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/pm.h> 14 15 #include <linux/jiffies.h> 16 17 /* Runtime PM flag argument bits */ 18 #define RPM_ASYNC 0x01 /* Request is asynchronous */ 19 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent 20 state change */ 21 #define RPM_GET_PUT 0x04 /* Increment/decrement the 22 usage_count */ 23 #define RPM_AUTO 0x08 /* Use autosuspend_delay */ 24 25 #ifdef CONFIG_PM_RUNTIME 26 27 extern struct workqueue_struct *pm_wq; 28 29 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 30 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 31 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 32 extern int pm_schedule_suspend(struct device *dev, unsigned int delay); 33 extern int __pm_runtime_set_status(struct device *dev, unsigned int status); 34 extern int pm_runtime_barrier(struct device *dev); 35 extern void pm_runtime_enable(struct device *dev); 36 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 37 extern void pm_runtime_allow(struct device *dev); 38 extern void pm_runtime_forbid(struct device *dev); 39 extern int pm_generic_runtime_idle(struct device *dev); 40 extern int pm_generic_runtime_suspend(struct device *dev); 41 extern int pm_generic_runtime_resume(struct device *dev); 42 extern void pm_runtime_no_callbacks(struct device *dev); 43 extern void pm_runtime_irq_safe(struct device *dev); 44 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 45 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 46 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); 47 48 static inline bool pm_children_suspended(struct device *dev) 49 { 50 return dev->power.ignore_children 51 || !atomic_read(&dev->power.child_count); 52 } 53 54 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 55 { 56 dev->power.ignore_children = enable; 57 } 58 59 static inline void pm_runtime_get_noresume(struct device *dev) 60 { 61 atomic_inc(&dev->power.usage_count); 62 } 63 64 static inline void pm_runtime_put_noidle(struct device *dev) 65 { 66 atomic_add_unless(&dev->power.usage_count, -1, 0); 67 } 68 69 static inline bool device_run_wake(struct device *dev) 70 { 71 return dev->power.run_wake; 72 } 73 74 static inline void device_set_run_wake(struct device *dev, bool enable) 75 { 76 dev->power.run_wake = enable; 77 } 78 79 static inline bool pm_runtime_suspended(struct device *dev) 80 { 81 return dev->power.runtime_status == RPM_SUSPENDED 82 && !dev->power.disable_depth; 83 } 84 85 static inline bool pm_runtime_enabled(struct device *dev) 86 { 87 return !dev->power.disable_depth; 88 } 89 90 static inline bool pm_runtime_callbacks_present(struct device *dev) 91 { 92 return !dev->power.no_callbacks; 93 } 94 95 static inline void pm_runtime_mark_last_busy(struct device *dev) 96 { 97 ACCESS_ONCE(dev->power.last_busy) = jiffies; 98 } 99 100 #else /* !CONFIG_PM_RUNTIME */ 101 102 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 103 { 104 return -ENOSYS; 105 } 106 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 107 { 108 return -ENOSYS; 109 } 110 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 111 { 112 return 1; 113 } 114 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 115 { 116 return -ENOSYS; 117 } 118 static inline int __pm_runtime_set_status(struct device *dev, 119 unsigned int status) { return 0; } 120 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 121 static inline void pm_runtime_enable(struct device *dev) {} 122 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 123 static inline void pm_runtime_allow(struct device *dev) {} 124 static inline void pm_runtime_forbid(struct device *dev) {} 125 126 static inline bool pm_children_suspended(struct device *dev) { return false; } 127 static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} 128 static inline void pm_runtime_get_noresume(struct device *dev) {} 129 static inline void pm_runtime_put_noidle(struct device *dev) {} 130 static inline bool device_run_wake(struct device *dev) { return false; } 131 static inline void device_set_run_wake(struct device *dev, bool enable) {} 132 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 133 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 134 135 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } 136 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 137 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 138 static inline void pm_runtime_no_callbacks(struct device *dev) {} 139 static inline void pm_runtime_irq_safe(struct device *dev) {} 140 141 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 142 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 143 static inline void __pm_runtime_use_autosuspend(struct device *dev, 144 bool use) {} 145 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 146 int delay) {} 147 static inline unsigned long pm_runtime_autosuspend_expiration( 148 struct device *dev) { return 0; } 149 150 #endif /* !CONFIG_PM_RUNTIME */ 151 152 static inline int pm_runtime_idle(struct device *dev) 153 { 154 return __pm_runtime_idle(dev, 0); 155 } 156 157 static inline int pm_runtime_suspend(struct device *dev) 158 { 159 return __pm_runtime_suspend(dev, 0); 160 } 161 162 static inline int pm_runtime_autosuspend(struct device *dev) 163 { 164 return __pm_runtime_suspend(dev, RPM_AUTO); 165 } 166 167 static inline int pm_runtime_resume(struct device *dev) 168 { 169 return __pm_runtime_resume(dev, 0); 170 } 171 172 static inline int pm_request_idle(struct device *dev) 173 { 174 return __pm_runtime_idle(dev, RPM_ASYNC); 175 } 176 177 static inline int pm_request_resume(struct device *dev) 178 { 179 return __pm_runtime_resume(dev, RPM_ASYNC); 180 } 181 182 static inline int pm_request_autosuspend(struct device *dev) 183 { 184 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 185 } 186 187 static inline int pm_runtime_get(struct device *dev) 188 { 189 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 190 } 191 192 static inline int pm_runtime_get_sync(struct device *dev) 193 { 194 return __pm_runtime_resume(dev, RPM_GET_PUT); 195 } 196 197 static inline int pm_runtime_put(struct device *dev) 198 { 199 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 200 } 201 202 static inline int pm_runtime_put_autosuspend(struct device *dev) 203 { 204 return __pm_runtime_suspend(dev, 205 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 206 } 207 208 static inline int pm_runtime_put_sync(struct device *dev) 209 { 210 return __pm_runtime_idle(dev, RPM_GET_PUT); 211 } 212 213 static inline int pm_runtime_put_sync_suspend(struct device *dev) 214 { 215 return __pm_runtime_suspend(dev, RPM_GET_PUT); 216 } 217 218 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 219 { 220 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 221 } 222 223 static inline int pm_runtime_set_active(struct device *dev) 224 { 225 return __pm_runtime_set_status(dev, RPM_ACTIVE); 226 } 227 228 static inline void pm_runtime_set_suspended(struct device *dev) 229 { 230 __pm_runtime_set_status(dev, RPM_SUSPENDED); 231 } 232 233 static inline void pm_runtime_disable(struct device *dev) 234 { 235 __pm_runtime_disable(dev, true); 236 } 237 238 static inline void pm_runtime_use_autosuspend(struct device *dev) 239 { 240 __pm_runtime_use_autosuspend(dev, true); 241 } 242 243 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 244 { 245 __pm_runtime_use_autosuspend(dev, false); 246 } 247 248 #endif 249