2 * pm_wakeup.h - Power management wakeup interface
4 * Copyright (C) 2008 Alan Stern
5 * Copyright (C) 2010 Rafael J. Wysocki, Novell Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #ifndef _LINUX_PM_WAKEUP_H
23 #define _LINUX_PM_WAKEUP_H
26 # error "please don't include this file directly"
29 #include <linux/types.h>
32 * struct wakeup_source - Representation of wakeup sources
34 * @total_time: Total time this wakeup source has been active.
35 * @max_time: Maximum time this wakeup source has been continuously active.
36 * @last_time: Monotonic clock when the wakeup source's was touched last time.
37 * @prevent_sleep_time: Total time this source has been preventing autosleep.
38 * @event_count: Number of signaled wakeup events.
39 * @active_count: Number of times the wakeup source was activated.
40 * @relax_count: Number of times the wakeup source was deactivated.
41 * @expire_count: Number of times the wakeup source's timeout has expired.
42 * @wakeup_count: Number of times the wakeup source might abort suspend.
43 * @active: Status of the wakeup source.
44 * @has_timeout: The wakeup source has been activated with a timeout.
46 struct wakeup_source {
48 struct list_head entry;
50 struct timer_list timer;
51 unsigned long timer_expires;
55 ktime_t start_prevent_time;
56 ktime_t prevent_sleep_time;
57 unsigned long event_count;
58 unsigned long active_count;
59 unsigned long relax_count;
60 unsigned long expire_count;
61 unsigned long wakeup_count;
63 bool autosleep_enabled:1;
66 #ifdef CONFIG_PM_SLEEP
69 * Changes to device_may_wakeup take effect on the next pm state change.
72 static inline bool device_can_wakeup(struct device *dev)
74 return dev->power.can_wakeup;
77 static inline bool device_may_wakeup(struct device *dev)
79 return dev->power.can_wakeup && !!dev->power.wakeup;
82 /* drivers/base/power/wakeup.c */
83 extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name);
84 extern struct wakeup_source *wakeup_source_create(const char *name);
85 extern void wakeup_source_drop(struct wakeup_source *ws);
86 extern void wakeup_source_destroy(struct wakeup_source *ws);
87 extern void wakeup_source_add(struct wakeup_source *ws);
88 extern void wakeup_source_remove(struct wakeup_source *ws);
89 extern struct wakeup_source *wakeup_source_register(const char *name);
90 extern void wakeup_source_unregister(struct wakeup_source *ws);
91 extern int device_wakeup_enable(struct device *dev);
92 extern int device_wakeup_disable(struct device *dev);
93 extern void device_set_wakeup_capable(struct device *dev, bool capable);
94 extern int device_init_wakeup(struct device *dev, bool val);
95 extern int device_set_wakeup_enable(struct device *dev, bool enable);
96 extern void __pm_stay_awake(struct wakeup_source *ws);
97 extern void pm_stay_awake(struct device *dev);
98 extern void __pm_relax(struct wakeup_source *ws);
99 extern void pm_relax(struct device *dev);
100 extern void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec);
101 extern void pm_wakeup_event(struct device *dev, unsigned int msec);
103 #else /* !CONFIG_PM_SLEEP */
105 static inline void device_set_wakeup_capable(struct device *dev, bool capable)
107 dev->power.can_wakeup = capable;
110 static inline bool device_can_wakeup(struct device *dev)
112 return dev->power.can_wakeup;
115 static inline void wakeup_source_prepare(struct wakeup_source *ws,
118 static inline struct wakeup_source *wakeup_source_create(const char *name)
123 static inline void wakeup_source_drop(struct wakeup_source *ws) {}
125 static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
127 static inline void wakeup_source_add(struct wakeup_source *ws) {}
129 static inline void wakeup_source_remove(struct wakeup_source *ws) {}
131 static inline struct wakeup_source *wakeup_source_register(const char *name)
136 static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
138 static inline int device_wakeup_enable(struct device *dev)
140 dev->power.should_wakeup = true;
144 static inline int device_wakeup_disable(struct device *dev)
146 dev->power.should_wakeup = false;
150 static inline int device_set_wakeup_enable(struct device *dev, bool enable)
152 dev->power.should_wakeup = enable;
156 static inline int device_init_wakeup(struct device *dev, bool val)
158 device_set_wakeup_capable(dev, val);
159 device_set_wakeup_enable(dev, val);
163 static inline bool device_may_wakeup(struct device *dev)
165 return dev->power.can_wakeup && dev->power.should_wakeup;
168 static inline void __pm_stay_awake(struct wakeup_source *ws) {}
170 static inline void pm_stay_awake(struct device *dev) {}
172 static inline void __pm_relax(struct wakeup_source *ws) {}
174 static inline void pm_relax(struct device *dev) {}
176 static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) {}
178 static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {}
180 #endif /* !CONFIG_PM_SLEEP */
182 static inline void wakeup_source_init(struct wakeup_source *ws,
185 wakeup_source_prepare(ws, name);
186 wakeup_source_add(ws);
189 static inline void wakeup_source_trash(struct wakeup_source *ws)
191 wakeup_source_remove(ws);
192 wakeup_source_drop(ws);
195 #endif /* _LINUX_PM_WAKEUP_H */