linux-kernel - Re: [PATCH v2 1/2] dt-bindings: cdns,usb3: Add clock and reset

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Date:   Thu, 11 May 2023 16:49:01 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Roger Quadros <rogerq@...nel.org>,
        Minda Chen <minda.chen@...rfivetech.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Pawel Laszczak <pawell@...ence.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Chen <peter.chen@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: cdns,usb3: Add clock and reset

On 11/05/2023 14:16, Roger Quadros wrote:
> 
> 
> On 11/05/2023 12:26, Krzysztof Kozlowski wrote:
>> On 10/05/2023 15:28, Minda Chen wrote:
>>> To support generic clock and reset init in Cadence USBSS
>>> controller, add clock and reset dts configuration.
>>>
>>> Signed-off-by: Minda Chen <minda.chen@...rfivetech.com>
>>> ---
>>>  .../devicetree/bindings/usb/cdns,usb3.yaml         | 14 ++++++++++++++
>>>  1 file changed, 14 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
>>> index cae46c4982ad..623c6b34dee3 100644
>>> --- a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
>>> +++ b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
>>> @@ -42,6 +42,18 @@ properties:
>>>        - const: otg
>>>        - const: wakeup
>>>  
>>> +  clocks:
>>> +    minItems: 1
>>> +    maxItems: 8
>>> +    description:
>>> +      USB controller clocks.
>>
>> You need to list the items. And why is it variable? Your clock choice in
>> the example is poor, I doubt it is real.
>>
>>> +
>>> +  resets:
>>> +    minItems: 1
>>> +    maxItems: 8
>>> +    description:
>>> +      USB controller generic resets.
>>
>> Here as well.
>>
>> You had one clock last time, thus the review was - drop the names. Now
>> you changed it to 8 clocks... I don't understand.
>>
> 
> Different platforms may have different number of clocks/resets or none.
> So I don't think minItems/maxItems should be specified.

Yeah, but we want the clocks to be specific per platform. Not anything
anywhere.

Best regards,
Krzysztof