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.

AUTHORS

The ig4 driver was written for DragonFly 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>.