Re: [PATCH v3 1/4] dt-bindings: phy: motorola,cpcap-usb: add chrg_det interrupt

[Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>]

On 7.07.26 г. 12:58 ч., Conor.Dooley@microchip.com wrote:
> On 06/07/2026 22:25, Ivaylo Dimitrov wrote:
>>
>> Hi,
>>
>> On 6.07.26 г. 20:14 ч., Conor Dooley wrote:
>>> On Sun, Jul 05, 2026 at 01:11:02PM +0300, Ivaylo Dimitrov wrote:
>>>> The CPCAP USB PHY driver uses the CPCAP charger detection interrupt
>>>> for DCP detection.
>>>
>>> This is not currently true, the driver does not look for this interrupt
>>> at the time of this patch.
>>>
>>
>> Right, this is bad wording caused by the fact that initially the driver
>> patch came before the binding patch.
>>
>>>> Update the binding and example DTS to use the corresponding
>>>> "chrg_det" interrupt name.
>>>
>>> Sounds to me like this new interrupt is optional, since until now it has
>>> not been needed? The patch however makes it mandatory. I think your
>>> driver patch also makes it mandatory, which will break older
>>> devicetrees.
>>>
>>
>> Oh, it is indeed not needed for proper DCP/SDP detection, after some
>> experiments I was able to teach the driver to do proper detection by
>> using current interrupts only.
>>
>>> What makes this ABI break okay?
>>>
>>
>> Will send new series with schema/DT patches dropped.
> 
> I think the devicetree patches are fine, provided you add
> a minItems of N-1 so that the new interrupt is optional.
> Dropping them would mean that the documentation for this device
> remains incomplete since that interrupt does exist.
> 

Ok, will add that change in the next version, however, I will still
change the driver patch to not use chrg_det interrupt.

Thanks and Regards,
Ivo

> Cheers,
> Conor.
>