include/linux/pm_wakeup.h

   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 #include <linux/types.h>
  29
  30 #ifdef CONFIG_PM
  31
  32 /* Changes to device_may_wakeup take effect on the next pm state change.
  33  *
  34  * By default, most devices should leave wakeup disabled.  The exceptions
  35  * are devices that everyone expects to be wakeup sources: keyboards,
  36  * power buttons, possibly network interfaces, etc.
  37  */
  38 static inline void device_init_wakeup(struct device *dev, bool val)
  39 {
  40         dev->power.can_wakeup = dev->power.should_wakeup = val;
  41 }
  42
  43 static inline void device_set_wakeup_capable(struct device *dev, bool capable)
  44 {
  45         dev->power.can_wakeup = capable;
  46 }
  47
  48 static inline bool device_can_wakeup(struct device *dev)
  49 {
  50         return dev->power.can_wakeup;
  51 }
  52
  53 static inline void device_set_wakeup_enable(struct device *dev, bool enable)
  54 {
  55         dev->power.should_wakeup = enable;
  56 }
  57
  58 static inline bool device_may_wakeup(struct device *dev)
  59 {
  60         return dev->power.can_wakeup && dev->power.should_wakeup;
  61 }
  62
  63 #else /* !CONFIG_PM */
  64
  65 /* For some reason the following routines work even without CONFIG_PM */
  66 static inline void device_init_wakeup(struct device *dev, bool val)
  67 {
  68         dev->power.can_wakeup = val;
  69 }
  70
  71 static inline void device_set_wakeup_capable(struct device *dev, bool capable)
  72 {
  73         dev->power.can_wakeup = capable;
  74 }
  75
  76 static inline bool device_can_wakeup(struct device *dev)
  77 {
  78         return dev->power.can_wakeup;
  79 }
  80
  81 static inline void device_set_wakeup_enable(struct device *dev, bool enable)
  82 {
  83 }
  84
  85 static inline bool device_may_wakeup(struct device *dev)
  86 {
  87         return false;
  88 }
  89
  90 #endif /* !CONFIG_PM */
  91
  92 #endif /* _LINUX_PM_WAKEUP_H */