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Date:   Fri, 17 Feb 2017 18:14:41 +0000
From:   Will Deacon <>
To:     Christopher Covington <>
Cc:     Catalin Marinas <>,
        Jonathan Corbet <>,,,,
        Greg Kroah-Hartman <>,
        Marc Zyngier <>,
        Russell King <>,
        Mark Rutland <>,
        Peter Hurley <>,
        Aleksey Makarov <>,
        Robin Murphy <>,
        Shanker Donthineni <>,
        Timur Tabi <>,
        Mark Langsdorf <>,
        Mark Salter <>, Jon Masters <>,
        Neil Leeder <>,
        Steve Ulrich <>
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 <>
> Acked-by: Russell King <>
> Acked-by: Mark Rutland <>
> Acked-by: Timur Tabi <>
> ---
> Documentation to go with

Please poke me when that goes into -next. I don't want to merge the doc
until the patch is queued too.



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