LXR linux/include/linux/pm

   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 void device_set_wakeup_capable(struct device *dev, int val)
  39{
  40        dev->power.can_wakeup = !!val;
  41}
  42
  43static inline int device_can_wakeup(struct device *dev)
  44{
  45        return dev->power.can_wakeup;
  46}
  47
  48static inline void device_set_wakeup_enable(struct device *dev, int val)
  49{
  50        dev->power.should_wakeup = !!val;
  51}
  52
  53static inline int device_may_wakeup(struct device *dev)
  54{
  55        return dev->power.can_wakeup && dev->power.should_wakeup;
  56}
  57
  58#else /* !CONFIG_PM */
  59
  60/* For some reason the next two routines work even without CONFIG_PM */
  61static inline void device_init_wakeup(struct device *dev, int val)
  62{
  63        dev->power.can_wakeup = !!val;
  64}
  65
  66static inline void device_set_wakeup_capable(struct device *dev, int val) { }
  67
  68static inline int device_can_wakeup(struct device *dev)
  69{
  70        return dev->power.can_wakeup;
  71}
  72
  73#define device_set_wakeup_enable(dev, val)      do {} while (0)
  74#define device_may_wakeup(dev)                  0
  75
  76#endif /* !CONFIG_PM */
  77
  78#endif /* _LINUX_PM_WAKEUP_H */
  79