From: Shawn Nematbakhsh <shawnn@chromium.org>
Date: Mon, 15 Apr 2013 20:49:34 +0000 (-0700)
Subject: Input: trackpoint - Optimize trackpoint init to use power-on reset
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~78^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c6a61657da78098472fd0eb71cc01f2387fa1bb;p=pandora-kernel.git

Input: trackpoint - Optimize trackpoint init to use power-on reset

The trackpoint driver sets various parameter default values, all of
which happen to be power-on defaults (Source: IBM TrackPoint Engineering
Specification, Version 4.0. Also confirmed by empirical data).

By sending the power-on reset command to reset all parameters to
power-on state, we can skip the lengthy process of programming all
parameters. In testing, ~2.5 secs of time writing parameters was reduced
to .35 seconds waiting for power-on reset to complete.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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