From: Peter Chen <peter.chen@freescale.com>
Date: Fri, 10 Jan 2014 05:51:27 +0000 (+0800)
Subject: usb: chipidea: add freescale imx28 special write register method
X-Git-Tag: v3.14-rc1~148^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed8f8318d2ef3e5f9e4ddf79349508c116b68d7f;p=pandora-kernel.git

usb: chipidea: add freescale imx28 special write register method

According to Freescale imx28 Errata, "ENGR119653 USB: ARM to USB
register error issue", All USB register write operations must
use the ARM SWP instruction. So, we implement special hw_write
and hw_test_and_clear for imx28.

Discussion for it at below:
http://marc.info/?l=linux-usb&m=137996395529294&w=2

This patch is needed for stable tree 3.11+.

Cc: stable@vger.kernel.org
Cc: robert.hodaszi@digi.com
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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