board: rockchip: Add Radxa E20C
The Radxa E20C is an ultra-compact network computer with a RK3528A SoC
that offers a wide range of networking capabilities.
Features tested on a Radxa E20C v1.104:
- SD-card boot
- eMMC boot
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3528-radxa-e20c-u-boot.dtsi b/arch/arm/dts/rk3528-radxa-e20c-u-boot.dtsi
new file mode 100644
index 0000000..9c2f03a
--- /dev/null
+++ b/arch/arm/dts/rk3528-radxa-e20c-u-boot.dtsi
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk3528-u-boot.dtsi"
+
+&sdmmc {
+ bus-width = <4>;
+ cap-mmc-highspeed;
+ cap-sd-highspeed;
+ disable-wp;
+ vmmc-supply = <&vcc_3v3>;
+ status = "okay";
+};