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 struct workqueue_struct *pm_wq;
29 static inline bool queue_pm_work(struct work_struct *work)
31 return queue_work(pm_wq, work);
34 extern int pm_generic_runtime_suspend(struct device *dev);
35 extern int pm_generic_runtime_resume(struct device *dev);
36 extern int pm_runtime_force_suspend(struct device *dev);
37 extern int pm_runtime_force_resume(struct device *dev);
39 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
40 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
41 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
42 extern int pm_runtime_get_if_in_use(struct device *dev);
43 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
44 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
45 extern int pm_runtime_barrier(struct device *dev);
46 extern void pm_runtime_enable(struct device *dev);
47 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
48 extern void pm_runtime_allow(struct device *dev);
49 extern void pm_runtime_forbid(struct device *dev);
50 extern void pm_runtime_no_callbacks(struct device *dev);
51 extern void pm_runtime_irq_safe(struct device *dev);
52 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
53 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
54 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
55 extern void pm_runtime_update_max_time_suspended(struct device *dev,
57 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
59 static inline bool pm_children_suspended(struct device *dev)
61 return dev->power.ignore_children
62 || !atomic_read(&dev->power.child_count);
65 static inline void pm_runtime_get_noresume(struct device *dev)
67 atomic_inc(&dev->power.usage_count);
70 static inline void pm_runtime_put_noidle(struct device *dev)
72 atomic_add_unless(&dev->power.usage_count, -1, 0);
75 static inline bool device_run_wake(struct device *dev)
77 return dev->power.run_wake;
80 static inline void device_set_run_wake(struct device *dev, bool enable)
82 dev->power.run_wake = enable;
85 static inline bool pm_runtime_suspended(struct device *dev)
87 return dev->power.runtime_status == RPM_SUSPENDED
88 && !dev->power.disable_depth;
91 static inline bool pm_runtime_active(struct device *dev)
93 return dev->power.runtime_status == RPM_ACTIVE
94 || dev->power.disable_depth;
97 static inline bool pm_runtime_status_suspended(struct device *dev)
99 return dev->power.runtime_status == RPM_SUSPENDED;
102 static inline bool pm_runtime_enabled(struct device *dev)
104 return !dev->power.disable_depth;
107 static inline bool pm_runtime_callbacks_present(struct device *dev)
109 return !dev->power.no_callbacks;
112 static inline void pm_runtime_mark_last_busy(struct device *dev)
114 ACCESS_ONCE(dev->power.last_busy) = jiffies;
117 static inline bool pm_runtime_is_irq_safe(struct device *dev)
119 return dev->power.irq_safe;
122 #else /* !CONFIG_PM */
124 static inline bool queue_pm_work(struct work_struct *work) { return false; }
126 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
127 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
128 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
129 static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
131 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
135 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
139 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
143 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
147 static inline int pm_runtime_get_if_in_use(struct device *dev)
151 static inline int __pm_runtime_set_status(struct device *dev,
152 unsigned int status) { return 0; }
153 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
154 static inline void pm_runtime_enable(struct device *dev) {}
155 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
156 static inline void pm_runtime_allow(struct device *dev) {}
157 static inline void pm_runtime_forbid(struct device *dev) {}
159 static inline bool pm_children_suspended(struct device *dev) { return false; }
160 static inline void pm_runtime_get_noresume(struct device *dev) {}
161 static inline void pm_runtime_put_noidle(struct device *dev) {}
162 static inline bool device_run_wake(struct device *dev) { return false; }
163 static inline void device_set_run_wake(struct device *dev, bool enable) {}
164 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
165 static inline bool pm_runtime_active(struct device *dev) { return true; }
166 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
167 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
169 static inline void pm_runtime_no_callbacks(struct device *dev) {}
170 static inline void pm_runtime_irq_safe(struct device *dev) {}
171 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
173 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
174 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
175 static inline void __pm_runtime_use_autosuspend(struct device *dev,
177 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
179 static inline unsigned long pm_runtime_autosuspend_expiration(
180 struct device *dev) { return 0; }
181 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
184 #endif /* !CONFIG_PM */
186 static inline int pm_runtime_idle(struct device *dev)
188 return __pm_runtime_idle(dev, 0);
191 static inline int pm_runtime_suspend(struct device *dev)
193 return __pm_runtime_suspend(dev, 0);
196 static inline int pm_runtime_autosuspend(struct device *dev)
198 return __pm_runtime_suspend(dev, RPM_AUTO);
201 static inline int pm_runtime_resume(struct device *dev)
203 return __pm_runtime_resume(dev, 0);
206 static inline int pm_request_idle(struct device *dev)
208 return __pm_runtime_idle(dev, RPM_ASYNC);
211 static inline int pm_request_resume(struct device *dev)
213 return __pm_runtime_resume(dev, RPM_ASYNC);
216 static inline int pm_request_autosuspend(struct device *dev)
218 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
221 static inline int pm_runtime_get(struct device *dev)
223 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
226 static inline int pm_runtime_get_sync(struct device *dev)
228 return __pm_runtime_resume(dev, RPM_GET_PUT);
231 static inline int pm_runtime_put(struct device *dev)
233 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
236 static inline int pm_runtime_put_autosuspend(struct device *dev)
238 return __pm_runtime_suspend(dev,
239 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
242 static inline int pm_runtime_put_sync(struct device *dev)
244 return __pm_runtime_idle(dev, RPM_GET_PUT);
247 static inline int pm_runtime_put_sync_suspend(struct device *dev)
249 return __pm_runtime_suspend(dev, RPM_GET_PUT);
252 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
254 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
257 static inline int pm_runtime_set_active(struct device *dev)
259 return __pm_runtime_set_status(dev, RPM_ACTIVE);
262 static inline void pm_runtime_set_suspended(struct device *dev)
264 __pm_runtime_set_status(dev, RPM_SUSPENDED);
267 static inline void pm_runtime_disable(struct device *dev)
269 __pm_runtime_disable(dev, true);
272 static inline void pm_runtime_use_autosuspend(struct device *dev)
274 __pm_runtime_use_autosuspend(dev, true);
277 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
279 __pm_runtime_use_autosuspend(dev, false);