From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 0/2] rewrite mtk-quadspi spi-nor driver with spi-mem
Date: Wed, 26 Feb 2020 11:36:10 +0000
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Cc: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
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        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
        <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
        Miquel Raynal <miquel.raynal-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org>,
        Richard Weinberger <richard-/L3Ra7n9ekc@public.gmane.org>,
        Vignesh Raghavendra <vigneshr-l0cyMroinI0@public.gmane.org>,
        Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
        Matthias Brugger <matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
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        open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
To: Chuanhong Guo <gch981213-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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On Wed, Feb 26, 2020 at 09:31:33AM +0800, Chuanhong Guo wrote:
> On Wed, Feb 26, 2020 at 1:31 AM Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:

> > You should should really only need 'spi-max-frequency' if the max freq
> > is less than the minimum of the host and device max freq.

> But current spi framework forces that a "spi-max-frequency" property
> is present. [0]
> Should we patch spi framework then?

That's one option, yes.  As far as I can tell the bindings have always
required an explicit frequency specified in the bindings but I've no
idea why.

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