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 */
26 #ifdef CONFIG_PM_RUNTIME
28 extern struct workqueue_struct *pm_wq;
30 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
31 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
32 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
33 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
34 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
35 extern int pm_runtime_barrier(struct device *dev);
36 extern void pm_runtime_enable(struct device *dev);
37 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
38 extern void pm_runtime_allow(struct device *dev);
39 extern void pm_runtime_forbid(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);
47 extern void pm_runtime_update_max_time_suspended(struct device *dev,
49 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
51 static inline bool pm_children_suspended(struct device *dev)
53 return dev->power.ignore_children
54 || !atomic_read(&dev->power.child_count);
57 static inline void pm_runtime_get_noresume(struct device *dev)
59 atomic_inc(&dev->power.usage_count);
62 static inline void pm_runtime_put_noidle(struct device *dev)
64 atomic_add_unless(&dev->power.usage_count, -1, 0);
67 static inline bool device_run_wake(struct device *dev)
69 return dev->power.run_wake;
72 static inline void device_set_run_wake(struct device *dev, bool enable)
74 dev->power.run_wake = enable;
77 static inline bool pm_runtime_suspended(struct device *dev)
79 return dev->power.runtime_status == RPM_SUSPENDED
80 && !dev->power.disable_depth;
83 static inline bool pm_runtime_active(struct device *dev)
85 return dev->power.runtime_status == RPM_ACTIVE
86 || dev->power.disable_depth;
89 static inline bool pm_runtime_status_suspended(struct device *dev)
91 return dev->power.runtime_status == RPM_SUSPENDED;
94 static inline bool pm_runtime_enabled(struct device *dev)
96 return !dev->power.disable_depth;
99 static inline bool pm_runtime_callbacks_present(struct device *dev)
101 return !dev->power.no_callbacks;
104 static inline void pm_runtime_mark_last_busy(struct device *dev)
106 ACCESS_ONCE(dev->power.last_busy) = jiffies;
109 #else /* !CONFIG_PM_RUNTIME */
111 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
115 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
119 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
123 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
127 static inline int __pm_runtime_set_status(struct device *dev,
128 unsigned int status) { return 0; }
129 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
130 static inline void pm_runtime_enable(struct device *dev) {}
131 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
132 static inline void pm_runtime_allow(struct device *dev) {}
133 static inline void pm_runtime_forbid(struct device *dev) {}
135 static inline bool pm_children_suspended(struct device *dev) { return false; }
136 static inline void pm_runtime_get_noresume(struct device *dev) {}
137 static inline void pm_runtime_put_noidle(struct device *dev) {}
138 static inline bool device_run_wake(struct device *dev) { return false; }
139 static inline void device_set_run_wake(struct device *dev, bool enable) {}
140 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
141 static inline bool pm_runtime_active(struct device *dev) { return true; }
142 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
143 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
145 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
146 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
147 static inline void pm_runtime_no_callbacks(struct device *dev) {}
148 static inline void pm_runtime_irq_safe(struct device *dev) {}
150 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
151 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
152 static inline void __pm_runtime_use_autosuspend(struct device *dev,
154 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
156 static inline unsigned long pm_runtime_autosuspend_expiration(
157 struct device *dev) { return 0; }
158 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
161 #endif /* !CONFIG_PM_RUNTIME */
163 static inline int pm_runtime_idle(struct device *dev)
165 return __pm_runtime_idle(dev, 0);
168 static inline int pm_runtime_suspend(struct device *dev)
170 return __pm_runtime_suspend(dev, 0);
173 static inline int pm_runtime_autosuspend(struct device *dev)
175 return __pm_runtime_suspend(dev, RPM_AUTO);
178 static inline int pm_runtime_resume(struct device *dev)
180 return __pm_runtime_resume(dev, 0);
183 static inline int pm_request_idle(struct device *dev)
185 return __pm_runtime_idle(dev, RPM_ASYNC);
188 static inline int pm_request_resume(struct device *dev)
190 return __pm_runtime_resume(dev, RPM_ASYNC);
193 static inline int pm_request_autosuspend(struct device *dev)
195 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
198 static inline int pm_runtime_get(struct device *dev)
200 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
203 static inline int pm_runtime_get_sync(struct device *dev)
205 return __pm_runtime_resume(dev, RPM_GET_PUT);
208 static inline int pm_runtime_put(struct device *dev)
210 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
213 static inline int pm_runtime_put_autosuspend(struct device *dev)
215 return __pm_runtime_suspend(dev,
216 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
219 static inline int pm_runtime_put_sync(struct device *dev)
221 return __pm_runtime_idle(dev, RPM_GET_PUT);
224 static inline int pm_runtime_put_sync_suspend(struct device *dev)
226 return __pm_runtime_suspend(dev, RPM_GET_PUT);
229 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
231 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
234 static inline int pm_runtime_set_active(struct device *dev)
236 return __pm_runtime_set_status(dev, RPM_ACTIVE);
239 static inline void pm_runtime_set_suspended(struct device *dev)
241 __pm_runtime_set_status(dev, RPM_SUSPENDED);
244 static inline void pm_runtime_disable(struct device *dev)
246 __pm_runtime_disable(dev, true);
249 static inline void pm_runtime_use_autosuspend(struct device *dev)
251 __pm_runtime_use_autosuspend(dev, true);
254 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
256 __pm_runtime_use_autosuspend(dev, false);