Thanks, now it's working...a very stupid error
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sorry
the image is here
https://pasteboard.co/jWPZW0AcYNLf.jpg

i have already modified rv1103g-luckfox-pico-mini-a.dts with okay on gmac

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i have connected my board with the ethernet cable like this

modified the kernel but no eth0 in buildroot
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what means the phrase "if they have upgraded the hardware themselves" "Users of the Luckfox Pico and Luckfox Mini series development boards, if they have upgraded the hardware themselves to support Ethernet functionality, they also need to manually configure the device tree to enable ...

It's possible, soldering the pins to an RJ45 cable, to use the ethernet on Pico Mini A?
I don't see eth0 interface
thanks
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