From ad8bb720c23a80233e45ed31d67458f5e5b7ab31 Mon Sep 17 00:00:00 2001
From: Dong Aisheng <dong.aisheng@linaro.org>
Date: Tue, 10 Apr 2012 12:41:34 +0800
Subject: [PATCH] pinctrl: add some error checking for user interfaces

This patch can avoid kernel oops in case the mux or config
function is not supported by driver.

Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Reading git-format-patch failed