Maybe someone tried to use this RS485 CAN Hat on Asus tinkerboard 2S ?
HAT link: https://www.waveshare.com/wiki/RS485_CAN_HAT_(B)
It needs two overlays.
overlay=mcp2515-can0,oscillator=16000000,interrupt=25,,spimaxfrequency=1000000
overlay=sc16is752-spi1,int_pin=24
found one by default - mcp2515-can0
sc16is752 needs to be written.
Also CAN needs to activated in kernel.