2 * pm_runtime.h - Device run-time power management helper functions.
4 * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
6 * This file is released under the GPLv2.
9 #ifndef _LINUX_PM_RUNTIME_H
10 #define _LINUX_PM_RUNTIME_H
12 #include <linux/device.h>
13 #include <linux/notifier.h>
16 #include <linux/jiffies.h>
18 /* Runtime PM flag argument bits */
19 #define RPM_ASYNC 0x01 /* Request is asynchronous */
20 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent
22 #define RPM_GET_PUT 0x04 /* Increment/decrement the
24 #define RPM_AUTO 0x08 /* Use autosuspend_delay */
27 extern int pm_generic_runtime_suspend(struct device *dev);
28 extern int pm_generic_runtime_resume(struct device *dev);
29 extern int pm_runtime_force_suspend(struct device *dev);
30 extern int pm_runtime_force_resume(struct device *dev);
32 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
33 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
34 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
35 static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
38 #ifdef CONFIG_PM_RUNTIME
40 extern struct workqueue_struct *pm_wq;
42 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
43 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
44 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
45 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
46 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
47 extern int pm_runtime_barrier(struct device *dev);
48 extern void pm_runtime_enable(struct device *dev);
49 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
50 extern void pm_runtime_allow(struct device *dev);
51 extern void pm_runtime_forbid(struct device *dev);
52 extern void pm_runtime_no_callbacks(struct device *dev);
53 extern void pm_runtime_irq_safe(struct device *dev);
54 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
55 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
56 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
57 extern void pm_runtime_update_max_time_suspended(struct device *dev,
59 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
61 static inline bool pm_children_suspended(struct device *dev)
63 return dev->power.ignore_children
64 || !atomic_read(&dev->power.child_count);
67 static inline void pm_runtime_get_noresume(struct device *dev)
69 atomic_inc(&dev->power.usage_count);
72 static inline void pm_runtime_put_noidle(struct device *dev)
74 atomic_add_unless(&dev->power.usage_count, -1, 0);
77 static inline bool device_run_wake(struct device *dev)
79 return dev->power.run_wake;
82 static inline void device_set_run_wake(struct device *dev, bool enable)
84 dev->power.run_wake = enable;
87 static inline bool pm_runtime_suspended(struct device *dev)
89 return dev->power.runtime_status == RPM_SUSPENDED
90 && !dev->power.disable_depth;
93 static inline bool pm_runtime_active(struct device *dev)
95 return dev->power.runtime_status == RPM_ACTIVE
96 || dev->power.disable_depth;
99 static inline bool pm_runtime_status_suspended(struct device *dev)
101 return dev->power.runtime_status == RPM_SUSPENDED;
104 static inline bool pm_runtime_enabled(struct device *dev)
106 return !dev->power.disable_depth;
109 static inline bool pm_runtime_callbacks_present(struct device *dev)
111 return !dev->power.no_callbacks;
114 static inline void pm_runtime_mark_last_busy(struct device *dev)
116 ACCESS_ONCE(dev->power.last_busy) = jiffies;
119 #else /* !CONFIG_PM_RUNTIME */
121 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
125 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
129 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
133 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
137 static inline int __pm_runtime_set_status(struct device *dev,
138 unsigned int status) { return 0; }
139 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
140 static inline void pm_runtime_enable(struct device *dev) {}
141 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
142 static inline void pm_runtime_allow(struct device *dev) {}
143 static inline void pm_runtime_forbid(struct device *dev) {}
145 static inline bool pm_children_suspended(struct device *dev) { return false; }
146 static inline void pm_runtime_get_noresume(struct device *dev) {}
147 static inline void pm_runtime_put_noidle(struct device *dev) {}
148 static inline bool device_run_wake(struct device *dev) { return false; }
149 static inline void device_set_run_wake(struct device *dev, bool enable) {}
150 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
151 static inline bool pm_runtime_active(struct device *dev) { return true; }
152 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
153 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
155 static inline void pm_runtime_no_callbacks(struct device *dev) {}
156 static inline void pm_runtime_irq_safe(struct device *dev) {}
158 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
159 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
160 static inline void __pm_runtime_use_autosuspend(struct device *dev,
162 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
164 static inline unsigned long pm_runtime_autosuspend_expiration(
165 struct device *dev) { return 0; }
166 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
169 #endif /* !CONFIG_PM_RUNTIME */
171 static inline int pm_runtime_idle(struct device *dev)
173 return __pm_runtime_idle(dev, 0);
176 static inline int pm_runtime_suspend(struct device *dev)
178 return __pm_runtime_suspend(dev, 0);
181 static inline int pm_runtime_autosuspend(struct device *dev)
183 return __pm_runtime_suspend(dev, RPM_AUTO);
186 static inline int pm_runtime_resume(struct device *dev)
188 return __pm_runtime_resume(dev, 0);
191 static inline int pm_request_idle(struct device *dev)
193 return __pm_runtime_idle(dev, RPM_ASYNC);
196 static inline int pm_request_resume(struct device *dev)
198 return __pm_runtime_resume(dev, RPM_ASYNC);
201 static inline int pm_request_autosuspend(struct device *dev)
203 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
206 static inline int pm_runtime_get(struct device *dev)
208 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
211 static inline int pm_runtime_get_sync(struct device *dev)
213 return __pm_runtime_resume(dev, RPM_GET_PUT);
216 static inline int pm_runtime_put(struct device *dev)
218 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
221 static inline int pm_runtime_put_autosuspend(struct device *dev)
223 return __pm_runtime_suspend(dev,
224 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
227 static inline int pm_runtime_put_sync(struct device *dev)
229 return __pm_runtime_idle(dev, RPM_GET_PUT);
232 static inline int pm_runtime_put_sync_suspend(struct device *dev)
234 return __pm_runtime_suspend(dev, RPM_GET_PUT);
237 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
239 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
242 static inline int pm_runtime_set_active(struct device *dev)
244 return __pm_runtime_set_status(dev, RPM_ACTIVE);
247 static inline void pm_runtime_set_suspended(struct device *dev)
249 __pm_runtime_set_status(dev, RPM_SUSPENDED);
252 static inline void pm_runtime_disable(struct device *dev)
254 __pm_runtime_disable(dev, true);
257 static inline void pm_runtime_use_autosuspend(struct device *dev)
259 __pm_runtime_use_autosuspend(dev, true);
262 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
264 __pm_runtime_use_autosuspend(dev, false);