diff options
Diffstat (limited to 'patches.tizen/1206-pm-exynos-Skip-re-enabling-L2-cache-for-early-waking.patch')
| -rw-r--r-- | patches.tizen/1206-pm-exynos-Skip-re-enabling-L2-cache-for-early-waking.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/patches.tizen/1206-pm-exynos-Skip-re-enabling-L2-cache-for-early-waking.patch b/patches.tizen/1206-pm-exynos-Skip-re-enabling-L2-cache-for-early-waking.patch new file mode 100644 index 00000000000..b47d3664a30 --- /dev/null +++ b/patches.tizen/1206-pm-exynos-Skip-re-enabling-L2-cache-for-early-waking.patch @@ -0,0 +1,58 @@ +From 04eecaa551d25b0c614c7a7fcdf9febc9aa4afcc Mon Sep 17 00:00:00 2001 +From: Jonghwa Lee <jonghwa3.lee@samsung.com> +Date: Mon, 3 Feb 2014 17:37:04 +0900 +Subject: [PATCH 1206/1302] pm: exynos: Skip re-enabling L2 cache for early + waking-up. + +If L2 cache is powered on, accessing L2 cache's control register is +forbidden. Ohterwise system will hang up. +So, when system fails to go to sleep, we have to avoid reset L2 cache +because it still be powered on. + +Change-Id: Ie0271619116012627477e332b0cd5e60a27882ff +Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> +Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> +--- + arch/arm/mach-exynos/pm.c | 12 ++++++++---- + 1 file changed, 8 insertions(+), 4 deletions(-) + +diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c +index d5bac0d..e5421fa 100644 +--- a/arch/arm/mach-exynos/pm.c ++++ b/arch/arm/mach-exynos/pm.c +@@ -273,10 +273,7 @@ static int exynos_pm_suspend(void) + static void exynos_pm_resume(void) + { + unsigned long tmp; +-#ifdef CONFIG_CACHE_L2X0 +- if (call_firmware_op(l2x0_resume) < 0) +- outer_resume(); +-#endif ++ + /* + * If PMU failed while entering sleep mode, WFI will be + * ignored by PMU and then exiting cpu_do_idle(). +@@ -292,6 +289,7 @@ static void exynos_pm_resume(void) + /* No need to perform below restore code */ + goto early_wakeup; + } ++ + if (!soc_is_exynos5250() + && call_firmware_op(c15resume, save_arm_register) == -ENOSYS) + { +@@ -330,6 +328,12 @@ static void exynos_pm_resume(void) + #ifdef CONFIG_SMP + scu_enable(S5P_VA_SCU); + #endif ++ ++#ifdef CONFIG_CACHE_L2X0 ++ if (call_firmware_op(l2x0_resume) < 0) ++ outer_resume(); ++#endif ++ + } + + early_wakeup: +-- +1.8.3.2 + |