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https://github.com/edk2-porting/linux-next.git
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e470d06655
Introduce generic subsystem callbacks for the new phases of device suspend/resume during system power transitions: "late suspend", "early resume", "late freeze", "early thaw", "late poweroff", "early restore". Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
330 lines
8.6 KiB
C
330 lines
8.6 KiB
C
/*
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* drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems
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*
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* Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
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*
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* This file is released under the GPLv2.
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*/
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/export.h>
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#ifdef CONFIG_PM_RUNTIME
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/**
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* pm_generic_runtime_idle - Generic runtime idle callback for subsystems.
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* @dev: Device to handle.
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*
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* If PM operations are defined for the @dev's driver and they include
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* ->runtime_idle(), execute it and return its error code, if nonzero.
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* Otherwise, execute pm_runtime_suspend() for the device and return 0.
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*/
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int pm_generic_runtime_idle(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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if (pm && pm->runtime_idle) {
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int ret = pm->runtime_idle(dev);
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if (ret)
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return ret;
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}
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pm_runtime_suspend(dev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_runtime_idle);
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/**
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* pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
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* @dev: Device to suspend.
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*
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* If PM operations are defined for the @dev's driver and they include
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* ->runtime_suspend(), execute it and return its error code. Otherwise,
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* return 0.
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*/
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int pm_generic_runtime_suspend(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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int ret;
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ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0;
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return ret;
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}
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EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend);
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/**
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* pm_generic_runtime_resume - Generic runtime resume callback for subsystems.
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* @dev: Device to resume.
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*
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* If PM operations are defined for the @dev's driver and they include
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* ->runtime_resume(), execute it and return its error code. Otherwise,
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* return 0.
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*/
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int pm_generic_runtime_resume(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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int ret;
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ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0;
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return ret;
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}
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EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
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#endif /* CONFIG_PM_RUNTIME */
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#ifdef CONFIG_PM_SLEEP
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/**
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* pm_generic_prepare - Generic routine preparing a device for power transition.
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* @dev: Device to prepare.
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*
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* Prepare a device for a system-wide power transition.
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*/
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int pm_generic_prepare(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (drv && drv->pm && drv->pm->prepare)
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ret = drv->pm->prepare(dev);
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return ret;
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}
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/**
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* pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems.
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* @dev: Device to suspend.
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*/
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int pm_generic_suspend_noirq(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq);
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/**
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* pm_generic_suspend_late - Generic suspend_late callback for subsystems.
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* @dev: Device to suspend.
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*/
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int pm_generic_suspend_late(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->suspend_late ? pm->suspend_late(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_suspend_late);
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/**
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* pm_generic_suspend - Generic suspend callback for subsystems.
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* @dev: Device to suspend.
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*/
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int pm_generic_suspend(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->suspend ? pm->suspend(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_suspend);
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/**
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* pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems.
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* @dev: Device to freeze.
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*/
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int pm_generic_freeze_noirq(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq);
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/**
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* pm_generic_freeze_late - Generic freeze_late callback for subsystems.
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* @dev: Device to freeze.
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*/
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int pm_generic_freeze_late(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->freeze_late ? pm->freeze_late(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_freeze_late);
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/**
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* pm_generic_freeze - Generic freeze callback for subsystems.
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* @dev: Device to freeze.
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*/
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int pm_generic_freeze(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->freeze ? pm->freeze(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_freeze);
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/**
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* pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems.
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* @dev: Device to handle.
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*/
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int pm_generic_poweroff_noirq(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq);
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/**
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* pm_generic_poweroff_late - Generic poweroff_late callback for subsystems.
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* @dev: Device to handle.
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*/
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int pm_generic_poweroff_late(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_poweroff_late);
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/**
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* pm_generic_poweroff - Generic poweroff callback for subsystems.
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* @dev: Device to handle.
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*/
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int pm_generic_poweroff(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->poweroff ? pm->poweroff(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_poweroff);
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/**
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* pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems.
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* @dev: Device to thaw.
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*/
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int pm_generic_thaw_noirq(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq);
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/**
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* pm_generic_thaw_early - Generic thaw_early callback for subsystems.
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* @dev: Device to thaw.
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*/
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int pm_generic_thaw_early(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->thaw_early ? pm->thaw_early(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_thaw_early);
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/**
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* pm_generic_thaw - Generic thaw callback for subsystems.
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* @dev: Device to thaw.
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*/
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int pm_generic_thaw(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->thaw ? pm->thaw(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_thaw);
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/**
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* pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
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* @dev: Device to resume.
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*/
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int pm_generic_resume_noirq(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
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/**
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* pm_generic_resume_early - Generic resume_early callback for subsystems.
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* @dev: Device to resume.
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*/
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int pm_generic_resume_early(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->resume_early ? pm->resume_early(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_resume_early);
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/**
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* pm_generic_resume - Generic resume callback for subsystems.
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* @dev: Device to resume.
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*/
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int pm_generic_resume(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->resume ? pm->resume(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_resume);
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/**
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* pm_generic_restore_noirq - Generic restore_noirq callback for subsystems.
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* @dev: Device to restore.
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*/
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int pm_generic_restore_noirq(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
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/**
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* pm_generic_restore_early - Generic restore_early callback for subsystems.
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* @dev: Device to resume.
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*/
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int pm_generic_restore_early(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->restore_early ? pm->restore_early(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_restore_early);
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/**
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* pm_generic_restore - Generic restore callback for subsystems.
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* @dev: Device to restore.
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*/
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int pm_generic_restore(struct device *dev)
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{
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const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
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return pm && pm->restore ? pm->restore(dev) : 0;
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}
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EXPORT_SYMBOL_GPL(pm_generic_restore);
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/**
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* pm_generic_complete - Generic routine competing a device power transition.
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* @dev: Device to handle.
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*
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* Complete a device power transition during a system-wide power transition.
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*/
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void pm_generic_complete(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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if (drv && drv->pm && drv->pm->complete)
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drv->pm->complete(dev);
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/*
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* Let runtime PM try to suspend devices that haven't been in use before
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* going into the system-wide sleep state we're resuming from.
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*/
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pm_runtime_idle(dev);
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}
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#endif /* CONFIG_PM_SLEEP */
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