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What:		/sys/class/leds/<led>/gt683r/mode
Date:		Jun 2014
KernelVersion:	3.17
Contact:	Janne Kanniainen <janne.kanniainen@gmail.com>
Description:
		Set the mode of LEDs. You should notice that changing the mode
		of one LED will update the mode of its two sibling devices as
		well. Possible values are:

		==  =========
		0   normal
		1   audio
		2   breathing
		==  =========

		Normal: LEDs are fully on when enabled
		Audio:  LEDs brightness depends on sound level
		Breathing: LEDs brightness varies at human breathing rate