Re: [PATCH v3 1/3] dt-bindings: arm: qcom: Add Talos Lyra EVK board

["Avaneesh Kumar Dwivedi (avani)" <avaneesh.dwivedi@oss.qualcomm.com>]

Re sending as earlier reply was rejected due to HTML formatting.

On 10/28/2026 12:11 AM, Krzysztof Kozlowski wrote:
> On Tue, Oct 27, 2026 at 05:01:55PM +0530, Ruchira Revdekar wrote:
>> From: Avaneesh Kumar Dwivedi <avaneesh.dwivedi@oss.qualcomm.com>
>>
>> Add the qcom,talos-lyra-evk compatible string for the Talos Lyra EVK
>> board. The Talos Lyra EVK pairs the Talos Lyra SoM with a carrier board.
>> The SoM uses the same QCS615/SM6150 SoC as the existing Talos EVK, so
>> qcom,talos-lyra-evk is grouped under the existing talos-evk block rather
>> than introducing a SoM-specific compatible.
> I do not understand this logic at all. Usage of same SoC has nothing to
> do with having or not having SoM compatible. Every SoM uses same
> compatible as some other device, so we should drop all SoM-compatibles
> in the future?.

Thank you Krzysztof for your review comments, and you are right. Sharing 
same soc (QCS615/SM6150) can not be the reason to omit a SoM compatible.

v3 commit was misleading suggesting that this was the reason for change, 
will fix it.

>
> So if you have a SoM then it can be used with different boards, thus it
> should have its own compatible.

In v1 patch, the EVK root compatible list also included Lyra SoM 
compatible. And as per earlier review comment that there is no value in 
EVK claiming compatibility with SoM, we removed SoM compatible from EVK 
compatible chain and added qcom, talos-lyra-evk directly to existing 
QCS615/SM6150 group.

If there is no value in EVK claiming compatibility with SoM, then is it 
fine that i do not have a fallback SoM compatible in Talos Lyra EVK root 
compatible list while I retain qcom, talos-lyra-som compatible for SoM 
itself?

>
> Again, explain properly the hardware if this is the chosen design.

H/w toplogy wise Lyra is reusable SoM containing SoC and module specific 
components. The Talos Lyra EVK consist of this Talos Lyra SoM plugged 
into Talos Lyra carrier board. But The Talos Lyra SoM can be used 
independently with different carrier board.

We will take care of above things in new patch.

>
> Best regards,
> Krzysztof