Verdin iMX8M Plus PHY to PHY

Good Afternoon,

I am beginning the design of a carrier board for the Verdin iMX8M Plus.

I am required to connect a USB to Ethernet Bridge (ASIX AX88772C) to the Verdin iMX8M Plus’ ethernet, which would be a PHY to PHY connection on the board.

Assuming this would even work, are there any examples of something similar being done?

Thanks! Kind Regards,

We did something similar, and it took a long time to figure out. Our use was an RGMII connection to another device similar to an ethernet switch.

We make our own build with YOCTO, and make a custom device tree based off the default verdin one.
We modified the device tree similar to the following:

&fec {
/delete-property/ phy-handle;
status = “okay”;

    fixed-link {
            speed = <1000>;
    mdio {
            #address-cells = <1>;
            #size-cells = <0>;

            /delete-node/  ethernet-phy@7;


Hello forstnert,

can you be a bit more specific? do you want to connect PHY to PHY and the PHY to USB is on a diffrent boar?
Do you have a little diagram?

Best Regards,


Thanks for your replies. Hopefully the attached diagram makes my query a little clearer! It is a bit of an awkward configuration. Unfortunately I cannot use the RMII as the RMII pin’s primary function is required.

block diagram

Hello forstnert,

why not connect the customer Device to USB directly?

Best Regards,


Hi matthias,

That would certainly be much easier! For some reason the powers that be are insistent that the above configuration is what they want.