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PM: Introduce pm_power_off_prepare

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Introduce the pm_power_off_prepare() callback that can be registered by the
interested platforms in analogy with pm_idle() and pm_power_off(), used for
preparing the system to power off (needed by ACPI).

This allows us to drop acpi_sysclass and device_acpi that are only defined in
order to register the ACPI power off preparation callback, which is needed by
pm_power_off() registered in a much different way.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki
2007-07-19 01:47:40 -07:00
committed by Linus Torvalds
parent d7372cdf69
commit bd804eba1c
3 changed files with 19 additions and 29 deletions
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include/linux/pm.h
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@@ -101,6 +101,7 @@ struct pm_dev
*/
extern void (*pm_idle)(void);
extern void (*pm_power_off)(void);
extern void (*pm_power_off_prepare)(void);
typedef int __bitwise suspend_state_t;