From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.xen@gmail.com>
Subject: Re: [PATCH RFC 4/8] ns16550: support DesignWare 8250
Date: Tue, 10 Sep 2013 07:36:50 -0700
Message-ID: <CE547C92.5D47B%keir.xen@gmail.com>
References: <1378822705-19310-4-git-send-email-ian.campbell@citrix.com>
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To: Ian Campbell <ian.campbell@citrix.com>, xen-devel@lists.xen.org
Cc: keir@xen.org, stefano.stabellini@eu.citrix.com, julien.grall@linaro.org, tim@xen.org, jbeulich@suse.com, Josh Zhao <joshsystem@gmail.com>
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On 10/09/2013 07:18, "Ian Campbell" <ian.campbell@citrix.com> wrote:

> This hardware has an additional feature which signals an error if you try to
> write LCR while the UART is busy. We need to clear this error during setup,
> otherwise LCR.DLAB doesn't get set and we cannot read/write the divisor.
> 
> This has been tested on the cubieboard2
> 
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
> Cc: keir@xen.org
> Cc: jbeulich@suse.com

Acked-by: Keir Fraser <keir@xen.org>