On 09/08/2015 01:19 PM, Tomi Valkeinen wrote:

quoted

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 <redacted>
---
  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 +++++++++++++++

[...]

quoted

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.

quoted

  /**
   * led_blink_set - set blinking with software fallback
   * @led_cdev: the LED to start blinking

-- 
Best Regards,
Jacek Anaszewski