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/notifier.h> 14 #include <linux/pm.h> 15 16 #include <linux/jiffies.h> 17 18 /* Runtime PM flag argument bits */ 19 #define RPM_ASYNC 0x01 /* Request is asynchronous */ 20 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent 21 state change */ 22 #define RPM_GET_PUT 0x04 /* Increment/decrement the 23 usage_count */ 24 #define RPM_AUTO 0x08 /* Use autosuspend_delay */ 25 26 #ifdef CONFIG_PM 27 extern struct workqueue_struct *pm_wq; 28 29 static inline bool queue_pm_work(struct work_struct *work) 30 { 31 return queue_work(pm_wq, work); 32 } 33 34 extern int pm_generic_runtime_suspend(struct device *dev); 35 extern int pm_generic_runtime_resume(struct device *dev); 36 extern int pm_runtime_force_suspend(struct device *dev); 37 extern int pm_runtime_force_resume(struct device *dev); 38 39 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 40 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 41 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 42 extern int pm_runtime_get_if_in_use(struct device *dev); 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); 45 extern int pm_runtime_barrier(struct device *dev); 46 extern void pm_runtime_enable(struct device *dev); 47 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 48 extern void pm_runtime_allow(struct device *dev); 49 extern void pm_runtime_forbid(struct device *dev); 50 extern void pm_runtime_no_callbacks(struct device *dev); 51 extern void pm_runtime_irq_safe(struct device *dev); 52 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 53 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 54 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); 55 extern void pm_runtime_update_max_time_suspended(struct device *dev, 56 s64 delta_ns); 57 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable); 58 59 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 60 { 61 dev->power.ignore_children = enable; 62 } 63 64 static inline bool pm_children_suspended(struct device *dev) 65 { 66 return dev->power.ignore_children 67 || !atomic_read(&dev->power.child_count); 68 } 69 70 static inline void pm_runtime_get_noresume(struct device *dev) 71 { 72 atomic_inc(&dev->power.usage_count); 73 } 74 75 static inline void pm_runtime_put_noidle(struct device *dev) 76 { 77 atomic_add_unless(&dev->power.usage_count, -1, 0); 78 } 79 80 static inline bool device_run_wake(struct device *dev) 81 { 82 return dev->power.run_wake; 83 } 84 85 static inline void device_set_run_wake(struct device *dev, bool enable) 86 { 87 dev->power.run_wake = enable; 88 } 89 90 static inline bool pm_runtime_suspended(struct device *dev) 91 { 92 return dev->power.runtime_status == RPM_SUSPENDED 93 && !dev->power.disable_depth; 94 } 95 96 static inline bool pm_runtime_active(struct device *dev) 97 { 98 return dev->power.runtime_status == RPM_ACTIVE 99 || dev->power.disable_depth; 100 } 101 102 static inline bool pm_runtime_status_suspended(struct device *dev) 103 { 104 return dev->power.runtime_status == RPM_SUSPENDED; 105 } 106 107 static inline bool pm_runtime_enabled(struct device *dev) 108 { 109 return !dev->power.disable_depth; 110 } 111 112 static inline bool pm_runtime_callbacks_present(struct device *dev) 113 { 114 return !dev->power.no_callbacks; 115 } 116 117 static inline void pm_runtime_mark_last_busy(struct device *dev) 118 { 119 ACCESS_ONCE(dev->power.last_busy) = jiffies; 120 } 121 122 static inline bool pm_runtime_is_irq_safe(struct device *dev) 123 { 124 return dev->power.irq_safe; 125 } 126 127 #else /* !CONFIG_PM */ 128 129 static inline bool queue_pm_work(struct work_struct *work) { return false; } 130 131 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 132 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 133 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } 134 static inline int pm_runtime_force_resume(struct device *dev) { return 0; } 135 136 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 137 { 138 return -ENOSYS; 139 } 140 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 141 { 142 return -ENOSYS; 143 } 144 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 145 { 146 return 1; 147 } 148 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 149 { 150 return -ENOSYS; 151 } 152 static inline int pm_runtime_get_if_in_use(struct device *dev) 153 { 154 return -EINVAL; 155 } 156 static inline int __pm_runtime_set_status(struct device *dev, 157 unsigned int status) { return 0; } 158 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 159 static inline void pm_runtime_enable(struct device *dev) {} 160 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 161 static inline void pm_runtime_allow(struct device *dev) {} 162 static inline void pm_runtime_forbid(struct device *dev) {} 163 164 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {} 165 static inline bool pm_children_suspended(struct device *dev) { return false; } 166 static inline void pm_runtime_get_noresume(struct device *dev) {} 167 static inline void pm_runtime_put_noidle(struct device *dev) {} 168 static inline bool device_run_wake(struct device *dev) { return false; } 169 static inline void device_set_run_wake(struct device *dev, bool enable) {} 170 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 171 static inline bool pm_runtime_active(struct device *dev) { return true; } 172 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 173 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 174 175 static inline void pm_runtime_no_callbacks(struct device *dev) {} 176 static inline void pm_runtime_irq_safe(struct device *dev) {} 177 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } 178 179 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 180 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 181 static inline void __pm_runtime_use_autosuspend(struct device *dev, 182 bool use) {} 183 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 184 int delay) {} 185 static inline unsigned long pm_runtime_autosuspend_expiration( 186 struct device *dev) { return 0; } 187 static inline void pm_runtime_set_memalloc_noio(struct device *dev, 188 bool enable){} 189 190 #endif /* !CONFIG_PM */ 191 192 static inline int pm_runtime_idle(struct device *dev) 193 { 194 return __pm_runtime_idle(dev, 0); 195 } 196 197 static inline int pm_runtime_suspend(struct device *dev) 198 { 199 return __pm_runtime_suspend(dev, 0); 200 } 201 202 static inline int pm_runtime_autosuspend(struct device *dev) 203 { 204 return __pm_runtime_suspend(dev, RPM_AUTO); 205 } 206 207 static inline int pm_runtime_resume(struct device *dev) 208 { 209 return __pm_runtime_resume(dev, 0); 210 } 211 212 static inline int pm_request_idle(struct device *dev) 213 { 214 return __pm_runtime_idle(dev, RPM_ASYNC); 215 } 216 217 static inline int pm_request_resume(struct device *dev) 218 { 219 return __pm_runtime_resume(dev, RPM_ASYNC); 220 } 221 222 static inline int pm_request_autosuspend(struct device *dev) 223 { 224 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 225 } 226 227 static inline int pm_runtime_get(struct device *dev) 228 { 229 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 230 } 231 232 static inline int pm_runtime_get_sync(struct device *dev) 233 { 234 return __pm_runtime_resume(dev, RPM_GET_PUT); 235 } 236 237 static inline int pm_runtime_put(struct device *dev) 238 { 239 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 240 } 241 242 static inline int pm_runtime_put_autosuspend(struct device *dev) 243 { 244 return __pm_runtime_suspend(dev, 245 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 246 } 247 248 static inline int pm_runtime_put_sync(struct device *dev) 249 { 250 return __pm_runtime_idle(dev, RPM_GET_PUT); 251 } 252 253 static inline int pm_runtime_put_sync_suspend(struct device *dev) 254 { 255 return __pm_runtime_suspend(dev, RPM_GET_PUT); 256 } 257 258 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 259 { 260 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 261 } 262 263 static inline int pm_runtime_set_active(struct device *dev) 264 { 265 return __pm_runtime_set_status(dev, RPM_ACTIVE); 266 } 267 268 static inline void pm_runtime_set_suspended(struct device *dev) 269 { 270 __pm_runtime_set_status(dev, RPM_SUSPENDED); 271 } 272 273 static inline void pm_runtime_disable(struct device *dev) 274 { 275 __pm_runtime_disable(dev, true); 276 } 277 278 static inline void pm_runtime_use_autosuspend(struct device *dev) 279 { 280 __pm_runtime_use_autosuspend(dev, true); 281 } 282 283 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 284 { 285 __pm_runtime_use_autosuspend(dev, false); 286 } 287 288 #endif 289