From ae9ca493ee2adaebc2bccd60fb6ccf93a214262c Mon Sep 17 00:00:00 2001
From: Wei Chen <Wei.Chen@csr.com>
Date: Thu, 4 Dec 2014 20:12:09 +0800
Subject: [PATCH] gpio: sx150x: add support for sx1506 gpio expander device

semtech has two series of sx150x gpio expanders: sx150x-456 and
sx150x-789.

The current gpio-150x driver in linux only support sx1508 and
sx1509.

We added sx1506 support code into this driver.

Signed-off-by: Wei Chen <Wei.Chen@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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