diff options
Diffstat (limited to 'arch/arm/mach-davinci/clock.h')
| -rw-r--r-- | arch/arm/mach-davinci/clock.h | 86 |
1 files changed, 65 insertions, 21 deletions
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h index 35736ec202f..1e4e836173a 100644 --- a/arch/arm/mach-davinci/clock.h +++ b/arch/arm/mach-davinci/clock.h @@ -12,9 +12,6 @@ #ifndef __ARCH_ARM_DAVINCI_CLOCK_H #define __ARCH_ARM_DAVINCI_CLOCK_H -#include <linux/list.h> -#include <asm/clkdev.h> - #define DAVINCI_PLL1_BASE 0x01c40800 #define DAVINCI_PLL2_BASE 0x01c40c00 #define MAX_PLL 2 @@ -22,6 +19,10 @@ /* PLL/Reset register offsets */ #define PLLCTL 0x100 #define PLLCTL_PLLEN BIT(0) +#define PLLCTL_PLLPWRDN BIT(1) +#define PLLCTL_PLLRST BIT(3) +#define PLLCTL_PLLDIS BIT(4) +#define PLLCTL_PLLENSRC BIT(5) #define PLLCTL_CLKMODE BIT(8) #define PLLM 0x110 @@ -49,12 +50,36 @@ #define PLLDIV_EN BIT(15) #define PLLDIV_RATIO_MASK 0x1f +/* + * OMAP-L138 system reference guide recommends a wait for 4 OSCIN/CLKIN + * cycles to ensure that the PLLC has switched to bypass mode. Delay of 1us + * ensures we are good for all > 4MHz OSCIN/CLKIN inputs. Typically the input + * is ~25MHz. Units are micro seconds. + */ +#define PLL_BYPASS_TIME 1 +/* From OMAP-L138 datasheet table 6-4. Units are micro seconds */ +#define PLL_RESET_TIME 1 +/* + * From OMAP-L138 datasheet table 6-4; assuming prediv = 1, sqrt(pllm) = 4 + * Units are micro seconds. + */ +#define PLL_LOCK_TIME 20 + +#ifndef __ASSEMBLER__ + +#include <linux/list.h> +#include <linux/clkdev.h> + +#define PLLSTAT_GOSTAT BIT(0) +#define PLLCMD_GOSET BIT(0) + struct pll_data { u32 phys_base; void __iomem *base; u32 num; u32 flags; u32 input_rate; + u32 div_ratio_mask; }; #define PLL_HAS_PREDIV 0x01 #define PLL_HAS_POSTDIV 0x02 @@ -64,33 +89,52 @@ struct clk { struct module *owner; const char *name; unsigned long rate; + unsigned long maxrate; /* H/W supported max rate */ u8 usecount; - u8 flags; u8 lpsc; + u8 gpsc; + u8 domain; + u32 flags; struct clk *parent; + struct list_head children; /* list of children */ + struct list_head childnode; /* parent's child list node */ struct pll_data *pll_data; u32 div_reg; + unsigned long (*recalc) (struct clk *); + int (*set_rate) (struct clk *clk, unsigned long rate); + int (*round_rate) (struct clk *clk, unsigned long rate); + int (*reset) (struct clk *clk, bool reset); + void (*clk_enable) (struct clk *clk); + void (*clk_disable) (struct clk *clk); }; -/* Clock flags */ +/* Clock flags: SoC-specific flags start at BIT(16) */ #define ALWAYS_ENABLED BIT(1) -#define CLK_PSC BIT(2) -#define PSC_DSP BIT(3) /* PSC uses DSP domain, not ARM */ -#define CLK_PLL BIT(4) /* PLL-derived clock */ -#define PRE_PLL BIT(5) /* source is before PLL mult/div */ +#define CLK_PSC BIT(2) +#define CLK_PLL BIT(3) /* PLL-derived clock */ +#define PRE_PLL BIT(4) /* source is before PLL mult/div */ +#define PSC_SWRSTDISABLE BIT(5) /* Disable state is SwRstDisable */ +#define PSC_FORCE BIT(6) /* Force module state transtition */ +#define PSC_LRST BIT(8) /* Use local reset on enable/disable */ -struct davinci_clk { - struct clk_lookup lk; -}; +#define CLK(dev, con, ck) \ + { \ + .dev_id = dev, \ + .con_id = con, \ + .clk = ck, \ + } \ -#define CLK(dev, con, ck) \ - { \ - .lk = { \ - .dev_id = dev, \ - .con_id = con, \ - .clk = ck, \ - }, \ - } +int davinci_clk_init(struct clk_lookup *clocks); +int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv, + unsigned int mult, unsigned int postdiv); +int davinci_set_sysclk_rate(struct clk *clk, unsigned long rate); +int davinci_set_refclk_rate(unsigned long rate); +int davinci_simple_set_rate(struct clk *clk, unsigned long rate); +int davinci_clk_reset(struct clk *clk, bool reset); + +extern struct platform_device davinci_wdt_device; +extern void davinci_watchdog_reset(struct platform_device *); + +#endif -int davinci_clk_init(struct davinci_clk *clocks); #endif |