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authorAbhilash Kesavan <a.kesavan@samsung.com>2013-01-25 10:40:19 -0800
committerKukjin Kim <kgene.kim@samsung.com>2013-01-30 22:28:05 -0800
commitd3fcacf52d24ff1b12d994d9ddb7496f651294a2 (patch)
tree551b22ecd840f7ad76d0f057de2db1d1c8be1437 /arch
parent8baaa265c5e8e378cb60164f47e24bf296a6d685 (diff)
downloadlinux-d3fcacf52d24ff1b12d994d9ddb7496f651294a2.tar.bz2
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')
-rw-r--r--arch/arm/mach-exynos/pm.c6
-rw-r--r--arch/arm/mach-s3c24xx/pm-s3c2412.c3
-rw-r--r--arch/arm/mach-s3c24xx/pm-s3c2416.c3
-rw-r--r--arch/arm/mach-s3c64xx/pm.c3
-rw-r--r--arch/arm/mach-s5p64x0/pm.c4
-rw-r--r--arch/arm/mach-s5pv210/pm.c4
-rw-r--r--arch/arm/plat-samsung/pm.c5
7 files changed, 18 insertions, 10 deletions
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index b9b539cac81e..5106ab83e593 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -91,8 +91,8 @@ static int exynos_cpu_suspend(unsigned long arg)
/* issue the standby signal into the pm unit. */
cpu_do_idle();
- /* we should never get past here */
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
static void exynos_pm_prepare(void)
@@ -282,6 +282,8 @@ static void exynos_pm_resume(void)
if (!(tmp & S5P_CENTRAL_LOWPWR_CFG)) {
tmp |= S5P_CENTRAL_LOWPWR_CFG;
__raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
+ /* clear the wakeup state register */
+ __raw_writel(0x0, S5P_WAKEUP_STAT);
/* No need to perform below restore code */
goto early_wakeup;
}
diff --git a/arch/arm/mach-s3c24xx/pm-s3c2412.c b/arch/arm/mach-s3c24xx/pm-s3c2412.c
index c60f67a75aff..f5dc2b254a5a 100644
--- a/arch/arm/mach-s3c24xx/pm-s3c2412.c
+++ b/arch/arm/mach-s3c24xx/pm-s3c2412.c
@@ -48,7 +48,8 @@ static int s3c2412_cpu_suspend(unsigned long arg)
s3c2412_sleep_enter();
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
static void s3c2412_pm_prepare(void)
diff --git a/arch/arm/mach-s3c24xx/pm-s3c2416.c b/arch/arm/mach-s3c24xx/pm-s3c2416.c
index 1bd4817b8eb8..1a9e8dd194ff 100644
--- a/arch/arm/mach-s3c24xx/pm-s3c2416.c
+++ b/arch/arm/mach-s3c24xx/pm-s3c2416.c
@@ -34,7 +34,8 @@ static int s3c2416_cpu_suspend(unsigned long arg)
s3c2412_sleep_enter();
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
static void s3c2416_pm_prepare(void)
diff --git a/arch/arm/mach-s3c64xx/pm.c b/arch/arm/mach-s3c64xx/pm.c
index 7feb426fc202..54d48b857f70 100644
--- a/arch/arm/mach-s3c64xx/pm.c
+++ b/arch/arm/mach-s3c64xx/pm.c
@@ -296,7 +296,8 @@ static int s3c64xx_cpu_suspend(unsigned long arg)
/* we should never get past here */
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
/* mapping of interrupts to parts of the wakeup mask */
diff --git a/arch/arm/mach-s5p64x0/pm.c b/arch/arm/mach-s5p64x0/pm.c
index 9cba18bfe47b..97c2a08ad490 100644
--- a/arch/arm/mach-s5p64x0/pm.c
+++ b/arch/arm/mach-s5p64x0/pm.c
@@ -103,8 +103,8 @@ static int s5p64x0_cpu_suspend(unsigned long arg)
"mcr p15, 0, %0, c7, c10, 4\n\t"
"mcr p15, 0, %0, c7, c0, 4" : : "r" (tmp));
- /* we should never get past here */
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
/* mapping of interrupts to parts of the wakeup mask */
diff --git a/arch/arm/mach-s5pv210/pm.c b/arch/arm/mach-s5pv210/pm.c
index 736bfb103cbc..2b68a67b6e95 100644
--- a/arch/arm/mach-s5pv210/pm.c
+++ b/arch/arm/mach-s5pv210/pm.c
@@ -104,8 +104,8 @@ static int s5pv210_cpu_suspend(unsigned long arg)
"mcr p15, 0, %0, c7, c10, 4\n\t"
"wfi" : : "r" (tmp));
- /* we should never get past here */
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
static void s5pv210_pm_prepare(void)
diff --git a/arch/arm/plat-samsung/pm.c b/arch/arm/plat-samsung/pm.c
index d896add68ad3..002b1472293b 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 */