On Mon, Feb 26, 2024 at 04:47:53PM +0100, Mizsei Zolt??n wrote: > Hi, > > on NetBSD the following is used to support the eMMC modules on RK356x. Would > it possible to implement asomething similar for OpenBSD? > > https://github.com/NetBSD/src/commit/f30b89bb4385f5fe218ff86be5d458a51fc62d4c > > For more info see the original commit message below: > > "acpi: sdhc: Add support for RK356x eMMC controller. > RK356x has a DesignWare eMMC controller that is somewhat SDHCI compliant, > with one major problem -- the clock divisor doesn't actually work. To > change the clock card on Rockchip SoCs, the clock frequency needs to be > adjusted in the Clock & Reset Unit (CRU) directly. > > The RK356x UEFI implementation introduces a DSM that allows drivers to > request firmware assistance in setting the card clock rate, for instances > like this where the divisor is broken.
RK356x is not a viable platform for use with ACPI. I'd recommend to switch to a Linux-mainline device tree and use a current U-Boot, if possible.
