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ACPI / Wakeup: Simplify enabling of wakeup devices 

To simplify the enabling of wakeup devices during system suspend and
hibernation, merge acpi_enable_wakeup_device_prep() with
acpi_disable_wakeup_device() and remove unnecessary (and no longer
valid) comments from the latter.  Rename acpi_enable_wakeup_device()
to acpi_enable_wakeup_devices() and acpi_disable_wakeup_device()
to acpi_disable_wakeup_devices(), because these functions usually
operate on multiple device objects.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2010-07-06 22:09:38 -04:00 коммит произвёл Len Brown
Родитель 25bed55753
Коммит 78f5f02316
3 изменённых файлов: 14 добавлений и 44 удалений
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5
drivers/acpi/sleep.c
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@ -73,8 +73,7 @@ static int acpi_sleep_prepare(u32 acpi_state)
#endif
printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
acpi_state);
acpi_enable_wakeup_device_prep(acpi_state);
acpi_enable_wakeup_device(acpi_state);
acpi_enable_wakeup_devices(acpi_state);
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
@ -153,7 +152,7 @@ static void acpi_pm_finish(void)
printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
acpi_state);
acpi_disable_wakeup_device(acpi_state);
acpi_disable_wakeup_devices(acpi_state);
acpi_leave_sleep_state(acpi_state);
/* reset firmware waking vector */

5
drivers/acpi/sleep.h
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@ -2,9 +2,8 @@
extern u8 sleep_states[];
extern int acpi_suspend(u32 state);
extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
extern void acpi_enable_wakeup_device(u8 sleep_state);
extern void acpi_disable_wakeup_device(u8 sleep_state);
extern void acpi_enable_wakeup_devices(u8 sleep_state);
extern void acpi_disable_wakeup_devices(u8 sleep_state);
extern struct list_head acpi_wakeup_device_list;
extern struct mutex acpi_device_lock;

48
drivers/acpi/wakeup.c
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@ -21,45 +21,17 @@
ACPI_MODULE_NAME("wakeup_devices")
/**
* acpi_enable_wakeup_device_prep - Prepare wake-up devices.
* acpi_enable_wakeup_devices - Enable wake-up device GPEs.
* @sleep_state: ACPI system sleep state.
*
* Enable all wake-up devices' power, unless the requested system sleep state is
* too deep.
* Enable wakeup device power of devices with the state.enable flag set and set
* the wakeup enable mask bits in the GPE registers that correspond to wakeup
* devices.
*/
void acpi_enable_wakeup_device_prep(u8 sleep_state)
void acpi_enable_wakeup_devices(u8 sleep_state)
{
struct list_head *node, *next;
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
struct acpi_device *dev = container_of(node,
struct acpi_device,
wakeup_list);
if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
|| (sleep_state > (u32) dev->wakeup.sleep_state))
continue;
acpi_enable_wakeup_device_power(dev, sleep_state);
}
}
/**
* acpi_enable_wakeup_device - Enable wake-up device GPEs.
* @sleep_state: ACPI system sleep state.
*
* Enable all wake-up devices' GPEs, with the assumption that
* acpi_disable_all_gpes() was executed before, so we don't need to disable any
* GPEs here.
*/
void acpi_enable_wakeup_device(u8 sleep_state)
{
struct list_head *node, *next;
/*
* Caution: this routine must be invoked when interrupt is disabled
* Refer ACPI2.0: P212
*/
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
struct acpi_device *dev =
container_of(node, struct acpi_device, wakeup_list);
@ -68,6 +40,9 @@ void acpi_enable_wakeup_device(u8 sleep_state)
|| sleep_state > (u32) dev->wakeup.sleep_state)
continue;
if (dev->wakeup.state.enabled)
acpi_enable_wakeup_device_power(dev, sleep_state);
/* The wake-up power should have been enabled already. */
acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE);
@ -75,13 +50,10 @@ void acpi_enable_wakeup_device(u8 sleep_state)
}
/**
* acpi_disable_wakeup_device - Disable devices' wakeup capability.
* acpi_disable_wakeup_devices - Disable devices' wakeup capability.
* @sleep_state: ACPI system sleep state.
*
* This function only affects devices with wakeup.state.enabled set, which means
* that it reverses the changes made by acpi_enable_wakeup_device_prep().
*/
void acpi_disable_wakeup_device(u8 sleep_state)
void acpi_disable_wakeup_devices(u8 sleep_state)
{
struct list_head *node, *next;