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_suspended_if_enabled(struct device *dev)
106 return pm_runtime_status_suspended(dev) && dev->power.disable_depth == 1;
109 static inline bool pm_runtime_enabled(struct device *dev)
111 return !dev->power.disable_depth;
114 static inline bool pm_runtime_callbacks_present(struct device *dev)
116 return !dev->power.no_callbacks;
119 static inline void pm_runtime_mark_last_busy(struct device *dev)
121 ACCESS_ONCE(dev->power.last_busy) = jiffies;
124 #else /* !CONFIG_PM_RUNTIME */
126 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
130 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
134 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
138 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
142 static inline int __pm_runtime_set_status(struct device *dev,
143 unsigned int status) { return 0; }
144 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
145 static inline void pm_runtime_enable(struct device *dev) {}
146 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
147 static inline void pm_runtime_allow(struct device *dev) {}
148 static inline void pm_runtime_forbid(struct device *dev) {}
150 static inline bool pm_children_suspended(struct device *dev) { return false; }
151 static inline void pm_runtime_get_noresume(struct device *dev) {}
152 static inline void pm_runtime_put_noidle(struct device *dev) {}
153 static inline bool device_run_wake(struct device *dev) { return false; }
154 static inline void device_set_run_wake(struct device *dev, bool enable) {}
155 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
156 static inline bool pm_runtime_active(struct device *dev) { return true; }
157 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
158 static inline bool pm_runtime_suspended_if_enabled(struct device *dev) { return false; }
159 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
161 static inline void pm_runtime_no_callbacks(struct device *dev) {}
162 static inline void pm_runtime_irq_safe(struct device *dev) {}
164 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
165 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
166 static inline void __pm_runtime_use_autosuspend(struct device *dev,
168 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
170 static inline unsigned long pm_runtime_autosuspend_expiration(
171 struct device *dev) { return 0; }
172 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
175 #endif /* !CONFIG_PM_RUNTIME */
177 static inline int pm_runtime_idle(struct device *dev)
179 return __pm_runtime_idle(dev, 0);
182 static inline int pm_runtime_suspend(struct device *dev)
184 return __pm_runtime_suspend(dev, 0);
187 static inline int pm_runtime_autosuspend(struct device *dev)
189 return __pm_runtime_suspend(dev, RPM_AUTO);
192 static inline int pm_runtime_resume(struct device *dev)
194 return __pm_runtime_resume(dev, 0);
197 static inline int pm_request_idle(struct device *dev)
199 return __pm_runtime_idle(dev, RPM_ASYNC);
202 static inline int pm_request_resume(struct device *dev)
204 return __pm_runtime_resume(dev, RPM_ASYNC);
207 static inline int pm_request_autosuspend(struct device *dev)
209 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
212 static inline int pm_runtime_get(struct device *dev)
214 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
217 static inline int pm_runtime_get_sync(struct device *dev)
219 return __pm_runtime_resume(dev, RPM_GET_PUT);
222 static inline int pm_runtime_put(struct device *dev)
224 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
227 static inline int pm_runtime_put_autosuspend(struct device *dev)
229 return __pm_runtime_suspend(dev,
230 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
233 static inline int pm_runtime_put_sync(struct device *dev)
235 return __pm_runtime_idle(dev, RPM_GET_PUT);
238 static inline int pm_runtime_put_sync_suspend(struct device *dev)
240 return __pm_runtime_suspend(dev, RPM_GET_PUT);
243 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
245 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
248 static inline int pm_runtime_set_active(struct device *dev)
250 return __pm_runtime_set_status(dev, RPM_ACTIVE);
253 static inline void pm_runtime_set_suspended(struct device *dev)
255 __pm_runtime_set_status(dev, RPM_SUSPENDED);
258 static inline void pm_runtime_disable(struct device *dev)
260 __pm_runtime_disable(dev, true);
263 static inline void pm_runtime_use_autosuspend(struct device *dev)
265 __pm_runtime_use_autosuspend(dev, true);
268 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
270 __pm_runtime_use_autosuspend(dev, false);