1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 0292df4101ba..b0b5d05fadd6 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -54,6 +54,9 @@ static ssize_t led_brightness_store(struct class_device *dev,
 
 static CLASS_DEVICE_ATTR(brightness, 0644, led_brightness_show,
                         led_brightness_store);
+#ifdef CONFIG_LEDS_TRIGGERS
+static CLASS_DEVICE_ATTR(trigger, 0644, led_trigger_show, led_trigger_store);
+#endif
 
 /**
  * led_classdev_suspend - suspend an led_classdev.
@@ -100,6 +103,15 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
         list_add_tail(&led_cdev->node, &leds_list);
         write_unlock(&leds_list_lock);
 
+#ifdef CONFIG_LEDS_TRIGGERS
+        rwlock_init(&led_cdev->trigger_lock);
+
+        led_trigger_set_default(led_cdev);
+
+        class_device_create_file(led_cdev->class_dev,
+                                &class_device_attr_trigger);
+#endif
+
         printk(KERN_INFO "Registered led device: %s\n",
                         led_cdev->class_dev->class_id);
 
@@ -117,6 +129,14 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
 {
         class_device_remove_file(led_cdev->class_dev,
                                 &class_device_attr_brightness);
+#ifdef CONFIG_LEDS_TRIGGERS
+        class_device_remove_file(led_cdev->class_dev,
+                                &class_device_attr_trigger);
+        write_lock(&led_cdev->trigger_lock);
+        if (led_cdev->trigger)
+                led_trigger_set(led_cdev, NULL);
+        write_unlock(&led_cdev->trigger_lock);
+#endif
 
         class_device_unregister(led_cdev->class_dev);