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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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| 6936 | serge | 13 | #include |
| 6082 | serge | 14 | #include |
| 15 | |||
| 16 | #include |
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| 17 | |||
| 18 | /* Runtime PM flag argument bits */ |
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| 19 | #define RPM_ASYNC 0x01 /* Request is asynchronous */ |
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| 20 | #define RPM_NOWAIT 0x02 /* Don't wait for concurrent |
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| 21 | state change */ |
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| 22 | #define RPM_GET_PUT 0x04 /* Increment/decrement the |
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| 23 | usage_count */ |
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| 24 | #define RPM_AUTO 0x08 /* Use autosuspend_delay */ |
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| 25 | |||
| 26 | #ifdef CONFIG_PM |
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| 27 | extern struct workqueue_struct *pm_wq; |
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| 28 | |||
| 29 | static inline bool queue_pm_work(struct work_struct *work) |
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| 30 | { |
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| 31 | return queue_work(pm_wq, work); |
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| 32 | } |
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| 33 | |||
| 34 | extern int pm_generic_runtime_suspend(struct device *dev); |
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| 35 | extern int pm_generic_runtime_resume(struct device *dev); |
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| 36 | extern int pm_runtime_force_suspend(struct device *dev); |
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| 37 | extern int pm_runtime_force_resume(struct device *dev); |
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| 38 | |||
| 39 | extern int __pm_runtime_idle(struct device *dev, int rpmflags); |
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| 40 | extern int __pm_runtime_suspend(struct device *dev, int rpmflags); |
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| 41 | extern int __pm_runtime_resume(struct device *dev, int rpmflags); |
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| 6936 | serge | 42 | extern int pm_runtime_get_if_in_use(struct device *dev); |
| 6082 | serge | 43 | extern int pm_schedule_suspend(struct device *dev, unsigned int delay); |
| 44 | extern int __pm_runtime_set_status(struct device *dev, unsigned int status); |
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| 45 | extern int pm_runtime_barrier(struct device *dev); |
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| 46 | extern void pm_runtime_enable(struct device *dev); |
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| 47 | extern void __pm_runtime_disable(struct device *dev, bool check_resume); |
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| 48 | extern void pm_runtime_allow(struct device *dev); |
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| 49 | extern void pm_runtime_forbid(struct device *dev); |
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| 50 | extern void pm_runtime_no_callbacks(struct device *dev); |
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| 51 | extern void pm_runtime_irq_safe(struct device *dev); |
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| 52 | extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); |
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| 53 | extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); |
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| 54 | extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); |
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| 55 | extern void pm_runtime_update_max_time_suspended(struct device *dev, |
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| 56 | s64 delta_ns); |
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| 57 | extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable); |
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| 58 | |||
| 59 | static inline bool pm_children_suspended(struct device *dev) |
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| 60 | { |
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| 61 | return dev->power.ignore_children |
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| 62 | || !atomic_read(&dev->power.child_count); |
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| 63 | } |
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| 64 | |||
| 65 | static inline void pm_runtime_get_noresume(struct device *dev) |
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| 66 | { |
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| 67 | atomic_inc(&dev->power.usage_count); |
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| 68 | } |
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| 69 | |||
| 70 | static inline void pm_runtime_put_noidle(struct device *dev) |
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| 71 | { |
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| 72 | atomic_add_unless(&dev->power.usage_count, -1, 0); |
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| 73 | } |
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| 74 | |||
| 75 | static inline bool device_run_wake(struct device *dev) |
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| 76 | { |
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| 77 | return dev->power.run_wake; |
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| 78 | } |
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| 79 | |||
| 80 | static inline void device_set_run_wake(struct device *dev, bool enable) |
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| 81 | { |
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| 82 | dev->power.run_wake = enable; |
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| 83 | } |
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| 84 | |||
| 85 | static inline bool pm_runtime_suspended(struct device *dev) |
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| 86 | { |
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| 87 | return dev->power.runtime_status == RPM_SUSPENDED |
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| 88 | && !dev->power.disable_depth; |
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| 89 | } |
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| 90 | |||
| 91 | static inline bool pm_runtime_active(struct device *dev) |
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| 92 | { |
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| 93 | return dev->power.runtime_status == RPM_ACTIVE |
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| 94 | || dev->power.disable_depth; |
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| 95 | } |
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| 96 | |||
| 97 | static inline bool pm_runtime_status_suspended(struct device *dev) |
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| 98 | { |
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| 99 | return dev->power.runtime_status == RPM_SUSPENDED; |
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| 100 | } |
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| 101 | |||
| 102 | static inline bool pm_runtime_enabled(struct device *dev) |
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| 103 | { |
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| 104 | return !dev->power.disable_depth; |
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| 105 | } |
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| 106 | |||
| 107 | static inline bool pm_runtime_callbacks_present(struct device *dev) |
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| 108 | { |
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| 109 | return !dev->power.no_callbacks; |
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| 110 | } |
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| 111 | |||
| 112 | static inline void pm_runtime_mark_last_busy(struct device *dev) |
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| 113 | { |
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| 114 | ACCESS_ONCE(dev->power.last_busy) = jiffies; |
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| 115 | } |
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| 116 | |||
| 117 | static inline bool pm_runtime_is_irq_safe(struct device *dev) |
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| 118 | { |
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| 119 | return dev->power.irq_safe; |
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| 120 | } |
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| 121 | |||
| 122 | #else /* !CONFIG_PM */ |
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| 123 | |||
| 124 | static inline bool queue_pm_work(struct work_struct *work) { return false; } |
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| 125 | |||
| 126 | static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } |
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| 127 | static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } |
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| 128 | static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } |
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| 129 | static inline int pm_runtime_force_resume(struct device *dev) { return 0; } |
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| 130 | |||
| 131 | static inline int __pm_runtime_idle(struct device *dev, int rpmflags) |
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| 132 | { |
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| 133 | return -ENOSYS; |
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| 134 | } |
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| 135 | static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) |
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| 136 | { |
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| 137 | return -ENOSYS; |
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| 138 | } |
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| 139 | static inline int __pm_runtime_resume(struct device *dev, int rpmflags) |
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| 140 | { |
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| 141 | return 1; |
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| 142 | } |
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| 143 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) |
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| 144 | { |
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| 145 | return -ENOSYS; |
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| 146 | } |
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| 6936 | serge | 147 | static inline int pm_runtime_get_if_in_use(struct device *dev) |
| 148 | { |
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| 149 | return -EINVAL; |
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| 150 | } |
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| 6082 | serge | 151 | static inline int __pm_runtime_set_status(struct device *dev, |
| 152 | unsigned int status) { return 0; } |
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| 153 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } |
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| 154 | static inline void pm_runtime_enable(struct device *dev) {} |
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| 155 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} |
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| 156 | static inline void pm_runtime_allow(struct device *dev) {} |
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| 157 | static inline void pm_runtime_forbid(struct device *dev) {} |
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| 158 | |||
| 159 | static inline bool pm_children_suspended(struct device *dev) { return false; } |
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| 160 | static inline void pm_runtime_get_noresume(struct device *dev) {} |
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| 161 | static inline void pm_runtime_put_noidle(struct device *dev) {} |
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| 162 | static inline bool device_run_wake(struct device *dev) { return false; } |
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| 163 | static inline void device_set_run_wake(struct device *dev, bool enable) {} |
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| 164 | static inline bool pm_runtime_suspended(struct device *dev) { return false; } |
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| 165 | static inline bool pm_runtime_active(struct device *dev) { return true; } |
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| 166 | static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } |
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| 167 | static inline bool pm_runtime_enabled(struct device *dev) { return false; } |
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| 168 | |||
| 169 | static inline void pm_runtime_no_callbacks(struct device *dev) {} |
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| 170 | static inline void pm_runtime_irq_safe(struct device *dev) {} |
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| 171 | static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } |
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| 172 | |||
| 173 | static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } |
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| 174 | static inline void pm_runtime_mark_last_busy(struct device *dev) {} |
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| 175 | static inline void __pm_runtime_use_autosuspend(struct device *dev, |
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| 176 | bool use) {} |
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| 177 | static inline void pm_runtime_set_autosuspend_delay(struct device *dev, |
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| 178 | int delay) {} |
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| 179 | static inline unsigned long pm_runtime_autosuspend_expiration( |
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| 180 | struct device *dev) { return 0; } |
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| 181 | static inline void pm_runtime_set_memalloc_noio(struct device *dev, |
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| 182 | bool enable){} |
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| 183 | |||
| 184 | #endif /* !CONFIG_PM */ |
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| 185 | |||
| 186 | static inline int pm_runtime_idle(struct device *dev) |
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| 187 | { |
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| 188 | return __pm_runtime_idle(dev, 0); |
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| 189 | } |
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| 190 | |||
| 191 | static inline int pm_runtime_suspend(struct device *dev) |
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| 192 | { |
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| 193 | return __pm_runtime_suspend(dev, 0); |
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| 194 | } |
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| 195 | |||
| 196 | static inline int pm_runtime_autosuspend(struct device *dev) |
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| 197 | { |
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| 198 | return __pm_runtime_suspend(dev, RPM_AUTO); |
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| 199 | } |
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| 200 | |||
| 201 | static inline int pm_runtime_resume(struct device *dev) |
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| 202 | { |
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| 203 | return __pm_runtime_resume(dev, 0); |
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| 204 | } |
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| 205 | |||
| 206 | static inline int pm_request_idle(struct device *dev) |
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| 207 | { |
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| 208 | return __pm_runtime_idle(dev, RPM_ASYNC); |
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| 209 | } |
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| 210 | |||
| 211 | static inline int pm_request_resume(struct device *dev) |
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| 212 | { |
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| 213 | return __pm_runtime_resume(dev, RPM_ASYNC); |
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| 214 | } |
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| 215 | |||
| 216 | static inline int pm_request_autosuspend(struct device *dev) |
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| 217 | { |
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| 218 | return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); |
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| 219 | } |
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| 220 | |||
| 221 | static inline int pm_runtime_get(struct device *dev) |
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| 222 | { |
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| 223 | return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); |
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| 224 | } |
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| 225 | |||
| 226 | static inline int pm_runtime_get_sync(struct device *dev) |
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| 227 | { |
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| 228 | return __pm_runtime_resume(dev, RPM_GET_PUT); |
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| 229 | } |
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| 230 | |||
| 231 | static inline int pm_runtime_put(struct device *dev) |
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| 232 | { |
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| 233 | return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); |
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| 234 | } |
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| 235 | |||
| 236 | static inline int pm_runtime_put_autosuspend(struct device *dev) |
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| 237 | { |
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| 238 | return __pm_runtime_suspend(dev, |
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| 239 | RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); |
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| 240 | } |
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| 241 | |||
| 242 | static inline int pm_runtime_put_sync(struct device *dev) |
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| 243 | { |
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| 244 | return __pm_runtime_idle(dev, RPM_GET_PUT); |
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| 245 | } |
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| 246 | |||
| 247 | static inline int pm_runtime_put_sync_suspend(struct device *dev) |
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| 248 | { |
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| 249 | return __pm_runtime_suspend(dev, RPM_GET_PUT); |
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| 250 | } |
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| 251 | |||
| 252 | static inline int pm_runtime_put_sync_autosuspend(struct device *dev) |
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| 253 | { |
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| 254 | return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); |
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| 255 | } |
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| 256 | |||
| 257 | static inline int pm_runtime_set_active(struct device *dev) |
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| 258 | { |
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| 259 | return __pm_runtime_set_status(dev, RPM_ACTIVE); |
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| 260 | } |
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| 261 | |||
| 262 | static inline void pm_runtime_set_suspended(struct device *dev) |
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| 263 | { |
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| 264 | __pm_runtime_set_status(dev, RPM_SUSPENDED); |
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| 265 | } |
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| 266 | |||
| 267 | static inline void pm_runtime_disable(struct device *dev) |
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| 268 | { |
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| 269 | __pm_runtime_disable(dev, true); |
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| 270 | } |
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| 271 | |||
| 272 | static inline void pm_runtime_use_autosuspend(struct device *dev) |
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| 273 | { |
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| 274 | __pm_runtime_use_autosuspend(dev, true); |
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| 275 | } |
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| 276 | |||
| 277 | static inline void pm_runtime_dont_use_autosuspend(struct device *dev) |
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| 278 | { |
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| 279 | __pm_runtime_use_autosuspend(dev, false); |
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| 280 | } |
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| 281 | |||
| 282 | #endif |