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| Rev | Author | Line No. | Line |
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| 6082 | serge | 1 | /* |
| 2 | * pm_runtime.h - Device run-time power management helper functions. |
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| 3 | * |
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| 4 | * Copyright (C) 2009 Rafael J. Wysocki |
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| 5 | * |
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| 6 | * This file is released under the GPLv2. |
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| 7 | */ |
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| 8 | |||
| 9 | #ifndef _LINUX_PM_RUNTIME_H |
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| 10 | #define _LINUX_PM_RUNTIME_H |
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| 11 | |||
| 12 | #include |
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| 13 | #include |
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| 14 | |||
| 15 | #include |
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| 16 | |||
| 17 | /* Runtime PM flag argument bits */ |
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| 18 | #define RPM_ASYNC 0x01 /* Request is asynchronous */ |
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| 19 | #define RPM_NOWAIT 0x02 /* Don't wait for concurrent |
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| 20 | state change */ |
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| 21 | #define RPM_GET_PUT 0x04 /* Increment/decrement the |
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| 22 | usage_count */ |
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| 23 | #define RPM_AUTO 0x08 /* Use autosuspend_delay */ |
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| 24 | |||
| 25 | #ifdef CONFIG_PM |
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| 26 | extern struct workqueue_struct *pm_wq; |
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| 27 | |||
| 28 | static inline bool queue_pm_work(struct work_struct *work) |
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| 29 | { |
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| 30 | return queue_work(pm_wq, work); |
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| 31 | } |
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| 32 | |||
| 33 | extern int pm_generic_runtime_suspend(struct device *dev); |
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| 34 | extern int pm_generic_runtime_resume(struct device *dev); |
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| 35 | extern int pm_runtime_force_suspend(struct device *dev); |
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| 36 | extern int pm_runtime_force_resume(struct device *dev); |
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| 37 | |||
| 38 | extern int __pm_runtime_idle(struct device *dev, int rpmflags); |
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| 39 | extern int __pm_runtime_suspend(struct device *dev, int rpmflags); |
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| 40 | extern int __pm_runtime_resume(struct device *dev, int rpmflags); |
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| 41 | extern int pm_schedule_suspend(struct device *dev, unsigned int delay); |
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| 42 | extern int __pm_runtime_set_status(struct device *dev, unsigned int status); |
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| 43 | extern int pm_runtime_barrier(struct device *dev); |
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| 44 | extern void pm_runtime_enable(struct device *dev); |
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| 45 | extern void __pm_runtime_disable(struct device *dev, bool check_resume); |
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| 46 | extern void pm_runtime_allow(struct device *dev); |
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| 47 | extern void pm_runtime_forbid(struct device *dev); |
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| 48 | extern void pm_runtime_no_callbacks(struct device *dev); |
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| 49 | extern void pm_runtime_irq_safe(struct device *dev); |
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| 50 | extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); |
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| 51 | extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); |
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| 52 | extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); |
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| 53 | extern void pm_runtime_update_max_time_suspended(struct device *dev, |
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| 54 | s64 delta_ns); |
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| 55 | extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable); |
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| 56 | |||
| 57 | static inline bool pm_children_suspended(struct device *dev) |
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| 58 | { |
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| 59 | return dev->power.ignore_children |
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| 60 | || !atomic_read(&dev->power.child_count); |
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| 61 | } |
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| 62 | |||
| 63 | static inline void pm_runtime_get_noresume(struct device *dev) |
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| 64 | { |
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| 65 | atomic_inc(&dev->power.usage_count); |
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| 66 | } |
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| 67 | |||
| 68 | static inline void pm_runtime_put_noidle(struct device *dev) |
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| 69 | { |
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| 70 | atomic_add_unless(&dev->power.usage_count, -1, 0); |
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| 71 | } |
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| 72 | |||
| 73 | static inline bool device_run_wake(struct device *dev) |
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| 74 | { |
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| 75 | return dev->power.run_wake; |
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| 76 | } |
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| 77 | |||
| 78 | static inline void device_set_run_wake(struct device *dev, bool enable) |
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| 79 | { |
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| 80 | dev->power.run_wake = enable; |
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| 81 | } |
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| 82 | |||
| 83 | static inline bool pm_runtime_suspended(struct device *dev) |
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| 84 | { |
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| 85 | return dev->power.runtime_status == RPM_SUSPENDED |
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| 86 | && !dev->power.disable_depth; |
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| 87 | } |
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| 88 | |||
| 89 | static inline bool pm_runtime_active(struct device *dev) |
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| 90 | { |
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| 91 | return dev->power.runtime_status == RPM_ACTIVE |
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| 92 | || dev->power.disable_depth; |
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| 93 | } |
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| 94 | |||
| 95 | static inline bool pm_runtime_status_suspended(struct device *dev) |
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| 96 | { |
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| 97 | return dev->power.runtime_status == RPM_SUSPENDED; |
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| 98 | } |
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| 99 | |||
| 100 | static inline bool pm_runtime_enabled(struct device *dev) |
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| 101 | { |
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| 102 | return !dev->power.disable_depth; |
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| 103 | } |
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| 104 | |||
| 105 | static inline bool pm_runtime_callbacks_present(struct device *dev) |
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| 106 | { |
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| 107 | return !dev->power.no_callbacks; |
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| 108 | } |
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| 109 | |||
| 110 | static inline void pm_runtime_mark_last_busy(struct device *dev) |
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| 111 | { |
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| 112 | ACCESS_ONCE(dev->power.last_busy) = jiffies; |
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| 113 | } |
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| 114 | |||
| 115 | static inline bool pm_runtime_is_irq_safe(struct device *dev) |
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| 116 | { |
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| 117 | return dev->power.irq_safe; |
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| 118 | } |
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| 119 | |||
| 120 | #else /* !CONFIG_PM */ |
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| 121 | |||
| 122 | static inline bool queue_pm_work(struct work_struct *work) { return false; } |
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| 123 | |||
| 124 | static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } |
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| 125 | static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } |
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| 126 | static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } |
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| 127 | static inline int pm_runtime_force_resume(struct device *dev) { return 0; } |
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| 128 | |||
| 129 | static inline int __pm_runtime_idle(struct device *dev, int rpmflags) |
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| 130 | { |
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| 131 | return -ENOSYS; |
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| 132 | } |
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| 133 | static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) |
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| 134 | { |
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| 135 | return -ENOSYS; |
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| 136 | } |
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| 137 | static inline int __pm_runtime_resume(struct device *dev, int rpmflags) |
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| 138 | { |
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| 139 | return 1; |
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| 140 | } |
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| 141 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) |
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| 142 | { |
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| 143 | return -ENOSYS; |
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| 144 | } |
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| 145 | static inline int __pm_runtime_set_status(struct device *dev, |
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| 146 | unsigned int status) { return 0; } |
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| 147 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } |
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| 148 | static inline void pm_runtime_enable(struct device *dev) {} |
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| 149 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} |
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| 150 | static inline void pm_runtime_allow(struct device *dev) {} |
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| 151 | static inline void pm_runtime_forbid(struct device *dev) {} |
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| 152 | |||
| 153 | static inline bool pm_children_suspended(struct device *dev) { return false; } |
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| 154 | static inline void pm_runtime_get_noresume(struct device *dev) {} |
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| 155 | static inline void pm_runtime_put_noidle(struct device *dev) {} |
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| 156 | static inline bool device_run_wake(struct device *dev) { return false; } |
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| 157 | static inline void device_set_run_wake(struct device *dev, bool enable) {} |
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| 158 | static inline bool pm_runtime_suspended(struct device *dev) { return false; } |
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| 159 | static inline bool pm_runtime_active(struct device *dev) { return true; } |
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| 160 | static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } |
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| 161 | static inline bool pm_runtime_enabled(struct device *dev) { return false; } |
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| 162 | |||
| 163 | static inline void pm_runtime_no_callbacks(struct device *dev) {} |
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| 164 | static inline void pm_runtime_irq_safe(struct device *dev) {} |
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| 165 | static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } |
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| 166 | |||
| 167 | static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } |
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| 168 | static inline void pm_runtime_mark_last_busy(struct device *dev) {} |
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| 169 | static inline void __pm_runtime_use_autosuspend(struct device *dev, |
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| 170 | bool use) {} |
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| 171 | static inline void pm_runtime_set_autosuspend_delay(struct device *dev, |
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| 172 | int delay) {} |
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| 173 | static inline unsigned long pm_runtime_autosuspend_expiration( |
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| 174 | struct device *dev) { return 0; } |
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| 175 | static inline void pm_runtime_set_memalloc_noio(struct device *dev, |
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| 176 | bool enable){} |
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| 177 | |||
| 178 | #endif /* !CONFIG_PM */ |
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| 179 | |||
| 180 | static inline int pm_runtime_idle(struct device *dev) |
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| 181 | { |
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| 182 | return __pm_runtime_idle(dev, 0); |
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| 183 | } |
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| 184 | |||
| 185 | static inline int pm_runtime_suspend(struct device *dev) |
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| 186 | { |
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| 187 | return __pm_runtime_suspend(dev, 0); |
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| 188 | } |
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| 189 | |||
| 190 | static inline int pm_runtime_autosuspend(struct device *dev) |
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| 191 | { |
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| 192 | return __pm_runtime_suspend(dev, RPM_AUTO); |
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| 193 | } |
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| 194 | |||
| 195 | static inline int pm_runtime_resume(struct device *dev) |
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| 196 | { |
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| 197 | return __pm_runtime_resume(dev, 0); |
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| 198 | } |
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| 199 | |||
| 200 | static inline int pm_request_idle(struct device *dev) |
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| 201 | { |
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| 202 | return __pm_runtime_idle(dev, RPM_ASYNC); |
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| 203 | } |
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| 204 | |||
| 205 | static inline int pm_request_resume(struct device *dev) |
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| 206 | { |
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| 207 | return __pm_runtime_resume(dev, RPM_ASYNC); |
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| 208 | } |
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| 209 | |||
| 210 | static inline int pm_request_autosuspend(struct device *dev) |
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| 211 | { |
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| 212 | return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); |
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| 213 | } |
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| 214 | |||
| 215 | static inline int pm_runtime_get(struct device *dev) |
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| 216 | { |
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| 217 | return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); |
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| 218 | } |
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| 219 | |||
| 220 | static inline int pm_runtime_get_sync(struct device *dev) |
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| 221 | { |
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| 222 | return __pm_runtime_resume(dev, RPM_GET_PUT); |
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| 223 | } |
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| 224 | |||
| 225 | static inline int pm_runtime_put(struct device *dev) |
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| 226 | { |
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| 227 | return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); |
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| 228 | } |
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| 229 | |||
| 230 | static inline int pm_runtime_put_autosuspend(struct device *dev) |
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| 231 | { |
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| 232 | return __pm_runtime_suspend(dev, |
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| 233 | RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); |
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| 234 | } |
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| 235 | |||
| 236 | static inline int pm_runtime_put_sync(struct device *dev) |
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| 237 | { |
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| 238 | return __pm_runtime_idle(dev, RPM_GET_PUT); |
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| 239 | } |
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| 240 | |||
| 241 | static inline int pm_runtime_put_sync_suspend(struct device *dev) |
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| 242 | { |
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| 243 | return __pm_runtime_suspend(dev, RPM_GET_PUT); |
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| 244 | } |
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| 245 | |||
| 246 | static inline int pm_runtime_put_sync_autosuspend(struct device *dev) |
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| 247 | { |
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| 248 | return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); |
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| 249 | } |
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| 250 | |||
| 251 | static inline int pm_runtime_set_active(struct device *dev) |
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| 252 | { |
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| 253 | return __pm_runtime_set_status(dev, RPM_ACTIVE); |
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| 254 | } |
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| 255 | |||
| 256 | static inline void pm_runtime_set_suspended(struct device *dev) |
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| 257 | { |
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| 258 | __pm_runtime_set_status(dev, RPM_SUSPENDED); |
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| 259 | } |
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| 260 | |||
| 261 | static inline void pm_runtime_disable(struct device *dev) |
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| 262 | { |
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| 263 | __pm_runtime_disable(dev, true); |
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| 264 | } |
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| 265 | |||
| 266 | static inline void pm_runtime_use_autosuspend(struct device *dev) |
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| 267 | { |
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| 268 | __pm_runtime_use_autosuspend(dev, true); |
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| 269 | } |
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| 270 | |||
| 271 | static inline void pm_runtime_dont_use_autosuspend(struct device *dev) |
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| 272 | { |
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| 273 | __pm_runtime_use_autosuspend(dev, false); |
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| 274 | } |
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| 275 | |||
| 276 | #endif |