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_status_suspended(struct device *dev) 86 { 87 return dev->power.runtime_status == RPM_SUSPENDED; 88 } 89 90 static inline bool pm_runtime_enabled(struct device *dev) 91 { 92 return !dev->power.disable_depth; 93 } 94 95 static inline bool pm_runtime_callbacks_present(struct device *dev) 96 { 97 return !dev->power.no_callbacks; 98 } 99 100 static inline void pm_runtime_mark_last_busy(struct device *dev) 101 { 102 ACCESS_ONCE(dev->power.last_busy) = jiffies; 103 } 104 105 #else /* !CONFIG_PM_RUNTIME */ 106 107 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 108 { 109 return -ENOSYS; 110 } 111 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 112 { 113 return -ENOSYS; 114 } 115 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 116 { 117 return 1; 118 } 119 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 120 { 121 return -ENOSYS; 122 } 123 static inline int __pm_runtime_set_status(struct device *dev, 124 unsigned int status) { return 0; } 125 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 126 static inline void pm_runtime_enable(struct device *dev) {} 127 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 128 static inline void pm_runtime_allow(struct device *dev) {} 129 static inline void pm_runtime_forbid(struct device *dev) {} 130 131 static inline bool pm_children_suspended(struct device *dev) { return false; } 132 static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} 133 static inline void pm_runtime_get_noresume(struct device *dev) {} 134 static inline void pm_runtime_put_noidle(struct device *dev) {} 135 static inline bool device_run_wake(struct device *dev) { return false; } 136 static inline void device_set_run_wake(struct device *dev, bool enable) {} 137 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 138 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 139 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 140 141 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } 142 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 143 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 144 static inline void pm_runtime_no_callbacks(struct device *dev) {} 145 static inline void pm_runtime_irq_safe(struct device *dev) {} 146 147 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 148 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 149 static inline void __pm_runtime_use_autosuspend(struct device *dev, 150 bool use) {} 151 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 152 int delay) {} 153 static inline unsigned long pm_runtime_autosuspend_expiration( 154 struct device *dev) { return 0; } 155 156 #endif /* !CONFIG_PM_RUNTIME */ 157 158 static inline int pm_runtime_idle(struct device *dev) 159 { 160 return __pm_runtime_idle(dev, 0); 161 } 162 163 static inline int pm_runtime_suspend(struct device *dev) 164 { 165 return __pm_runtime_suspend(dev, 0); 166 } 167 168 static inline int pm_runtime_autosuspend(struct device *dev) 169 { 170 return __pm_runtime_suspend(dev, RPM_AUTO); 171 } 172 173 static inline int pm_runtime_resume(struct device *dev) 174 { 175 return __pm_runtime_resume(dev, 0); 176 } 177 178 static inline int pm_request_idle(struct device *dev) 179 { 180 return __pm_runtime_idle(dev, RPM_ASYNC); 181 } 182 183 static inline int pm_request_resume(struct device *dev) 184 { 185 return __pm_runtime_resume(dev, RPM_ASYNC); 186 } 187 188 static inline int pm_request_autosuspend(struct device *dev) 189 { 190 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 191 } 192 193 static inline int pm_runtime_get(struct device *dev) 194 { 195 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 196 } 197 198 static inline int pm_runtime_get_sync(struct device *dev) 199 { 200 return __pm_runtime_resume(dev, RPM_GET_PUT); 201 } 202 203 static inline int pm_runtime_put(struct device *dev) 204 { 205 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 206 } 207 208 static inline int pm_runtime_put_autosuspend(struct device *dev) 209 { 210 return __pm_runtime_suspend(dev, 211 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 212 } 213 214 static inline int pm_runtime_put_sync(struct device *dev) 215 { 216 return __pm_runtime_idle(dev, RPM_GET_PUT); 217 } 218 219 static inline int pm_runtime_put_sync_suspend(struct device *dev) 220 { 221 return __pm_runtime_suspend(dev, RPM_GET_PUT); 222 } 223 224 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 225 { 226 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 227 } 228 229 static inline int pm_runtime_set_active(struct device *dev) 230 { 231 return __pm_runtime_set_status(dev, RPM_ACTIVE); 232 } 233 234 static inline void pm_runtime_set_suspended(struct device *dev) 235 { 236 __pm_runtime_set_status(dev, RPM_SUSPENDED); 237 } 238 239 static inline void pm_runtime_disable(struct device *dev) 240 { 241 __pm_runtime_disable(dev, true); 242 } 243 244 static inline void pm_runtime_use_autosuspend(struct device *dev) 245 { 246 __pm_runtime_use_autosuspend(dev, true); 247 } 248 249 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 250 { 251 __pm_runtime_use_autosuspend(dev, false); 252 } 253 254 struct pm_clk_notifier_block { 255 struct notifier_block nb; 256 struct dev_pm_domain *pm_domain; 257 char *con_ids[]; 258 }; 259 260 #ifdef CONFIG_PM_CLK 261 extern int pm_clk_init(struct device *dev); 262 extern void pm_clk_destroy(struct device *dev); 263 extern int pm_clk_add(struct device *dev, const char *con_id); 264 extern void pm_clk_remove(struct device *dev, const char *con_id); 265 extern int pm_clk_suspend(struct device *dev); 266 extern int pm_clk_resume(struct device *dev); 267 #else 268 static inline int pm_clk_init(struct device *dev) 269 { 270 return -EINVAL; 271 } 272 static inline void pm_clk_destroy(struct device *dev) 273 { 274 } 275 static inline int pm_clk_add(struct device *dev, const char *con_id) 276 { 277 return -EINVAL; 278 } 279 static inline void pm_clk_remove(struct device *dev, const char *con_id) 280 { 281 } 282 #define pm_clk_suspend NULL 283 #define pm_clk_resume NULL 284 #endif 285 286 #ifdef CONFIG_HAVE_CLK 287 extern void pm_clk_add_notifier(struct bus_type *bus, 288 struct pm_clk_notifier_block *clknb); 289 #else 290 static inline void pm_clk_add_notifier(struct bus_type *bus, 291 struct pm_clk_notifier_block *clknb) 292 { 293 } 294 #endif 295 296 #endif 297