From: Todd Broch <tbroch@chromium.org>
Date: Wed, 3 Sep 2014 23:56:12 +0000 (-0700)
Subject: Input: cros_ec_keyb - optimize ghosting algorithm
X-Git-Tag: fixes-for-v3.18-merge-window~26^2^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=017f14e88bf15ca96eb377b3b14fc3c3332e6b9b;p=pandora-kernel.git

Input: cros_ec_keyb - optimize ghosting algorithm

Previous algorithm was a bit conservative and complicating with respect to
identifying key ghosting.  This CL uses the bitops hamming weight function
(hweight8) to count the number of matching rows for colM & colN.  If that
number is > 1 ghosting is present.

Additionally it removes NULL keys and our one virtual keypress KEY_BATTERY
from consideration as these inputs are never physical keypresses.

Signed-off-by: Todd Broch <tbroch@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Tested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

Reading git-diff-tree failed