NAME

       iic_gpiomux — driver for I2C mux hardware controlled via GPIO

SYNOPSIS

       To compile this driver into the kernel, place the following line in your kernel configuration file:

             device iic_gpiomux

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             iic_gpiomux_load="YES"

DESCRIPTION

       The  iic_gpiomux  driver  supports  any  type of I2C bus multiplexer (mux) hardware that is controlled by
       manipulating the state of one or more GPIO pins.  It automatically connects an upstream I2C bus to one of
       the downstream buses as needed when slave devices on the downstream buses initiate I/O.  More information
       on the automatic switching behavior is available in iicmux(4).

FDT CONFIGURATION

       On an fdt(4) based system, an iic_gpiomux device node may be defined as a child node of any arbitrary bus
       in the FDT data.  The i2c-parent property indicates the connection to the upstream I2C bus.  The children
       of the iic_gpiomux node are additional i2c buses, which will have their own i2c slave  devices  described
       in their child nodes.

       The iic_gpiomux driver conforms to the standard i2c/i2c-mux-gpio.txt bindings document.

SEE ALSO

       iicbus(4), iicmux(4),

HISTORY

       The iic_gpiomux driver first appeared in FreeBSD 13.0.

Debian                                           January 1, 2020                                  IIC_GPIOMUX(4)