From: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Adam Ford <aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-spi <linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Yogesh Gaur
<yogeshgaur.83-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Ashish Kumar <ashish.kumar-3arQi8VN3Tc@public.gmane.org>,
Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Shawn Guo <shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
Pengutronix Kernel Team
<kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
Fabio Estevam <festevam-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
NXP Linux Team <linux-imx-3arQi8VN3Tc@public.gmane.org>,
devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
arm-soc
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH V2 4/5] dt-bindings: spi: spi-nxp-fspi: Add support for imx8mm, imx8qxp
Date: Tue, 11 Feb 2020 12:05:01 -0600 [thread overview]
Message-ID: <CAL_JsqLJweVLgYhoU-3cmg1aFwRNtAehx2-Euy-cwUsRy2jsgw@mail.gmail.com> (raw)
In-Reply-To: <CAHCN7x+uCwyJ60ZG_0m5SgNmqUAyEwxqXVTL7nQzJLXxXrh+Tw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Tue, Feb 11, 2020 at 4:49 AM Adam Ford <aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> On Thu, Feb 6, 2020 at 2:46 PM Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > > ---
> > > 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?
Neither.
If you already know that they have differences, then as-is is fine.
If they are believed to be 'the same', then you do:
compatible = "nxp,imx8qxp-fspi", "nxp,imx8mm-fspi";
assuming i.MX8MM was the first version.
This allows a MX8QXP to work without OS changes if the driver already
supports the previous chip. And if any quirks are found, then the OS
can handle them without a DT change.
Rob
next prev parent reply other threads:[~2020-02-11 18:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-02 12:59 [PATCH V2 1/5] spi: fspi: enable fspi on imx8qxp and imx8mm Adam Ford
[not found] ` <20200202125950.1825013-1-aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-02 12:59 ` [PATCH V2 2/5] spi: fspi: dynamically alloc AHB memory Adam Ford
[not found] ` <20200202125950.1825013-2-aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-02 16:39 ` Fabio Estevam
[not found] ` <CAOMZO5D3emrAk84wDS04qJC-3AyvFnqodhoMsXO-ukHnYsU+PQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-02-03 10:53 ` Adam Ford
[not found] ` <CAHCN7xJyZRwJhnWW2mAbOeGyrMsB7Au_e6AvwiNmNS8gFUfSyw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-02-12 12:07 ` Mark Brown
[not found] ` <20200212120753.GF4028-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2020-02-12 13:08 ` Adam Ford
[not found] ` <CAHCN7x+5bACfYVX49Lib+fmNq-dEOkcyi0gXt7rtYxrGaYbH1Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-02-13 18:46 ` Mark Brown
[not found] ` <20200213184624.GK4333-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2020-02-15 16:14 ` [EXT] " Han Xu
2020-02-02 12:59 ` [PATCH V2 4/5] dt-bindings: spi: spi-nxp-fspi: Add support for imx8mm, imx8qxp Adam Ford
[not found] ` <20200202125950.1825013-4-aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-06 18:40 ` Rob Herring
2020-02-11 10:49 ` Adam Ford
[not found] ` <CAHCN7x+uCwyJ60ZG_0m5SgNmqUAyEwxqXVTL7nQzJLXxXrh+Tw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-02-11 18:05 ` Rob Herring [this message]
2020-02-02 12:59 ` [PATCH V2 5/5] arm64: dts: enable fspi in imx8mm dts Adam Ford
[not found] ` <20200202125950.1825013-5-aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-14 3:36 ` Shawn Guo
2020-02-02 12:59 ` [PATCH V2 3/5] spi: spi-nxp-fspi: Enable the Octal Mode in MCR0 Adam Ford
[not found] ` <20200202125950.1825013-3-aford173-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-12 12:04 ` Mark Brown
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