gpio: gpio-ml-ioh: Use spinlock for register access protection
authorAxel Lin <axel.lin@gmail.com>
Sun, 29 Jul 2012 02:54:42 +0000 (10:54 +0800)
committerLinus Walleij <linus.walleij@linaro.org>
Fri, 17 Aug 2012 05:35:42 +0000 (07:35 +0200)
commit02a6794d57ce54b96b13db80831f35d66e0caf31
treea395f2a69060931c3d6e3c4c43a38f5c45baa431
parentf9c4a31f61501d25f0a45faae6a5cd701ad5694a
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>
drivers/gpio/gpio-ml-ioh.c