The Radxa E20C may come with an onboard eMMC (8GB / 16GB / 32GB / 64GB). This series add dt-binding and SoC DT node for the SDHCI controller and enable use of the SDCHI controller on the Radxa E20C. This series add support for the onboard eMMC on Radxa E20C. Driver changes to use different delay and tap num is needed to be able to support HS400 modes, something for a future series. With this HS200 mode should work: mmc0: SDHCI controller on ffbf0000.mmc [ffbf0000.mmc] using ADMA mmc0: new HS200 MMC card at address 0001 mmcblk0: mmc0:0001 TLi16G 14.7 GiB mmcblk0: p1 p2 p3 mmcblk0boot0: mmc0:0001 TLi16G 4.00 MiB mmcblk0boot1: mmc0:0001 TLi16G 4.00 MiB mmcblk0rpmb: mmc0:0001 TLi16G 4.00 MiB, chardev (499:0) ~ # cat /sys/kernel/debug/mmc0/ios clock: 200000000 Hz actual clock: 198000000 Hz vdd: 21 (3.3 ~ 3.4V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 3 (8bits) timing spec: 9 (mmc HS200) signal voltage: 1 (1.80 V) driver type: 0 (driver type B) ~ # hdparm -t /dev/mmcblk0p1 /dev/mmcblk0p1: Timing buffered disk reads: 64 MB in 0.37 seconds = 173154 kB/s This series depends on v2 of the "Support SD/SDIO controllers on RK3528" series for a clean apply. Jonas Karlman (3): dt-bindings: mmc: sdhci-of-dwcmhsc: Add compatible string for RK3528 arm64: dts: rockchip: Add SDHCI controller for RK3528 arm64: dts: rockchip: Enable onboard eMMC on Radxa E20C .../bindings/mmc/snps,dwcmshc-sdhci.yaml | 4 +++- .../boot/dts/rockchip/rk3528-radxa-e20c.dts | 12 ++++++++++ arch/arm64/boot/dts/rockchip/rk3528.dtsi | 24 +++++++++++++++++++ 3 files changed, 39 insertions(+), 1 deletion(-) -- 2.48.1
