Re: [RESEND v2 1/6] dt-bindings: power: Add JH7110 AON PMU support

Changhuang Liang
2023-04-25T07:58:09Z

>>>>>>
>>>>>> description: |
>>>>>> StarFive JH7110 SoC includes support for multiple power domains which can be
>>>>>> @@ -17,6 +18,7 @@ properties:
>>>>>> compatible:
>>>>>> enum:
>>>>>> - starfive,jh7110-pmu
>>>>>> + - starfive,jh7110-aon-pmu
>>>
>>> I was speaking to Rob about this over the weekend, he asked:
>>> 'Why isn't "starfive,jh7110-aon-syscon" just the power-domain provider
>>> itself?'
>>
>> Maybe not, this syscon only offset "0x00" configure power switch.
>> other offset configure other functions, maybe not power, so this
>> "starfive,jh7110-aon-syscon" not the power-domain itself.
>>
>>> Do we actually need to add a new binding for this at all?
>>>
>>> Cheers,
>>> Conor.
>>>
>>
>> Maybe this patch do that.
>> https://lore.kernel.org/all/20230414024157.53203-6-xingyu.wu@starfivetech.com/
>
> This makes it a child-node right? I think Rob already said no to that in
> and earlier revision of this series. What he meant the other day was
> making the syscon itself a power domain controller, since the child node
> has no meaningful properties (reg, interrupts etc).
>
> Cheers,
> Conor.

Yes, "starfive,jh7110-aon-pmu" is a child-node of "starfive,jh7110-aon-syscon".
In my opinion, "0x17010000" is "aon-syscon" on JH7110 SoC, and this "aon-pmu" is just
a part of "aon-syscon" function, so I think it is inappropriate to make "aon-syscon"
to a power domain controller. I think using the child-node description is closer to
JH7110 SoC.