From ff819da44258ca12b9f60dfd589884106e5a3129 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Sat, 3 Sep 2011 22:38:27 +0530 Subject: [PATCH] ARM: OMAP3: CPUidle: Make use of CPU PM notifiers Save VFP CPU context using CPU PM notifier chain. VFP context is lost when CPU hits OFF state. Signed-off-by: Santosh Shilimkar Reviewed-by: Kevin Hilman Tested-by: Vishwanath BS Signed-off-by: Kevin Hilman --- arch/arm/mach-omap2/cpuidle34xx.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c index e20332f..1f71ebb 100644 --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -124,9 +125,23 @@ static int omap3_enter_idle(struct cpuidle_device *dev, pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle); } + /* + * Call idle CPU PM enter notifier chain so that + * VFP context is saved. + */ + if (mpu_state == PWRDM_POWER_OFF) + cpu_pm_enter(); + /* Execute ARM wfi */ omap_sram_idle(); + /* + * Call idle CPU PM enter notifier chain to restore + * VFP context. + */ + if (pwrdm_read_prev_pwrst(mpu_pd) == PWRDM_POWER_OFF) + cpu_pm_exit(); + /* Re-allow idle for C1 */ if (index == 0) { pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle); -- 2.7.4