linux-kernel - Re: [PATCH v3 net-next 03/10] dt-bindings: net: dsa: utilize base definitions for standard dsa switches

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Date:   Mon, 28 Nov 2022 17:23:37 -0600
From:   Rob Herring <robh@...nel.org>
To:     Colin Foster <colin.foster@...advantage.com>
Cc:     linux-renesas-soc@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, netdev@...r.kernel.org,
        John Crispin <john@...ozen.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Marek Vasut <marex@...x.de>,
        Sean Wang <sean.wang@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        nç ÜNAL <arinc.unal@...nc9.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Clément Léger <clement.leger@...tlin.com>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Linus Walleij <linus.walleij@...aro.org>,
        UNGLinuxDriver@...rochip.com,
        Woojung Huh <woojung.huh@...rochip.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Vladimir Oltean <olteanv@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        George McCollister <george.mccollister@...il.com>
Subject: Re: [PATCH v3 net-next 03/10] dt-bindings: net: dsa: utilize base
 definitions for standard dsa switches

On Sun, Nov 27, 2022 at 02:47:27PM -0800, Colin Foster wrote:
> DSA switches can fall into one of two categories: switches where all ports
> follow standard '(ethernet-)?port' properties, and switches that have
> additional properties for the ports.
> 
> The scenario where DSA ports are all standardized can be handled by
> swtiches with a reference to 'dsa.yaml#'.
> 
> The scenario where DSA ports require additional properties can reference
> the new '$dsa.yaml#/$defs/base'. This will allow switches to reference
> these base defitions of the DSA switch, but add additional properties under
> the port nodes.

You have this backwards. '$dsa.yaml#/$defs/base' can't be extended. 
Perhaps '$defs/ethernet-ports' would be a better name.

> 
> Suggested-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Colin Foster <colin.foster@...advantage.com>
> ---
> 
> v3
>   * New patch
> 
> ---
>  .../bindings/net/dsa/arrow,xrs700x.yaml       |  2 +-
>  .../devicetree/bindings/net/dsa/brcm,b53.yaml |  2 +-
>  .../devicetree/bindings/net/dsa/dsa.yaml      | 19 ++++++++++++++++---
>  .../net/dsa/hirschmann,hellcreek.yaml         |  2 +-
>  .../bindings/net/dsa/mediatek,mt7530.yaml     |  2 +-
>  .../bindings/net/dsa/microchip,ksz.yaml       |  2 +-
>  .../bindings/net/dsa/microchip,lan937x.yaml   |  2 +-
>  .../bindings/net/dsa/mscc,ocelot.yaml         |  2 +-
>  .../bindings/net/dsa/nxp,sja1105.yaml         |  2 +-
>  .../devicetree/bindings/net/dsa/realtek.yaml  |  2 +-
>  .../bindings/net/dsa/renesas,rzn1-a5psw.yaml  |  2 +-
>  11 files changed, 26 insertions(+), 13 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml b/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
> index 259a0c6547f3..8d5abb05abdf 100644
> --- a/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
> @@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
>  title: Arrow SpeedChips XRS7000 Series Switch Device Tree Bindings
>  
>  allOf:
> -  - $ref: dsa.yaml#
> +  - $ref: dsa.yaml#/$defs/base
>  
>  maintainers:
>    - George McCollister <george.mccollister@...il.com>
> diff --git a/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml b/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
> index 1219b830b1a4..f323fc01b224 100644
> --- a/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
> @@ -66,7 +66,7 @@ required:
>    - reg
>  
>  allOf:
> -  - $ref: dsa.yaml#
> +  - $ref: dsa.yaml#/$defs/base
>    - if:
>        properties:
>          compatible:
> diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.yaml b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> index b9d48e357e77..bd1f0f7c14a8 100644
> --- a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> @@ -19,9 +19,6 @@ description:
>  select: false
>  
>  properties:
> -  $nodename:
> -    pattern: "^(ethernet-)?switch(@.*)?$"
> -
>    dsa,member:
>      minItems: 2
>      maxItems: 2
> @@ -58,4 +55,20 @@ oneOf:
>  
>  additionalProperties: true
>  
> +$defs:
> +  base:
> +    description: A DSA switch without any extra port properties
> +    $ref: '#/'
> +
> +    patternProperties:
> +      "^(ethernet-)?ports$":

This node at the top level needs 'additionalProperties: false' assuming 
we don't allow extra properties in 'ports' nodes. If we do, then we'll 
need to be able to reference the 'ports' schema to extend it like is 
done with dsa-ports.yaml.

> +        type: object
> +
> +        patternProperties:
> +          "^(ethernet-)?ports@[0-9]+$":
> +            description: Ethernet switch ports
> +            $ref: dsa-port.yaml#
> +            unevaluatedProperties: false
> +
> +

One blank line.

>  ...