tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * pm_wakeup.h - Power management wakeup interface
3 *
4 * Copyright (C) 2008 Alan Stern
5 * Copyright (C) 2010 Rafael J. Wysocki, Novell Inc.
6 *
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.
11 *
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.
16 *
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
20 */
21
22#ifndef _LINUX_PM_WAKEUP_H
23#define _LINUX_PM_WAKEUP_H
24
25#ifndef _DEVICE_H_
26# error "please don't include this file directly"
27#endif
28
29#include <linux/types.h>
30
31/**
32 * struct wakeup_source - Representation of wakeup sources
33 *
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.
42 */
43struct wakeup_source {
44 char *name;
45 struct list_head entry;
46 spinlock_t lock;
47 struct timer_list timer;
48 unsigned long timer_expires;
49 ktime_t total_time;
50 ktime_t max_time;
51 ktime_t last_time;
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;
57};
58
59#ifdef CONFIG_PM_SLEEP
60
61/*
62 * Changes to device_may_wakeup take effect on the next pm state change.
63 */
64
65static inline void device_set_wakeup_capable(struct device *dev, bool capable)
66{
67 dev->power.can_wakeup = capable;
68}
69
70static inline bool device_can_wakeup(struct device *dev)
71{
72 return dev->power.can_wakeup;
73}
74
75
76
77static inline bool device_may_wakeup(struct device *dev)
78{
79 return dev->power.can_wakeup && !!dev->power.wakeup;
80}
81
82/* drivers/base/power/wakeup.c */
83extern struct wakeup_source *wakeup_source_create(const char *name);
84extern void wakeup_source_destroy(struct wakeup_source *ws);
85extern void wakeup_source_add(struct wakeup_source *ws);
86extern void wakeup_source_remove(struct wakeup_source *ws);
87extern struct wakeup_source *wakeup_source_register(const char *name);
88extern void wakeup_source_unregister(struct wakeup_source *ws);
89extern int device_wakeup_enable(struct device *dev);
90extern int device_wakeup_disable(struct device *dev);
91extern int device_init_wakeup(struct device *dev, bool val);
92extern int device_set_wakeup_enable(struct device *dev, bool enable);
93extern void __pm_stay_awake(struct wakeup_source *ws);
94extern void pm_stay_awake(struct device *dev);
95extern void __pm_relax(struct wakeup_source *ws);
96extern void pm_relax(struct device *dev);
97extern void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec);
98extern void pm_wakeup_event(struct device *dev, unsigned int msec);
99
100#else /* !CONFIG_PM_SLEEP */
101
102static inline void device_set_wakeup_capable(struct device *dev, bool capable)
103{
104 dev->power.can_wakeup = capable;
105}
106
107static inline bool device_can_wakeup(struct device *dev)
108{
109 return dev->power.can_wakeup;
110}
111
112static inline bool device_may_wakeup(struct device *dev)
113{
114 return false;
115}
116
117static inline struct wakeup_source *wakeup_source_create(const char *name)
118{
119 return NULL;
120}
121
122static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
123
124static inline void wakeup_source_add(struct wakeup_source *ws) {}
125
126static inline void wakeup_source_remove(struct wakeup_source *ws) {}
127
128static inline struct wakeup_source *wakeup_source_register(const char *name)
129{
130 return NULL;
131}
132
133static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
134
135static inline int device_wakeup_enable(struct device *dev)
136{
137 return -EINVAL;
138}
139
140static inline int device_wakeup_disable(struct device *dev)
141{
142 return 0;
143}
144
145static inline int device_init_wakeup(struct device *dev, bool val)
146{
147 dev->power.can_wakeup = val;
148 return val ? -EINVAL : 0;
149}
150
151
152static inline int device_set_wakeup_enable(struct device *dev, bool enable)
153{
154 return -EINVAL;
155}
156
157static inline void __pm_stay_awake(struct wakeup_source *ws) {}
158
159static inline void pm_stay_awake(struct device *dev) {}
160
161static inline void __pm_relax(struct wakeup_source *ws) {}
162
163static inline void pm_relax(struct device *dev) {}
164
165static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) {}
166
167static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {}
168
169#endif /* !CONFIG_PM_SLEEP */
170
171#endif /* _LINUX_PM_WAKEUP_H */