Hi!
If the LED is acquired by a consumer device with devm_led_get(), it is automatically released when the device is detached.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Acked-by: Pavel Machek pavel@ucw.cz
drivers/leds/led-class.c | 49 ++++++++++++++++++++++++++++++++++++++++ include/linux/leds.h | 2 ++ 2 files changed, 51 insertions(+)
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 1d1f1d546dc7..639224392ffa 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -264,6 +264,55 @@ void led_put(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_put);
+static void devm_led_release(struct device *dev, void *res) +{
- struct led_classdev **p = res;
- led_put(*p);
+}
+/**
- devm_of_led_get - Resource-managed request of a LED device
- @dev: LED consumer
- @index: index of the LED to obtain in the consumer
- The device node of the device is parse to find the request LED device.
- The LED device returned from this function is automatically released
- on driver detach.
- @return a pointer to a LED device or ERR_PTR(errno) on failure.
- */
+struct led_classdev *__must_check devm_of_led_get(struct device *dev,
int index)+{
- struct led_classdev *led;
- struct led_classdev **dr;
- if (!dev)
return ERR_PTR(-EINVAL);- /* Consummer not using device tree? */
Typo "consumer". I may fix it before applying the patch.
Best regards, Pavel