From: Chew, Kean Ho <kean.ho.chew@intel.com>
Date: Thu, 6 Mar 2014 13:59:49 +0000 (+0800)
Subject: pinctrl-baytrail: add function mux checking in gpio pin request
X-Git-Tag: v3.15-rc1~150^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=42bd00706ce95d74ad6ebcb8528ee1fbbb992f6a;p=pandora-kernel.git

pinctrl-baytrail: add function mux checking in gpio pin request

The requested gpio pin must has the func_pin_mux field set
to GPIO function by BIOS/FW in advanced. Else, the gpio pin
request would fail. This is to ensure that we do not expose
any gpio pins which shall be used for alternate functions,
for eg: wakeup pin, I/O interfaces for LPSS, etc.

Signed-off-by: Chew, Kean Ho <kean.ho.chew@intel.com>
Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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