---
name: "octmmc"
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/octmmc"
---

# octmmc(4)

OCTEON MMC host controller

## NAME

**octmmc** – OCTEON MMC host controller

## SYNOPSIS

**octmmc\* at fdt?** **sdmmc\* at octmmc?**

## DESCRIPTION

The **octmmc** driver provides support for the OCTEON MMC host controller, which provides an interface to the [sdmmc(4)](/sdmmc/4.md) bus.

## SEE ALSO

[sdmmc(4)](/sdmmc/4.md)

## HISTORY

The **octmmc** driver first appeared in OpenBSD 6.1.

## BUGS

SDIO interrupts are not supported.