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 activated last time.
37 * @event_count: Number of signaled wakeup events.
38 * @active_count: Number of times the wakeup sorce was activated.
39 * @relax_count: Number of times the wakeup sorce was deactivated.
40 * @hit_count: Number of times the wakeup sorce might abort system suspend.
41 * @active: Status of the wakeup source.
43 struct wakeup_source
{
45 struct list_head entry
;
47 struct timer_list timer
;
48 unsigned long timer_expires
;
52 unsigned long event_count
;
53 unsigned long active_count
;
54 unsigned long relax_count
;
55 unsigned long hit_count
;
56 unsigned int active
:1;
59 #ifdef CONFIG_PM_SLEEP
62 * Changes to device_may_wakeup take effect on the next pm state change.
65 static inline bool device_can_wakeup(struct device
*dev
)
67 return dev
->power
.can_wakeup
;
70 static inline bool device_may_wakeup(struct device
*dev
)
72 return dev
->power
.can_wakeup
&& !!dev
->power
.wakeup
;
75 /* drivers/base/power/wakeup.c */
76 extern struct wakeup_source
*wakeup_source_create(const char *name
);
77 extern void wakeup_source_destroy(struct wakeup_source
*ws
);
78 extern void wakeup_source_add(struct wakeup_source
*ws
);
79 extern void wakeup_source_remove(struct wakeup_source
*ws
);
80 extern struct wakeup_source
*wakeup_source_register(const char *name
);
81 extern void wakeup_source_unregister(struct wakeup_source
*ws
);
82 extern int device_wakeup_enable(struct device
*dev
);
83 extern int device_wakeup_disable(struct device
*dev
);
84 extern void device_set_wakeup_capable(struct device
*dev
, bool capable
);
85 extern int device_init_wakeup(struct device
*dev
, bool val
);
86 extern int device_set_wakeup_enable(struct device
*dev
, bool enable
);
87 extern void __pm_stay_awake(struct wakeup_source
*ws
);
88 extern void pm_stay_awake(struct device
*dev
);
89 extern void __pm_relax(struct wakeup_source
*ws
);
90 extern void pm_relax(struct device
*dev
);
91 extern void __pm_wakeup_event(struct wakeup_source
*ws
, unsigned int msec
);
92 extern void pm_wakeup_event(struct device
*dev
, unsigned int msec
);
94 #else /* !CONFIG_PM_SLEEP */
96 static inline void device_set_wakeup_capable(struct device
*dev
, bool capable
)
98 dev
->power
.can_wakeup
= capable
;
101 static inline bool device_can_wakeup(struct device
*dev
)
103 return dev
->power
.can_wakeup
;
106 static inline struct wakeup_source
*wakeup_source_create(const char *name
)
111 static inline void wakeup_source_destroy(struct wakeup_source
*ws
) {}
113 static inline void wakeup_source_add(struct wakeup_source
*ws
) {}
115 static inline void wakeup_source_remove(struct wakeup_source
*ws
) {}
117 static inline struct wakeup_source
*wakeup_source_register(const char *name
)
122 static inline void wakeup_source_unregister(struct wakeup_source
*ws
) {}
124 static inline int device_wakeup_enable(struct device
*dev
)
126 dev
->power
.should_wakeup
= true;
130 static inline int device_wakeup_disable(struct device
*dev
)
132 dev
->power
.should_wakeup
= false;
136 static inline int device_set_wakeup_enable(struct device
*dev
, bool enable
)
138 dev
->power
.should_wakeup
= enable
;
142 static inline int device_init_wakeup(struct device
*dev
, bool val
)
144 device_set_wakeup_capable(dev
, val
);
145 device_set_wakeup_enable(dev
, val
);
149 static inline bool device_may_wakeup(struct device
*dev
)
151 return dev
->power
.can_wakeup
&& dev
->power
.should_wakeup
;
154 static inline void __pm_stay_awake(struct wakeup_source
*ws
) {}
156 static inline void pm_stay_awake(struct device
*dev
) {}
158 static inline void __pm_relax(struct wakeup_source
*ws
) {}
160 static inline void pm_relax(struct device
*dev
) {}
162 static inline void __pm_wakeup_event(struct wakeup_source
*ws
, unsigned int msec
) {}
164 static inline void pm_wakeup_event(struct device
*dev
, unsigned int msec
) {}
166 #endif /* !CONFIG_PM_SLEEP */
168 #endif /* _LINUX_PM_WAKEUP_H */
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