ADT7462_REG_CFG2
reg = i2c_smbus_read_byte_data(client, ADT7462_REG_CFG2);
i2c_smbus_write_byte_data(client, ADT7462_REG_CFG2, reg);
data->cfg2 = i2c_smbus_read_byte_data(client, ADT7462_REG_CFG2);