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What:		/sys/module/hid_logitech/drivers/hid:logitech/<dev>/range.
Date:		July 2011
KernelVersion:	3.2
Contact:	Michal Malý <madcatxster@gmail.com>
Description:	Display minimum, maximum and current range of the steering
		wheel. Writing a value within min and max boundaries sets the
		range of the wheel.

What:		/sys/bus/hid/drivers/logitech/<dev>/alternate_modes
Date:		Feb 2015
KernelVersion:	4.1
Contact:	Michal Malý <madcatxster@gmail.com>
Description:	Displays a set of alternate modes supported by a wheel. Each
		mode is listed as follows:
		  Tag: Mode Name
		Currently active mode is marked with an asterisk. List also
		contains an abstract item "native" which always denotes the
		native mode of the wheel.

What:		/sys/bus/hid/drivers/logitech/<dev>/real_id
Date:		Feb 2015
KernelVersion:	4.1
Contact:	Michal Malý <madcatxster@gmail.com>
Description:	Displays the real model of the wheel regardless of any
		alternate mode the wheel might be switched to.
		It is a read-only value.
		This entry is not created for devices that have only one mode.