From 908b75e850c4a6130b680ea7e59b00f80d4cd2d2 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Tue, 25 Sep 2012 19:33:39 +0300 Subject: ARM: OMAP: add support for oscillator setup This contains startup and shutdown times for the oscillator. By default use ULONG_MAX. Oscillator setup is used for calculating and setting up latencies for sleep modes that disable oscillator. Based on a patch from Nishanth Menon . Signed-off-by: Tero Kristo Signed-off-by: Kevin Hilman --- arch/arm/mach-omap2/pm.c | 30 ++++++++++++++++++++++++++++++ arch/arm/mach-omap2/pm.h | 8 ++++++++ 2 files changed, 38 insertions(+) diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index ea61c32957bd..109a02e02d72 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -39,6 +39,36 @@ static struct omap_device_pm_latency *pm_lats; */ int (*omap_pm_suspend)(void); +/** + * struct omap2_oscillator - Describe the board main oscillator latencies + * @startup_time: oscillator startup latency + * @shutdown_time: oscillator shutdown latency + */ +struct omap2_oscillator { + u32 startup_time; + u32 shutdown_time; +}; + +static struct omap2_oscillator oscillator = { + .startup_time = ULONG_MAX, + .shutdown_time = ULONG_MAX, +}; + +void omap_pm_setup_oscillator(u32 tstart, u32 tshut) +{ + oscillator.startup_time = tstart; + oscillator.shutdown_time = tshut; +} + +void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) +{ + if (!tstart || !tshut) + return; + + *tstart = oscillator.startup_time; + *tshut = oscillator.shutdown_time; +} + static int __init _init_omap_device(char *name) { struct omap_hwmod *oh; diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 67d66131cfa7..429028852103 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -129,4 +129,12 @@ static inline int omap4_twl_init(void) } #endif +#ifdef CONFIG_PM +extern void omap_pm_setup_oscillator(u32 tstart, u32 tshut); +extern void omap_pm_get_oscillator(u32 *tstart, u32 *tshut); +#else +static inline void omap_pm_setup_oscillator(u32 tstart, u32 tshut) { } +static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { } +#endif + #endif -- cgit v1.2.3