From 04c50ccf0dab02923ef888a4839bfbd00de03181 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@linaro.org>
Date: Thu, 10 Oct 2013 22:38:29 +0100
Subject: [PATCH] regmap: Only send a single buffer for async I/O if writing
 one register

Extend the interface for async I/O by allowing the value buffer to be
omitted and sending the value as part of the register buffer, minimising
the number of separate hardware operations required.

Signed-off-by: Mark Brown <broonie@linaro.org>
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