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Date: Wed, 27 Nov 2013 18:46:28 -0800 From: Tim Kryger <tim.kryger@...aro.org> To: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Heikki Krogerus <heikki.krogerus@...ux.intel.com>, linux-serial@...r.kernel.org, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Patch Tracking <patches@...aro.org>, Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, Gregory Clement <gregory.clement@...e-electrons.com>, Lior Amsalem <alior@...vell.com>, Jason Cooper <jason@...edaemon.net>, ARM Kernel List <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH v2] serial: 8250_dw: Improve unwritable LCR workaround On Wed, Nov 27, 2013 at 10:54 AM, Ezequiel Garcia <ezequiel.garcia@...e-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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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