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

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Message-ID: <20161003173708.GA15916@rob-hp-laptop>
Date:   Mon, 3 Oct 2016 12:37:08 -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 1/2] sdhci: Add device tree property sd-broken-highspeed

On Fri, Sep 23, 2016 at 03:01:08PM -0500, Zach Brown wrote:
> Certain board configurations can make highspeed malfunction 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 sd-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>