From c0601d285efe063def984f91b04de2d227f89526 Mon Sep 17 00:00:00 2001
From: David Box <david.e.box@linux.intel.com>
Date: Thu, 15 Jan 2015 01:12:16 -0800
Subject: [PATCH] i2c: designware: Add i2c bus locking support

Adds support for acquiring and releasing a hardware bus lock in the i2c
designware core transfer function. This is needed for i2c bus controllers
that are shared with but not controlled by the kernel.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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