1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 4addf8ad50ae..af7f4663deaa 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -468,6 +468,31 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
                 *d_min_p = d_min;
         return d_max;
 }
+
+/**
+ *      acpi_pm_device_sleep_wake - enable or disable the system wake-up
+ *                                  capability of given device
+ *      @dev: device to handle
+ *      @enable: 'true' - enable, 'false' - disable the wake-up capability
+ */
+int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
+{
+        acpi_handle handle;
+        struct acpi_device *adev;
+
+        if (!device_may_wakeup(dev))
+                return -EINVAL;
+
+        handle = DEVICE_ACPI_HANDLE(dev);
+        if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
+                printk(KERN_DEBUG "ACPI handle has no context!\n");
+                return -ENODEV;
+        }
+
+        return enable ?
+                acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
+                acpi_disable_wakeup_device_power(adev);
+}
 #endif
 
 static void acpi_power_off_prepare(void)