Re: [PATCH 2/4] dt-bindings: net: dsa: document internal MDIO bus

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On Sat, Aug 12, 2023 at 10:20:43PM +0300, Arınç ÜNAL wrote:
> I've realised there are more schemas that extend the mdio.yaml schema. This
> is the final state of this patch.
> 
> dt-bindings: net: dsa: document internal MDIO bus
> 
> Add the schema to document the internal MDIO bus. Require the phy-handle
> property on the non-CPU ports if the mdio property is being used.
> 
> Define the mdio property on all of the schemas that refer to
> dsa.yaml#/$defs/ethernet-ports. Refer to dsa.yaml#/properties/mdio to point
> the human readers to the description on the dsa.yaml schema.
> 
> Some of these schemas extend the mdio.yaml schema. The mdio.yaml schema is
> also being referred to through dsa.yaml#/$defs/ethernet-ports now which
> means we cannot disallow additional properties by 'unevaluatedProperties:
> false' on the dsa.yaml schema.
> 
> ---
>  .../bindings/net/dsa/arrow,xrs700x.yaml        |  4 ++++
>  .../devicetree/bindings/net/dsa/brcm,b53.yaml  |  4 ++++
>  .../devicetree/bindings/net/dsa/brcm,sf2.yaml  |  4 ++++
>  .../devicetree/bindings/net/dsa/dsa.yaml       | 18 ++++++++++++++++++
>  .../bindings/net/dsa/hirschmann,hellcreek.yaml |  4 ++++
>  .../bindings/net/dsa/mediatek,mt7530.yaml      |  4 ++++
>  .../bindings/net/dsa/microchip,ksz.yaml        |  4 ++++
>  .../bindings/net/dsa/microchip,lan937x.yaml    |  2 +-
>  .../bindings/net/dsa/mscc,ocelot.yaml          |  4 ++++
>  .../bindings/net/dsa/nxp,sja1105.yaml          |  4 ++++
>  .../devicetree/bindings/net/dsa/qca8k.yaml     |  2 +-
>  .../devicetree/bindings/net/dsa/realtek.yaml   |  2 +-
>  .../bindings/net/dsa/renesas,rzn1-a5psw.yaml   |  2 +-
>  13 files changed, 54 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml b/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
> index 9565a740214629..f0229352e05694 100644
> --- a/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
> @@ -29,6 +29,10 @@ properties:
>    reg:
>      maxItems: 1
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml b/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
> index 4c78c546343f5e..e14562b33bfb97 100644
> --- a/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
> @@ -65,6 +65,10 @@ properties:
>                - brcm,bcm63268-switch
>            - const: brcm,bcm63xx-switch
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/net/dsa/brcm,sf2.yaml b/Documentation/devicetree/bindings/net/dsa/brcm,sf2.yaml
> index c745407f2f6853..1bf4317e038687 100644
> --- a/Documentation/devicetree/bindings/net/dsa/brcm,sf2.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/brcm,sf2.yaml
> @@ -90,6 +90,10 @@ properties:
>                tags enabled (per-packet metadata)
>              type: boolean
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  required:
>    - reg
>    - interrupts
> diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.yaml b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> index ec74a660bedaed..03ccedbc49dcc3 100644
> --- a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> @@ -31,6 +31,24 @@ properties:
>        (single device hanging off a CPU port) must not specify this property
>      $ref: /schemas/types.yaml#/definitions/uint32-array
> +  mdio:
> +    description: The internal MDIO bus of the switch
> +    $ref: /schemas/net/mdio.yaml#
> +
> +if:
> +  required: [ mdio ]
> +then:
> +  patternProperties:
> +    "^(ethernet-)?ports$":
> +      patternProperties:
> +        "^(ethernet-)?port@[0-9]+$":
> +          if:
> +            not:
> +              required: [ ethernet ]
> +          then:
> +            required:
> +              - phy-handle
> +
>  additionalProperties: true
>  $defs:
> diff --git a/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml b/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
> index 4021b054f68446..32f17345825d4a 100644
> --- a/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
> @@ -67,6 +67,10 @@ properties:
>      additionalProperties: false
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> index e532c6b795f4fc..293d1affe75451 100644
> --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> @@ -151,6 +151,10 @@ properties:
>        ethsys.
>      maxItems: 1
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  patternProperties:
>    "^(ethernet-)?ports$":
>      type: object
> diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> index e51be1ac036237..01d11c642ecfd4 100644
> --- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> @@ -49,6 +49,10 @@ properties:
>        Set if the output SYNCLKO clock should be disabled. Do not mix with
>        microchip,synclko-125.
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml
> index 49af4b0d591695..15f24a1716cd44 100644
> --- a/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml
> @@ -32,7 +32,7 @@ properties:
>      maxItems: 1
>    mdio:
> -    $ref: /schemas/net/mdio.yaml#
> +    $ref: dsa.yaml#/properties/mdio
>      unevaluatedProperties: false
>  patternProperties:
> diff --git a/Documentation/devicetree/bindings/net/dsa/mscc,ocelot.yaml b/Documentation/devicetree/bindings/net/dsa/mscc,ocelot.yaml
> index fe02d05196e4a6..d781b8c2324836 100644
> --- a/Documentation/devicetree/bindings/net/dsa/mscc,ocelot.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/mscc,ocelot.yaml
> @@ -73,6 +73,10 @@ properties:
>    little-endian: true
>    big-endian: true
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
> index 4d5f5cc6d031e2..82dda8fae8b16e 100644
> --- a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
> @@ -72,6 +72,10 @@ properties:
>            - compatible
>            - reg
> +  mdio:
> +    $ref: dsa.yaml#/properties/mdio
> +    unevaluatedProperties: false
> +
>  patternProperties:
>    "^(ethernet-)?ports$":
>      patternProperties:
> diff --git a/Documentation/devicetree/bindings/net/dsa/qca8k.yaml b/Documentation/devicetree/bindings/net/dsa/qca8k.yaml
> index df64eebebe1856..001b72bcd0746b 100644
> --- a/Documentation/devicetree/bindings/net/dsa/qca8k.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/qca8k.yaml
> @@ -60,7 +60,7 @@ properties:
>        B68 on the QCA832x and B49 on the QCA833x.
>    mdio:
> -    $ref: /schemas/net/mdio.yaml#
> +    $ref: dsa.yaml#/properties/mdio
>      unevaluatedProperties: false

Just from a schema standpoint, this is pointless indirection as 
dsa.yaml#/properties/mdio is just a reference to /schemas/net/mdio.yaml#.

As it seems an MDIO bus is not universal for DSA, it seems you'll be 
dropping this change anyways.

Rob



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