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2013-06-12pwm: add pca9685 driverSteffen Trumtrar
Add pwm driver for the NXP pca9685 16 channel pwm-led controller. The driver is really barebones at this stage. E.g. the OE' pin and therefore the corresponding registers are not supported. The driver was tested on a HW where this pin is tied to GND. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> [thierry.reding@gmail.com: style and whitespace cleanups] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-12mfd: DT bindings for the palmas family MFDJ Keerthy
Add the various binding files for the palmas family of chips. There is a top level MFD binding then a seperate binding for regulators IP blocks on chips. Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: J Keerthy <j-keerthy@ti.com> Signed-off-by: Ian Lartey <ian@slimlogic.co.uk> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-06-11ARM: socfpga: dts: Add gate-clock bindingsDinh Nguyen
Add bindings for "socfpga-gate-clk" clocks. These clocks directly feed the peripherals. Signed-off-by: Dinh Nguyen <dinguyen@altera.com> Reviewed-by: Pavel Machek <pavel@denx.de> CC: Arnd Bergmann <arnd@arndb.de> CC: Olof Johansson <olof@lixom.net> Cc: Pavel Machek <pavel@denx.de> CC: <linux@arm.linux.org.uk> Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-11Merge branch 'clps711x/soc' into next/socOlof Johansson
From Alexander Shiyan, this is a series of cleanups of clps711x, movig it closer to multiplatform and cleans up a bunch of old code. * clps711x/soc: ARM: clps711x: Update defconfig ARM: clps711x: Add support for SYSCON driver ARM: clps711x: edb7211: Control LCD backlight via PWM ARM: clps711x: edb7211: Add support for I2C ARM: clps711x: Optimize interrupt handling ARM: clps711x: Add clocksource framework ARM: clps711x: Replace "arch_initcall" in common code with ".init_early" ARM: clps711x: Move specific definitions from hardware.h to boards files ARM: clps711x: p720t: Define PLD registers as GPIOs ARM: clps711x: autcpu12: Move remaining specific definitions to board file ARM: clps711x: autcpu12: Special driver for handling memory is removed ARM: clps711x: autcpu12: Add support for NOR flash ARM: clps711x: autcpu12: Move LCD DPOT definitions to board file ARM: clps711x: Set PLL clock to zero if we work from 13 mHz source ARM: clps711x: Remove NEED_MACH_MEMORY_H dependency ARM: clps711x: Re-add GPIO support GPIO: clps711x: Add DT support GPIO: clps711x: Rewrite driver for using generic GPIO code + Linux 3.10-rc4 Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-11GPIO: clps711x: Add DT supportAlexander Shiyan
Add DT support to the CLPS711X GPIO driver. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-12Merge branch 'v3.11-next/driver-pinctrl' into v3.11-next/s3c24xx-driverKukjin Kim
2013-06-12Merge branch 'v3.11-next/driver-gpio' into v3.11-next/s3c24xx-driverKukjin Kim
2013-06-12gpio: samsung: Remove OF support for s3c24xxSylwester Nawrocki
There is no users of this code and there is already a pinctrl driver written for s3c24xx which is going to be used on any s3c24xx DT platforms. Hence this has been effectively a dead code in mainline. This reverts commit 172c6a13653ac8cd6a231293b87c93821e90c1d6 gpio: samsung: add devicetree init for s3c24xx arches Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-12ARM: dts: Update G2D documentation for clock entriesSachin Kamat
Added clock entry definitions to G2D bindings document. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-12clk: exynos4: Add additional G2D clocksSachin Kamat
Add G2D clocks for Exynos4x12 SoC and sclk_fimg2d required by G2D IP. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-12ARM: dts: Document DP clock in samsung,exynos5-dp bindingJingoo Han
The exynos5-dp node needs a clock specified using the common clock framework. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Reviewed-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-11iio:dac: Add support for the AD7303Lars-Peter Clausen
This patch adds support for the AD7303. The AD7303 is a simple 2 channel 8 bit DAC with an SPI interface. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-06-11irqchip: Add support for Marvell Orion SoCsSebastian Hesselbarth
This patch adds an irqchip driver for the main interrupt controller found on Marvell Orion SoCs (Kirkwood, Dove, Orion5x, Discovery Innovation). Corresponding device tree documentation is also added. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Rob Landley <rob@landley.net> Cc: John Stultz <john.stultz@linaro.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Gregory Clement <gregory.clement@free-electrons.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1370536034-23956-2-git-send-email-sebastian.hesselbarth@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-10ARM: dts: Update MFC documentation for clock entriesSachin Kamat
Added clock entry definitions to MFC bindings document. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-10ARM: dts: Add device tree bindings for dwc3-exynosVivek Gautam
Document device tree binding information as required by the Samsung' USB 3.0 controller. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-09iio: frequency: adf4350: Add support for dt bindingsMichael Hennerich
Per review feedback from Lars-Peter Clausen <lars@metafoo.de> Changes since V1: Fix return value handling of adf4350_parse_dt() Use of_get_gpio Avoid abbreviations in devicetree properties Fix typo in docs Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-06-08tty: serial: add Freescale lpuart driver supportJingchang Lu
Add Freescale lpuart driver support. The lpuart device can be found on Vybrid VF610 and Layerscape LS-1 SoCs. Signed-off-by: Jingchang Lu <b35083@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-07Merge tag 'zynq-clk-for-3.11' of git://git.xilinx.com/linux-xlnx into next/socOlof Johansson
From Michal Simek: arm: Xilinx Zynq clock changes for v3.11 Change Xilinx Zynq DT clock description which reflects logical abstraction of Zynq's clock tree. - Refactor PLL driver - Use new clock controller driver - Change timer and uart drivers * tag 'zynq-clk-for-3.11' of git://git.xilinx.com/linux-xlnx: clk: zynq: Remove deprecated clock code arm: zynq: Migrate platform to clock controller clk: zynq: Add clock controller driver clk: zynq: Factor out PLL driver Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-07ASoC: wm8962: Add device tree bindingNicolin Chen
Document the device tree binding for the WM8962 codec, and modify the driver to extract platform data from the device tree, if present. Based on work of WM8903 by Stephen Warren <swarren@nvidia.com> Signed-off-by: Nicolin Chen <b42378@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-06-06lp8727_charger: Support the device tree featureKim, Milo
The interrupt and charging parameters are configurable in the device tree structure. In the board test, a GPIO is used for handling LP8727 interrupts. The device tree binding documentation is added also. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
2013-06-06sata highbank: add bit-banged SGPIO driver supportMark Langsdorf
Highbank supports SGPIO by bit-banging out the SGPIO signals over three GPIO pins defined in the DTB. Add support for this SGPIO functionality. Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2013-06-06pcmcia: at91_cf: add support for DTJoachim Eastwood
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-06clocksource: Add TI-Nspire timer supportDaniel Tang
This patch adds a clocksource/clockevent driver for the timer found on some models in the TI-Nspire calculator series. The timer has two 16bit subtimers within its memory mapped I/O interface but only the first can generate interrupts. The first subtimer is used to generate clockevents but only if an interrupt number and register is given. The interrupt acknowledgement mechanism is a little strange because the interrupt mask and acknowledge registers are located in another memory mapped I/O peripheral. The address of this register is passed to the driver through device tree bindings. The second subtimer is used as a clocksource because it isn't capable of generating an interrupt. This subtimer is always added. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Tang <dt.tangr@gmail.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-06-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Merge 'net' bug fixes into 'net-next' as we have patches that will build on top of them. This merge commit includes a change from Emil Goode (emilgoode@gmail.com) that fixes a warning that would have been introduced by this merge. Specifically it fixes the pingv6_ops method ipv6_chk_addr() to add a "const" to the "struct net_device *dev" argument and likewise update the dummy_ipv6_chk_addr() declaration. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-04drivers: net: ethernet: cpsw: add phy-mode support to cpsw driverMugunthan V N
Adding phy-mode support to cpsw driver and updating the cpsw binding documentation. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-04[SCSI] Documentation/devicetree: Add DT bindings for UFS host controllerSujit Reddy Thumma
Compatible list is used in commit 03b1781 but is not documented. Add necessary device tree bindings to describe on-chip UFS host controllers. Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-06-04Input: add TI-Nspire keypad supportDaniel Tang
This is a driver for the keypads found on the TI-Nspire series calculators. Signed-off-by: Daniel Tang <dt.tangr@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-06-04dmaengine: ste_dma40: Fetch disabled channels from DTLee Jones
Some platforms have channels which are not available for normal use. This information is currently passed though platform data in internal BSP kernels. Once those platforms land, they'll need to configure them appropriately, so we may as well add the infrastructure. Cc: Dan Williams <djbw@fb.com> Cc: Per Forlin <per.forlin@stericsson.com> Cc: Rabin Vincent <rabin@rab.in> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-04dmaengine: ste_dma40: Allow memcpy channels to be configured from DTLee Jones
At this moment in time the memcpy channels which can be used by the D40 are fixed, as each supported platform in Mainline uses the same ones. However, platforms do exist which don't follow this convention, so these will need to be tailored. Fortunately, these platforms will be DT only, so this change has very little impact on platform data. Cc: Dan Williams <djbw@fb.com> Cc: Per Forlin <per.forlin@stericsson.com> Cc: Rabin Vincent <rabin@rab.in> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-04usb: musb: ux500: add device tree probing supportLee Jones
This patch will allow ux500-musb to be probed and configured solely from configuration found in Device Tree. Cc: Rob Herring <rob.herring@calxeda.com> Cc: linux-usb@vger.kernel.org Cc: devicetree-discuss@lists.ozlabs.org Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Fabio Baltieri <fabio.baltieri@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-03serial: imx: add support for DTE modeHuang Shijie
The uart works in the DCE mode by default, but sometime we need it works at the DTE mode. This patch adds the support for the DTE mode. Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-03video: of: display_timing: add doubleclk flagSteffen Trumtrar
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-06-03Documentation/devicetree: add a small note on PCILinus Walleij
Throw in a file with references to the IEEE binding documents. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-05-31Merge branch 'VExpress_DCSCB' of git://git.linaro.org/people/nico/linux into ↵Olof Johansson
next/soc From Nicolas Pitre: This is the first MCPM backend submission for VExpress running on RTSM aka Fast Models implementing the big.LITTLE system architecture. This enables SMP secondary boot as well as CPU hotplug on this platform. A big prerequisite for this support is the CCI driver from Lorenzo included in this pull request. Also included is Rob Herring's set_auxcr/get_auxcr allowing nicer code. Signed-off-by: Olof Johansson <olof@lixom.net> * 'VExpress_DCSCB' of git://git.linaro.org/people/nico/linux: ARM: vexpress: Select multi-cluster SMP operation if required ARM: vexpress/dcscb: handle platform coherency exit/setup and CCI ARM: vexpress/dcscb: do not hardcode number of CPUs per cluster ARM: vexpress/dcscb: add CPU use counts to the power up/down API implementation ARM: vexpress: introduce DCSCB support ARM: introduce common set_auxcr/get_auxcr functions drivers/bus: arm-cci: function to enable CCI ports from early boot code drivers: bus: add ARM CCI support
2013-05-31Merge tag 'pcie_kw-3.11' of git://git.infradead.org/users/jcooper/linux into ↵Olof Johansson
next/soc From Jason Cooper: mvebu pcie driver (kirkwood) for v3.11 - kirkwood - enable pcie driver - migrate boards over to pcie dt init depends - mvebu/pcie - mvebu/of_pci Signed-off-by: Olof Johansson <olof@lixom.net> * tag 'pcie_kw-3.11' of git://git.infradead.org/users/jcooper/linux: arm: kirkwood: convert db-88f6281/db-88f6282 to the Device Tree arm: kirkwood: convert QNAP TS219 to use DT for the PCIe interface arm: kirkwood: convert ZyXEL NSA310 to use DT for the PCIe interface arm: kirkwood: convert MPL CEC4 to use DT for the PCIe interface arm: kirkwood: convert Iomega Iconnect to use DT for the PCIe interface arm: kirkwood: add SoC-level Device Tree data for PCIe interfaces arm: kirkwood: move PCIe window init to legacy driver pci: mvebu: enable driver usage on Kirkwood
2013-05-31Merge tag 'pcie-3.11-2' of git://git.infradead.org/users/jcooper/linux into ↵Olof Johansson
next/soc PCI-e driver for mvebu. * tag 'pcie-3.11-2' of git://git.infradead.org/users/jcooper/linux: pci: mvebu: fix return value check in mvebu_pcie_probe() arm: mvebu: PCIe support is now available on mvebu pci: PCIe driver for Marvell Armada 370/XP systems clk: mvebu: add more PCIe clocks for Armada XP clk: mvebu: create parent-child relation for PCIe clocks on Armada 370 of/pci: Add of_pci_parse_bus_range() function of/pci: Add of_pci_get_devfn() function of/pci: Provide support for parsing PCI DT ranges property Signed-off-by: Olof Johansson <olof@lixom.net>
2013-05-31net: Add MDIO bus driver for the Allwinner EMACMaxime Ripard
This patch adds a separate driver for the MDIO interface of the Allwinner ethernet controllers. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Tested-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-31net: Add EMAC ethernet driver found on Allwinner A10 SoC'sStefan Roese
The Allwinner A10 has an ethernet controller that seem to be developped internally by them. The exact feature set of this controller is unknown, since there is no public documentation for this IP, and this driver is mostly the one published by Allwinner that has been heavily cleaned up. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Tested-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-31clk: Add TI-Nspire clock driversDaniel Tang
This patch adds a basic clock driver for the TI-Nspire calculator series. Changes from v1: * Removed filename in header comment * Removed unnecessary #undef EXTRACT statement Signed-off-by: Daniel Tang <dt.tangr@gmail.com> Signed-off-by: Mike Turquette <mturquette@linaro.org> [mturquette@linaro.org: fixed $SUBJECT and changelog max width]
2013-05-31watchdog: coh901327: devicetree supportLinus Walleij
This adds support for probing the COH 901 327 watchdog from the device tree and also adds associated bindings. Acked-by: Wim Van Sebroeck <wim@iguana.be> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-05-31i2c: stu300: device tree supportLinus Walleij
This adds device tree support for the ST DDC I2C driver known as "stu300" in the kernel tree. Reviewed-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-05-31ARM: u300: basic device tree supportLinus Walleij
This register the most basic peripherals and makes the U300 boot to prompt from a device tree. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-05-31pinctrl: coh901: add device tree supportLinus Walleij
This makes it possible to probe the COH901 pinctrl driver from the device tree, and assigned the device tree node in the gpio_chip so we can look up cross-references from the device tree. Start grabbing the per-port (bank) IRQs by index instead of by name so we don't have to look up the IRQs by name going forward. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-05-31ARM: u300: device tree support for the timerLinus Walleij
This adds device tree support for the U300 timer, by making the memory base offset and IRQ dynamically assigned, then optionally looking them up from the device tree. Since the timer needs to be registered before any platform devices are created, we will go into the device tree and look up the "/timer@c0014000" node and read our base address and IRQ from there. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-05-30net: mv643xx_eth: add DT parsing supportSebastian Hesselbarth
This adds device tree parsing support for the shared driver of mv643xx_eth. As the bindings are slightly different from current PPC bindings new binding documentation is also added. Following PPC-style device setup, the shared driver now also adds port platform_devices and sets up port platform_data. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-30usb: misc: usb3503: Adding device tree entry 'disabled-ports'Dongjin Kim
This patch is to add a property 'disabled-ports' representing the unused port of USB3503. USB3503 can support up to 3 USB host port and each ports can be controlled to be enabled or disabled. Do not describe this property if all ports must be enabled. You can represent the ports to disable in the device tree. usb3503@08{ ... disabled-ports = <2 3>; ... }; Signed-off-by: Dongjin Kim <tobetter@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-30Merge tag 'tegra-for-3.11-deps-for-usb' into nextFelipe Balbi
ARM: tegra: DT-related fixes needed by the USB tree The Tegra USB bindings were in bad shape. The patches in this branch fix the binding definitions, and make all the necessary additions to the DT files. Stale nodes/properties will be removed early in 3.12 once the USB driver has been updated for the new binding. These changes are needed in both the USB tree, to allow the driver to be updated to handle them, and the Tegra tree, so that various tree- wide DT changes (e.g. conversion of IRQ/GPIO/clock constants to defines) can be applied on top of them. * tag 'tegra-for-3.11-deps-for-usb': ARM: tegra: update device trees for USB binding rework ARM: tegra: modify ULPI reset GPIO properties ARM: tegra: finalize USB EHCI and PHY bindings Signed-of-by: Felipe Balbi <balbi@ti.com>
2013-05-29clk: vt8500: Add support for clocks on the WM8850 SoCsTony Prisk
The WM8850 has a different PLL clock to the previous versions. This patch adds support for the WM8850-style PLL clocks. Signed-off-by: Tony Prisk <linux@prisktech.co.nz> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29ARM: vexpress: introduce DCSCB supportNicolas Pitre
This adds basic CPU and cluster reset controls on RTSM for the A15x4-A7x4 model configuration using the Dual Cluster System Configuration Block (DCSCB). The cache coherency interconnect (CCI) is not handled yet. Signed-off-by: Nicolas Pitre <nico@linaro.org> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Pawel Moll <pawel.moll@arm.com>
2013-05-29drivers: bus: add ARM CCI supportLorenzo Pieralisi
On ARM multi-cluster systems coherency between cores running on different clusters is managed by the cache-coherent interconnect (CCI). It allows broadcasting of TLB invalidates and memory barriers and it guarantees cache coherency at system level through snooping of slave interfaces connected to it. This patch enables the basic infrastructure required in Linux to handle and programme the CCI component. Non-local variables used by the CCI management functions called by power down function calls after disabling the cache must be flushed out to main memory in advance, otherwise incoherency of those values may occur if they are sitting in the cache of some other CPU when power down functions execute. Driver code ensures that relevant data structures are flushed from inner and outer caches after the driver probe is completed. CCI slave port resources are linked to set of CPUs through bus masters phandle properties that link the interface resources to masters node in the device tree. Documentation describing the CCI DT bindings is provided with the patch. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
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