rtc *vt8500_rtc = platform_get_drvdata(pdev); + + /* Disable alarm matching */ + writel(0, vt8500_rtc->regbase + VT8500_RTC_IS); + + return 0; +} + +static const struct of_device_id wmt_dt_ids[] = { + { .compatible = "via,vt8500-rtc", }, + {} +}; + +static struct platform_driver vt8500_rtc_driver = { + .probe = vt8500_rtc_probe, + .remove = vt8500_rtc_remove, + .driver = { + .name = "vt8500-rtc", + .owner = THIS_MODULE, + .of_match_table = wmt_dt_ids, + }, +}; + +module_platform_driver(vt8500_rtc_driver); + +MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>"); +MODULE_DESCRIPTION("VIA VT8500 SoC Realtime Clock Driver (RTC)"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:vt8500-rtc"); diff --git a/drivers/rtc/rtc-wm831x.c b/drivers/rtc/rtc-wm831x.c index 82931dc65c0..75aea4c4d33 100644 --- a/drivers/rtc/rtc-wm831x.c +++ b/drivers/rtc/rtc-wm831x.c @@ -24,7 +24,7 @@ #include <linux/mfd/wm831x/core.h> #include <linux/delay.h> #include <linux/platform_device.h> - +#include <linux/random.h> /* * R16416 (0x4020) - RTC Write Counter @@ -96,6 +96,26 @@ struct wm831x_rtc { unsigned int alarm_enabled:1; }; +static void wm831x_rtc_add_randomness(struct wm831x *wm831x) +{ + int ret; + u16 reg; + + /* + * The write counter contains a pseudo-random number which is + * regenerated every time we set the RTC so it should be a + * useful per-system source of entropy. + */ + ret = wm831x_reg_read(wm831x, WM831X_RTC_WRITE_COUNTER); + if (ret >= 0) { + reg = ret; + add_device_randomness(®, sizeof(reg)); + } else { + dev_warn(wm831x->dev, "Failed to read RTC write counter: %d\n", + ret); + } +} + /* * Read current time and date in RTC */ @@ -315,21 +335,6 @@ static int wm831x_rtc_alarm_irq_enable(struct device *dev, return wm831x_rtc_stop_alarm(wm831x_rtc); } -static int wm831x_rtc_update_irq_enable(struct device *dev, - unsigned int enabled) -{ - struct wm831x_rtc *wm831x_rtc = dev_get_drvdata(dev); - int val; - - if (enabled) - val = 1 << WM831X_RTC_PINT_FREQ_SHIFT; - else - val = 0; - - return wm831x_set_bits(wm831x_rtc->wm831x, WM831X_RTC_CONTROL, - WM831X_RTC_PINT_FREQ_MASK, val); -} - static irqreturn_t wm831x_alm_irq(int irq, void *data) { struct wm831x_rtc *wm831x_rtc = data; @@ -339,22 +344,12 @@ static irqreturn_t wm831x_alm_irq(int irq, void *data) return IRQ_HANDLED; } -static irqreturn_t wm831x_per_irq(int irq, void *data) -{ - struct wm831x_rtc *wm831x_rtc = data; - - rtc_update_irq(wm831x_rtc->rtc, 1, RTC_IRQF | RTC_UF); - - return IRQ_HANDLED; -} - static const struct rtc_class_ops wm831x_rtc_ops = { .read_time = wm831x_rtc_readtime, .set_mmss = wm831x_rtc_set_mmss, .read_alarm = wm831x_rtc_readalarm, .set_alarm = wm831x_rtc_setalarm, .alarm_irq_enable = wm831x_rtc_alarm_irq_enable, - .update_irq_enable = wm831x_rtc_update_irq_enable, }; #ifdef CONFIG_PM @@ -421,11 +416,10 @@ static int wm831x_rtc_probe(struct platform_device *pdev) { struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); struct wm831x_rtc *wm831x_rtc; - int per_irq = platform_get_irq_byname(pdev, "PER"); - int alm_irq = platform_get_irq_byname(pdev, "ALM"); + int alm_irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "ALM")); int ret = 0; - wm831x_rtc = kzalloc(sizeof(*wm831x_rtc), GFP_KERNEL); + wm831x_rtc = devm_kzalloc(&pdev->dev, sizeof(*wm831x_rtc), GFP_KERNEL); if (wm831x_rtc == NULL) return -ENOMEM; @@ -442,50 +436,30 @@ static int wm831x_rtc_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 1); - wm831x_rtc->rtc = rtc_device_register("wm831x", &pdev->dev, + wm831x_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm831x", &wm831x_rtc_ops, THIS_MODULE); if (IS_ERR(wm831x_rtc->rtc)) { ret = PTR_ERR(wm831x_rtc->rtc); goto err; } - ret = request_threaded_irq(per_irq, NULL, wm831x_per_irq, - IRQF_TRIGGER_RISING, "RTC period", - wm831x_rtc); - if (ret != 0) { - dev_err(&pdev->dev, "Failed to request periodic IRQ %d: %d\n", - per_irq, ret); - } - - ret = request_threaded_irq(alm_irq, NULL, wm831x_alm_irq, - IRQF_TRIGGER_RISING, "RTC alarm", - wm831x_rtc); + ret = devm_request_threaded_irq(&pdev->dev, alm_irq, NULL, + wm831x_alm_irq, + IRQF_TRIGGER_RISING, "RTC alarm", + wm831x_rtc); if (ret != 0) { dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n", alm_irq, ret); } + wm831x_rtc_add_randomness(wm831x); + return 0; err: - kfree(wm831x_rtc); return ret; } -static int __devexit wm831x_rtc_remove(struct platform_device *pdev) -{ - struct wm831x_rtc *wm831x_rtc = platform_get_drvdata(pdev); - int per_irq = platform_get_irq_byname(pdev, "PER"); - int alm_irq = platform_get_irq_byname(pdev, "ALM"); - - free_irq(alm_irq, wm831x_rtc); - free_irq(per_irq, wm831x_rtc); - rtc_device_unregister(wm831x_rtc->rtc); - kfree(wm831x_rtc); - - return 0; -} - static const struct dev_pm_ops wm831x_rtc_pm_ops = { .suspend = wm831x_rtc_suspend, .resume = wm831x_rtc_resume, @@ -499,24 +473,13 @@ static const struct dev_pm_ops wm831x_rtc_pm_ops = { static struct platform_driver wm831x_rtc_driver = { .probe = wm831x_rtc_probe, - .remove = __devexit_p(wm831x_rtc_remove), .driver = { .name = "wm831x-rtc", .pm = &wm831x_rtc_pm_ops, }, }; -static int __init wm831x_rtc_init(void) -{ - return platform_driver_register(&wm831x_rtc_driver); -} -module_init(wm831x_rtc_init); - -static void __exit wm831x_rtc_exit(void) -{ - platform_driver_unregister(&wm831x_rtc_driver); -} -module_exit(wm831x_rtc_exit); +module_platform_driver(wm831x_rtc_driver); MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); MODULE_DESCRIPTION("RTC driver for the WM831x series PMICs"); diff --git a/drivers/rtc/rtc-wm8350.c b/drivers/rtc/rtc-wm8350.c index 3d0dc76b38a..fa247deb9cf 100644 --- a/drivers/rtc/rtc-wm8350.c +++ b/drivers/rtc/rtc-wm8350.c @@ -302,26 +302,6 @@ static int wm8350_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) return ret; } -static int wm8350_rtc_update_irq_enable(struct device *dev, - unsigned int enabled) -{ - struct wm8350 *wm8350 = dev_get_drvdata(dev); - - /* Suppress duplicate changes since genirq nests enable and - * disable calls. */ - if (enabled == wm8350->rtc.update_enabled) - return 0; - - if (enabled) - wm8350_unmask_irq(wm8350, WM8350_IRQ_RTC_SEC); - else - wm8350_mask_irq(wm8350, WM8350_IRQ_RTC_SEC); - - wm8350->rtc.update_enabled = enabled; - - return 0; -} - static irqreturn_t wm8350_rtc_alarm_handler(int irq, void *data) { struct wm8350 *wm8350 = data; @@ -357,10 +337,9 @@ static const struct rtc_class_ops wm8350_rtc_ops = { .read_alarm = wm8350_rtc_readalarm, .set_alarm = wm8350_rtc_setalarm, .alarm_irq_enable = wm8350_rtc_alarm_irq_enable, - .update_irq_enable = wm8350_rtc_update_irq_enable, }; -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int wm8350_rtc_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -396,10 +375,6 @@ static int wm8350_rtc_resume(struct device *dev) return 0; } - -#else -#define wm8350_rtc_suspend NULL -#define wm8350_rtc_resume NULL #endif static int wm8350_rtc_probe(struct platform_device *pdev) @@ -460,8 +435,8 @@ static int wm8350_rtc_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 1); - wm_rtc->rtc = rtc_device_register("wm8350", &pdev->dev, - &wm8350_rtc_ops, THIS_MODULE); + wm_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm8350", + &wm8350_rtc_ops, THIS_MODULE); if (IS_ERR(wm_rtc->rtc)) { ret = PTR_ERR(wm_rtc->rtc); dev_err(&pdev->dev, "failed to register RTC: %d\n", ret); @@ -480,44 +455,29 @@ static int wm8350_rtc_probe(struct platform_device *pdev) return 0; } -static int __devexit wm8350_rtc_remove(struct platform_device *pdev) +static int wm8350_rtc_remove(struct platform_device *pdev) { struct wm8350 *wm8350 = platform_get_drvdata(pdev); - struct wm8350_rtc *wm_rtc = &wm8350->rtc; wm8350_free_irq(wm8350, WM8350_IRQ_RTC_SEC, wm8350); wm8350_free_irq(wm8350, WM8350_IRQ_RTC_ALM, wm8350); - rtc_device_unregister(wm_rtc->rtc); - return 0; } -static struct dev_pm_ops wm8350_rtc_pm_ops = { - .suspend = wm8350_rtc_suspend, - .resume = wm8350_rtc_resume, -}; +static SIMPLE_DEV_PM_OPS(wm8350_rtc_pm_ops, wm8350_rtc_suspend, + wm8350_rtc_resume); static struct platform_driver wm8350_rtc_driver = { .probe = wm8350_rtc_probe, - .remove = __devexit_p(wm8350_rtc_remove), + .remove = wm8350_rtc_remove, .driver = { .name = "wm8350-rtc", .pm = &wm8350_rtc_pm_ops, }, }; -static int __init wm8350_rtc_init(void) -{ - return platform_driver_register(&wm8350_rtc_driver); -} -module_init(wm8350_rtc_init); - -static void __exit wm8350_rtc_exit(void) -{ - platform_driver_unregister(&wm8350_rtc_driver); -} -module_exit(wm8350_rtc_exit); +module_platform_driver(wm8350_rtc_driver); MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); MODULE_DESCRIPTION("RTC driver for the WM8350"); diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c index 9aae49139a0..b1de58e0b3d 100644 --- a/drivers/rtc/rtc-x1205.c +++ b/drivers/rtc/rtc-x1205.c @@ -4,7 +4,7 @@ * Copyright 2005 Alessandro Zummo * * please send all reports to: - * Karen Spearel <kas111 at gmail dot com> + * Karen Spearel <kas111 at gmail dot com> * Alessandro Zummo <a.zummo@towertech.it> * * based on a lot of other RTC drivers. @@ -21,6 +21,7 @@ #include <linux/bcd.h> #include <linux/rtc.h> #include <linux/delay.h> +#include <linux/module.h> #define DRV_VERSION "1.0.8" @@ -96,8 +97,17 @@ static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm, int i; struct i2c_msg msgs[] = { - { client->addr, 0, 2, dt_addr }, /* setup read ptr */ - { client->addr, I2C_M_RD, 8, buf }, /* read date */ + {/* setup read ptr */ + .addr = client->addr, + .len = 2, + .buf = dt_addr + }, + {/* read date */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 8, + .buf = buf + }, }; /* read date registers */ @@ -141,8 +151,17 @@ static int x1205_get_status(struct i2c_client *client, unsigned char *sr) static unsigned char sr_addr[2] = { 0, X1205_REG_SR }; struct i2c_msg msgs[] = { - { client->addr, 0, 2, sr_addr }, /* setup read ptr */ - { client->addr, I2C_M_RD, 1, sr }, /* read status */ + { /* setup read ptr */ + .addr = client->addr, + .len = 2, + .buf = sr_addr + }, + { /* read status */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = sr + }, }; /* read status register */ @@ -196,12 +215,14 @@ static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, buf[i] |= 0x80; /* this sequence is required to unlock the chip */ - if ((xfer = i2c_master_send(client, wel, 3)) != 3) { + xfer = i2c_master_send(client, wel, 3); + if (xfer != 3) { dev_err(&client->dev, "%s: wel - %d\n", __func__, xfer); return -EIO; } - if ((xfer = i2c_master_send(client, rwel, 3)) != 3) { + xfer = i2c_master_send(client, rwel, 3); + if (xfer != 3) { dev_err(&client->dev, "%s: rwel - %d\n", __func__, xfer); return -EIO; } @@ -250,7 +271,8 @@ static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, } /* disable further writes */ - if ((xfer = i2c_master_send(client, diswe, 3)) != 3) { + xfer = i2c_master_send(client, diswe, 3); + if (xfer != 3) { dev_err(&client->dev, "%s: diswe - %d\n", __func__, xfer); return -EIO; } @@ -278,8 +300,17 @@ static int x1205_get_dtrim(struct i2c_client *client, int *trim) static unsigned char dtr_addr[2] = { 0, X1205_REG_DTR }; struct i2c_msg msgs[] = { - { client->addr, 0, 2, dtr_addr }, /* setup read ptr */ - { client->addr, I2C_M_RD, 1, &dtr }, /* read dtr */ + { /* setup read ptr */ + .addr = client->addr, + .len = 2, + .buf = dtr_addr + }, + { /* read dtr */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = &dtr + }, }; /* read dtr register */ @@ -310,8 +341,17 @@ static int x1205_get_atrim(struct i2c_client *client, int *trim) static unsigned char atr_addr[2] = { 0, X1205_REG_ATR }; struct i2c_msg msgs[] = { - { client->addr, 0, 2, atr_addr }, /* setup read ptr */ - { client->addr, I2C_M_RD, 1, &atr }, /* read atr */ + {/* setup read ptr */ + .addr = client->addr, + .len = 2, + .buf = atr_addr + }, + {/* read atr */ + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = &atr + }, }; /* read atr register */ @@ -338,8 +378,7 @@ static int x1205_get_atrim(struct i2c_client *client, int *trim) return 0; } -struct x1205_limit -{ +struct x1205_limit { unsigned char reg, mask, min, max; }; @@ -380,11 +419,21 @@ static int x1205_validate_client(struct i2c_client *client) unsigned char addr[2] = { 0, probe_zero_pattern[i] }; struct i2c_msg msgs[2] = { - { client->addr, 0, 2, addr }, - { client->addr, I2C_M_RD, 1, &buf }, + { + .addr = client->addr, + .len = 2, + .buf = addr + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = &buf + }, }; - if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) { + xfer = i2c_transfer(client->adapter, msgs, 2); + if (xfer != 2) { dev_err(&client->dev, "%s: could not read register %x\n", __func__, probe_zero_pattern[i]); @@ -408,11 +457,21 @@ static int x1205_validate_client(struct i2c_client *client) unsigned char addr[2] = { 0, probe_limits_pattern[i].reg }; struct i2c_msg msgs[2] = { - { client->addr, 0, 2, addr }, - { client->addr, I2C_M_RD, 1, ® }, + { + .addr = client->addr, + .len = 2, + .buf = addr + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = ® + }, }; - if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) { + xfer = i2c_transfer(client->adapter, msgs, 2); + if (xfer != 2) { dev_err(&client->dev, "%s: could not read register %x\n", __func__, probe_limits_pattern[i].reg); @@ -443,8 +502,18 @@ static int x1205_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static unsigned char int_addr[2] = { 0, X1205_REG_INT }; struct i2c_client *client = to_i2c_client(dev); struct i2c_msg msgs[] = { - { client->addr, 0, 2, int_addr }, /* setup read ptr */ - { client->addr, I2C_M_RD, 1, &intreg }, /* read INT register */ + { /* setup read ptr */ + .addr = client->addr, + .len = 2, + .buf = int_addr + }, + {/* read INT register */ + + .addr = client->addr, + .flags = I2C_M_RD, + .len = 1, + .buf = &intreg + }, }; /* read interrupt register and status register */ @@ -483,10 +552,12 @@ static int x1205_rtc_proc(struct device *dev, struct seq_file *seq) { int err, dtrim, atrim; - if ((err = x1205_get_dtrim(to_i2c_client(dev), &dtrim)) == 0) + err = x1205_get_dtrim(to_i2c_client(dev), &dtrim); + if (!err) seq_printf(seq, "digital_trim\t: %d ppm\n", dtrim); - if ((err = x1205_get_atrim(to_i2c_client(dev), &atrim)) == 0) + err = x1205_get_atrim(to_i2c_client(dev), &atrim); + if (!err) seq_printf(seq, "analog_trim\t: %d.%02d pF\n", atrim / 1000, atrim % 1000); return 0; @@ -565,16 +636,17 @@ static int x1205_probe(struct i2c_client *client, dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); - rtc = rtc_device_register(x1205_driver.driver.name, &client->dev, - &x1205_rtc_ops, THIS_MODULE); + rtc = devm_rtc_device_register(&client->dev, x1205_driver.driver.name, + &x1205_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); i2c_set_clientdata(client, rtc); - /* Check for power failures and eventualy enable the osc */ - if ((err = x1205_get_status(client, &sr)) == 0) { + /* Check for power failures and eventually enable the osc */ + err = x1205_get_status(client, &sr); + if (!err) { if (sr & X1205_SR_RTCF) { dev_err(&client->dev, "power failure detected, " @@ -582,27 +654,19 @@ static int x1205_probe(struct i2c_client *client, udelay(50); x1205_fix_osc(client); } - } - else + } else { dev_err(&client->dev, "couldn't read status\n"); + } err = x1205_sysfs_register(&client->dev); if (err) - goto exit_devreg; + dev_err(&client->dev, "Unable to create sysfs entries\n"); return 0; - -exit_devreg: - rtc_device_unregister(rtc); - - return err; } static int x1205_remove(struct i2c_client *client) { - struct rtc_device *rtc = i2c_get_clientdata(client); - - rtc_device_unregister(rtc); x1205_sysfs_unregister(&client->dev); return 0; } @@ -622,15 +686,7 @@ static struct i2c_driver x1205_driver = { .id_table = x1205_id, }; -static int __init x1205_init(void) -{ - return i2c_add_driver(&x1205_driver); -} - -static void __exit x1205_exit(void) -{ - i2c_del_driver(&x1205_driver); -} +module_i2c_driver(x1205_driver); MODULE_AUTHOR( "Karen Spearel <kas111 at gmail dot com>, " @@ -638,6 +694,3 @@ MODULE_AUTHOR( MODULE_DESCRIPTION("Xicor/Intersil X1205 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(x1205_init); -module_exit(x1205_exit); diff --git a/drivers/rtc/rtc-xgene.c b/drivers/rtc/rtc-xgene.c new file mode 100644 index 00000000000..14129cc85bd --- /dev/null +++ b/drivers/rtc/rtc-xgene.c @@ -0,0 +1,278 @@ +/* + * APM X-Gene SoC Real Time Clock Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Author: Rameshwar Prasad Sahu <rsahu@apm.com> + * Loc Ho <lho@apm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/rtc.h> + +/* RTC CSR Registers */ +#define RTC_CCVR 0x00 +#define RTC_CMR 0x04 +#define RTC_CLR 0x08 +#define RTC_CCR 0x0C +#define RTC_CCR_IE BIT(0) +#define RTC_CCR_MASK BIT(1) +#define RTC_CCR_EN BIT(2) +#define RTC_CCR_WEN BIT(3) +#define RTC_STAT 0x10 +#define RTC_STAT_BIT BIT(0) +#define RTC_RSTAT 0x14 +#define RTC_EOI 0x18 +#define RTC_VER 0x1C + +struct xgene_rtc_dev { + struct rtc_device *rtc; + struct device *dev; + unsigned long alarm_time; + void __iomem *csr_base; + struct clk *clk; + unsigned int irq_wake; +}; + +static int xgene_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct xgene_rtc_dev *pdata = dev_get_drvdata(dev); + + rtc_time_to_tm(readl(pdata->csr_base + RTC_CCVR), tm); + return rtc_valid_tm(tm); +} + +static int xgene_rtc_set_mmss(struct device *dev, unsigned long secs) +{ + struct xgene_rtc_dev *pdata = dev_get_drvdata(dev); + + /* + * NOTE: After the following write, the RTC_CCVR is only reflected + * after the update cycle of 1 seconds. + */ + writel((u32) secs, pdata->csr_base + RTC_CLR); + readl(pdata->csr_base + RTC_CLR); /* Force a barrier */ + + return 0; +} + +static int xgene_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct xgene_rtc_dev *pdata = dev_get_drvdata(dev); + + rtc_time_to_tm(pdata->alarm_time, &alrm->time); + alrm->enabled = readl(pdata->csr_base + RTC_CCR) & RTC_CCR_IE; + + return 0; +} + +static int xgene_rtc_alarm_irq_enable(struct device *dev, u32 enabled) +{ + struct xgene_rtc_dev *pdata = dev_get_drvdata(dev); + u32 ccr; + + ccr = readl(pdata->csr_base + RTC_CCR); + if (enabled) { + ccr &= ~RTC_CCR_MASK; + ccr |= RTC_CCR_IE; + } else { + ccr &= ~RTC_CCR_IE; + ccr |= RTC_CCR_MASK; + } + writel(ccr, pdata->csr_base + RTC_CCR); + + return 0; +} + +static int xgene_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct xgene_rtc_dev *pdata = dev_get_drvdata(dev); + unsigned long rtc_time; + unsigned long alarm_time; + + rtc_time = readl(pdata->csr_base + RTC_CCVR); + rtc_tm_to_time(&alrm->time, &alarm_time); + + pdata->alarm_time = alarm_time; + writel((u32) pdata->alarm_time, pdata->csr_base + RTC_CMR); + + xgene_rtc_alarm_irq_enable(dev, alrm->enabled); + + return 0; +} + +static const struct rtc_class_ops xgene_rtc_ops = { + .read_time = xgene_rtc_read_time, + .set_mmss = xgene_rtc_set_mmss, + .read_alarm = xgene_rtc_read_alarm, + .set_alarm = xgene_rtc_set_alarm, + .alarm_irq_enable = xgene_rtc_alarm_irq_enable, +}; + +static irqreturn_t xgene_rtc_interrupt(int irq, void *id) +{ + struct xgene_rtc_dev *pdata = (struct xgene_rtc_dev *) id; + + /* Check if interrupt asserted */ + if (!(readl(pdata->csr_base + RTC_STAT) & RTC_STAT_BIT)) + return IRQ_NONE; + + /* Clear interrupt */ + readl(pdata->csr_base + RTC_EOI); + + rtc_update_irq(pdata->rtc, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static int xgene_rtc_probe(struct platform_device *pdev) +{ + struct xgene_rtc_dev *pdata; + struct resource *res; + int ret; + int irq; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + platform_set_drvdata(pdev, pdata); + pdata->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pdata->csr_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pdata->csr_base)) + return PTR_ERR(pdata->csr_base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "No IRQ resource\n"); + return irq; + } + ret = devm_request_irq(&pdev->dev, irq, xgene_rtc_interrupt, 0, + dev_name(&pdev->dev), pdata); + if (ret) { + dev_err(&pdev->dev, "Could not request IRQ\n"); + return ret; + } + + pdata->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(pdata->clk)) { + dev_err(&pdev->dev, "Couldn't get the clock for RTC\n"); + return -ENODEV; + } + clk_prepare_enable(pdata->clk); + + /* Turn on the clock and the crystal */ + writel(RTC_CCR_EN, pdata->csr_base + RTC_CCR); + + device_init_wakeup(&pdev->dev, 1); + + pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &xgene_rtc_ops, THIS_MODULE); + if (IS_ERR(pdata->rtc)) { + clk_disable_unprepare(pdata->clk); + return PTR_ERR(pdata->rtc); + } + + /* HW does not support update faster than 1 seconds */ + pdata->rtc->uie_unsupported = 1; + + return 0; +} + +static int xgene_rtc_remove(struct platform_device *pdev) +{ + struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev); + + xgene_rtc_alarm_irq_enable(&pdev->dev, 0); + device_init_wakeup(&pdev->dev, 0); + clk_disable_unprepare(pdata->clk); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int xgene_rtc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev); + int irq; + + irq = platform_get_irq(pdev, 0); + if (device_may_wakeup(&pdev->dev)) { + if (!enable_irq_wake(irq)) + pdata->irq_wake = 1; + } else { + xgene_rtc_alarm_irq_enable(dev, 0); + clk_disable(pdata->clk); + } + + return 0; +} + +static int xgene_rtc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev); + int irq; + + irq = platform_get_irq(pdev, 0); + if (device_may_wakeup(&pdev->dev)) { + if (pdata->irq_wake) { + disable_irq_wake(irq); + pdata->irq_wake = 0; + } + } else { + clk_enable(pdata->clk); + xgene_rtc_alarm_irq_enable(dev, 1); + } + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(xgene_rtc_pm_ops, xgene_rtc_suspend, xgene_rtc_resume); + +#ifdef CONFIG_OF +static const struct of_device_id xgene_rtc_of_match[] = { + {.compatible = "apm,xgene-rtc" }, + { } +}; +MODULE_DEVICE_TABLE(of, xgene_rtc_of_match); +#endif + +static struct platform_driver xgene_rtc_driver = { + .probe = xgene_rtc_probe, + .remove = xgene_rtc_remove, + .driver = { + .owner = THIS_MODULE, + .name = "xgene-rtc", + .pm = &xgene_rtc_pm_ops, + .of_match_table = of_match_ptr(xgene_rtc_of_match), + }, +}; + +module_platform_driver(xgene_rtc_driver); + +MODULE_DESCRIPTION("APM X-Gene SoC RTC driver"); +MODULE_AUTHOR("Rameshwar Sahu <rsahu@apm.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/systohc.c b/drivers/rtc/systohc.c new file mode 100644 index 00000000000..bf3e242ccc5 --- /dev/null +++ b/drivers/rtc/systohc.c @@ -0,0 +1,44 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + */ +#include <linux/rtc.h> +#include <linux/time.h> + +/** + * rtc_set_ntp_time - Save NTP synchronized time to the RTC + * @now: Current time of day + * + * Replacement for the NTP platform function update_persistent_clock + * that stores time for later retrieval by rtc_hctosys. + * + * Returns 0 on successful RTC update, -ENODEV if a RTC update is not + * possible at all, and various other -errno for specific temporary failure + * cases. + * + * If temporary failure is indicated the caller should try again 'soon' + */ +int rtc_set_ntp_time(struct timespec now) +{ + struct rtc_device *rtc; + struct rtc_time tm; + int err = -ENODEV; + + if (now.tv_nsec < (NSEC_PER_SEC >> 1)) + rtc_time_to_tm(now.tv_sec, &tm); + else + rtc_time_to_tm(now.tv_sec + 1, &tm); + + rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE); + if (rtc) { + /* rtc_hctosys exclusively uses UTC, so we call set_time here, + * not set_mmss. */ + if (rtc->ops && (rtc->ops->set_time || rtc->ops->set_mmss)) + err = rtc_set_time(rtc, &tm); + rtc_class_close(rtc); + } + + return err; +} |