[PATCH v2 08/12] Documentation: leds: Add description of brightness setting API

From: Jacek Anaszewski
Date: Mon Sep 28 2015 - 09:08:02 EST

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

Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Documentation/leds/leds-class.txt | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/Documentation/leds/leds-class.txt b/Documentation/leds/leds-class.txt
index 62261c0..d406d98 100644
--- a/Documentation/leds/leds-class.txt
+++ b/Documentation/leds/leds-class.txt
@@ -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


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/