[PATCH v2 5/6] ARM: EXYNOS: Fix suspend/resume sequences
From: Tomasz Figa <hidden>
Date: 2014-06-25 11:53:38
Also in:
linux-samsung-soc, lkml
Subsystem:
arm port, cpuidle driver - arm exynos, the rest · Maintainers:
Russell King, Daniel Lezcano, Kukjin Kim, Linus Torvalds
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 <redacted> --- 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