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