Currently eMMC storage attached to a Pi 4 is running in single data rate mode only. However the controller used supports dual data rate modes. This patch enables ddr modes for mmc storage. I've verified that there are no issues transferring data in ddr mode using multiple eMMC modules from different vendors. Additionally I've checked signal integrity on the data lines at the micro SD card slot and did not find any issues there either. This is v2 of this patch. The sd-uhs-ddr50 property present in the initial version of the patch is not required and was removed. Changelog: v2: Remove sd-uhs-ddr50 property Tobias Schramm (1): ARM: dts: bcm2711: Enable ddr modes on emmc2 controller arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 1 + 1 file changed, 1 insertion(+) -- 2.28.0
