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Date: Fri, 17 Feb 2017 18:14:41 +0000 From: Will Deacon <will.deacon@....com> To: Christopher Covington <cov@...eaurora.org> Cc: Catalin Marinas <catalin.marinas@....com>, Jonathan Corbet <corbet@....net>, linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Marc Zyngier <marc.zyngier@....com>, Russell King <rmk+kernel@...linux.org.uk>, Mark Rutland <mark.rutland@....com>, Peter Hurley <peter@...leysoftware.com>, Aleksey Makarov <aleksey.makarov@...aro.org>, Robin Murphy <robin.murphy@....com>, Shanker Donthineni <shankerd@...eaurora.org>, Timur Tabi <timur@...eaurora.org>, Mark Langsdorf <mlangsdo@...hat.com>, Mark Salter <msalter@...hat.com>, Jon Masters <jcm@...hat.com>, Neil Leeder <nleeder@...eaurora.org>, Steve Ulrich <sulrich@...eaurora.org> Subject: Re: [PATCH] Documentation: Note QDF2400 SoC Erratum 44 On Wed, Feb 15, 2017 at 04:54:07PM -0500, Christopher Covington wrote: > The Qualcomm Datacenter Technologies QDF2400 family of SoCs contains a > custom (non-PrimeCell) implementation of the SBSA UART. Occasionally the > BUSY bit in the Flag Register gets stuck as 1, erratum 44 for both 2432v1 > and 2400v1 SoCs.Checking that the Transmit FIFO Empty (TXFE) bit is 0, > instead of checking that the BUSY bit is 1, works around the issue. Note > this in the customary location. To minimize conflicts, this documentation > update is separate from the code changes, "tty: pl011: Work around QDF2400 > E44 stuck BUSY bit". > > Signed-off-by: Christopher Covington <cov@...eaurora.org> > Acked-by: Russell King <rmk+kernel@...linux.org.uk> > Acked-by: Mark Rutland <mark.rutland@....com> > Acked-by: Timur Tabi <timur@...eaurora.org> > --- > Documentation to go with https://patchwork.kernel.org/patch/9575103/ Please poke me when that goes into -next. I don't want to merge the doc until the patch is queued too. Thanks, Will
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