linux-kernel - Re: [PATCH v5 2/2] mmc: sdhci-cadence: add Cadence SD4HC support

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Message-ID: <CAPDyKFqmTP1+pe7UNavOAZA0QWFOu8M4FcQOpGkqZj=nnpP9qA@mail.gmail.com>
Date:   Fri, 16 Dec 2016 12:07:42 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Rob Herring <robh@...nel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Douglas Anderson <dianders@...omium.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Al Cooper <alcooperx@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Andrei Pistirica <andrei.pistirica@...rochip.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Mark Rutland <mark.rutland@....com>,
        Simon Horman <horms+renesas@...ge.net.au>
Subject: Re: [PATCH v5 2/2] mmc: sdhci-cadence: add Cadence SD4HC support

[...]

>>
>> I think a better approach is to use the new sdhci-caps* bindings to
>> mask those caps that can't be trusted. And then use the generic mmc
>> bindings for speed modes instead.
>>
>> That should be a safer approach, right!?
>
> Right.
>
> But, if I know the caps register bits 63-32 are all zero,
> I need not explicitly specify sdhci-caps-mask, right?

Maybe not. I don't have a strong opinion here, so l am fine with
whatever you choose.

Kind regards
Uffe