Input: trackpoint: document sysfs interface

Descriptions have been collected from git commit logs, code commits and
the TrackPoint System Version 4.0 Engineering Specification.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Aishwarya Pant 2018-03-02 23:00:19 +05:30 • committed by Jonathan Corbet
commit aebb47d4e7