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| author | Pavel Machek <pavel@ucw.cz> | 2016-10-03 10:10:50 +0200 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-11-22 12:07:03 +0100 |
| commit | ed25e9cae1ab8e84556c9413fd5de0a9da8f3657 (patch) | |
| tree | 2312d00eefea114d535fef7ea135bc5354af3e44 /Documentation/ABI/testing/sysfs-class-led | |
| parent | leds: lp3952: Export I2C module alias information for module autoload (diff) | |
| download | linux-ed25e9cae1ab8e84556c9413fd5de0a9da8f3657.tar.xz linux-ed25e9cae1ab8e84556c9413fd5de0a9da8f3657.zip | |
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 <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-led')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-led | 14 |
1 files 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 <rpurdie@rpsys.net> 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/<led>/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/<led>/max_brightness Date: March 2006 KernelVersion: 2.6.17 Contact: Richard Purdie <rpurdie@rpsys.net> 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/<led>/trigger Date: March 2006 @@ -21,7 +29,7 @@ KernelVersion: 2.6.17 Contact: Richard Purdie <rpurdie@rpsys.net> 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/<led> once a given trigger is selected. For |