diff options
| author | Todd Poynor <tpoynor@mvista.com> | 2005-07-01 11:27:05 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-07-01 11:27:05 +0100 |
| commit | 26705ca46bdf81113cc6729eb12b9eee2263bbfc (patch) | |
| tree | f49950ea17fbdec406404144ee264fa3c6ad5c61 /arch/arm/mach-pxa/pxa27x.c | |
| parent | 62351cc38d3eaf3de0327054dd6ebc039f4da80d (diff) | |
| download | kernel_samsung_smdk4412-26705ca46bdf81113cc6729eb12b9eee2263bbfc.tar.gz kernel_samsung_smdk4412-26705ca46bdf81113cc6729eb12b9eee2263bbfc.tar.bz2 kernel_samsung_smdk4412-26705ca46bdf81113cc6729eb12b9eee2263bbfc.zip | |
[PATCH] ARM: 2781/2: PXA27x Standby mode take 2
Patch from Todd Poynor
Add support for PXA27x Standby mode, a low-power mode that retains CPU
and some peripheral state (the existing "sleep" mode is a power-power
mode that retains less state). Activated via:
echo -n standby > /sys/power/state
From: David Burrage and Todd Poynor
Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/pxa27x.c')
| -rw-r--r-- | arch/arm/mach-pxa/pxa27x.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index 893964fb965..9a791b07118 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -126,6 +126,7 @@ int pxa_cpu_pm_prepare(suspend_state_t state) { switch (state) { case PM_SUSPEND_MEM: + case PM_SUSPEND_STANDBY: return 0; default: return -EINVAL; @@ -138,7 +139,10 @@ void pxa_cpu_pm_enter(suspend_state_t state) extern void pxa_cpu_suspend(unsigned int); extern void pxa_cpu_resume(void); - CKEN = CKEN22_MEMC | CKEN9_OSTIMER; + if (state == PM_SUSPEND_STANDBY) + CKEN = CKEN22_MEMC | CKEN9_OSTIMER | CKEN16_LCD |CKEN0_PWM0; + else + CKEN = CKEN22_MEMC | CKEN9_OSTIMER; /* ensure voltage-change sequencer not initiated, which hangs */ PCFR &= ~PCFR_FVC; @@ -147,6 +151,9 @@ void pxa_cpu_pm_enter(suspend_state_t state) PEDR = 0xDF12FE1B; switch (state) { + case PM_SUSPEND_STANDBY: + pxa_cpu_standby(); + break; case PM_SUSPEND_MEM: /* set resume return address */ PSPR = virt_to_phys(pxa_cpu_resume); |