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| author | Sekhar Nori <nsekhar@ti.com> | 2010-07-20 16:46:49 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-09-24 07:40:24 -0700 |
| commit | b39639b820ca64e55c39b5217773919ca7973cec (patch) | |
| tree | 53b2eba184359e1aa748e40891b3fd4149228697 /arch/arm/mach-davinci/clock.h | |
| parent | 0a477f6b8c1849701981f6e00e7afcd35af75546 (diff) | |
| download | kernel_goldelico_gta04-b39639b820ca64e55c39b5217773919ca7973cec.zip kernel_goldelico_gta04-b39639b820ca64e55c39b5217773919ca7973cec.tar.gz kernel_goldelico_gta04-b39639b820ca64e55c39b5217773919ca7973cec.tar.bz2 | |
davinci: clock: add support for setting sysclk rate
Setting sysclk rate will be useful in cases where the
sysclk is not at a fixed ratio to the PLL output but
can asynchronously be changed.
This support forms the basis of attempt to keep the AEMIF
clock constant on OMAP-L138 even as PLL0 output changes
as ARM clock is changed to save power.
This patch has been tested on OMAP-L138.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/clock.h')
| -rw-r--r-- | arch/arm/mach-davinci/clock.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h index 01e3648..1109998 100644 --- a/arch/arm/mach-davinci/clock.h +++ b/arch/arm/mach-davinci/clock.h @@ -70,6 +70,9 @@ #include <linux/list.h> #include <asm/clkdev.h> +#define PLLSTAT_GOSTAT BIT(0) +#define PLLCMD_GOSET BIT(0) + struct pll_data { u32 phys_base; void __iomem *base; @@ -86,6 +89,7 @@ struct clk { struct module *owner; const char *name; unsigned long rate; + unsigned long maxrate; /* H/W supported max rate */ u8 usecount; u8 lpsc; u8 gpsc; @@ -118,6 +122,7 @@ struct clk { 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); extern struct platform_device davinci_wdt_device; extern void davinci_watchdog_reset(struct platform_device *); |