From: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Date: Thu, 29 Jan 2015 15:00:06 +0000 (+0100)
Subject: mmc: pwrseq_simple: Add optional reference clock support
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~125^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c13045b1e939a9ecffab4a8f8d514e8a2a0bd2c9;p=pandora-kernel.git

mmc: pwrseq_simple: Add optional reference clock support

Some WLAN chips attached to a SDIO interface, need a reference clock.

Since this is very common, extend the prseq_simple driver to support
an optional clock that is enabled prior the card power up procedure.

Note: the external clock is optional. Thus an error is not returned
if the clock is not found.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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