Due to recent consolidation of Exynos suspend and cpuidle code, some
parts of suspend and resume sequences are executed two times, once from
exynos_pm_syscore_ops and then from exynos_cpu_pm_notifier() and thus it
breaks suspend, at least on Exynos4-based boards.
This patch fixes the issue by removing exynos_pm_syscore_ops completely
and making the code rely only on CPU PM notifier.
Tested on Exynos4210-based Trats board.
Signed-off-by: Tomasz Figa <t.f...@samsung.com>
---
arch/arm/mach-exynos/pm.c | 23 ++++-------------------
1 file changed, 4 insertions(+), 19 deletions(-)
Changes since v1:
- rebased onto Kukjin's fixes branch.
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index 202ca73..f23cc77 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -364,11 +364,6 @@ early_wakeup:
return;
}
-static struct syscore_ops exynos_pm_syscore_ops = {
- .suspend = exynos_pm_suspend,
- .resume = exynos_pm_resume,
-};
-
/*
* Suspend Ops
*/
@@ -438,22 +433,13 @@ static int exynos_cpu_pm_notifier(struct notifier_block
*self,
switch (cmd) {
case CPU_PM_ENTER:
- if (cpu == 0) {
- exynos_pm_central_suspend();
- if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9)
- exynos_cpu_save_register();
- }
+ if (cpu == 0)
+ exynos_pm_suspend();
break;
case CPU_PM_EXIT:
- if (cpu == 0) {
- if (read_cpuid_part_number() ==
- ARM_CPU_PART_CORTEX_A9) {
- scu_enable(S5P_VA_SCU);
- exynos_cpu_restore_register();
- }
- exynos_pm_central_resume();
- }
+ if (cpu == 0)
+ exynos_pm_resume();
break;
}
@@ -478,6 +464,5 @@ void __init exynos_pm_init(void)
tmp |= ((0xFF << 8) | (0x1F << 1));
__raw_writel(tmp, S5P_WAKEUP_MASK);
- register_syscore_ops(&exynos_pm_syscore_ops);
suspend_set_ops(&exynos_suspend_ops);
}
--
1.9.3
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