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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 20 Jun 2022 10:02:05 +0200
Message-ID: <CAMuHMdXtjZVvy-gGTksVRYa+dS7-1ngQf9_kfp6k29nkfizKbA@mail.gmail.com>
Subject: Re: [PATCH 06/14] spi: dt-bindings: dw-apb-ssi: update
 spi-{r,t}x-bus-width for dwc-ssi
To:     Conor Dooley <mail@conchuod.ie>
Cc:     David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>,
        Vinod Koul <vkoul@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Serge Semin <fancer.lancer@gmail.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Palmer Dabbelt <palmer@rivosinc.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Conor Dooley <conor.dooley@microchip.com>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Damien Le Moal <damien.lemoal@opensource.wdc.com>,
        Niklas Cassel <niklas.cassel@wdc.com>,
        Dillon Min <dillon.minfei@gmail.com>,
        Heng Sia <jee.heng.sia@intel.com>,
        Jose Abreu <joabreu@synopsys.com>,
        dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
        alsa-devel@alsa-project.org, linux-spi@vger.kernel.org,
        linux-riscv@lists.infradead.org
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Hi Conor,

On Sat, Jun 18, 2022 at 2:32 PM Conor Dooley <mail@conchuod.ie> wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
>
> snps,dwc-ssi-1.01a has a single user - the Canaan k210, which uses a
> width of 4 for spi-{r,t}x-bus-width. Update the binding to reflect
> this.
>
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Thanks for your patch!

> --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> @@ -135,19 +135,41 @@ properties:
>        of the designware controller, and the upper limit is also subject to
>        controller configuration.
>
> -patternProperties:
> -  "^.*@[0-9a-f]+$":
> -    type: object
> -    properties:
> -      reg:
> -        minimum: 0
> -        maximum: 3
> -
> -      spi-rx-bus-width:
> -        const: 1
> -
> -      spi-tx-bus-width:
> -        const: 1
> +if:
> +  properties:
> +    compatible:
> +      contains:
> +        const: snps,dwc-ssi-1.01a
> +
> +then:
> +  patternProperties:
> +    "^.*@[0-9a-f]+$":
> +      type: object
> +      properties:
> +        reg:
> +          minimum: 0
> +          maximum: 3
> +
> +        spi-rx-bus-width:
> +          const: 4
> +
> +        spi-tx-bus-width:
> +          const: 4

These two also depend on the board (SPI device + wiring).
So all of [1, 2, 4] are valid values.

> +
> +else:
> +  patternProperties:
> +    "^.*@[0-9a-f]+$":
> +      type: object
> +      properties:
> +        reg:
> +          minimum: 0
> +          maximum: 3
> +
> +        spi-rx-bus-width:
> +          const: 1
> +
> +        spi-tx-bus-width:
> +          const: 1
>
>  unevaluatedProperties: false

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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