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>
15 #include <linux/jiffies.h>
17 /* Runtime PM flag argument bits */
18 #define RPM_ASYNC 0x01 /* Request is asynchronous */
19 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent
21 #define RPM_GET_PUT 0x04 /* Increment/decrement the
23 #define RPM_AUTO 0x08 /* Use autosuspend_delay */
25 #ifdef CONFIG_PM_RUNTIME
27 extern struct workqueue_struct *pm_wq;
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);
48 static inline bool pm_children_suspended(struct device *dev)
50 return dev->power.ignore_children
51 || !atomic_read(&dev->power.child_count);
54 static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
56 dev->power.ignore_children = enable;
59 static inline void pm_runtime_get_noresume(struct device *dev)
61 atomic_inc(&dev->power.usage_count);
64 static inline void pm_runtime_put_noidle(struct device *dev)
66 atomic_add_unless(&dev->power.usage_count, -1, 0);
69 static inline bool device_run_wake(struct device *dev)
71 return dev->power.run_wake;
74 static inline void device_set_run_wake(struct device *dev, bool enable)
76 dev->power.run_wake = enable;
79 static inline bool pm_runtime_suspended(struct device *dev)
81 return dev->power.runtime_status == RPM_SUSPENDED
82 && !dev->power.disable_depth;
85 static inline bool pm_runtime_enabled(struct device *dev)
87 return !dev->power.disable_depth;
90 static inline bool pm_runtime_callbacks_present(struct device *dev)
92 return !dev->power.no_callbacks;
95 static inline void pm_runtime_mark_last_busy(struct device *dev)
97 ACCESS_ONCE(dev->power.last_busy) = jiffies;
100 #else /* !CONFIG_PM_RUNTIME */
102 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
106 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
110 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
114 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
118 static inline int __pm_runtime_set_status(struct device *dev,
119 unsigned int status) { return 0; }
120 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
121 static inline void pm_runtime_enable(struct device *dev) {}
122 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
123 static inline void pm_runtime_allow(struct device *dev) {}
124 static inline void pm_runtime_forbid(struct device *dev) {}
126 static inline bool pm_children_suspended(struct device *dev) { return false; }
127 static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
128 static inline void pm_runtime_get_noresume(struct device *dev) {}
129 static inline void pm_runtime_put_noidle(struct device *dev) {}
130 static inline bool device_run_wake(struct device *dev) { return false; }
131 static inline void device_set_run_wake(struct device *dev, bool enable) {}
132 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
133 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
135 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
136 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
137 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
138 static inline void pm_runtime_no_callbacks(struct device *dev) {}
139 static inline void pm_runtime_irq_safe(struct device *dev) {}
141 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
142 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
143 static inline void __pm_runtime_use_autosuspend(struct device *dev,
145 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
147 static inline unsigned long pm_runtime_autosuspend_expiration(
148 struct device *dev) { return 0; }
150 #endif /* !CONFIG_PM_RUNTIME */
152 static inline int pm_runtime_idle(struct device *dev)
154 return __pm_runtime_idle(dev, 0);
157 static inline int pm_runtime_suspend(struct device *dev)
159 return __pm_runtime_suspend(dev, 0);
162 static inline int pm_runtime_autosuspend(struct device *dev)
164 return __pm_runtime_suspend(dev, RPM_AUTO);
167 static inline int pm_runtime_resume(struct device *dev)
169 return __pm_runtime_resume(dev, 0);
172 static inline int pm_request_idle(struct device *dev)
174 return __pm_runtime_idle(dev, RPM_ASYNC);
177 static inline int pm_request_resume(struct device *dev)
179 return __pm_runtime_resume(dev, RPM_ASYNC);
182 static inline int pm_request_autosuspend(struct device *dev)
184 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
187 static inline int pm_runtime_get(struct device *dev)
189 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
192 static inline int pm_runtime_get_sync(struct device *dev)
194 return __pm_runtime_resume(dev, RPM_GET_PUT);
197 static inline int pm_runtime_put(struct device *dev)
199 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
202 static inline int pm_runtime_put_autosuspend(struct device *dev)
204 return __pm_runtime_suspend(dev,
205 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
208 static inline int pm_runtime_put_sync(struct device *dev)
210 return __pm_runtime_idle(dev, RPM_GET_PUT);
213 static inline int pm_runtime_put_sync_suspend(struct device *dev)
215 return __pm_runtime_suspend(dev, RPM_GET_PUT);
218 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
220 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
223 static inline int pm_runtime_set_active(struct device *dev)
225 return __pm_runtime_set_status(dev, RPM_ACTIVE);
228 static inline void pm_runtime_set_suspended(struct device *dev)
230 __pm_runtime_set_status(dev, RPM_SUSPENDED);
233 static inline void pm_runtime_disable(struct device *dev)
235 __pm_runtime_disable(dev, true);
238 static inline void pm_runtime_use_autosuspend(struct device *dev)
240 __pm_runtime_use_autosuspend(dev, true);
243 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
245 __pm_runtime_use_autosuspend(dev, false);