Documentation/ABI/testing/sysfs-class-led

   1 What:           /sys/class/leds/<led>/brightness
   2 Date:           March 2006
   3 KernelVersion:  2.6.17
   4 Contact:        Richard Purdie <rpurdie@rpsys.net>
   5 Description:
   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.
  10
  11 What:           /sys/class/leds/<led>/max_brightness
  12 Date:           March 2006
  13 KernelVersion:  2.6.17
  14 Contact:        Richard Purdie <rpurdie@rpsys.net>
  15 Description:
  16                 Maximum brightness level for this led, default is 255 (LED_FULL).
  17
  18 What:           /sys/class/leds/<led>/trigger
  19 Date:           March 2006
  20 KernelVersion:  2.6.17
  21 Contact:        Richard Purdie <rpurdie@rpsys.net>
  22 Description:
  23                 Set the trigger for this LED. A trigger is a kernel based source
  24                 of led events.
  25                 You can change triggers in a similar manner to the way an IO
  26                 scheduler is chosen. Trigger specific parameters can appear in
  27                 /sys/class/leds/<led> once a given trigger is selected.
  28
  29 What:           /sys/class/leds/<led>/inverted
  30 Date:           January 2011
  31 KernelVersion:  2.6.38
  32 Contact:        Richard Purdie <rpurdie@rpsys.net>
  33 Description:
  34                 Invert the LED on/off state. This parameter is specific to
  35                 gpio and backlight triggers. In case of the backlight trigger,
  36                 it is useful when driving a LED which is intended to indicate
  37                 a device in a standby like state.