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