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