U-Boot > i2c dev < busnumber > U-Boot > i2c probe
example
U-Boot > i2c dev 0 U-Boot > i2c probe
i2c md 0x50 0x20.2 read MAC adress i2c md 0x50 0x30.2 read serial number
root@MBaXXX:~ i2cdetect <busnumber>
root@MBaXXX:~ i2cdetect 1