SC16IS7xx for I2C interface

configname: CONFIG_SERIAL_SC16IS7XX_I2C

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>SC16IS7xx for I2C interface
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Enable SC16IS7xx driver on I2C bus,
If required say y, and say n to i2c if not required,
Enabled by default to support oldconfig.
You must select at least one bus for the driver to be built.