DWMMC(4) | Device Drivers Manual | DWMMC(4)

# NAME

`dwmmc` — Synopsys DesignWare MMC/SD/SDIO controller

# SYNOPSIS

`dwmmc* at fdt?`
`sdmmc* at dwmmc?`

# DESCRIPTION

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.

# SEE ALSO

intro(4), sdmmc(4)

# HISTORY

OpenBSD support for `dwmmc` first appeared in OpenBSD 6.2.

# AUTHORS

The `dwmmc` driver was written by Mark Kettenis <kettenis@openbsd.org>.

April 4, 2023 | Debian