---
name: "dwiic"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/dwiic"
---

# dwiic(4)

Synopsys DesignWare I2C controller

## NAME

**dwiic** – Synopsys DesignWare I2C controller

## SYNOPSIS

**dwiic\* at acpi?** **dwiic\* at fdt?** **dwiic\* at pci?** **iic\* at dwiic?**

## DESCRIPTION

The **dwiic** driver supports the Synopsys DesignWare I2C controller for use with the [iic(4)](/iic/4.md) framework.

On systems using the Intel OnChip System Fabric, **dwiic** may need the [iosf(4)](/iosf/4.md) driver to coordinate access to the I2C bus.

## SEE ALSO

[acpi(4)](/acpi/4.md), [iic(4)](/iic/4.md), [iosf(4)](/iosf/4.md), [pci(4)](/pci/4.md)

## HISTORY

The **dwiic** device driver first appeared in OpenBSD 5.9.

## AUTHORS

The **dwiic** driver was written by joshua stein ⟨*jcs@openbsd.org*⟩.