/* * pm_runtime.h - Device run-time power management helper functions. * * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl> * * This file is released under the GPLv2. */ #ifndef _LINUX_PM_RUNTIME_H #define _LINUX_PM_RUNTIME_H #include <linux/device.h> #include <linux/pm.h> #ifdef CONFIG_PM_RUNTIME extern struct workqueue_struct *pm_wq; extern int pm_runtime_idle(struct device *dev); extern int pm_runtime_suspend(struct device *dev); extern int pm_runtime_resume(struct device *dev); extern int pm_request_idle(struct device *dev); extern int pm_schedule_suspend(struct device *dev, unsigned int delay); extern int pm_request_resume(struct device *dev); extern int __pm_runtime_get(struct device *dev, bool sync); extern int __pm_runtime_put(struct device *dev, bool sync); extern int __pm_runtime_set_status(struct device *dev, unsigned int status); extern int pm_runtime_barrier(struct device *dev); extern void pm_runtime_enable(struct device *dev); extern void __pm_runtime_disable(struct device *dev, bool check_resume); static inline bool pm_children_suspended(struct device *dev) { return dev->power.ignore_children || !atomic_read(&dev->power.child_count); } static inline void pm_suspend_ignore_children(struct device *dev, bool enable) { dev->power.ignore_children = enable; } static inline void pm_runtime_get_noresume(struct device *dev) { atomic_inc(&dev->power.usage_count); } static inline void pm_runtime_put_noidle(struct device *dev) { atomic_add_unless(&dev->power.usage_count, -1, 0); } #else /* !CONFIG_PM_RUNTIME */ static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; } static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; } static inline int pm_runtime_resume(struct device *dev) { return 0; } static inline int pm_request_idle(struct device *dev) { return -ENOSYS; } static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) { return -ENOSYS; } static inline int pm_request_resume(struct device *dev) { return 0; } static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; } static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; } static inline int __pm_runtime_set_status(struct device *dev, unsigned int status) { return 0; } static inline int pm_runtime_barrier(struct device *dev) { return 0; } static inline void pm_runtime_enable(struct device *dev) {} static inline void __pm_runtime_disable(struct device *dev, bool c) {} static inline bool pm_children_suspended(struct device *dev) { return false; } static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} static inline void pm_runtime_get_noresume(struct device *dev) {} static inline void pm_runtime_put_noidle(struct device *dev) {} #endif /* !CONFIG_PM_RUNTIME */ static inline int pm_runtime_get(struct device *dev) { return __pm_runtime_get(dev, false); } static inline int pm_runtime_get_sync(struct device *dev) { return __pm_runtime_get(dev, true); } static inline int pm_runtime_put(struct device *dev) { return __pm_runtime_put(dev, false); } static inline int pm_runtime_put_sync(struct device *dev) { return __pm_runtime_put(dev, true); } static inline int pm_runtime_set_active(struct device *dev) { return __pm_runtime_set_status(dev, RPM_ACTIVE); } static inline void pm_runtime_set_suspended(struct device *dev) { __pm_runtime_set_status(dev, RPM_SUSPENDED); } static inline void pm_runtime_disable(struct device *dev) { __pm_runtime_disable(dev, true); } #endif