UCD9000_GPIO_CONFIG
return i2c_smbus_read_byte_data(client, UCD9000_GPIO_CONFIG);
ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret);
ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret);
ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config);
return i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config);