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Commit 6f3eaec8 authored by Colin Cross's avatar Colin Cross Committed by Santosh Shilimkar
Browse files

cpu_pm: call notifiers during suspend 



Implements syscore_ops in cpu_pm to call the cpu and
cpu cluster notifiers during suspend and resume,
allowing drivers receiving the notifications to
avoid implementing syscore_ops.

Signed-off-by: default avatarColin Cross <ccross@android.com>
Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: default avatarKevin Hilman <khilman@ti.com>
Tested-and-Acked-by: default avatarShawn Guo <shawn.guo@linaro.org>
Tested-by: default avatarVishwanath BS <vishwanath.bs@ti.com>
parent ab10023e

kernel/cpu_pm.c

+33 −0
Original line number Original line Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/module.h>

#include <linux/module.h>

#include <linux/notifier.h>

#include <linux/notifier.h>

#include <linux/spinlock.h>

#include <linux/spinlock.h>

#include <linux/syscore_ops.h>





static DEFINE_RWLOCK(cpu_pm_notifier_lock);

static DEFINE_RWLOCK(cpu_pm_notifier_lock);

static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain);

static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain);
@@ -198,3 +199,35 @@ int cpu_cluster_pm_exit(void) 
	return ret;

	return ret;

}

}

EXPORT_SYMBOL_GPL(cpu_cluster_pm_exit);

EXPORT_SYMBOL_GPL(cpu_cluster_pm_exit);



#ifdef CONFIG_PM

static int cpu_pm_suspend(void)

{

	int ret;



	ret = cpu_pm_enter();

	if (ret)

		return ret;



	ret = cpu_cluster_pm_enter();

	return ret;

}



static void cpu_pm_resume(void)

{

	cpu_cluster_pm_exit();

	cpu_pm_exit();

}



static struct syscore_ops cpu_pm_syscore_ops = {

	.suspend = cpu_pm_suspend,

	.resume = cpu_pm_resume,

};



static int cpu_pm_init(void)

{

	register_syscore_ops(&cpu_pm_syscore_ops);

	return 0;

}

core_initcall(cpu_pm_init);

#endif