Re: [PATCH V3 2/7] PM / OPP: Introduce "domain-performance-state" binding to OPP nodes

[Ulf Hansson]

[...]

>>                                     ---> Parent domain-2 (Contains Perfomance states)
>>                                     |
>>                                     |
>> C.) DeviceX  --->  Parent-domain-1  |
>>                                     |
>>                                     |
>>                                     ---> Parent domain-3 (Contains Perfomance states)
>
> I'm a bit confused. How does a domain have 2 parent domains?

This comes from the early design of the generic PM domain, thus I
assume we have some HW with such complex PM topology. However, I don't
know if it is actually being used.

Moreover, the corresponding DT bindings for "power-domains" parents,
can easily be extended to cover more than one parent. See more in
Documentation/devicetree/bindings/power/power_domain.txt

[...]

Kind regards
Uffe