summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/leds/led-class.c6
-rw-r--r--drivers/leds/led-core.c16
-rw-r--r--include/linux/leds.h10
3 files changed, 26 insertions, 6 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 71666a4..7440c58 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -24,12 +24,6 @@
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 brightness_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index 50b579a..aaa8eba 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -127,3 +127,19 @@ void led_set_brightness(struct led_classdev *led_cdev,
__led_set_brightness(led_cdev, brightness);
}
EXPORT_SYMBOL(led_set_brightness);
+
+int led_update_brightness(struct led_classdev *led_cdev)
+{
+ int ret = 0;
+
+ if (led_cdev->brightness_get) {
+ ret = led_cdev->brightness_get(led_cdev);
+ if (ret >= 0) {
+ led_cdev->brightness = ret;
+ return 0;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(led_update_brightness);
diff --git a/include/linux/leds.h b/include/linux/leds.h
index f2e1cbc..a57611d 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -140,6 +140,16 @@ extern void led_blink_set_oneshot(struct led_classdev *led_cdev,
*/
extern void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness);
+/**
+ * led_update_brightness - update LED brightness
+ * @led_cdev: the LED to query
+ *
+ * Get an LED's current brightness and update led_cdev->brightness
+ * member with the obtained value.
+ *
+ * Returns: 0 on success or negative error value on failure
+ */
+extern int led_update_brightness(struct led_classdev *led_cdev);
/*
* LED Triggers
OpenPOWER on IntegriCloud