linux-kernel - Re: [PATCH 06/14] spi: dt-bindings: dw-apb-ssi: update spi-{r,t}x-bus-width for dwc-ssi

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Date:   Mon, 20 Jun 2022 10:02:05 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Conor Dooley <mail@...chuod.ie>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Niklas Cassel <niklas.cassel@....com>,
        Dillon Min <dillon.minfei@...il.com>,
        Heng Sia <jee.heng.sia@...el.com>,
        Jose Abreu <joabreu@...opsys.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        alsa-devel@...a-project.org, linux-spi@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 06/14] spi: dt-bindings: dw-apb-ssi: update
 spi-{r,t}x-bus-width for dwc-ssi

Hi Conor,

On Sat, Jun 18, 2022 at 2:32 PM Conor Dooley <mail@...chuod.ie> wrote:
> From: Conor Dooley <conor.dooley@...rochip.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@...rochip.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@...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