dwmmc(4)

dwmmc4

Synopsys designware mmc/sd/sdio controller

Usage

dwmmc* at fdt? sdmmc* at dwmmc?

Overview

The dwmmc driver provides support for various MMC/SD/SDIO controllers based on the Synopsys DesignWare SD/eMMC core. These controllers are typically found on SoCs, such as the Rockchip RK3288/RK3399 and Samsung Exynos ARM SoCs.

The sdmmc(4) subsystem performs SD/MMC transactions to communicate with whatever MMC/SD/SDIO devices are inserted into the card slot or directly connected to the controller.

Releases

20 releases since OpenBSD 6.2; the text changed 1 time.

  1. 6.2–7.3
  2. 7.4–8.0

History

OpenBSD support for dwmmc first appeared in OpenBSD 6.2.

Authors

The dwmmc driver was written by Mark Kettenis ⟨[email protected]⟩.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.