diff options
Diffstat (limited to 'drivers/base/power/generic_ops.c')
| -rw-r--r-- | drivers/base/power/generic_ops.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c new file mode 100644 index 00000000..d03d290f --- /dev/null +++ b/drivers/base/power/generic_ops.c @@ -0,0 +1,329 @@ +/* + * 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_runtime_idle(dev); +} +#endif /* CONFIG_PM_SLEEP */ |