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authorRafael J. Wysocki <rjw@sisk.pl>2007-10-18 03:04:42 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-18 14:37:18 -0700
commit74f270af0c1ed5b9d4413784256959dcfe3593ce (patch)
tree5b74248167be086b0050a84f9ebe072bbb43fdb3 /drivers/acpi
parentf242d9196fd1ef4e6bf0e50d2e7f32866fb145c2 (diff)
PM: Rework struct hibernation_ops
During hibernation we also need to tell the ACPI core that we're going to put the system into the S4 sleep state. For this reason, an additional method in 'struct hibernation_ops' is needed, playing the role of set_target() in 'struct platform_suspend_operations'. Moreover, the role of the .prepare() method is now different, so it's better to introduce another method, that in general may be different from .prepare(), that will be used to prepare the platform for creating the hibernation image (.prepare() is used anyway to notify the platform that we're going to enter the low power state after the image has been saved). 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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/sleep/main.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index c58dd0bb550..f20b0ab9ef5 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -230,6 +230,12 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATION
+static int acpi_hibernation_start(void)
+{
+ acpi_target_sleep_state = ACPI_STATE_S4;
+ return 0;
+}
+
static int acpi_hibernation_prepare(void)
{
return acpi_sleep_prepare(ACPI_STATE_S4);
@@ -258,6 +264,8 @@ static void acpi_hibernation_finish(void)
/* reset firmware waking vector */
acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+
+ acpi_target_sleep_state = ACPI_STATE_S0;
}
static int acpi_hibernation_pre_restore(void)
@@ -275,9 +283,11 @@ static void acpi_hibernation_restore_cleanup(void)
}
static struct hibernation_ops acpi_hibernation_ops = {
+ .start = acpi_hibernation_start,
+ .pre_snapshot = acpi_hibernation_prepare,
+ .finish = acpi_hibernation_finish,
.prepare = acpi_hibernation_prepare,
.enter = acpi_hibernation_enter,
- .finish = acpi_hibernation_finish,
.pre_restore = acpi_hibernation_pre_restore,
.restore_cleanup = acpi_hibernation_restore_cleanup,
};