diff options
| -rw-r--r-- | arch/arm/mach-exynos4/pm.c | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/arch/arm/mach-exynos4/pm.c b/arch/arm/mach-exynos4/pm.c index a073a0156daa..1ff290f73837 100644 --- a/arch/arm/mach-exynos4/pm.c +++ b/arch/arm/mach-exynos4/pm.c @@ -210,7 +210,6 @@ static struct sleep_save exynos4_l2cc_save[] = { void exynos4_cpu_suspend(void) { unsigned long tmp; - unsigned long mask = 0xFFFFFFFF; /* Setting Central Sequence Register for power down mode */ @@ -218,26 +217,6 @@ void exynos4_cpu_suspend(void) tmp &= ~(S5P_CENTRAL_LOWPWR_CFG); __raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION); - /* Setting Central Sequence option Register */ - - tmp = __raw_readl(S5P_CENTRAL_SEQ_OPTION); - tmp &= ~(S5P_USE_MASK); - tmp |= S5P_USE_STANDBY_WFI0; - __raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION); - - /* Clear all interrupt pending to avoid early wakeup */ - - __raw_writel(mask, (S5P_VA_GIC_DIST + 0x280)); - __raw_writel(mask, (S5P_VA_GIC_DIST + 0x284)); - __raw_writel(mask, (S5P_VA_GIC_DIST + 0x288)); - - /* Disable all interrupt */ - - __raw_writel(0x0, (S5P_VA_GIC_CPU + 0x000)); - __raw_writel(0x0, (S5P_VA_GIC_DIST + 0x000)); - __raw_writel(mask, (S5P_VA_GIC_DIST + 0x184)); - __raw_writel(mask, (S5P_VA_GIC_DIST + 0x188)); - outer_flush_all(); /* issue the standby signal into the pm unit. */ @@ -322,6 +301,22 @@ arch_initcall(exynos4_pm_drvinit); static void exynos4_pm_resume(void) { + unsigned long tmp; + + /* + * If PMU failed while entering sleep mode, WFI will be + * ignored by PMU and then exiting cpu_do_idle(). + * S5P_CENTRAL_LOWPWR_CFG bit will not be set automatically + * in this situation. + */ + tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); + if (!(tmp & S5P_CENTRAL_LOWPWR_CFG)) { + tmp |= S5P_CENTRAL_LOWPWR_CFG; + __raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION); + /* No need to perform below restore code */ + goto early_wakeup; + } + /* For release retention */ __raw_writel((1 << 28), S5P_PAD_RET_MAUDIO_OPTION); @@ -342,6 +337,9 @@ static void exynos4_pm_resume(void) /* enable L2X0*/ writel_relaxed(1, S5P_VA_L2CC + L2X0_CTRL); #endif + +early_wakeup: + return; } static struct syscore_ops exynos4_pm_syscore_ops = { |