Documentation: leds: Add description of brightness setting API

This patch adds description of the LED subsystem API for
setting an LED brightness.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
This commit is contained in:
Jacek Anaszewski 2015-10-07 11:10:44 +02:00
parent 13ae79bbe4
commit 648da8ff48

View file

@ -52,6 +52,19 @@ above leaves scope for further attributes should they be needed. If sections
of the name don't apply, just leave that section blank.
Brightness setting API
======================
LED subsystem core exposes following API for setting brightness:
- led_set_brightness : it is guaranteed not to sleep, passing LED_OFF stops
blinking,
- led_set_brightness_sync : for use cases when immediate effect is desired -
it can block the caller for the time required for accessing
device registers and can sleep, passing LED_OFF stops hardware
blinking, returns -EBUSY if software blink fallback is enabled.
Hardware accelerated blink of LEDs
==================================