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 extern void pm_runtime_clean_up_links(struct device *dev); 59 extern void pm_runtime_get_suppliers(struct device *dev); 60 extern void pm_runtime_put_suppliers(struct device *dev); 61 extern void pm_runtime_new_link(struct device *dev); 62 extern void pm_runtime_drop_link(struct device *dev); 63 64 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 65 { 66 dev->power.ignore_children = enable; 67 } 68 69 static inline void pm_runtime_get_noresume(struct device *dev) 70 { 71 atomic_inc(&dev->power.usage_count); 72 } 73 74 static inline void pm_runtime_put_noidle(struct device *dev) 75 { 76 atomic_add_unless(&dev->power.usage_count, -1, 0); 77 } 78 79 static inline bool device_run_wake(struct device *dev) 80 { 81 return dev->power.run_wake; 82 } 83 84 static inline void device_set_run_wake(struct device *dev, bool enable) 85 { 86 dev->power.run_wake = enable; 87 } 88 89 static inline bool pm_runtime_suspended(struct device *dev) 90 { 91 return dev->power.runtime_status == RPM_SUSPENDED 92 && !dev->power.disable_depth; 93 } 94 95 static inline bool pm_runtime_active(struct device *dev) 96 { 97 return dev->power.runtime_status == RPM_ACTIVE 98 || dev->power.disable_depth; 99 } 100 101 static inline bool pm_runtime_status_suspended(struct device *dev) 102 { 103 return dev->power.runtime_status == RPM_SUSPENDED; 104 } 105 106 static inline bool pm_runtime_enabled(struct device *dev) 107 { 108 return !dev->power.disable_depth; 109 } 110 111 static inline bool pm_runtime_callbacks_present(struct device *dev) 112 { 113 return !dev->power.no_callbacks; 114 } 115 116 static inline void pm_runtime_mark_last_busy(struct device *dev) 117 { 118 ACCESS_ONCE(dev->power.last_busy) = jiffies; 119 } 120 121 static inline bool pm_runtime_is_irq_safe(struct device *dev) 122 { 123 return dev->power.irq_safe; 124 } 125 126 #else /* !CONFIG_PM */ 127 128 static inline bool queue_pm_work(struct work_struct *work) { return false; } 129 130 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 131 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 132 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } 133 static inline int pm_runtime_force_resume(struct device *dev) { return 0; } 134 135 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 136 { 137 return -ENOSYS; 138 } 139 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 140 { 141 return -ENOSYS; 142 } 143 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 144 { 145 return 1; 146 } 147 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 148 { 149 return -ENOSYS; 150 } 151 static inline int pm_runtime_get_if_in_use(struct device *dev) 152 { 153 return -EINVAL; 154 } 155 static inline int __pm_runtime_set_status(struct device *dev, 156 unsigned int status) { return 0; } 157 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 158 static inline void pm_runtime_enable(struct device *dev) {} 159 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 160 static inline void pm_runtime_allow(struct device *dev) {} 161 static inline void pm_runtime_forbid(struct device *dev) {} 162 163 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {} 164 static inline void pm_runtime_get_noresume(struct device *dev) {} 165 static inline void pm_runtime_put_noidle(struct device *dev) {} 166 static inline bool device_run_wake(struct device *dev) { return false; } 167 static inline void device_set_run_wake(struct device *dev, bool enable) {} 168 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 169 static inline bool pm_runtime_active(struct device *dev) { return true; } 170 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 171 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 172 173 static inline void pm_runtime_no_callbacks(struct device *dev) {} 174 static inline void pm_runtime_irq_safe(struct device *dev) {} 175 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } 176 177 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 178 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 179 static inline void __pm_runtime_use_autosuspend(struct device *dev, 180 bool use) {} 181 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 182 int delay) {} 183 static inline unsigned long pm_runtime_autosuspend_expiration( 184 struct device *dev) { return 0; } 185 static inline void pm_runtime_set_memalloc_noio(struct device *dev, 186 bool enable){} 187 static inline void pm_runtime_clean_up_links(struct device *dev) {} 188 static inline void pm_runtime_get_suppliers(struct device *dev) {} 189 static inline void pm_runtime_put_suppliers(struct device *dev) {} 190 static inline void pm_runtime_new_link(struct device *dev) {} 191 static inline void pm_runtime_drop_link(struct device *dev) {} 192 193 #endif /* !CONFIG_PM */ 194 195 static inline int pm_runtime_idle(struct device *dev) 196 { 197 return __pm_runtime_idle(dev, 0); 198 } 199 200 static inline int pm_runtime_suspend(struct device *dev) 201 { 202 return __pm_runtime_suspend(dev, 0); 203 } 204 205 static inline int pm_runtime_autosuspend(struct device *dev) 206 { 207 return __pm_runtime_suspend(dev, RPM_AUTO); 208 } 209 210 static inline int pm_runtime_resume(struct device *dev) 211 { 212 return __pm_runtime_resume(dev, 0); 213 } 214 215 static inline int pm_request_idle(struct device *dev) 216 { 217 return __pm_runtime_idle(dev, RPM_ASYNC); 218 } 219 220 static inline int pm_request_resume(struct device *dev) 221 { 222 return __pm_runtime_resume(dev, RPM_ASYNC); 223 } 224 225 static inline int pm_request_autosuspend(struct device *dev) 226 { 227 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 228 } 229 230 static inline int pm_runtime_get(struct device *dev) 231 { 232 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 233 } 234 235 static inline int pm_runtime_get_sync(struct device *dev) 236 { 237 return __pm_runtime_resume(dev, RPM_GET_PUT); 238 } 239 240 static inline int pm_runtime_put(struct device *dev) 241 { 242 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 243 } 244 245 static inline int pm_runtime_put_autosuspend(struct device *dev) 246 { 247 return __pm_runtime_suspend(dev, 248 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 249 } 250 251 static inline int pm_runtime_put_sync(struct device *dev) 252 { 253 return __pm_runtime_idle(dev, RPM_GET_PUT); 254 } 255 256 static inline int pm_runtime_put_sync_suspend(struct device *dev) 257 { 258 return __pm_runtime_suspend(dev, RPM_GET_PUT); 259 } 260 261 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 262 { 263 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 264 } 265 266 static inline int pm_runtime_set_active(struct device *dev) 267 { 268 return __pm_runtime_set_status(dev, RPM_ACTIVE); 269 } 270 271 static inline int pm_runtime_set_suspended(struct device *dev) 272 { 273 return __pm_runtime_set_status(dev, RPM_SUSPENDED); 274 } 275 276 static inline void pm_runtime_disable(struct device *dev) 277 { 278 __pm_runtime_disable(dev, true); 279 } 280 281 static inline void pm_runtime_use_autosuspend(struct device *dev) 282 { 283 __pm_runtime_use_autosuspend(dev, true); 284 } 285 286 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 287 { 288 __pm_runtime_use_autosuspend(dev, false); 289 } 290 291 #endif 292