From: Doug Anderson <dianders@chromium.org>
Date: Fri, 22 Aug 2014 13:47:51 +0000 (+0530)
Subject: mmc: dw_mmc: Support voltage changes
X-Git-Tag: fixes-against-v3.18-rc2~127^2~65
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0173055842cd;p=pandora-kernel.git

mmc: dw_mmc: Support voltage changes

For UHS cards we need the ability to switch voltages from 3.3V to
1.8V.  Add support to the dw_mmc driver to handle this.  Note that
dw_mmc needs a little bit of extra code since the interface needs a
special bit programmed to the CMD register while CMD11 is progressing.
This means adding a few extra states to the state machine to track.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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