1 What: /sys/class/leds/<led>/brightness
4 Contact: Richard Purdie <rpurdie@rpsys.net>
6 Set the brightness of the LED. Most LEDs don't
7 have hardware brightness support, so will just be turned on for
8 non-zero brightness settings. The value is between 0 and
9 /sys/class/leds/<led>/max_brightness.
11 Writing 0 to this file clears active trigger.
13 Writing non-zero to this file while trigger is active changes the
14 top brightness trigger is going to use.
16 What: /sys/class/leds/<led>/max_brightness
19 Contact: Richard Purdie <rpurdie@rpsys.net>
21 Maximum brightness level for this LED, default is 255 (LED_FULL).
23 If the LED does not support different brightness levels, this
26 What: /sys/class/leds/<led>/trigger
29 Contact: Richard Purdie <rpurdie@rpsys.net>
31 Set the trigger for this LED. A trigger is a kernel based source
33 You can change triggers in a similar manner to the way an IO
34 scheduler is chosen. Trigger specific parameters can appear in
35 /sys/class/leds/<led> once a given trigger is selected. For
36 their documentation see sysfs-class-led-trigger-*.
38 What: /sys/class/leds/<led>/inverted
41 Contact: Richard Purdie <rpurdie@rpsys.net>
43 Invert the LED on/off state. This parameter is specific to
44 gpio and backlight triggers. In case of the backlight trigger,
45 it is useful when driving a LED which is intended to indicate
46 a device in a standby like state.