CALIBRATION_REG1
reg1_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG1);
CALIBRATION_REG1, reg1);
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1,
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1,