NAME

     ig4 — Synopsys DesignWare I2C Controller

SYNOPSIS

     To compile this driver into the kernel, place the following lines into the kernel
     configuration file:

           device ig4
           device iicbus

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

           ig4_load="YES"

DESCRIPTION

     The ig4 driver provides access to peripherals attached to an I2C controller.

HARDWARE

     ig4 supports the I2C controllers based on Synopsys DesignWare IP that can be found in
     Intel(R) Core(TM) processors starting from the fourth generation, Intel(R) Bay Trail, Apollo
     Lake SoC families, and some AMD systems.

SYSCTL VARIABLES

     These sysctl(8) variables are available:

     debug.ig4_dump  This sysctl is a zero-based bit mask.  When any of the bits are set, a
                     register dump is printed for every I2C transfer on an ig4 device with the
                     same unit number.

SEE ALSO

     iic(4), iicbus(4)

AUTHORS

     The ig4 driver was written for DragonFly BSD by Matthew Dillon and subsequently ported to
     FreeBSD by Michael Gmelin <freebsd@grem.de>.

     This manual page was written by Michael Gmelin <freebsd@grem.de>.