DS1621_REG_CONF
new_conf = conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
i2c_smbus_write_byte_data(client, DS1621_REG_CONF, new_conf);
data->conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
i2c_smbus_write_byte_data(client, DS1621_REG_CONF,
data->conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
i2c_smbus_write_byte_data(client, DS1621_REG_CONF, data->conf);