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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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2430d12c94
This patch (as1381b) updates a comment describing the kernel's policy toward enabling wakeup by default. It also makes device_set_wakeup_capable() actually do something when CONFIG_PM isn't enabled. It's not clear this is necessary; however if it isn't then device_init_wakeup() and device_can_wakeup() should also be do-nothing routines. Furthermore, I don't expect this change to have any noticeable effect -- but if it does then clearly the old behavior was wrong. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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* pm_wakeup.h - Power management wakeup interface
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*
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* Copyright (C) 2008 Alan Stern
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LINUX_PM_WAKEUP_H
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#define _LINUX_PM_WAKEUP_H
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#ifndef _DEVICE_H_
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# error "please don't include this file directly"
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#endif
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#include <linux/types.h>
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#ifdef CONFIG_PM
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/* Changes to device_may_wakeup take effect on the next pm state change.
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*
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* By default, most devices should leave wakeup disabled. The exceptions
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* are devices that everyone expects to be wakeup sources: keyboards,
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* power buttons, possibly network interfaces, etc.
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*/
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static inline void device_init_wakeup(struct device *dev, bool val)
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{
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dev->power.can_wakeup = dev->power.should_wakeup = val;
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}
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static inline void device_set_wakeup_capable(struct device *dev, bool capable)
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{
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dev->power.can_wakeup = capable;
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}
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static inline bool device_can_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup;
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}
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static inline void device_set_wakeup_enable(struct device *dev, bool enable)
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{
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dev->power.should_wakeup = enable;
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}
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static inline bool device_may_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup && dev->power.should_wakeup;
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}
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#else /* !CONFIG_PM */
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/* For some reason the following routines work even without CONFIG_PM */
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static inline void device_init_wakeup(struct device *dev, bool val)
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{
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dev->power.can_wakeup = val;
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}
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static inline void device_set_wakeup_capable(struct device *dev, bool capable)
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{
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dev->power.can_wakeup = capable;
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}
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static inline bool device_can_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup;
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}
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static inline void device_set_wakeup_enable(struct device *dev, bool enable)
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{
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}
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static inline bool device_may_wakeup(struct device *dev)
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{
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return false;
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}
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#endif /* !CONFIG_PM */
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#endif /* _LINUX_PM_WAKEUP_H */
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