diff options
| author | Abhilash Kesavan <a.kesavan@samsung.com> | 2013-01-25 10:40:19 -0800 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2013-01-30 22:28:05 -0800 |
| commit | d3fcacf52d24ff1b12d994d9ddb7496f651294a2 (patch) | |
| tree | 551b22ecd840f7ad76d0f057de2db1d1c8be1437 /arch/arm/plat-samsung/pm.c | |
| parent | 8baaa265c5e8e378cb60164f47e24bf296a6d685 (diff) | |
ARM: SAMSUNG: Gracefully exit on suspend failure
As per the Exynos5250 User Manual:
When there are pending interrupt events, WFI/WFE instruction are
ignored. To cancel the power-down sequence follow these steps:
1) Disable system power-down using CENTRAL_SEQ_CONFIGURATION register
2) Clear WAKEUP_STAT register
3) Enable interrupt service routine for CPU
Code for early wakeup for exynos already exists. Remove the panic
on suspend failure, clear the wakeup state register and return 1
from cpu_suspend to indicate a failed suspend (to a user daemon).
Older Samsung SoCs have similar panics and I have removed them all.
Haven't touched the S3C2410 sleep code.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-samsung/pm.c')
| -rw-r--r-- | arch/arm/plat-samsung/pm.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm/plat-samsung/pm.c b/arch/arm/plat-samsung/pm.c index d896add68ad..002b1472293 100644 --- a/arch/arm/plat-samsung/pm.c +++ b/arch/arm/plat-samsung/pm.c @@ -243,6 +243,7 @@ int (*pm_cpu_sleep)(unsigned long); static int s3c_pm_enter(suspend_state_t state) { + int ret; /* ensure the debug is initialised (if enabled) */ s3c_pm_debug_init(); @@ -300,7 +301,9 @@ static int s3c_pm_enter(suspend_state_t state) * we resume as it saves its own register state and restores it * during the resume. */ - cpu_suspend(0, pm_cpu_sleep); + ret = cpu_suspend(0, pm_cpu_sleep); + if (ret) + return ret; /* restore the system state */ |