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| author | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2011-09-03 22:38:27 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@ti.com> | 2011-12-08 11:29:02 -0800 |
| commit | ff819da44258ca12b9f60dfd589884106e5a3129 (patch) | |
| tree | d0c60e673e527085aaddd76fb512311aa6159e40 /arch/arm/mach-omap2/cpuidle34xx.c | |
| parent | 98be0dde1957a1e47d42cf2c220bf52bacf81d6e (diff) | |
| download | linux-ff819da44258ca12b9f60dfd589884106e5a3129.tar.gz linux-ff819da44258ca12b9f60dfd589884106e5a3129.tar.bz2 linux-ff819da44258ca12b9f60dfd589884106e5a3129.zip | |
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 <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/cpuidle34xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/cpuidle34xx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c index e20332f4abdc..1f71ebb6c12c 100644 --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -25,6 +25,7 @@ #include <linux/sched.h> #include <linux/cpuidle.h> #include <linux/export.h> +#include <linux/cpu_pm.h> #include <plat/prcm.h> #include <plat/irqs.h> @@ -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); |