Notify runtime PM when the CPU is going to be powered off in the idle
state. This allows for runtime PM suspend/resume of the CPU as well as
its PM domain.
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
---
drivers/cpuidle/cpuidle-arm.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c
index 545069d..8e72a23 100644
--- a/drivers/cpuidle/cpuidle-arm.c
+++ b/drivers/cpuidle/cpuidle-arm.c
@@ -11,13 +11,16 @@
#define pr_fmt(fmt) "CPUidle arm: " fmt
+#include <linux/cpu.h>
#include <linux/cpuidle.h>
#include <linux/cpumask.h>
#include <linux/cpu_pm.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/pm_runtime.h>
#include <linux/slab.h>
+#include <linux/rcupdate.h>
#include <asm/cpuidle.h>
@@ -45,6 +48,10 @@ static int arm_enter_idle_state(struct cpuidle_device *dev,
ret = cpu_pm_enter();
if (!ret) {
+ struct device *cpu_dev = get_cpu_device(dev->cpu);
+
+ RCU_NONIDLE(pm_runtime_put_sync_suspend(cpu_dev));
+
/*
* Pass idle state index to cpu_suspend which in turn will
* call the CPU ops suspend protocol with idle index as a
@@ -52,6 +59,7 @@ static int arm_enter_idle_state(struct cpuidle_device *dev,
*/
arm_cpuidle_suspend(idx);
+ RCU_NONIDLE(pm_runtime_get_sync(cpu_dev));
cpu_pm_exit();
}
--
2.1.4
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