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);
30 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
31 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
34 #ifdef CONFIG_PM_RUNTIME
36 extern struct workqueue_struct *pm_wq;
38 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
39 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
40 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
41 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
42 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
43 extern int pm_runtime_barrier(struct device *dev);
44 extern void pm_runtime_enable(struct device *dev);
45 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
46 extern void pm_runtime_allow(struct device *dev);
47 extern void pm_runtime_forbid(struct device *dev);
48 extern void pm_runtime_no_callbacks(struct device *dev);
49 extern void pm_runtime_irq_safe(struct device *dev);
50 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
51 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
52 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
53 extern void pm_runtime_update_max_time_suspended(struct device *dev,
55 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
57 static inline bool pm_children_suspended(struct device *dev)
59 return dev->power.ignore_children
60 || !atomic_read(&dev->power.child_count);
63 static inline void pm_runtime_get_noresume(struct device *dev)
65 atomic_inc(&dev->power.usage_count);
68 static inline void pm_runtime_put_noidle(struct device *dev)
70 atomic_add_unless(&dev->power.usage_count, -1, 0);
73 static inline bool device_run_wake(struct device *dev)
75 return dev->power.run_wake;
78 static inline void device_set_run_wake(struct device *dev, bool enable)
80 dev->power.run_wake = enable;
83 static inline bool pm_runtime_suspended(struct device *dev)
85 return dev->power.runtime_status == RPM_SUSPENDED
86 && !dev->power.disable_depth;
89 static inline bool pm_runtime_active(struct device *dev)
91 return dev->power.runtime_status == RPM_ACTIVE
92 || dev->power.disable_depth;
95 static inline bool pm_runtime_status_suspended(struct device *dev)
97 return dev->power.runtime_status == RPM_SUSPENDED;
100 static inline bool pm_runtime_enabled(struct device *dev)
102 return !dev->power.disable_depth;
105 static inline bool pm_runtime_callbacks_present(struct device *dev)
107 return !dev->power.no_callbacks;
110 static inline void pm_runtime_mark_last_busy(struct device *dev)
112 ACCESS_ONCE(dev->power.last_busy) = jiffies;
115 #else /* !CONFIG_PM_RUNTIME */
117 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
121 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
125 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
129 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
133 static inline int __pm_runtime_set_status(struct device *dev,
134 unsigned int status) { return 0; }
135 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
136 static inline void pm_runtime_enable(struct device *dev) {}
137 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
138 static inline void pm_runtime_allow(struct device *dev) {}
139 static inline void pm_runtime_forbid(struct device *dev) {}
141 static inline bool pm_children_suspended(struct device *dev) { return false; }
142 static inline void pm_runtime_get_noresume(struct device *dev) {}
143 static inline void pm_runtime_put_noidle(struct device *dev) {}
144 static inline bool device_run_wake(struct device *dev) { return false; }
145 static inline void device_set_run_wake(struct device *dev, bool enable) {}
146 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
147 static inline bool pm_runtime_active(struct device *dev) { return true; }
148 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
149 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
151 static inline void pm_runtime_no_callbacks(struct device *dev) {}
152 static inline void pm_runtime_irq_safe(struct device *dev) {}
154 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
155 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
156 static inline void __pm_runtime_use_autosuspend(struct device *dev,
158 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
160 static inline unsigned long pm_runtime_autosuspend_expiration(
161 struct device *dev) { return 0; }
162 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
165 #endif /* !CONFIG_PM_RUNTIME */
167 static inline int pm_runtime_idle(struct device *dev)
169 return __pm_runtime_idle(dev, 0);
172 static inline int pm_runtime_suspend(struct device *dev)
174 return __pm_runtime_suspend(dev, 0);
177 static inline int pm_runtime_autosuspend(struct device *dev)
179 return __pm_runtime_suspend(dev, RPM_AUTO);
182 static inline int pm_runtime_resume(struct device *dev)
184 return __pm_runtime_resume(dev, 0);
187 static inline int pm_request_idle(struct device *dev)
189 return __pm_runtime_idle(dev, RPM_ASYNC);
192 static inline int pm_request_resume(struct device *dev)
194 return __pm_runtime_resume(dev, RPM_ASYNC);
197 static inline int pm_request_autosuspend(struct device *dev)
199 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
202 static inline int pm_runtime_get(struct device *dev)
204 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
207 static inline int pm_runtime_get_sync(struct device *dev)
209 return __pm_runtime_resume(dev, RPM_GET_PUT);
212 static inline int pm_runtime_put(struct device *dev)
214 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
217 static inline int pm_runtime_put_autosuspend(struct device *dev)
219 return __pm_runtime_suspend(dev,
220 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
223 static inline int pm_runtime_put_sync(struct device *dev)
225 return __pm_runtime_idle(dev, RPM_GET_PUT);
228 static inline int pm_runtime_put_sync_suspend(struct device *dev)
230 return __pm_runtime_suspend(dev, RPM_GET_PUT);
233 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
235 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
238 static inline int pm_runtime_set_active(struct device *dev)
240 return __pm_runtime_set_status(dev, RPM_ACTIVE);
243 static inline void pm_runtime_set_suspended(struct device *dev)
245 __pm_runtime_set_status(dev, RPM_SUSPENDED);
248 static inline void pm_runtime_disable(struct device *dev)
250 __pm_runtime_disable(dev, true);
253 static inline void pm_runtime_use_autosuspend(struct device *dev)
255 __pm_runtime_use_autosuspend(dev, true);
258 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
260 __pm_runtime_use_autosuspend(dev, false);