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linux/drivers/base/power/generic_ops.c
Ulf Hansson af93933974 PM / Runtime: Asyncronous idle|suspend devices at system resume 
Use the asyncronous runtime PM API when returning the runtime
reference for the device after the system resume is completed.

By using the asyncronous runtime PM API we don't have to wait
for each an every device to become idle|suspended. Instead we
can move on and handle the next device in queue.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-04-12 13:34:57 +02:00

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8.6 KiB
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/*
* drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems
*
* Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
*
* This file is released under the GPLv2.
*/
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/export.h>
#ifdef CONFIG_PM_RUNTIME
/**
* pm_generic_runtime_idle - Generic runtime idle callback for subsystems.
* @dev: Device to handle.
*
* If PM operations are defined for the @dev's driver and they include
* ->runtime_idle(), execute it and return its error code, if nonzero.
* Otherwise, execute pm_runtime_suspend() for the device and return 0.
*/
int pm_generic_runtime_idle(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (pm && pm->runtime_idle) {
int ret = pm->runtime_idle(dev);
if (ret)
return ret;
}
pm_runtime_suspend(dev);
return 0;
}
EXPORT_SYMBOL_GPL(pm_generic_runtime_idle);
/**
* pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
* @dev: Device to suspend.
*
* If PM operations are defined for the @dev's driver and they include
* ->runtime_suspend(), execute it and return its error code. Otherwise,
* return 0.
*/
int pm_generic_runtime_suspend(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int ret;
ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0;
return ret;
}
EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend);
/**
* pm_generic_runtime_resume - Generic runtime resume callback for subsystems.
* @dev: Device to resume.
*
* If PM operations are defined for the @dev's driver and they include
* ->runtime_resume(), execute it and return its error code. Otherwise,
* return 0.
*/
int pm_generic_runtime_resume(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int ret;
ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0;
return ret;
}
EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
#endif /* CONFIG_PM_RUNTIME */
#ifdef CONFIG_PM_SLEEP
/**
* pm_generic_prepare - Generic routine preparing a device for power transition.
* @dev: Device to prepare.
*
* Prepare a device for a system-wide power transition.
*/
int pm_generic_prepare(struct device *dev)
{
struct device_driver *drv = dev->driver;
int ret = 0;
if (drv && drv->pm && drv->pm->prepare)
ret = drv->pm->prepare(dev);
return ret;
}
/**
* pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems.
* @dev: Device to suspend.
*/
int pm_generic_suspend_noirq(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq);
/**
* pm_generic_suspend_late - Generic suspend_late callback for subsystems.
* @dev: Device to suspend.
*/
int pm_generic_suspend_late(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->suspend_late ? pm->suspend_late(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_suspend_late);
/**
* pm_generic_suspend - Generic suspend callback for subsystems.
* @dev: Device to suspend.
*/
int pm_generic_suspend(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->suspend ? pm->suspend(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_suspend);
/**
* pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems.
* @dev: Device to freeze.
*/
int pm_generic_freeze_noirq(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq);
/**
* pm_generic_freeze_late - Generic freeze_late callback for subsystems.
* @dev: Device to freeze.
*/
int pm_generic_freeze_late(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->freeze_late ? pm->freeze_late(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_freeze_late);
/**
* pm_generic_freeze - Generic freeze callback for subsystems.
* @dev: Device to freeze.
*/
int pm_generic_freeze(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->freeze ? pm->freeze(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_freeze);
/**
* pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems.
* @dev: Device to handle.
*/
int pm_generic_poweroff_noirq(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq);
/**
* pm_generic_poweroff_late - Generic poweroff_late callback for subsystems.
* @dev: Device to handle.
*/
int pm_generic_poweroff_late(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_poweroff_late);
/**
* pm_generic_poweroff - Generic poweroff callback for subsystems.
* @dev: Device to handle.
*/
int pm_generic_poweroff(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->poweroff ? pm->poweroff(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_poweroff);
/**
* pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems.
* @dev: Device to thaw.
*/
int pm_generic_thaw_noirq(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq);
/**
* pm_generic_thaw_early - Generic thaw_early callback for subsystems.
* @dev: Device to thaw.
*/
int pm_generic_thaw_early(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->thaw_early ? pm->thaw_early(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_thaw_early);
/**
* pm_generic_thaw - Generic thaw callback for subsystems.
* @dev: Device to thaw.
*/
int pm_generic_thaw(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->thaw ? pm->thaw(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_thaw);
/**
* pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
* @dev: Device to resume.
*/
int pm_generic_resume_noirq(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
/**
* pm_generic_resume_early - Generic resume_early callback for subsystems.
* @dev: Device to resume.
*/
int pm_generic_resume_early(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->resume_early ? pm->resume_early(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_resume_early);
/**
* pm_generic_resume - Generic resume callback for subsystems.
* @dev: Device to resume.
*/
int pm_generic_resume(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->resume ? pm->resume(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_resume);
/**
* pm_generic_restore_noirq - Generic restore_noirq callback for subsystems.
* @dev: Device to restore.
*/
int pm_generic_restore_noirq(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
/**
* pm_generic_restore_early - Generic restore_early callback for subsystems.
* @dev: Device to resume.
*/
int pm_generic_restore_early(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->restore_early ? pm->restore_early(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_restore_early);
/**
* pm_generic_restore - Generic restore callback for subsystems.
* @dev: Device to restore.
*/
int pm_generic_restore(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
return pm && pm->restore ? pm->restore(dev) : 0;
}
EXPORT_SYMBOL_GPL(pm_generic_restore);
/**
* pm_generic_complete - Generic routine competing a device power transition.
* @dev: Device to handle.
*
* Complete a device power transition during a system-wide power transition.
*/
void pm_generic_complete(struct device *dev)
{
struct device_driver *drv = dev->driver;
if (drv && drv->pm && drv->pm->complete)
drv->pm->complete(dev);
/*
* Let runtime PM try to suspend devices that haven't been in use before
* going into the system-wide sleep state we're resuming from.
*/
pm_request_idle(dev);
}
#endif /* CONFIG_PM_SLEEP */
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