Messages in this thread | | | Date | Wed, 27 Nov 2013 18:46:28 -0800 | Subject | Re: [PATCH v2] serial: 8250_dw: Improve unwritable LCR workaround | From | Tim Kryger <> |
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On Wed, Nov 27, 2013 at 10:54 AM, Ezequiel Garcia <ezequiel.garcia@free-electrons.com> wrote: > On Tue, Nov 26, 2013 at 03:03:03PM -0800, Tim Kryger wrote:
>> An external device may be keeping the UART busy and preventing LCR >> from being written. >> >> What device is attached to ttyS1? > > There's no device attached at ttyS1. I've just tested this in another > box and it seems the same error is obtained on each unused port:
Do you know if your UART pins have pull up resistors?
If you can, try attaching something to an unused port.
-Tim
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