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path: root/drivers/leds/led-class.c
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Diffstat (limited to 'drivers/leds/led-class.c')
-rw-r--r--drivers/leds/led-class.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 0292df4101b..b0b5d05fadd 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);