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authorRafael J. Wysocki <rjw@sisk.pl>2008-01-07 23:04:17 (GMT)
committerLen Brown <len.brown@intel.com>2008-02-01 23:30:56 (GMT)
commitc697eecebc6cfc0b393afea3c4ff1a5041526ad1 (patch)
tree36b0cb4e667792212c2b5d05ac212662555d1682 /arch/arm/mach-at91/pm.c
parent7671b8ae5381a504d4c4ef8dd9c47128c2c3fd7e (diff)
downloadlinux-c697eecebc6cfc0b393afea3c4ff1a5041526ad1.tar.xz
Suspend: Introduce begin() and end() callbacks
On ACPI systems the target state set by acpi_pm_set_target() is reset by acpi_pm_finish(), but that need not be called if the suspend fails.  All platforms that use the .set_target() global suspend callback are affected by analogous issues. For this reason, we need an additional global suspend callback that will reset the target state regardless of whether or not the suspend is successful.  Also, it is reasonable to rename the .set_target() callback, since it will be used for a different purpose on ACPI systems (due to ACPI 1.0x code ordering requirements). Introduce the global suspend callback .end() to be executed at the end of the suspend sequence and rename the .set_target() global suspend callback to .begin(). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/arm/mach-at91/pm.c')
-rw-r--r--arch/arm/mach-at91/pm.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 4b120cc..a67defd 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -52,7 +52,7 @@ static suspend_state_t target_state;
/*
* Called after processes are frozen, but before we shutdown devices.
*/
-static int at91_pm_set_target(suspend_state_t state)
+static int at91_pm_begin(suspend_state_t state)
{
target_state = state;
return 0;
@@ -202,11 +202,20 @@ error:
return 0;
}
+/*
+ * Called right prior to thawing processes.
+ */
+static void at91_pm_end(void)
+{
+ target_state = PM_SUSPEND_ON;
+}
+
static struct platform_suspend_ops at91_pm_ops ={
- .valid = at91_pm_valid_state,
- .set_target = at91_pm_set_target,
- .enter = at91_pm_enter,
+ .valid = at91_pm_valid_state,
+ .begin = at91_pm_begin,
+ .enter = at91_pm_enter,
+ .end = at91_pm_end,
};
static int __init at91_pm_init(void)