Antminer Software to control Powersupply voltage

[rmknet]

Hello,

I'am searchning for the documentation of a APW9 Powersupply of a Antminer S17pro.
I was searching inside the BraiinsOS software. But there is no module

Here is written, that there must be a module named "axi_iic_psu".
https://github.com/braiins/braiins/tree/bos-devel/open/hw/zynq-io-am1-s9
But I have not found that "axi_iic_psu".

I need to know (protocol description), how I can control the PSU output voltage manually (r.g. with external µ controller over I2C)

Maybe there is a sepaerate APW9 control docoument out there?
Hoch can i find the missing SW module or the description?

Many thanks for some help.
Maybe this question matches better in a differnt forum or section, please tell.

[tds-]

Maybe you can find something in this:

Antminer APW9
https://www.zeusbtc.com/manuals/Antminer-APW9-power-supply-repair-guide.asp

Antminer APW9+
https://www.zeusbtc.com/manuals/Antminer-APW9-plus-power-supply-repair-guide.asp