Building an embedded Linux system for an A20-based board using Buildroot

@Middleware & OS
I'm building an embedded Linux system for an A20-based board using Buildroot. The system boots successfully from an SD card. I've included all available CAN drivers and protocols (can, can_raw, and vcan). However, I'm encountering an issue:

The command
ip link add dev vcan0 type vcan
works perfectly, creating a virtual CAN interface (vcan0).
But, when I try to create a physical CAN interface with
ip link add dev can0 type can
, I get an error message: "RTNETLINK answers: Operation not supported."
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