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Commit 9d730229 authored by Magnus Damm's avatar Magnus Damm Committed by Rafael J. Wysocki
Browse files

PM: Run-time PM platform device bus support 



This patch adds default Runtime PM callbacks to the dev_pm_ops
belonging to the platform bus. The callbacks are weak symbols
that architecture specific code can override.

Allows Runtime PM even though CONFIG_PM_SLEEP=n.

Signed-off-by: default avatarMagnus Damm <damm@igel.co.jp>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent 5e928f77

drivers/base/platform.c

+37 −9
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/bootmem.h>

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/pm_runtime.h>



#include "base.h"
@@ -656,6 +657,13 @@ static void platform_pm_complete(struct device *dev) 
		drv->pm->complete(dev);

}



#else /* !CONFIG_PM_SLEEP */



#define platform_pm_prepare		NULL

#define platform_pm_complete		NULL



#endif /* !CONFIG_PM_SLEEP */



#ifdef CONFIG_SUSPEND



static int platform_pm_suspend(struct device *dev)
@@ -886,6 +894,31 @@ static int platform_pm_restore_noirq(struct device *dev) 


#endif /* !CONFIG_HIBERNATION */



#ifdef CONFIG_PM_RUNTIME



int __weak platform_pm_runtime_suspend(struct device *dev)

{

	return -ENOSYS;

};



int __weak platform_pm_runtime_resume(struct device *dev)

{

	return -ENOSYS;

};



int __weak platform_pm_runtime_idle(struct device *dev)

{

	return -ENOSYS;

};



#else /* !CONFIG_PM_RUNTIME */



#define platform_pm_runtime_suspend NULL

#define platform_pm_runtime_resume NULL

#define platform_pm_runtime_idle NULL



#endif /* !CONFIG_PM_RUNTIME */



static const struct dev_pm_ops platform_dev_pm_ops = {

	.prepare = platform_pm_prepare,

	.complete = platform_pm_complete,
@@ -901,22 +934,17 @@ static const struct dev_pm_ops platform_dev_pm_ops = { 
	.thaw_noirq = platform_pm_thaw_noirq,

	.poweroff_noirq = platform_pm_poweroff_noirq,

	.restore_noirq = platform_pm_restore_noirq,

	.runtime_suspend = platform_pm_runtime_suspend,

	.runtime_resume = platform_pm_runtime_resume,

	.runtime_idle = platform_pm_runtime_idle,

};



#define PLATFORM_PM_OPS_PTR	(&platform_dev_pm_ops)



#else /* !CONFIG_PM_SLEEP */



#define PLATFORM_PM_OPS_PTR	NULL



#endif /* !CONFIG_PM_SLEEP */



struct bus_type platform_bus_type = {

	.name		= "platform",

	.dev_attrs	= platform_dev_attrs,

	.match		= platform_match,

	.uevent		= platform_uevent,

	.pm		= PLATFORM_PM_OPS_PTR,

	.pm		= &platform_dev_pm_ops,

};

EXPORT_SYMBOL_GPL(platform_bus_type);