aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-exynos/cpuidle.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-exynos/cpuidle.c')
-rw-r--r--arch/arm/mach-exynos/cpuidle.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
index cff0595..0509241 100644
--- a/arch/arm/mach-exynos/cpuidle.c
+++ b/arch/arm/mach-exynos/cpuidle.c
@@ -21,6 +21,7 @@
#include <asm/suspend.h>
#include <asm/unified.h>
#include <asm/cpuidle.h>
+#include <mach/regs-clock.h>
#include <mach/regs-pmu.h>
#include <mach/pmu.h>
@@ -116,7 +117,8 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev,
cpu_suspend(0, idle_finisher);
#ifdef CONFIG_SMP
- scu_enable(S5P_VA_SCU);
+ if (!soc_is_exynos5250())
+ scu_enable(S5P_VA_SCU);
#endif
cpu_pm_exit();
@@ -156,12 +158,47 @@ static int exynos4_enter_lowpower(struct cpuidle_device *dev,
return exynos4_enter_core0_aftr(dev, drv, new_index);
}
+static void __init exynos5_core_down_clk(void)
+{
+ unsigned int tmp;
+
+ /*
+ * Enable arm clock down (in idle) and set arm divider
+ * ratios in WFI/WFE state.
+ */
+ tmp = PWR_CTRL1_CORE2_DOWN_RATIO | \
+ PWR_CTRL1_CORE1_DOWN_RATIO | \
+ PWR_CTRL1_DIV2_DOWN_EN | \
+ PWR_CTRL1_DIV1_DOWN_EN | \
+ PWR_CTRL1_USE_CORE1_WFE | \
+ PWR_CTRL1_USE_CORE0_WFE | \
+ PWR_CTRL1_USE_CORE1_WFI | \
+ PWR_CTRL1_USE_CORE0_WFI;
+ __raw_writel(tmp, EXYNOS5_PWR_CTRL1);
+
+ /*
+ * Enable arm clock up (on exiting idle). Set arm divider
+ * ratios when not in idle along with the standby duration
+ * ratios.
+ */
+ tmp = PWR_CTRL2_DIV2_UP_EN | \
+ PWR_CTRL2_DIV1_UP_EN | \
+ PWR_CTRL2_DUR_STANDBY2_VAL | \
+ PWR_CTRL2_DUR_STANDBY1_VAL | \
+ PWR_CTRL2_CORE2_UP_RATIO | \
+ PWR_CTRL2_CORE1_UP_RATIO;
+ __raw_writel(tmp, EXYNOS5_PWR_CTRL2);
+}
+
static int __init exynos4_init_cpuidle(void)
{
int i, max_cpuidle_state, cpu_id;
struct cpuidle_device *device;
struct cpuidle_driver *drv = &exynos4_idle_driver;
+ if (soc_is_exynos5250())
+ exynos5_core_down_clk();
+
/* Setup cpuidle driver */
drv->state_count = (sizeof(exynos4_cpuidle_set) /
sizeof(struct cpuidle_state));