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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.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 4a938780dfc3..ac05a928f764 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -24,6 +24,12 @@
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)
{
@@ -31,6 +37,7 @@ static ssize_t led_brightness_show(struct device *dev,
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;
@@ -51,6 +58,9 @@ static ssize_t led_brightness_store(struct device *dev,
if (count == size) {
ret = count;
+
+ if (state == LED_OFF)
+ led_trigger_remove(led_cdev);
led_set_brightness(led_cdev, state);
}
@@ -110,6 +120,8 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
list_add_tail(&led_cdev->node, &leds_list);
up_write(&leds_list_lock);
+ led_update_brightness(led_cdev);
+
#ifdef CONFIG_LEDS_TRIGGERS
init_rwsem(&led_cdev->trigger_lock);
@@ -139,12 +151,10 @@ EXPORT_SYMBOL_GPL(led_classdev_register);
/**
* __led_classdev_unregister - unregisters a object of led_properties class.
* @led_cdev: the led device to unregister
- * @suspended: indicates whether system-wide suspend or resume is in progress
*
* Unregisters a previously registered via led_classdev_register object.
*/
-void __led_classdev_unregister(struct led_classdev *led_cdev,
- bool suspended)
+void led_classdev_unregister(struct led_classdev *led_cdev)
{
device_remove_file(led_cdev->dev, &dev_attr_brightness);
#ifdef CONFIG_LEDS_TRIGGERS
@@ -155,16 +165,13 @@ void __led_classdev_unregister(struct led_classdev *led_cdev,
up_write(&led_cdev->trigger_lock);
#endif
- if (suspended)
- device_pm_schedule_removal(led_cdev->dev);
- else
- device_unregister(led_cdev->dev);
+ device_unregister(led_cdev->dev);
down_write(&leds_list_lock);
list_del(&led_cdev->node);
up_write(&leds_list_lock);
}
-EXPORT_SYMBOL_GPL(__led_classdev_unregister);
+EXPORT_SYMBOL_GPL(led_classdev_unregister);
static int __init leds_init(void)
{