Re: [PATCH v3 05/12] dt-bindings: phy: renesas,usb2-phy: Add renesas,sysc-signals

[Claudiu Beznea]

On 22.05.2025 15:48, Krzysztof Kozlowski wrote:
> On 22/05/2025 14:46, Krzysztof Kozlowski wrote:
>>>>>  
>>>>> +  - if:
>>>>> +      properties:
>>>>> +        compatible:
>>>>> +          contains:
>>>>> +            const: renesas,usb2-phy-r9a08g045
>>>>> +    then:
>>>>> +      required:
>>>>> +        - renesas,sysc-signals
>>>>
>>>> That's ABI break.
>>>
>>> There is no in kernel device tree users of "renesas,usb2-phy-r9a08g045"
>>> compatible. It is introduced in patch 11/12 from this series. With this do
>>> you still consider it ABI break?
>>
>> Then this patch cannot be split from binding introducing the user. Don't
>> add unused/undocumented compatibles.
>>
> Or you meant DTS?

Yes, I meant in tree DTS.

> I asked about ABI which is not about in-kernel users.
> You can always change in-kernel users, so what would be any point of a
> binding and its ABI?
> 
> Best regards,
> Krzysztof