From 0173055842cd1d9ed3984e70891c22dbf2f29372 Mon Sep 17 00:00:00 2001
From: Doug Anderson <dianders@chromium.org>
Date: Fri, 22 Aug 2014 19:17:51 +0530
Subject: [PATCH] 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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