From bdb93c03c5503aba9a6d98d49e543d879d85d0c4 Mon Sep 17 00:00:00 2001
From: Markus Mayer <markus.mayer@linaro.org>
Date: Tue, 21 Jan 2014 16:10:41 -0800
Subject: [PATCH] gpio: bcm281xx: Centralize register locking

Rather than unlock/re-lock for every write access, unlock a GPIO when
it is requested and re-lock it when it is freed. As a result, the GPIO
helper functions no longer have to deal with unlocking and re-locking
the register.

In addition, only unlock a specific GPIO rather than unlocking the
entire GPIO bank as before.

Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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