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ACPI: create acpi_fan_suspend()/acpi_fan_resume()

Browse Source 
http://bugzilla.kernel.org/show_bug.cgi?id=5000

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Konstantin Karasyov 2006-05-08 00:00:00 -04:00 committed by Len Brown
parent 531881d665
commit 0feabb01d9
3 changed files with 50 additions and 7 deletions
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14
drivers/acpi/bus.c
View File

@ -205,12 +205,14 @@ int acpi_bus_set_power(acpi_handle handle, int state)
* Get device's current power state if it's unknown
* This means device power state isn't initialized or previous setting failed
*/
if (device->power.state == ACPI_STATE_UNKNOWN)
acpi_bus_get_power(device->handle, &device->power.state);
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
state));
return_VALUE(0);
if (!device->flags.force_power_state) {
if (device->power.state == ACPI_STATE_UNKNOWN)
acpi_bus_get_power(device->handle, &device->power.state);
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
state));
return_VALUE(0);
}
}
if (!device->power.states[state].flags.valid) {
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device does not support D%d\n",

40
drivers/acpi/fan.c
View File

@ -48,6 +48,8 @@ MODULE_LICENSE("GPL");
static int acpi_fan_add(struct acpi_device *device);
static int acpi_fan_remove(struct acpi_device *device, int type);
static int acpi_fan_suspend(struct acpi_device *device, int state);
static int acpi_fan_resume(struct acpi_device *device, int state);
static struct acpi_driver acpi_fan_driver = {
.name = ACPI_FAN_DRIVER_NAME,
@ -56,6 +58,8 @@ static struct acpi_driver acpi_fan_driver = {
.ops = {
.add = acpi_fan_add,
.remove = acpi_fan_remove,
.suspend = acpi_fan_suspend,
.resume = acpi_fan_resume,
},
};
@ -206,6 +210,10 @@ static int acpi_fan_add(struct acpi_device *device)
goto end;
}
device->flags.force_power_state = 1;
acpi_bus_set_power(device->handle, state);
device->flags.force_power_state = 0;
result = acpi_fan_add_fs(device);
if (result)
goto end;
@ -239,6 +247,38 @@ static int acpi_fan_remove(struct acpi_device *device, int type)
return_VALUE(0);
}
static int acpi_fan_suspend(struct acpi_device *device, int state)
{
if (!device)
return -EINVAL;
acpi_bus_set_power(device->handle, ACPI_STATE_D0);
return AE_OK;
}
static int acpi_fan_resume(struct acpi_device *device, int state)
{
int result = 0;
int power_state = 0;
if (!device)
return -EINVAL;
result = acpi_bus_get_power(device->handle, &power_state);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error reading fan power state\n"));
return result;
}
device->flags.force_power_state = 1;
acpi_bus_set_power(device->handle, power_state);
device->flags.force_power_state = 0;
return result;
}
static int __init acpi_fan_init(void)
{
int result = 0;

3
include/acpi/acpi_bus.h
View File

@ -169,7 +169,8 @@ struct acpi_device_flags {
u32 power_manageable:1;
u32 performance_manageable:1;
u32 wake_capable:1; /* Wakeup(_PRW) supported? */
u32 reserved:20;
u32 force_power_state:1;
u32 reserved:19;
};
/* File System */