i.MX93 RMII debug tips

In i.MX93 EVK, it use RGMII in ethernet connection. Some customer use RMII connection. This article describe RMII HW design and SW config. It listed four cases in attached.

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Hello, I am using the FEC of imx8mp, and I hope to configure it as RMII. I have configured the device tree according to the instructions, but there are some mistakes, I modified it myself, but I don't know if it is correct, but when I checked the register, I still did not configure it as RMII, hope you can help me，thank you!!

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