git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 5e928f77 RW |
1 | /* |
| 2 | * pm_runtime.h - Device run-time power management helper functions. | |
| 3 | * | |
| 4 | * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl> | |
| 5 | * | |
| 6 | * This file is released under the GPLv2. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef _LINUX_PM_RUNTIME_H | |
| 10 | #define _LINUX_PM_RUNTIME_H | |
| 11 | ||
| 12 | #include <linux/device.h> | |
| 13 | #include <linux/pm.h> | |
| 14 | ||
| 15 | #ifdef CONFIG_PM_RUNTIME | |
| 16 | ||
| 17 | extern struct workqueue_struct *pm_wq; | |
| 18 | ||
| 19 | extern int pm_runtime_idle(struct device *dev); | |
| 20 | extern int pm_runtime_suspend(struct device *dev); | |
| 21 | extern int pm_runtime_resume(struct device *dev); | |
| 22 | extern int pm_request_idle(struct device *dev); | |
| 23 | extern int pm_schedule_suspend(struct device *dev, unsigned int delay); | |
| 24 | extern int pm_request_resume(struct device *dev); | |
| 25 | extern int __pm_runtime_get(struct device *dev, bool sync); | |
| 26 | extern int __pm_runtime_put(struct device *dev, bool sync); | |
| 27 | extern int __pm_runtime_set_status(struct device *dev, unsigned int status); | |
| 28 | extern int pm_runtime_barrier(struct device *dev); | |
| 29 | extern void pm_runtime_enable(struct device *dev); | |
| 30 | extern void __pm_runtime_disable(struct device *dev, bool check_resume); | |
| 31 | ||
| 32 | static inline bool pm_children_suspended(struct device *dev) | |
| 33 | { | |
| 34 | return dev->power.ignore_children | |
| 35 | || !atomic_read(&dev->power.child_count); | |
| 36 | } | |
| 37 | ||
| 38 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) | |
| 39 | { | |
| 40 | dev->power.ignore_children = enable; | |
| 41 | } | |
| 42 | ||
| 43 | static inline void pm_runtime_get_noresume(struct device *dev) | |
| 44 | { | |
| 45 | atomic_inc(&dev->power.usage_count); | |
| 46 | } | |
| 47 | ||
| 48 | static inline void pm_runtime_put_noidle(struct device *dev) | |
| 49 | { | |
| 50 | atomic_add_unless(&dev->power.usage_count, -1, 0); | |
| 51 | } | |
| 52 | ||
| 7a1a8eb5 RW |
53 | static inline bool device_run_wake(struct device *dev) |
| 54 | { | |
| 55 | return dev->power.run_wake; | |
| 56 | } | |
| 57 | ||
| 58 | static inline void device_set_run_wake(struct device *dev, bool enable) | |
| 59 | { | |
| 60 | dev->power.run_wake = enable; | |
| 61 | } | |
| 62 | ||
| 5e928f77 RW |
63 | #else /* !CONFIG_PM_RUNTIME */ |
| 64 | ||
| 65 | static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; } | |
| 66 | static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; } | |
| 67 | static inline int pm_runtime_resume(struct device *dev) { return 0; } | |
| 68 | static inline int pm_request_idle(struct device *dev) { return -ENOSYS; } | |
| 69 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) | |
| 70 | { | |
| 71 | return -ENOSYS; | |
| 72 | } | |
| 73 | static inline int pm_request_resume(struct device *dev) { return 0; } | |
| 74 | static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; } | |
| 75 | static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; } | |
| 76 | static inline int __pm_runtime_set_status(struct device *dev, | |
| 77 | unsigned int status) { return 0; } | |
| 78 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } | |
| 79 | static inline void pm_runtime_enable(struct device *dev) {} | |
| 80 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} | |
| 81 | ||
| 82 | static inline bool pm_children_suspended(struct device *dev) { return false; } | |
| 83 | static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} | |
| 84 | static inline void pm_runtime_get_noresume(struct device *dev) {} | |
| 85 | static inline void pm_runtime_put_noidle(struct device *dev) {} | |
| 7a1a8eb5 RW |
86 | static inline bool device_run_wake(struct device *dev) { return false; } |
| 87 | static inline void device_set_run_wake(struct device *dev, bool enable) {} | |
| 5e928f77 RW |
88 | |
| 89 | #endif /* !CONFIG_PM_RUNTIME */ | |
| 90 | ||
| 91 | static inline int pm_runtime_get(struct device *dev) | |
| 92 | { | |
| 93 | return __pm_runtime_get(dev, false); | |
| 94 | } | |
| 95 | ||
| 96 | static inline int pm_runtime_get_sync(struct device *dev) | |
| 97 | { | |
| 98 | return __pm_runtime_get(dev, true); | |
| 99 | } | |
| 100 | ||
| 101 | static inline int pm_runtime_put(struct device *dev) | |
| 102 | { | |
| 103 | return __pm_runtime_put(dev, false); | |
| 104 | } | |
| 105 | ||
| 106 | static inline int pm_runtime_put_sync(struct device *dev) | |
| 107 | { | |
| 108 | return __pm_runtime_put(dev, true); | |
| 109 | } | |
| 110 | ||
| 111 | static inline int pm_runtime_set_active(struct device *dev) | |
| 112 | { | |
| 113 | return __pm_runtime_set_status(dev, RPM_ACTIVE); | |
| 114 | } | |
| 115 | ||
| 116 | static inline void pm_runtime_set_suspended(struct device *dev) | |
| 117 | { | |
| 118 | __pm_runtime_set_status(dev, RPM_SUSPENDED); | |
| 119 | } | |
| 120 | ||
| 121 | static inline void pm_runtime_disable(struct device *dev) | |
| 122 | { | |
| 123 | __pm_runtime_disable(dev, true); | |
| 124 | } | |
| 125 | ||
| 126 | #endif |