U-Boot > i2c dev < busnumber >
U-Boot > i2c probe

example

U-Boot > i2c dev 0
U-Boot > i2c probe

root@MBaXXX:~ i2cdetect <busnumber>

example

root@MBaXXX:~ i2cdetect 1

on

• TQMa7x
• TQMa335x

U-Boot > i2c dev 0
U-Boot > i2c md 0x50 0x00.2 0x100

• TQMa28

TQMa28 U-Boot > i2c dev 1
TQMa28 U-Boot > i2c md 0x50 0x00.2 0x100

• TQMa6ULx

U-Boot > i2c dev 3
U-Boot > i2c md 0x50 0x00.2 0x100

• TQMa6x
  • TQMa6x Rev.01xx / TQMa6x Rev.02xx Variant B / TQMa6x Rev.03xx

    U-Boot > i2c dev 2
    U-Boot > i2c md 0x50 0x00.2 0x100

  • TQMa6x Rev.02xx Variant A & C

    U-Boot > i2c dev 0
    U-Boot > i2c md 0x50 0x00.2 0x100

• TQMLS102xA
  • TQMLS102xA Rev. ≤ 0202

    U-Boot > i2c dev 0
    U-Boot > i2c md 0x50 0x00.2 0x100

  • TQMLS102xA Rev. ≥ 0203

    U-Boot > i2c dev 0
    U-Boot > i2c md 0x54 0x00.2 0x100

You can see in offset 20 the mac-address, in offset 30 the serial number and in offset 40 the TQ short.