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_enabled(struct device
*dev
)
106 return !dev
->power
.disable_depth
;
109 static inline bool pm_runtime_callbacks_present(struct device
*dev
)
111 return !dev
->power
.no_callbacks
;
114 static inline void pm_runtime_mark_last_busy(struct device
*dev
)
116 ACCESS_ONCE(dev
->power
.last_busy
) = jiffies
;
119 #else /* !CONFIG_PM_RUNTIME */
121 static inline int __pm_runtime_idle(struct device
*dev
, int rpmflags
)
125 static inline int __pm_runtime_suspend(struct device
*dev
, int rpmflags
)
129 static inline int __pm_runtime_resume(struct device
*dev
, int rpmflags
)
133 static inline int pm_schedule_suspend(struct device
*dev
, unsigned int delay
)
137 static inline int __pm_runtime_set_status(struct device
*dev
,
138 unsigned int status
) { return 0; }
139 static inline int pm_runtime_barrier(struct device
*dev
) { return 0; }
140 static inline void pm_runtime_enable(struct device
*dev
) {}
141 static inline void __pm_runtime_disable(struct device
*dev
, bool c
) {}
142 static inline void pm_runtime_allow(struct device
*dev
) {}
143 static inline void pm_runtime_forbid(struct device
*dev
) {}
145 static inline bool pm_children_suspended(struct device
*dev
) { return false; }
146 static inline void pm_runtime_get_noresume(struct device
*dev
) {}
147 static inline void pm_runtime_put_noidle(struct device
*dev
) {}
148 static inline bool device_run_wake(struct device
*dev
) { return false; }
149 static inline void device_set_run_wake(struct device
*dev
, bool enable
) {}
150 static inline bool pm_runtime_suspended(struct device
*dev
) { return false; }
151 static inline bool pm_runtime_active(struct device
*dev
) { return true; }
152 static inline bool pm_runtime_status_suspended(struct device
*dev
) { return false; }
153 static inline bool pm_runtime_enabled(struct device
*dev
) { return false; }
155 static inline void pm_runtime_no_callbacks(struct device
*dev
) {}
156 static inline void pm_runtime_irq_safe(struct device
*dev
) {}
158 static inline bool pm_runtime_callbacks_present(struct device
*dev
) { return false; }
159 static inline void pm_runtime_mark_last_busy(struct device
*dev
) {}
160 static inline void __pm_runtime_use_autosuspend(struct device
*dev
,
162 static inline void pm_runtime_set_autosuspend_delay(struct device
*dev
,
164 static inline unsigned long pm_runtime_autosuspend_expiration(
165 struct device
*dev
) { return 0; }
166 static inline void pm_runtime_set_memalloc_noio(struct device
*dev
,
169 #endif /* !CONFIG_PM_RUNTIME */
171 static inline int pm_runtime_idle(struct device
*dev
)
173 return __pm_runtime_idle(dev
, 0);
176 static inline int pm_runtime_suspend(struct device
*dev
)
178 return __pm_runtime_suspend(dev
, 0);
181 static inline int pm_runtime_autosuspend(struct device
*dev
)
183 return __pm_runtime_suspend(dev
, RPM_AUTO
);
186 static inline int pm_runtime_resume(struct device
*dev
)
188 return __pm_runtime_resume(dev
, 0);
191 static inline int pm_request_idle(struct device
*dev
)
193 return __pm_runtime_idle(dev
, RPM_ASYNC
);
196 static inline int pm_request_resume(struct device
*dev
)
198 return __pm_runtime_resume(dev
, RPM_ASYNC
);
201 static inline int pm_request_autosuspend(struct device
*dev
)
203 return __pm_runtime_suspend(dev
, RPM_ASYNC
| RPM_AUTO
);
206 static inline int pm_runtime_get(struct device
*dev
)
208 return __pm_runtime_resume(dev
, RPM_GET_PUT
| RPM_ASYNC
);
211 static inline int pm_runtime_get_sync(struct device
*dev
)
213 return __pm_runtime_resume(dev
, RPM_GET_PUT
);
216 static inline int pm_runtime_put(struct device
*dev
)
218 return __pm_runtime_idle(dev
, RPM_GET_PUT
| RPM_ASYNC
);
221 static inline int pm_runtime_put_autosuspend(struct device
*dev
)
223 return __pm_runtime_suspend(dev
,
224 RPM_GET_PUT
| RPM_ASYNC
| RPM_AUTO
);
227 static inline int pm_runtime_put_sync(struct device
*dev
)
229 return __pm_runtime_idle(dev
, RPM_GET_PUT
);
232 static inline int pm_runtime_put_sync_suspend(struct device
*dev
)
234 return __pm_runtime_suspend(dev
, RPM_GET_PUT
);
237 static inline int pm_runtime_put_sync_autosuspend(struct device
*dev
)
239 return __pm_runtime_suspend(dev
, RPM_GET_PUT
| RPM_AUTO
);
242 static inline int pm_runtime_set_active(struct device
*dev
)
244 return __pm_runtime_set_status(dev
, RPM_ACTIVE
);
247 static inline void pm_runtime_set_suspended(struct device
*dev
)
249 __pm_runtime_set_status(dev
, RPM_SUSPENDED
);
252 static inline void pm_runtime_disable(struct device
*dev
)
254 __pm_runtime_disable(dev
, true);
257 static inline void pm_runtime_use_autosuspend(struct device
*dev
)
259 __pm_runtime_use_autosuspend(dev
, true);
262 static inline void pm_runtime_dont_use_autosuspend(struct device
*dev
)
264 __pm_runtime_use_autosuspend(dev
, false);
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