linux-kernel - Re: [PATCH v2 2/9] dt-bindings: net: snps,dwmac: Update the maxitems number of resets and reset-names

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Date:   Tue, 20 Dec 2022 14:48:36 +0800
From:   yanhong wang <yanhong.wang@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <linux-riscv@...ts.infradead.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     "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>,
        Emil Renner Berthing <kernel@...il.dk>,
        Richard Cochran <richardcochran@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Peter Geis <pgwipeout@...il.com>
Subject: Re: [PATCH v2 2/9] dt-bindings: net: snps,dwmac: Update the maxitems
 number of resets and reset-names



On 2022/12/16 19:03, Krzysztof Kozlowski wrote:
> On 16/12/2022 08:06, Yanhong Wang wrote:
>> Some boards(such as StarFive VisionFive v2) require more than one value
>> which defined by resets property, so the original definition can not
>> meet the requirements. In order to adapt to different requirements,
>> adjust the maxitems number from 1 to 3..
>> 
>> Signed-off-by: Yanhong Wang <yanhong.wang@...rfivetech.com>
>> ---
>>  .../devicetree/bindings/net/snps,dwmac.yaml       | 15 +++++++++++----
>>  1 file changed, 11 insertions(+), 4 deletions(-)
>> 
>> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> index e26c3e76ebb7..7870228b4cd3 100644
>> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> @@ -133,12 +133,19 @@ properties:
>>          - ptp_ref
>>  
>>    resets:
>> -    maxItems: 1
>> -    description:
>> -      MAC Reset signal.
>> +    minItems: 1
>> +    maxItems: 3
>> +    additionalItems: true
>> +    items:
>> +      - description: MAC Reset signal
>>  
>>    reset-names:
>> -    const: stmmaceth
>> +    minItems: 1
>> +    maxItems: 3
>> +    additionalItems: true
>> +    contains:
>> +      enum:
>> +        - stmmaceth
> 
> No, this is highly unspecific and you know affect all the schemas using
> snps,dwmac.yaml. Both lists must be specific - for your device and for
> others.
> 

I have tried to define the resets in "starfive,jh71x0-dwmac.yaml", but it can not over-write the maxItems limit in "snps,dwmac.yaml",therefore, it will report error "reset-names: ['stmmaceth', 'ahb'] is too long"  running "make dt_binding_check". Do you have any suggestions to deal with this situation?

> Best regards,
> Krzysztof
>