[S] Change in coreboot[master]: mb/google/rex: Set FVM configuration for MTL-P 28W

[Subrata Banik (Code Review)]

Attention is currently required from: Eric Herrmann, Jakub Czapiga, Kapil Porwal, Tarun Tuli.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75764?usp=email )

Change subject: mb/google/rex: Set FVM configuration for MTL-P 28W
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Patch Set 1:

(2 comments)

File src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb:

https://review.coreboot.org/c/coreboot/+/75764/comment/2f8599d3_2f4d7ddc :
PS1, Line 60: register "cep_enable[VR_DOMAIN_IA]" = "1"
> what is cep enable?

Current Excursion Protection

https://review.coreboot.org/c/coreboot/+/75764/comment/08d649da_68746fab :
PS1, Line 61: register "fast_vmode_i_trip[VR_DOMAIN_IA]" = "372" # 93A
> I think these are out of date. The document I have is 91A, 54A, and 27A respectively.
>
> Does this get programmed into the PMIC via SVID or is it kept internally?

via mailbox to pcode

Since these are nominal values, does this value assume some tolerance?

I was referring to the baseline value.