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Diffstat (limited to 'arch/arm/mach-tegra/cpuidle-tegra114.c')
-rw-r--r--arch/arm/mach-tegra/cpuidle-tegra114.c51
1 files changed, 50 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c
index 1d1c6023f4a2..e0b87300243d 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra114.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra114.c
@@ -17,15 +17,64 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
+#include <linux/clockchips.h>
#include <asm/cpuidle.h>
+#include <asm/suspend.h>
+#include <asm/smp_plat.h>
+
+#include "pm.h"
+#include "sleep.h"
+
+#ifdef CONFIG_PM_SLEEP
+#define TEGRA114_MAX_STATES 2
+#else
+#define TEGRA114_MAX_STATES 1
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra114_idle_power_down(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ local_fiq_disable();
+
+ tegra_set_cpu_in_lp2();
+ cpu_pm_enter();
+
+ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);
+
+ cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
+
+ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);
+
+ cpu_pm_exit();
+ tegra_clear_cpu_in_lp2();
+
+ local_fiq_enable();
+
+ return index;
+}
+#endif
static struct cpuidle_driver tegra_idle_driver = {
.name = "tegra_idle",
.owner = THIS_MODULE,
- .state_count = 1,
+ .state_count = TEGRA114_MAX_STATES,
.states = {
[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
+#ifdef CONFIG_PM_SLEEP
+ [1] = {
+ .enter = tegra114_idle_power_down,
+ .exit_latency = 500,
+ .target_residency = 1000,
+ .power_usage = 0,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "powered-down",
+ .desc = "CPU power gated",
+ },
+#endif
},
};