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/* include/linux/earlysuspend.h
*
* Copyright (C) 2007-2008 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _LINUX_EARLYSUSPEND_H
#define _LINUX_EARLYSUSPEND_H
#ifdef CONFIG_HAS_EARLYSUSPEND
#include <linux/list.h>
#endif
/* The early_suspend structure defines suspend and resume hooks to be called
* when the user visible sleep state of the system changes, and a level to
* control the order. They can be used to turn off the screen and input
* devices that are not used for wakeup.
* Suspend handlers are called in low to high level order, resume handlers are
* called in the opposite order. If, when calling register_early_suspend,
* the suspend handlers have already been called without a matching call to the
* resume handlers, the suspend handler will be called directly from
* register_early_suspend. This direct call can violate the normal level order.
*/
enum {
EARLY_SUSPEND_LEVEL_BLANK_SCREEN = 50,
EARLY_SUSPEND_LEVEL_STOP_DRAWING = 100,
EARLY_SUSPEND_LEVEL_DISABLE_FB = 150,
};
struct early_suspend {
#ifdef CONFIG_HAS_EARLYSUSPEND
struct list_head link;
int level;
void (*suspend)(struct early_suspend *h);
void (*resume)(struct early_suspend *h);
#endif
};
#ifdef CONFIG_HAS_EARLYSUSPEND
void register_early_suspend(struct early_suspend *handler);
void unregister_early_suspend(struct early_suspend *handler);
#else
#define register_early_suspend(handler) do { } while (0)
#define unregister_early_suspend(handler) do { } while (0)
#endif
#endif
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