From 26bc4e0cc5426e86398d6780d160f02c0a347087 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@gmail.com>
Date: Mon, 31 Oct 2011 14:24:30 +0800
Subject: [PATCH] mfd: Set tps6586x bits if new value is different from the old
 one

It does not make sense to write new value only when all the bit_mask
bits are zero.
We need to write new value if the bit mask fields of new value is
not equal to old value.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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