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Re: [Xen-devel] [PATCH RFC 4/8] ns16550: support DesignWare 8250

On 10/09/2013 07:18, "Ian Campbell" <ian.campbell@xxxxxxxxxx> 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@xxxxxxxxxx>
> Cc: keir@xxxxxxx
> Cc: jbeulich@xxxxxxxx

Acked-by: Keir Fraser <keir@xxxxxxx>

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