From: Axel Lin <axel.lin@gmail.com>
Date: Sun, 29 Jul 2012 02:54:42 +0000 (+0800)
Subject: gpio: gpio-ml-ioh: Use spinlock for register access protection
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~45^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02a6794d57ce54b96b13db80831f35d66e0caf31;p=pandora-kernel.git

gpio: gpio-ml-ioh: Use spinlock for register access protection

gpio_chip.can_sleep is 0, but current code uses mutex in ioh_gpio_set,
ioh_gpio_get and ioh_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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