Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * pm_wakeup.h - Power management wakeup interface
3 *
4 * Copyright (C) 2008 Alan Stern
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#ifndef _LINUX_PM_WAKEUP_H
22#define _LINUX_PM_WAKEUP_H
23
24#ifndef _DEVICE_H_
25# error "please don't include this file directly"
26#endif
27
28#ifdef CONFIG_PM
29
30/* changes to device_may_wakeup take effect on the next pm state change.
31 * by default, devices should wakeup if they can.
32 */
33static inline void device_init_wakeup(struct device *dev, int val)
34{
35 dev->power.can_wakeup = dev->power.should_wakeup = !!val;
36}
37
38static inline int device_can_wakeup(struct device *dev)
39{
40 return dev->power.can_wakeup;
41}
42
43static inline void device_set_wakeup_enable(struct device *dev, int val)
44{
45 dev->power.should_wakeup = !!val;
46}
47
48static inline int device_may_wakeup(struct device *dev)
49{
50 return dev->power.can_wakeup & dev->power.should_wakeup;
51}
52
53/*
54 * Platform hook to activate device wakeup capability, if that's not already
55 * handled by enable_irq_wake() etc.
56 * Returns zero on success, else negative errno
57 */
58extern int (*platform_enable_wakeup)(struct device *dev, int is_on);
59
60static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
61{
62 if (platform_enable_wakeup)
63 return (*platform_enable_wakeup)(dev, is_on);
64 return 0;
65}
66
67#else /* !CONFIG_PM */
68
69/* For some reason the next two routines work even without CONFIG_PM */
70static inline void device_init_wakeup(struct device *dev, int val)
71{
72 dev->power.can_wakeup = !!val;
73}
74
75static inline int device_can_wakeup(struct device *dev)
76{
77 return dev->power.can_wakeup;
78}
79
80#define device_set_wakeup_enable(dev, val) do {} while (0)
81#define device_may_wakeup(dev) 0
82
83static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
84{
85 return 0;
86}
87
88#endif /* !CONFIG_PM */
89
90#endif /* _LINUX_PM_WAKEUP_H */