linux-kernel - Re: [PATCH] Documentation: Note QDF2400 SoC Erratum 44

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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