netdev - Re: [PATCH 3/7] dt-bindings: net: dsa: mediatek,mt7530: add port bindings for MT7988

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Date:   Wed, 12 Apr 2023 18:39:31 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Daniel Golle <daniel@...rotopia.org>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Sean Wang <sean.wang@...iatek.com>
Cc:     erkin.bozoglu@...ont.com, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 3/7] dt-bindings: net: dsa: mediatek,mt7530: add port
 bindings for MT7988

On 07/04/2023 11:46, Arınç ÜNAL wrote:
> On 7.04.2023 12:07, Krzysztof Kozlowski wrote:
>> On 06/04/2023 21:18, Arınç ÜNAL wrote:
>>> On 6.04.2023 22:07, Krzysztof Kozlowski wrote:
>>>> On 06/04/2023 10:01, arinc9.unal@...il.com wrote:
>>>>> From: Arınç ÜNAL <arinc.unal@...nc9.com>
>>>>>
>>>>> The switch on MT7988 has got only port 6 as a CPU port. The only phy-mode
>>>>> to be used is internal. Add this.
>>>>>
>>>>> Some bindings are incorrect for this switch now, so move them to more
>>>>> specific places.
>>>>>
>>>>> Address the incorrect information of which ports can be used as a user
>>>>> port. Any port can be used as a user port.
>>>>>
>>>>> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
>>>>> ---
>>>>>    .../bindings/net/dsa/mediatek,mt7530.yaml     | 63 ++++++++++++++-----
>>>>>    1 file changed, 46 insertions(+), 17 deletions(-)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
>>>>> index 7045a98d9593..605888ce2bc6 100644
>>>>> --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
>>>>> +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
>>>>> @@ -160,22 +160,6 @@ patternProperties:
>>>>>          "^(ethernet-)?port@[0-9]+$":
>>>>>            type: object
>>>>>    
>>>>> -        properties:
>>>>> -          reg:
>>>>> -            description:
>>>>> -              Port address described must be 5 or 6 for CPU port and from 0 to 5
>>>>> -              for user ports.
>>>>> -
>>>>> -        allOf:
>>>>> -          - if:
>>>>> -              required: [ ethernet ]
>>>>> -            then:
>>>>> -              properties:
>>>>> -                reg:
>>>>> -                  enum:
>>>>> -                    - 5
>>>>> -                    - 6
>>>>> -
>>>>
>>>> I have doubts that the binding is still maintainable/reviewable. First,
>>>> why do you need all above patterns after removal of entire contents?
>>>
>>> The 'type: object' item is still globally used. I'd have to define that
>>> on each definitions, I suppose?
>>
>> Doesn't it come from dsa.yaml/dsa-port.yaml schema?
> 
> It comes from dsa.yaml#/$defs/ethernet-ports which this schema already 
> refers to. I'll remove the patterns above.
> 
> Though 'type: object' is not there for "^(ethernet-)?port@[0-9]+$". I 
> think I should add it there as the dsa-port.yaml schema defines the 
> properties of the DSA switch port object. 

It has ref, which is enough.

> So the value matching the 
> "^(ethernet-)?port@[0-9]+$" regular expression is expected to be an 
> object conforming to the structure defined in dsa-port.yaml.
> 
> Does that make sense?

Hm, no, sorry, I still do not see what exactly is missing from
dsa.yaml/port that you need to define here.


Best regards,
Krzysztof