Re: [PATCH v5 net-next 04/10] dt-bindings: net: dsa: utilize base definitions for standard dsa switches

Arınç ÜNAL
2022-12-12T09:29:56Z

On 10.12.2022 21:02, Colin Foster wrote:
> Hi Arınç,
> On Sat, Dec 10, 2022 at 07:24:42PM +0300, Arınç ÜNAL wrote:
>> On 10.12.2022 06:30, Colin Foster wrote:
>>> DSA a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
>>> +++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
>>> @@ -58,4 +58,26 @@ oneOf:
>>> additionalProperties: true
>>> +$defs:
>>> + ethernet-ports:
>>> + description: A DSA switch without any extra port properties
>>> + $ref: '#/'
>>> +
>>> + patternProperties:
>>> + "^(ethernet-)?ports$":
>>> + type: object
>>> + additionalProperties: false
>>> +
>>> + properties:
>>> + '#address-cells':
>>> + const: 1
>>> + '#size-cells':
>>> + const: 0
>>> +
>>> + patternProperties:
>>> + "^(ethernet-)?port@[0-9]+$":
>>> + description: Ethernet switch ports
>>> + $ref: dsa-port.yaml#
>>> + unevaluatedProperties: false
>>
>> I've got moderate experience in json-schema but shouldn't you put 'type:
>> object' here like you did for "^(ethernet-)?ports$"?
>
> I can't say for sure, but adding "type: object" here and removing it
> from mediatek,mt7530.yaml still causes the same issue I mention below.
>
> Rob's initial suggestion for this patch set (which was basically the
> entire implementation... many thanks again Rob) can be found here:
> https://lore.kernel.org/netdev/20221104200212.GA2315642-robh@kernel.org/
>
> From what I can tell, the omission of "type: object" here was
> intentional. At the very least, it doesn't seem to have any effect on
> warnings.
>
>>
>>> +
>>> ...
>>> diff --git a/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml b/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
>>> index 73b774eadd0b..748ef9983ce2 100644
>>> --- a/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
>>> +++ b/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
>>> @@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
>>> title: Hirschmann Hellcreek TSN Switch Device Tree Bindings
>>> allOf:
>>> - - $ref: dsa.yaml#
>>> + - $ref: dsa.yaml#/$defs/ethernet-ports
>>> maintainers:
>>> - Andrew Lunn <andrew@lunn.ch>
>>> diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
>>> index f2e9ff3f580b..20312f5d1944 100644
>>> --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
>>> +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
>>> @@ -157,9 +157,6 @@ patternProperties:
>>> patternProperties:
>>> "^(ethernet-)?port@[0-9]+$":
>>> type: object
>>
>> This line was being removed on the previous version. Must be related to
>> above.
>
> Without the 'object' type here, I get the following warning:
>
> Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml: patternProperties:^(ethernet-)?ports$:patternProperties:^(ethernet-)?port@[0-9]+$: 'anyOf' conditional failed, one must be fixed:
> 'type' is a required property
> '$ref' is a required property
> hint: node schemas must have a type or $ref
> from schema $id: http://devicetree.org/meta-schemas/core.yaml#
> ./Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml: Error in referenced schema matching $id: http://devicetree.org/schemas/net/dsa/mediatek,mt7530.yaml
> SCHEMA Documentation/devicetree/bindings/processed-schema.json
> /home/colin/src/work/linux_vsc/linux-imx/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml: ignoring, error in schema: patternProperties: ^(ethernet-)?ports$: patternProperties: ^(ethernet-)?port@[0-9]+$
>
>
> I'm testing this now and I'm noticing something is going on with the
> "ref: dsa-port.yaml"
>
>
> Everything seems to work fine (in that I don't see any warnings) when I
> have this diff:
>
>
> diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> index 20312f5d1944..db0122020f98 100644
> --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yam
> @@ -156,8 +156,7 @@ patternProperties:
>
> patternProperties:
> "^(ethernet-)?port@[0-9]+$":
> - type: object
> -
> + $ref: dsa-port.yaml#
> properties:
> reg:
> description:
> @@ -165,7 +164,6 @@ patternProperties:
> for user ports.
>
> allOf:
> - - $ref: dsa-port.yaml#
> - if:
> required: [ ethernet ]
> then:
>
>
>
> This one has me [still] scratching my head...

Right there with you. In addition to this, having or deleting type
object on/from "^(ethernet-)?ports$" and "^(ethernet-)?port@[0-9]+$" on
dsa.yaml doesn't cause any warnings (checked with make dt_binding_check
DT_SCHEMA_FILES=net/dsa) which makes me question why it's there in the
first place.

Arınç