def METHOD_NAME(self):
    """
    Returns the device revision
    """
    (is_valid, results) = self.get_tlv_field(
                self.eeprom_data, self._TLV_CODE_DEVICE_VERSION)
    if not is_valid:
        return "N/A"
    return (binascii.b2a_hex(results[2])).decode('ascii')