netdev - Re: [PATCH v3 net-next 05/10] dt-bindings: net: dsa: qca8k: utilize shared dsa.yaml

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Date:   Thu, 1 Dec 2022 16:42:40 -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 05/10] dt-bindings: net: dsa: qca8k: utilize
 shared dsa.yaml

On Sun, Nov 27, 2022 at 02:47:29PM -0800, Colin Foster wrote:
> The dsa.yaml binding contains duplicated bindings for address and size
> cells, as well as the reference to dsa-port.yaml. Instead of duplicating
> this information, remove the reference to dsa-port.yaml and include the
> full reference to dsa.yaml.
> 
> Signed-off-by: Colin Foster <colin.foster@...advantage.com>
> Suggested-by: Vladimir Oltean <olteanv@...il.com>
> ---
> 
> v2 -> v3
>   * Remove #address-cells and #size-cells from v2. The examples were
>     incorrect and fixed elsewhere.
>   * Remove erroneous unevaluatedProperties: true under Ethernet Port.
>   * Add back ref: dsa-port.yaml#.
> 
> v1 -> v2
>   * Add #address-cells and #size-cells to the switch layer. They aren't
>     part of dsa.yaml.
>   * Add unevaluatedProperties: true to the ethernet-port layer so it can
>     correctly read properties from dsa.yaml.
> 
> ---
>  Documentation/devicetree/bindings/net/dsa/qca8k.yaml | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/qca8k.yaml b/Documentation/devicetree/bindings/net/dsa/qca8k.yaml
> index 6fc9bc985726..93a9ddebcac8 100644
> --- a/Documentation/devicetree/bindings/net/dsa/qca8k.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/qca8k.yaml
> @@ -66,20 +66,15 @@ properties:
>                   With the legacy mapping the reg corresponding to the internal
>                   mdio is the switch reg with an offset of -1.
>  
> +$ref: "dsa.yaml#"
> +
>  patternProperties:
>    "^(ethernet-)?ports$":
>      type: object
> -    properties:
> -      '#address-cells':
> -        const: 1
> -      '#size-cells':
> -        const: 0
> -
>      patternProperties:
>        "^(ethernet-)?port@[0-6]$":
>          type: object
>          description: Ethernet switch ports
> -
>          $ref: dsa-port.yaml#

So here you need 'unevaluatedProperties: false'.

unevaluatedProperties only applies to the properties defined in a single 
node level, and child nodes properties from 2 schemas can't 'see' each 
other. IOW, what dsa.yaml has in child nodes has no effect on this node. 

>  
>          properties:
> @@ -116,7 +111,7 @@ required:
>    - compatible
>    - reg
>  
> -additionalProperties: true
> +unevaluatedProperties: false

So this has no effect on anything within "^(ethernet-)?port@[0-6]$" and 
below.

Rob