Re: [PATCH v3 09/27] dt-bindings: clock: mediatek: Describe MT8196 clock controllers

[Krzysztof Kozlowski <krzk@kernel.org>]

On 04/08/2025 16:15, AngeloGioacchino Del Regno wrote:
> Il 04/08/25 15:58, Krzysztof Kozlowski ha scritto:
>> On 04/08/2025 15:27, AngeloGioacchino Del Regno wrote:
>>>
>>> We discussed about aggregating votes, yes, in software - this instead is a
>>> *broken* hardware that does the aggregation internally and does not require
>>> nor want external drivers to do the aggregation.
>>>
>>>> Maybe it is just the name, so avoid all the confusing "votes" if this is
>>>> not voting system. If this is a voting system, then don't use custom
>>>> phandles.
>>>
>>> Being it fundamentally *broken*, this being a voting system is what the hardware
>>> initially wanted to be - but effectively, since it requires YOU to:
>>>    - Make sure that power supplies are turned on, if not, turn them on by "touching"
>>>      HW registers (so, without any assistance from the voter MCU), if any;
>>>    - Turn on parent clocks manually, if any, before using the "voter mcu" to try
>>>      to ungate that clock; and
>>>      - Enable the "FENC" manually, after the mcu says that the clock was ungated.
>>
>>
>> I understand that "YOU" as Linux driver, when you want to do something
>> (e.g. toggle) a clock?
> 
> "you" == Linux driver, yes.
> 
>> If so this looks a lot like power domain, although with some differences.
>>
> 
> A power domain ungates power to something.

Does more, it is not a simple supply.

> 
> These are clocks, giving a (x) (M)Hz signal to something.

Your earlier message about "YOU" said:

"   - Make sure that power supplies are turned on, if not, turn them on
by "touching"
     HW registers (so, without any assistance from the voter MCU), if any;"

so not a simple clocks stuff.

Best regards,
Krzysztof