eth0/eth1 interfaces don't work

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From the information, the PHY device, RTL8211F-CG, is not recognized.
You need to rule out hardware problems, whether the power supply, reset, and clock of the RTL8211F-CG are normal.
This will provide some help. https://gitlab.com/firefly-linux ... firefly/Common/GMAC

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valeriy.simakov Posted at 3/25/2022 15:23
Оther four custom boards have an another error with DMA:

[   10.334142] rk_gmac-dwmac fe010000.e ...

That's usually a problem with the operating clock.