On 09/08/2015 01:19 PM, Tomi Valkeinen wrote:
This patch adds basic support for a kernel driver to get a LED device. This will be used by the led-backlight driver. Only OF version is implemented for now, and the behavior is similar to PWM's of_pwm_get() and pwm_put(). Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx> --- drivers/leds/Makefile | 6 +++- drivers/leds/led-class.c | 13 +++++++- drivers/leds/led-of.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++ drivers/leds/leds.h | 1 + include/linux/leds-of.h | 26 +++++++++++++++
[...]
diff --git a/include/linux/leds-of.h b/include/linux/leds-of.h new file mode 100644 index 000000000000..7e8e64bd9811 --- /dev/null +++ b/include/linux/leds-of.h @@ -0,0 +1,26 @@ +/* + * OF support for leds + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef __LINUX_LEDS_OF_H_INCLUDED +#define __LINUX_LEDS_OF_H_INCLUDED + +#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_LEDS_CLASS) + +extern struct led_classdev *of_led_get(struct device_node *np); + +#else + +static inline struct led_classdev *of_led_get(struct device_node *np) +{ + return -ENODEV; +} + +#endif + +#endif /* __LINUX_LEDS_OF_H_INCLUDED */ diff --git a/include/linux/leds.h b/include/linux/leds.h index b122eeafb5dc..0fce71a06d68 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -113,6 +113,8 @@ extern void devm_led_classdev_unregister(struct device *parent, extern void led_classdev_suspend(struct led_classdev *led_cdev); extern void led_classdev_resume(struct led_classdev *led_cdev); +extern void led_put(struct led_classdev *led_cdev); +
This also needs no-op version.
/** * led_blink_set - set blinking with software fallback * @led_cdev: the LED to start blinking
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