If you say yes to this option, support will be included for a
GPIO based I2C multiplexer. This driver provides access to
I2C busses connected through a MUX, which is controlled
through GPIO pins.

This driver can also be built as a module.  If so, the module
will be called gpio-i2cmux.

If you say yes here you get support for the NXP PCA9541
I2C Master Selector.

This driver can also be built as a module.  If so, the module
will be called pca9541.

If you say yes here you get support for the Philips PCA954x
I2C mux/switch devices.

This driver can also be built as a module.  If so, the module
will be called pca954x.