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);
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