Revert "ACPI: Fan: Drop force_power_state acpi_device option"
[linux-2.6.git] / drivers / acpi / fan.c
index a5a5532..a6e149d 100644 (file)
@@ -47,6 +47,8 @@ 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, pm_message_t state);
+static int acpi_fan_resume(struct acpi_device *device);
 
 static const struct acpi_device_id fan_device_ids[] = {
        {"PNP0C0B", 0},
@@ -61,6 +63,8 @@ static struct acpi_driver acpi_fan_driver = {
        .ops = {
                .add = acpi_fan_add,
                .remove = acpi_fan_remove,
+               .suspend = acpi_fan_suspend,
+               .resume = acpi_fan_resume,
                },
 };
 
@@ -191,6 +195,10 @@ 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;
@@ -216,6 +224,38 @@ static int acpi_fan_remove(struct acpi_device *device, int type)
        return 0;
 }
 
+static int acpi_fan_suspend(struct acpi_device *device, pm_message_t 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 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;