linux-kernel - Re: [PATCH 3/3] ARM: dts: r8a7742-iwg21m: Add SPI NOR support

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Date:   Fri, 21 Aug 2020 15:00:55 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] ARM: dts: r8a7742-iwg21m: Add SPI NOR support

Hi Geert,

Thank you for the review.

On Fri, Aug 21, 2020 at 2:33 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Sun, Aug 16, 2020 at 9:33 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > Add support for the SPI NOR device used to boot up the system
> > to the System on Module DT.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Reviewed-by: Chris Paterson <Chris.Paterson2@...esas.com>
>
> Thanks for your patch!
>
> > --- a/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
> > +++ b/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
>
> > @@ -70,4 +80,28 @@
> >                 groups = "mmc1_data4", "mmc1_ctrl";
> >                 function = "mmc1";
> >         };
> > +
> > +       qspi_pins: qspi {
> > +               groups = "qspi_ctrl", "qspi_data2";
> > +               function = "qspi";
> > +       };
> > +};
> > +
> > +&qspi {
> > +       pinctrl-0 = <&qspi_pins>;
> > +       pinctrl-names = "default";
> > +
> > +       status = "okay";
> > +
> > +       /* WARNING - This device contains the bootloader. Handle with care. */
> > +       flash: flash@0 {
> > +               #address-cells = <1>;
> > +               #size-cells = <1>;
>
> #{address,size}-cells are not needed, unless you list legacy partitions
> (i.e. partitions not contained in a "partitions" container).
>
Agreed will drop it.

> > +               compatible = "sst,sst25vf016b", "jedec,spi-nor";
> > +               reg = <0>;
> > +               spi-max-frequency = <50000000>;
> > +               m25p,fast-read;
> > +               spi-cpol;
> > +               spi-cpha;
>
> Perhaps you want to add the partition layout, too?
>
will do.

> > +       };
> >  };
>
> With the above fixed/clarified:
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
>
Thank you. I shall post this lone patch fixing the above.

Cheers,
Prabhakar

> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds