SC16IS7xx for spi interface

modulename: sc16is7xx_spi.ko

and/or

configname: CONFIG_SERIAL_SC16IS7XX_SPI

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>SC16IS7xx for spi interface
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Enable SC16IS7xx driver on SPI bus,
If required say y, and say n to spi if not required,
This is additional support to existing driver.
You must select at least one bus for the driver to be built.