1 /* 2 * pm_runtime.h - Device run-time power management helper functions. 3 * 4 * Copyright (C) 2009 Rafael J. Wysocki <[email protected]> 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 #include <linux/jiffies.h> 16 17 /* Runtime PM flag argument bits */ 18 #define RPM_ASYNC 0x01 /* Request is asynchronous */ 19 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent 20 state change */ 21 #define RPM_GET_PUT 0x04 /* Increment/decrement the 22 usage_count */ 23 #define RPM_AUTO 0x08 /* Use autosuspend_delay */ 24 25 #ifdef CONFIG_PM_RUNTIME 26 27 extern struct workqueue_struct *pm_wq; 28 29 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 30 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 31 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 32 extern int pm_schedule_suspend(struct device *dev, unsigned int delay); 33 extern int __pm_runtime_set_status(struct device *dev, unsigned int status); 34 extern int pm_runtime_barrier(struct device *dev); 35 extern void pm_runtime_enable(struct device *dev); 36 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 37 extern void pm_runtime_allow(struct device *dev); 38 extern void pm_runtime_forbid(struct device *dev); 39 extern int pm_generic_runtime_idle(struct device *dev); 40 extern int pm_generic_runtime_suspend(struct device *dev); 41 extern int pm_generic_runtime_resume(struct device *dev); 42 extern void pm_runtime_no_callbacks(struct device *dev); 43 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 44 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 45 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); 46 47 static inline bool pm_children_suspended(struct device *dev) 48 { 49 return dev->power.ignore_children 50 || !atomic_read(&dev->power.child_count); 51 } 52 53 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 54 { 55 dev->power.ignore_children = enable; 56 } 57 58 static inline void pm_runtime_get_noresume(struct device *dev) 59 { 60 atomic_inc(&dev->power.usage_count); 61 } 62 63 static inline void pm_runtime_put_noidle(struct device *dev) 64 { 65 atomic_add_unless(&dev->power.usage_count, -1, 0); 66 } 67 68 static inline bool device_run_wake(struct device *dev) 69 { 70 return dev->power.run_wake; 71 } 72 73 static inline void device_set_run_wake(struct device *dev, bool enable) 74 { 75 dev->power.run_wake = enable; 76 } 77 78 static inline bool pm_runtime_suspended(struct device *dev) 79 { 80 return dev->power.runtime_status == RPM_SUSPENDED; 81 } 82 83 static inline void pm_runtime_mark_last_busy(struct device *dev) 84 { 85 ACCESS_ONCE(dev->power.last_busy) = jiffies; 86 } 87 88 #else /* !CONFIG_PM_RUNTIME */ 89 90 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 91 { 92 return -ENOSYS; 93 } 94 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 95 { 96 return -ENOSYS; 97 } 98 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 99 { 100 return 1; 101 } 102 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 103 { 104 return -ENOSYS; 105 } 106 static inline int __pm_runtime_set_status(struct device *dev, 107 unsigned int status) { return 0; } 108 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 109 static inline void pm_runtime_enable(struct device *dev) {} 110 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 111 static inline void pm_runtime_allow(struct device *dev) {} 112 static inline void pm_runtime_forbid(struct device *dev) {} 113 114 static inline bool pm_children_suspended(struct device *dev) { return false; } 115 static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} 116 static inline void pm_runtime_get_noresume(struct device *dev) {} 117 static inline void pm_runtime_put_noidle(struct device *dev) {} 118 static inline bool device_run_wake(struct device *dev) { return false; } 119 static inline void device_set_run_wake(struct device *dev, bool enable) {} 120 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 121 122 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } 123 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 124 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 125 static inline void pm_runtime_no_callbacks(struct device *dev) {} 126 127 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 128 static inline void __pm_runtime_use_autosuspend(struct device *dev, 129 bool use) {} 130 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 131 int delay) {} 132 static inline unsigned long pm_runtime_autosuspend_expiration( 133 struct device *dev) { return 0; } 134 135 #endif /* !CONFIG_PM_RUNTIME */ 136 137 static inline int pm_runtime_idle(struct device *dev) 138 { 139 return __pm_runtime_idle(dev, 0); 140 } 141 142 static inline int pm_runtime_suspend(struct device *dev) 143 { 144 return __pm_runtime_suspend(dev, 0); 145 } 146 147 static inline int pm_runtime_autosuspend(struct device *dev) 148 { 149 return __pm_runtime_suspend(dev, RPM_AUTO); 150 } 151 152 static inline int pm_runtime_resume(struct device *dev) 153 { 154 return __pm_runtime_resume(dev, 0); 155 } 156 157 static inline int pm_request_idle(struct device *dev) 158 { 159 return __pm_runtime_idle(dev, RPM_ASYNC); 160 } 161 162 static inline int pm_request_resume(struct device *dev) 163 { 164 return __pm_runtime_resume(dev, RPM_ASYNC); 165 } 166 167 static inline int pm_request_autosuspend(struct device *dev) 168 { 169 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 170 } 171 172 static inline int pm_runtime_get(struct device *dev) 173 { 174 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 175 } 176 177 static inline int pm_runtime_get_sync(struct device *dev) 178 { 179 return __pm_runtime_resume(dev, RPM_GET_PUT); 180 } 181 182 static inline int pm_runtime_put(struct device *dev) 183 { 184 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 185 } 186 187 static inline int pm_runtime_put_autosuspend(struct device *dev) 188 { 189 return __pm_runtime_suspend(dev, 190 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 191 } 192 193 static inline int pm_runtime_put_sync(struct device *dev) 194 { 195 return __pm_runtime_idle(dev, RPM_GET_PUT); 196 } 197 198 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 199 { 200 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 201 } 202 203 static inline int pm_runtime_set_active(struct device *dev) 204 { 205 return __pm_runtime_set_status(dev, RPM_ACTIVE); 206 } 207 208 static inline void pm_runtime_set_suspended(struct device *dev) 209 { 210 __pm_runtime_set_status(dev, RPM_SUSPENDED); 211 } 212 213 static inline void pm_runtime_disable(struct device *dev) 214 { 215 __pm_runtime_disable(dev, true); 216 } 217 218 static inline void pm_runtime_use_autosuspend(struct device *dev) 219 { 220 __pm_runtime_use_autosuspend(dev, true); 221 } 222 223 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 224 { 225 __pm_runtime_use_autosuspend(dev, false); 226 } 227 228 #endif 229