What:		/sys/bus/hid/drivers/wiimote/<dev>/led1
What:		/sys/bus/hid/drivers/wiimote/<dev>/led2
What:		/sys/bus/hid/drivers/wiimote/<dev>/led3
What:		/sys/bus/hid/drivers/wiimote/<dev>/led4
Date:		July 2011
KernelVersion:	3.1
Contact:	David Herrmann <dh.herrmann@googlemail.com>
Description:	Make it possible to set/get current led state. Reading from it
		returns 0 if led is off and 1 if it is on. Writing 0 to it
		disables the led, writing 1 enables it.

What:		/sys/bus/hid/drivers/wiimote/<dev>/extension
Date:		August 2011
KernelVersion:	3.2
Contact:	David Herrmann <dh.herrmann@googlemail.com>
Description:	This file contains the currently connected and initialized
		extensions. It can be one of: none, motionp, nunchuck, classic,
		motionp+nunchuck, motionp+classic
		motionp is the official Nintendo Motion+ extension, nunchuck is
		the official Nintendo Nunchuck extension and classic is the
		Nintendo Classic Controller extension. The motionp extension can
		be combined with the other two.