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_RUNTIME 27 28 extern struct workqueue_struct *pm_wq; 29 30 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 31 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 32 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 33 extern int pm_schedule_suspend(struct device *dev, unsigned int delay); 34 extern int __pm_runtime_set_status(struct device *dev, unsigned int status); 35 extern int pm_runtime_barrier(struct device *dev); 36 extern void pm_runtime_enable(struct device *dev); 37 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 38 extern void pm_runtime_allow(struct device *dev); 39 extern void pm_runtime_forbid(struct device *dev); 40 extern int pm_generic_runtime_idle(struct device *dev); 41 extern int pm_generic_runtime_suspend(struct device *dev); 42 extern int pm_generic_runtime_resume(struct device *dev); 43 extern void pm_runtime_no_callbacks(struct device *dev); 44 extern void pm_runtime_irq_safe(struct device *dev); 45 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 46 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 47 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); 48 extern void pm_runtime_update_max_time_suspended(struct device *dev, 49 s64 delta_ns); 50 51 static inline bool pm_children_suspended(struct device *dev) 52 { 53 return dev->power.ignore_children 54 || !atomic_read(&dev->power.child_count); 55 } 56 57 static inline void pm_runtime_get_noresume(struct device *dev) 58 { 59 atomic_inc(&dev->power.usage_count); 60 } 61 62 static inline void pm_runtime_put_noidle(struct device *dev) 63 { 64 atomic_add_unless(&dev->power.usage_count, -1, 0); 65 } 66 67 static inline bool device_run_wake(struct device *dev) 68 { 69 return dev->power.run_wake; 70 } 71 72 static inline void device_set_run_wake(struct device *dev, bool enable) 73 { 74 dev->power.run_wake = enable; 75 } 76 77 static inline bool pm_runtime_suspended(struct device *dev) 78 { 79 return dev->power.runtime_status == RPM_SUSPENDED 80 && !dev->power.disable_depth; 81 } 82 83 static inline bool pm_runtime_status_suspended(struct device *dev) 84 { 85 return dev->power.runtime_status == RPM_SUSPENDED; 86 } 87 88 static inline bool pm_runtime_enabled(struct device *dev) 89 { 90 return !dev->power.disable_depth; 91 } 92 93 static inline bool pm_runtime_callbacks_present(struct device *dev) 94 { 95 return !dev->power.no_callbacks; 96 } 97 98 static inline void pm_runtime_mark_last_busy(struct device *dev) 99 { 100 ACCESS_ONCE(dev->power.last_busy) = jiffies; 101 } 102 103 #else /* !CONFIG_PM_RUNTIME */ 104 105 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 106 { 107 return -ENOSYS; 108 } 109 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 110 { 111 return -ENOSYS; 112 } 113 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 114 { 115 return 1; 116 } 117 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 118 { 119 return -ENOSYS; 120 } 121 static inline int __pm_runtime_set_status(struct device *dev, 122 unsigned int status) { return 0; } 123 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 124 static inline void pm_runtime_enable(struct device *dev) {} 125 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 126 static inline void pm_runtime_allow(struct device *dev) {} 127 static inline void pm_runtime_forbid(struct device *dev) {} 128 129 static inline bool pm_children_suspended(struct device *dev) { return false; } 130 static inline void pm_runtime_get_noresume(struct device *dev) {} 131 static inline void pm_runtime_put_noidle(struct device *dev) {} 132 static inline bool device_run_wake(struct device *dev) { return false; } 133 static inline void device_set_run_wake(struct device *dev, bool enable) {} 134 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 135 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 136 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 137 138 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } 139 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 140 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 141 static inline void pm_runtime_no_callbacks(struct device *dev) {} 142 static inline void pm_runtime_irq_safe(struct device *dev) {} 143 144 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 145 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 146 static inline void __pm_runtime_use_autosuspend(struct device *dev, 147 bool use) {} 148 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 149 int delay) {} 150 static inline unsigned long pm_runtime_autosuspend_expiration( 151 struct device *dev) { return 0; } 152 153 #endif /* !CONFIG_PM_RUNTIME */ 154 155 static inline int pm_runtime_idle(struct device *dev) 156 { 157 return __pm_runtime_idle(dev, 0); 158 } 159 160 static inline int pm_runtime_suspend(struct device *dev) 161 { 162 return __pm_runtime_suspend(dev, 0); 163 } 164 165 static inline int pm_runtime_autosuspend(struct device *dev) 166 { 167 return __pm_runtime_suspend(dev, RPM_AUTO); 168 } 169 170 static inline int pm_runtime_resume(struct device *dev) 171 { 172 return __pm_runtime_resume(dev, 0); 173 } 174 175 static inline int pm_request_idle(struct device *dev) 176 { 177 return __pm_runtime_idle(dev, RPM_ASYNC); 178 } 179 180 static inline int pm_request_resume(struct device *dev) 181 { 182 return __pm_runtime_resume(dev, RPM_ASYNC); 183 } 184 185 static inline int pm_request_autosuspend(struct device *dev) 186 { 187 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 188 } 189 190 static inline int pm_runtime_get(struct device *dev) 191 { 192 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 193 } 194 195 static inline int pm_runtime_get_sync(struct device *dev) 196 { 197 return __pm_runtime_resume(dev, RPM_GET_PUT); 198 } 199 200 static inline int pm_runtime_put(struct device *dev) 201 { 202 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 203 } 204 205 static inline int pm_runtime_put_autosuspend(struct device *dev) 206 { 207 return __pm_runtime_suspend(dev, 208 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 209 } 210 211 static inline int pm_runtime_put_sync(struct device *dev) 212 { 213 return __pm_runtime_idle(dev, RPM_GET_PUT); 214 } 215 216 static inline int pm_runtime_put_sync_suspend(struct device *dev) 217 { 218 return __pm_runtime_suspend(dev, RPM_GET_PUT); 219 } 220 221 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 222 { 223 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 224 } 225 226 static inline int pm_runtime_set_active(struct device *dev) 227 { 228 return __pm_runtime_set_status(dev, RPM_ACTIVE); 229 } 230 231 static inline void pm_runtime_set_suspended(struct device *dev) 232 { 233 __pm_runtime_set_status(dev, RPM_SUSPENDED); 234 } 235 236 static inline void pm_runtime_disable(struct device *dev) 237 { 238 __pm_runtime_disable(dev, true); 239 } 240 241 static inline void pm_runtime_use_autosuspend(struct device *dev) 242 { 243 __pm_runtime_use_autosuspend(dev, true); 244 } 245 246 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 247 { 248 __pm_runtime_use_autosuspend(dev, false); 249 } 250 251 #endif 252