Subject: Re: [PATCH v3 0/6] firmware: arm_scmi: Add SCMI v3.2 pincontrol
protocol basic support

On Mon, Jan 29, 2024 at 1:37 PM Peng Fan [off-list ref] wrote:

quoted

And for i.MX95 OEM extenstion, do you have any suggestions?
I have two points:
1. use vendor compatible. This would also benefit when supporting
vendor protocol.
2. Introduce a property saying supporting-generic-pinconf

How do you think?

While I don't know how OEM extensions to SCMI were designed, the pin
control subsystem has the philosophy that extensions are for minor fringe
stuff, such as a pin config option that no other silicon is using and thus have
no use for anyone else. Well that is actually all the custom extensions we
have.
(This notion is even carried over to SCMI pinctrl.)

The i.MX95 OEM extension is really odd to me, it looks like a
reimplementation of the core aspects of SCMI pin control, and looks much
more like the old i.MX drivers than like the SCMI driver.

i.MX SCMI pin protocol conf settings follows non-SCMI pin conf settings.

But I sure cannot speak of what is allowed in SCMI OEM extensions or not.

+ SPEC owner, Souvik. Any comments?

Thanks,
Peng.

Yours,
Linus Walleij

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