From ed25e9cae1ab8e84556c9413fd5de0a9da8f3657 Mon Sep 17 00:00:00 2001 From: Pavel Machek Date: Mon, 3 Oct 2016 10:10:50 +0200 Subject: [PATCH] cleanup LED documentation and make it match reality sysfs-class-led fails to mention some important details. Also fix led vs LED and english. Signed-off-by: Pavel Machek Signed-off-by: Jacek Anaszewski --- Documentation/ABI/testing/sysfs-class-led | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-class-led b/Documentation/ABI/testing/sysfs-class-led index 86ace287d48b..491cdeedc195 100644 --- a/Documentation/ABI/testing/sysfs-class-led +++ b/Documentation/ABI/testing/sysfs-class-led @@ -4,16 +4,24 @@ KernelVersion: 2.6.17 Contact: Richard Purdie Description: Set the brightness of the LED. Most LEDs don't - have hardware brightness support so will just be turned on for + have hardware brightness support, so will just be turned on for non-zero brightness settings. The value is between 0 and /sys/class/leds//max_brightness. + Writing 0 to this file clears active trigger. + + Writing non-zero to this file while trigger is active changes the + top brightness trigger is going to use. + What: /sys/class/leds//max_brightness Date: March 2006 KernelVersion: 2.6.17 Contact: Richard Purdie Description: - Maximum brightness level for this led, default is 255 (LED_FULL). + Maximum brightness level for this LED, default is 255 (LED_FULL). + + If the LED does not support different brightness levels, this + should be 1. What: /sys/class/leds//trigger Date: March 2006 @@ -21,7 +29,7 @@ KernelVersion: 2.6.17 Contact: Richard Purdie Description: Set the trigger for this LED. A trigger is a kernel based source - of led events. + of LED events. You can change triggers in a similar manner to the way an IO scheduler is chosen. Trigger specific parameters can appear in /sys/class/leds/ once a given trigger is selected. For -- 2.20.1