CALIBRATION_REG2
reg2_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG2);
CALIBRATION_REG2, reg2);
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2,
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2,