linux-kernel - Re: [RFC v2 1/2] sdhci: Add device tree property broken-highspeed

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Message-ID: <20161018131756.ghnehvr2e2hsqznd@rob-hp-laptop>
Date:   Tue, 18 Oct 2016 08:17:56 -0500
From:   Rob Herring <robh@...nel.org>
To:     Zach Brown <zach.brown@...com>
Cc:     ulf.hansson@...aro.org, adrian.hunter@...el.com,
        mark.rutland@....com, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC v2 1/2] sdhci: Add device tree property broken-highspeed

On Wed, Oct 12, 2016 at 01:40:55PM -0500, Zach Brown wrote:
> Certain board configurations can make highspeed malfuction due to timing
> issues. In these cases a way is needed to force the controller and card
> into standard speed even if they otherwise appear to be capable of
> highspeed.
> 
> The broken-highspeed property will let the sdhci driver know that
> highspeed will not work.
> 
> Signed-off-by: Zach Brown <zach.brown@...com>
> ---
>  Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++
>  1 file changed, 2 insertions(+)

Acked-by: Rob Herring <robh@...nel.org>