Documentation/ABI/testing/sysfs-class-led-trigger-usbport

   1 What:           /sys/class/leds/<led>/ports/<port>
   2 Date:           September 2016
   3 KernelVersion:  4.9
   4 Contact:        linux-leds@vger.kernel.org
   5                 linux-usb@vger.kernel.org
   6 Description:
   7                 Every dir entry represents a single USB port that can be
   8                 selected for the USB port trigger. Selecting ports makes trigger
   9                 observing them for any connected devices and lighting on LED if
  10                 there are any.
  11
  12                 Echoing "1" value selects USB port. Echoing "0" unselects it.
  13                 Current state can be also read.