From: Janusz Uzycki <j.uzycki@elproma.com.pl>
Date: Wed, 19 Nov 2014 08:55:22 +0000 (+0100)
Subject: gpio: mxs: implement get_direction callback
X-Git-Tag: omap-for-v3.19/fixes-rc1~89^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8aaa1bf068f76c84111671a7c13ad7b06b21997;p=pandora-kernel.git

gpio: mxs: implement get_direction callback

gpiolib's gpiod_get_direction() function returns the EINVAL error
if .get_direction callback is not defined.
The patch implements the callback for mxs chip which is useful
for debugging.

Inspired by arch/arm/mach-at91/gpio.c

On the moment the patch is required to get the patch
"serial: mxs-auart: enable PPS support" working.
It is planned to introduce new mctrl_gpio helpers to avoid
gpiod_get_direction() function.

Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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