From: Jason Gerecke <killertofu@gmail.com>
Date: Thu, 4 Oct 2012 00:19:11 +0000 (-0700)
Subject: Input: wacom - report correct touch contact size for I5/Bamboo
X-Git-Tag: v3.7-rc1~23^2^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e90495498cc6f1aa15e7667a695908860938b3e;p=pandora-kernel.git

Input: wacom - report correct touch contact size for I5/Bamboo

This changes how the touch packets for Intuos5 and 3rd-gen Bamboo
are interpreted, so that proper values for the MAJOR and MINOR
axes are reported. Instead of using the amplitude field (data[6]),
we use the size field (data[5]) and do some calculation to
transform it from a scaled-down area into axis lengths.

Note that even though we assume a circular contact, both MAJOR and
MINOR are reported since the resolution of the X and Y axes differ.

Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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