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ACPI button: provide lid status functions

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Some drivers need to know when a lid event occurs and get the current
status.  This can be useful for when a platform firmware clobbers some
hardware state at lid time, and a driver needs to restore things when
the lid is opened again.

Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jesse Barnes
2009-09-10 15:28:02 -07:00
committed by Eric Anholt
parent af729a26cc
commit 7e12715ecc
2 changed files with 53 additions and 2 deletions
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10
include/acpi/button.h Normal file
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#ifndef ACPI_BUTTON_H
#define ACPI_BUTTON_H
#include <linux/notifier.h>
extern int acpi_lid_notifier_register(struct notifier_block *nb);
extern int acpi_lid_notifier_unregister(struct notifier_block *nb);
extern int acpi_lid_open(void);
#endif /* ACPI_BUTTON_H */