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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 | */ | |
33 | static inline void device_init_wakeup(struct device *dev, int val) | |
34 | { | |
35 | dev->power.can_wakeup = dev->power.should_wakeup = !!val; | |
36 | } | |
37 | ||
38 | static inline int device_can_wakeup(struct device *dev) | |
39 | { | |
40 | return dev->power.can_wakeup; | |
41 | } | |
42 | ||
43 | static inline void device_set_wakeup_enable(struct device *dev, int val) | |
44 | { | |
45 | dev->power.should_wakeup = !!val; | |
46 | } | |
47 | ||
48 | static 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 | */ | |
58 | extern int (*platform_enable_wakeup)(struct device *dev, int is_on); | |
59 | ||
60 | static 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 */ | |
70 | static inline void device_init_wakeup(struct device *dev, int val) | |
71 | { | |
72 | dev->power.can_wakeup = !!val; | |
73 | } | |
74 | ||
75 | static 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 | ||
83 | static 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 */ |