Re: [PATCH v3 1/5] dt-bindings: arm: qcom: Document Shikra and its EVK boards

[Komal Bajaj]

On 5/26/2026 9:15 PM, Krzysztof Kozlowski wrote:
> On Fri, May 22, 2026 at 11:32:24PM +0530, Komal Bajaj wrote:
> > Shikra is a Qualcomm IoT SoC available in a System-on-Module (SoM)
> > form factor. The SoM integrates the Shikra SoC, PMICs, and essential
> > passives, and is designed to be mounted on carrier boards.
> >
> > Three eSoM variant are introduced:
> >    - CQM: retail variant with integrated modem
> >    - CQS: retail variant without modem
> >    - IQS: industrial-grade variant without modem
> Industrial/consumer variants differ often only with thermal, so how is
> it here? Thermal difference does not make them incompatible. Honestly,
> usually industrial one does not even receive dedicated compatibles.

The IQS variant uses a PM8150 PMIC, while CQS/CQM use PM4125 + PM8005. 
These have different regulator topologies and RPM regulator bindings, 
making the DTBs genuinely incompatible, IQS SoM cannot boot with CQS 
DTB. Thus, a separate compatible is required and not merely a thermal 
distinction.

Thanks
Komal

> Best regards,
> Krzysztof