netdev - Re: [PATCH v4 2/6] dt-bindings: can: nxp,sja1000: Document RZ/N1{D,S} support

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Date:   Thu, 18 Aug 2022 11:38:52 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Biju Das <biju.das.jz@...renesas.com>
Cc:     Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v4 2/6] dt-bindings: can: nxp,sja1000: Document RZ/N1{D,S} support

Hi Biju,

On Sun, Jul 10, 2022 at 1:53 PM Biju Das <biju.das.jz@...renesas.com> wrote:
> Add CAN binding documentation for Renesas RZ/N1 SoC.
>
> The SJA1000 CAN controller on RZ/N1 SoC has some differences compared
> to others like it has no clock divider register (CDR) support and it has
> no HW loopback (HW doesn't see tx messages on rx), so introduced a new
> compatible 'renesas,rzn1-sja1000' to handle these differences.
>
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>

Thanks for your patch, which is now commit 4591c760b7975984
("dt-bindings: can: nxp,sja1000: Document RZ/N1{D,S} in v6.0-rc1.

> --- a/Documentation/devicetree/bindings/net/can/nxp,sja1000.yaml
> +++ b/Documentation/devicetree/bindings/net/can/nxp,sja1000.yaml
> @@ -11,9 +11,15 @@ maintainers:
>
>  properties:
>    compatible:
> -    enum:
> -      - nxp,sja1000
> -      - technologic,sja1000
> +    oneOf:
> +      - enum:
> +          - nxp,sja1000
> +          - technologic,sja1000
> +      - items:
> +          - enum:
> +              - renesas,r9a06g032-sja1000 # RZ/N1D
> +              - renesas,r9a06g033-sja1000 # RZ/N1S
> +          - const: renesas,rzn1-sja1000 # RZ/N1
>
>    reg:
>      maxItems: 1
> @@ -21,6 +27,9 @@ properties:
>    interrupts:
>      maxItems: 1
>
> +  clocks:
> +    maxItems: 1
> +

Probably you want to add the power-domains property, and make it
required on RZ/N1.
This is not super-critical, as your driver patch uses explicit clock
handling anyway.

>    reg-io-width:
>      $ref: /schemas/types.yaml#/definitions/uint32
>      description: I/O register width (in bytes) implemented by this device


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