From 33d64c4ffab7da36d657a35fe2b494d5c971f615 Mon Sep 17 00:00:00 2001
From: Elen Song <elen.song@atmel.com>
Date: Mon, 22 Jul 2013 16:30:28 +0800
Subject: [PATCH] serial: at91: support run time switch transfer mode

We will switch to pio mode when request of dma or pdc fail.
But soon or later, when the request is success, the transfer mode can switch to them at
next open serial port action.
So in startup stage, we should get original transfer mode.

Signed-off-by: Elen Song <elen.song@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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