NAME¶

ig4 — Synopsys DesignWare I2C Controller

SYNOPSIS¶

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

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>.