From: Axel Lin <axel.lin@gmail.com>
Date: Sun, 29 Jul 2012 02:55:54 +0000 (+0800)
Subject: gpio: gpio-pch: Use spinlock for register access protection
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~45^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7cb6580c0b2690e5c6ac1acd9375fa55d72af289;p=pandora-kernel.git

gpio: gpio-pch: Use spinlock for register access protection

gpio_chip.can_sleep is 0, but current code uses mutex in pch_gpio_set
pch_gpio_get and pch_gpio_direction_input functions.
Thus those functions are not callable from interrupt context.
This patch converts mutex into spinlock.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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