linux-kernel - Re: [PATCH v3 1/3] dt-bindings: qspi: cdns,qspi-nor: Add clocks for StarFive JH7110 SoC

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Date:   Tue, 27 Jun 2023 15:53:20 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <devicetree@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
CC:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Ziv Xu <ziv.xu@...rfivetech.com>
Subject: Re: [PATCH v3 1/3] dt-bindings: qspi: cdns,qspi-nor: Add clocks for
 StarFive JH7110 SoC



On 2023/6/21 16:10, Krzysztof Kozlowski wrote:
> On 21/06/2023 08:45, William Qiu wrote:
>> 
>> 
>> On 2023/6/19 20:17, Krzysztof Kozlowski wrote:
>>> On 19/06/2023 10:35, William Qiu wrote:
>>>> The QSPI controller needs three clock items to work properly on StarFive
>>>> JH7110 SoC, so there is need to change the maxItems's value to 3. Other
>>>> platforms do not have this constraint.
>>>>
>>>> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
>>>> Reviewed-by: Hal Feng <hal.feng@...rfivetech.com>
>>>> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
>>>> ---
>>>>  .../bindings/spi/cdns,qspi-nor.yaml           | 20 ++++++++++++++++++-
>>>>  1 file changed, 19 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
>>>> index b310069762dd..1b83cbb9a086 100644
>>>> --- a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
>>>> +++ b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
>>>> @@ -26,6 +26,15 @@ allOf:
>>>>              const: starfive,jh7110-qspi
>>>>      then:
>>>>        properties:
>>>> +        clocks:
>>>> +          maxItems: 3
>>>> +
>>>> +        clock-names:
>>>> +          items:
>>>> +            - const: ref
>>>> +            - const: ahb
>>>> +            - const: apb
>>>
>>> You are duplicating top-level property. Define the items only in one
>>> place. If this list is applicable to everything, then in top-level property.
>>>
>> Only in JH7110 SoC need there clocks, other platforms do not have this constraint.
>> So I need to duplicating top-level property.
> 
> You don't need, why? Why writing something twice is an answer to "JH7110
> needs 3 clocks"? It's not related.
> 
> What is the clock for all other variants?
> 
I'll try to not duplicating top-level property.
>>>> +
>>>>          resets:
>>>>            minItems: 2
>>>>            maxItems: 3
>>>> @@ -38,6 +47,9 @@ allOf:
>>>>  
>>>>      else:
>>>>        properties:
>>>> +        clocks:
>>>> +          maxItems: 1
>>>
>>> clock-names is missing. They must be in sync with clocks. What is the
>>> first clock?
>>>
>> But there are no clock-names before, should I add it?
> 
> Then let's just disallow it. Either you define it or you not allow it.
> 
Fine, I'll keep it disallow.
>>>> +
>>>>          resets:
>>>>            maxItems: 2
>>>>  
>>>> @@ -70,7 +82,13 @@ properties:
>>>>      maxItems: 1
>>>>  
>>>>    clocks:
>>>> -    maxItems: 1
>>>> +    maxItems: 3
>>>
>>>
>>> You did not test it before sending. minItems is missing.
>>>
>> I will add it.
>> As for other platforms, should I use enum to constraint the clocks?
> 
> What is the clock on other platforms?
> 
Other platforms have only one clock.
> Best regards,
> Krzysztof
> 
Thanks for taking time to review this patch series and give usefull
suggestions.

Best Regards,
William