ADC128_REG_CONFIG
if (i2c_smbus_read_byte_data(client, ADC128_REG_CONFIG) & 0xf4)
err = i2c_smbus_write_byte_data(client, ADC128_REG_CONFIG, 0x80);
err = i2c_smbus_write_byte_data(client, ADC128_REG_CONFIG, 0x01);