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 49 static inline bool pm_children_suspended(struct device *dev) 50 { 51 return dev->power.ignore_children 52 || !atomic_read(&dev->power.child_count); 53 } 54 55 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 56 { 57 dev->power.ignore_children = enable; 58 } 59 60 static inline void pm_runtime_get_noresume(struct device *dev) 61 { 62 atomic_inc(&dev->power.usage_count); 63 } 64 65 static inline void pm_runtime_put_noidle(struct device *dev) 66 { 67 atomic_add_unless(&dev->power.usage_count, -1, 0); 68 } 69 70 static inline bool device_run_wake(struct device *dev) 71 { 72 return dev->power.run_wake; 73 } 74 75 static inline void device_set_run_wake(struct device *dev, bool enable) 76 { 77 dev->power.run_wake = enable; 78 } 79 80 static inline bool pm_runtime_suspended(struct device *dev) 81 { 82 return dev->power.runtime_status == RPM_SUSPENDED 83 && !dev->power.disable_depth; 84 } 85 86 static inline bool pm_runtime_status_suspended(struct device *dev) 87 { 88 return dev->power.runtime_status == RPM_SUSPENDED; 89 } 90 91 static inline bool pm_runtime_enabled(struct device *dev) 92 { 93 return !dev->power.disable_depth; 94 } 95 96 static inline bool pm_runtime_callbacks_present(struct device *dev) 97 { 98 return !dev->power.no_callbacks; 99 } 100 101 static inline void pm_runtime_mark_last_busy(struct device *dev) 102 { 103 ACCESS_ONCE(dev->power.last_busy) = jiffies; 104 } 105 106 #else /* !CONFIG_PM_RUNTIME */ 107 108 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 109 { 110 return -ENOSYS; 111 } 112 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 113 { 114 return -ENOSYS; 115 } 116 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 117 { 118 return 1; 119 } 120 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 121 { 122 return -ENOSYS; 123 } 124 static inline int __pm_runtime_set_status(struct device *dev, 125 unsigned int status) { return 0; } 126 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 127 static inline void pm_runtime_enable(struct device *dev) {} 128 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 129 static inline void pm_runtime_allow(struct device *dev) {} 130 static inline void pm_runtime_forbid(struct device *dev) {} 131 132 static inline bool pm_children_suspended(struct device *dev) { return false; } 133 static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} 134 static inline void pm_runtime_get_noresume(struct device *dev) {} 135 static inline void pm_runtime_put_noidle(struct device *dev) {} 136 static inline bool device_run_wake(struct device *dev) { return false; } 137 static inline void device_set_run_wake(struct device *dev, bool enable) {} 138 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 139 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 140 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 141 142 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } 143 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 144 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 145 static inline void pm_runtime_no_callbacks(struct device *dev) {} 146 static inline void pm_runtime_irq_safe(struct device *dev) {} 147 148 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 149 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 150 static inline void __pm_runtime_use_autosuspend(struct device *dev, 151 bool use) {} 152 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 153 int delay) {} 154 static inline unsigned long pm_runtime_autosuspend_expiration( 155 struct device *dev) { return 0; } 156 157 #endif /* !CONFIG_PM_RUNTIME */ 158 159 static inline int pm_runtime_idle(struct device *dev) 160 { 161 return __pm_runtime_idle(dev, 0); 162 } 163 164 static inline int pm_runtime_suspend(struct device *dev) 165 { 166 return __pm_runtime_suspend(dev, 0); 167 } 168 169 static inline int pm_runtime_autosuspend(struct device *dev) 170 { 171 return __pm_runtime_suspend(dev, RPM_AUTO); 172 } 173 174 static inline int pm_runtime_resume(struct device *dev) 175 { 176 return __pm_runtime_resume(dev, 0); 177 } 178 179 static inline int pm_request_idle(struct device *dev) 180 { 181 return __pm_runtime_idle(dev, RPM_ASYNC); 182 } 183 184 static inline int pm_request_resume(struct device *dev) 185 { 186 return __pm_runtime_resume(dev, RPM_ASYNC); 187 } 188 189 static inline int pm_request_autosuspend(struct device *dev) 190 { 191 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 192 } 193 194 static inline int pm_runtime_get(struct device *dev) 195 { 196 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 197 } 198 199 static inline int pm_runtime_get_sync(struct device *dev) 200 { 201 return __pm_runtime_resume(dev, RPM_GET_PUT); 202 } 203 204 static inline int pm_runtime_put(struct device *dev) 205 { 206 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 207 } 208 209 static inline int pm_runtime_put_autosuspend(struct device *dev) 210 { 211 return __pm_runtime_suspend(dev, 212 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 213 } 214 215 static inline int pm_runtime_put_sync(struct device *dev) 216 { 217 return __pm_runtime_idle(dev, RPM_GET_PUT); 218 } 219 220 static inline int pm_runtime_put_sync_suspend(struct device *dev) 221 { 222 return __pm_runtime_suspend(dev, RPM_GET_PUT); 223 } 224 225 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 226 { 227 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 228 } 229 230 static inline int pm_runtime_set_active(struct device *dev) 231 { 232 return __pm_runtime_set_status(dev, RPM_ACTIVE); 233 } 234 235 static inline void pm_runtime_set_suspended(struct device *dev) 236 { 237 __pm_runtime_set_status(dev, RPM_SUSPENDED); 238 } 239 240 static inline void pm_runtime_disable(struct device *dev) 241 { 242 __pm_runtime_disable(dev, true); 243 } 244 245 static inline void pm_runtime_use_autosuspend(struct device *dev) 246 { 247 __pm_runtime_use_autosuspend(dev, true); 248 } 249 250 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 251 { 252 __pm_runtime_use_autosuspend(dev, false); 253 } 254 255 #endif 256