static struct class *leds_class;
+static void led_update_brightness(struct led_classdev *led_cdev)
+{
+ if (led_cdev->brightness_get)
+ led_cdev->brightness = led_cdev->brightness_get(led_cdev);
+}
+
static ssize_t led_brightness_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t ret = 0;
/* no lock needed for this */
+ led_update_brightness(led_cdev);
sprintf(buf, "%u\n", led_cdev->brightness);
ret = strlen(buf) + 1;
if (count == size) {
ret = count;
+
+ if (state == LED_OFF)
+ led_trigger_remove(led_cdev);
led_set_brightness(led_cdev, state);
}
goto err_out;
/* add to the list of leds */
- write_lock(&leds_list_lock);
+ down_write(&leds_list_lock);
list_add_tail(&led_cdev->node, &leds_list);
- write_unlock(&leds_list_lock);
+ up_write(&leds_list_lock);
+
+ led_update_brightness(led_cdev);
#ifdef CONFIG_LEDS_TRIGGERS
init_rwsem(&led_cdev->trigger_lock);
EXPORT_SYMBOL_GPL(led_classdev_register);
/**
- * led_classdev_unregister - unregisters a object of led_properties class.
+ * __led_classdev_unregister - unregisters a object of led_properties class.
* @led_cdev: the led device to unregister
*
* Unregisters a previously registered via led_classdev_register object.
device_unregister(led_cdev->dev);
- write_lock(&leds_list_lock);
+ down_write(&leds_list_lock);
list_del(&led_cdev->node);
- write_unlock(&leds_list_lock);
+ up_write(&leds_list_lock);
}
EXPORT_SYMBOL_GPL(led_classdev_unregister);