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

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Date:	Mon, 28 Sep 2015 15:07:17 +0200
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	linux-leds@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, sakari.ailus@...ux.intel.com,
	andrew@...n.ch, rpurdie@...ys.net,
	Jacek Anaszewski <j.anaszewski@...sung.com>
Subject: [PATCH v2 08/12] 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@...sung.com>
---
 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
 ==================================
 
-- 
1.7.9.5

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