LTC LTC4306/5 I2C multiplexer

modulename: i2c-mux-ltc4306.ko

configname: CONFIG_I2C_MUX_LTC4306

Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>Multiplexer I2C Chip support
└─>LTC LTC4306/5 I2C multiplexer
In linux kernel since version 4.2 (release Date: 2015-08-30)  
If you say yes here you get support for the Analog Devices
LTC4306 or LTC4305 I2C mux/switch devices.

This driver can also be built as a module. If so, the module
will be called i2c-mux-ltc4306.

source code: