IO Domain Voltages

#1

When compiling the Android 11 Kernel for the Rock CM3 I am asked to provide the voltages for certain IO Domains (PMUIO2, VCCIO1, and VCCIO3 to 7). Unfortunately I cannot find them anywhere in the documentation.

I followed the instructions on how to build the Kernel on https://wiki.radxa.com/Rock3/Android11

What values should I choose?
I tried to guess them from the schematics which resulted in the compiling failing. From the error message I found a working combination but I don’t want to risk frying my module.

#2

@liuxian please give a guide about this on wiki or document and paste link here @Sven23

#3

Configure according to the definition in the actual dts used.
arch/arm64/boot/dts/rockchip/rk3566-rock-compute-module-3.dtsi
&pmu_io_domains {
status = “okay”;
pmuio1-supply = <&vcc3v3_pmu>;
pmuio2-supply = <&vcc_3v3>;
vccio1-supply = <&vccio_acodec>;----->3.3
vccio2-supply = <&vcc_1v8>;
vccio3-supply = <&vccio_sd>;----->3.3
vccio4-supply = <&vcc_1v8>;
vccio5-supply = <&vcc_3v3>;
vccio6-supply = <&vcc_3v3>;
vccio7-supply = <&vcc_3v3>;
};

#4

Thanks a lot, liuxian!