linux-kernel - Re: [PATCH V2 4/5] dt-bindings: spi: spi-nxp-fspi: Add support for imx8mm, imx8qxp

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Date:   Tue, 11 Feb 2020 04:49:39 -0600
From:   Adam Ford <aford173@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-spi <linux-spi@...r.kernel.org>,
        Yogesh Gaur <yogeshgaur.83@...il.com>,
        Ashish Kumar <ashish.kumar@....com>,
        Mark Brown <broonie@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH V2 4/5] dt-bindings: spi: spi-nxp-fspi: Add support for
 imx8mm, imx8qxp

On Thu, Feb 6, 2020 at 2:46 PM Rob Herring <robh@...nel.org> wrote:
>
> On Sun, Feb 02, 2020 at 06:59:49AM -0600, Adam Ford wrote:
> > Add support for nxp,imx8qxp-fspi and nxp,imx8mm-fspi do the bindings
>
> s/do/to/

Oops.  Thanks for catching that.

>
> > document.
> >
> > Signed-off-by: Adam Ford <aford173@...il.com>
> > ---
> > V2: No change
> >
> > diff --git a/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
> > index 2cd67eb727d4..7ac60d9fe357 100644
> > --- a/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
> > +++ b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
> > @@ -2,6 +2,9 @@
> >
> >  Required properties:
> >    - compatible : Should be "nxp,lx2160a-fspi"
> > +                         "nxp,imx8qxp-fspi"
> > +                         "nxp,imx8mm-fspi"
>
> All 3 are different and no compatibility?

This was all based on a series from NXP's repo where they have some
data tables all associated to the various compatible entries, and they
created a place holder for quirks.  Based on an older NXP repo, it
seems like there might be some quirks associated to the different
families, but the newer repo where I got this patch series didn't
implement them, however, it's possible the quirks may enhance
functionality later. If that's true, I think this is the best solution
for future enhancements without having to change the compatibility
names down the road.  Maybe someone from NXP can comment?  I am just
trying to help push things upstream so we can support QSPI flash.  I
would prefer to keep them separate for now, because we might have
these improvements later. However, I'll do what you request.  Do you
want me to drop the additional compatible flags and just use the
original, or create a new one that's a bit more generic?

adam

adam
>
> > +
> >    - reg :        First contains the register location and length,
> >                   Second contains the memory mapping address and length
> >    - reg-names :  Should contain the resource reg names:
> > --
> > 2.24.0
> >