X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=Documentation%2Fleds-class.txt;h=8fd5ca2ae32dde4d9eb27722942a5d099f4afbc3;hb=fbd8ae106850b6a0215c2776e70a75a1b93cafc2;hp=6399557cdab3d6542a0feea0c0cd2c6b2af5ffad;hpb=15dd859cacf312f606f54502d1f66537a1e5c78c;p=mirror_ubuntu-artful-kernel.git diff --git a/Documentation/leds-class.txt b/Documentation/leds-class.txt index 6399557cdab3..8fd5ca2ae32d 100644 --- a/Documentation/leds-class.txt +++ b/Documentation/leds-class.txt @@ -1,3 +1,4 @@ + LED handling under Linux ======================== @@ -5,10 +6,10 @@ If you're reading this and thinking about keyboard leds, these are handled by the input subsystem and the led class is *not* needed. In its simplest form, the LED class just allows control of LEDs from -userspace. LEDs appear in /sys/class/leds/. The brightness file will -set the brightness of the LED (taking a value 0-255). Most LEDs don't -have hardware brightness support so will just be turned on for non-zero -brightness settings. +userspace. LEDs appear in /sys/class/leds/. The maximum brightness of the +LED is defined in max_brightness file. The brightness file will set the brightness +of the LED (taking a value 0-max_brightness). Most LEDs don't have hardware +brightness support so will just be turned on for non-zero brightness settings. The class also introduces the optional concept of an LED trigger. A trigger is a kernel based source of led events. Triggers can either be simple or