arm64: dts: rockchip: Add Khadas edge2 board

Edge2 is an ultraslim, credit-card sized ARM PC designed by Khadas.

In this patch, we will add basic device tree support for this board,
Only eMMC, UART are enabled, so it's capable of booting into
a basic linux system from eMMC via serial console.

Signed-off-by: Yixun Lan <dlan@gentoo.org>
Link: https://lore.kernel.org/r/20230315033441.32719-3-dlan@gentoo.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index 99a44c400d6a8a58503bfb21fd23c981914a8669..1743e9e144263642307fee56fc84fbb3715f369a 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -90,4 +90,5 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-rock-3a.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-edgeble-neu6a-io.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-evb1-v10.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-rock-5b.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588s-khadas-edge2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588s-rock-5a.dtb

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
new file mode 100644 (file)
index 0000000..93b4a0c
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include "rk3588s.dtsi"
+
+/ {
+       model = "Khadas Edge2";
+       compatible = "khadas,edge2", "rockchip,rk3588s";
+
+       aliases {
+               mmc0 = &sdhci;
+               serial2 = &uart2;
+       };
+
+       chosen {
+               stdout-path = "serial2:1500000n8";
+       };
+};
+
+&sdhci {
+       bus-width = <8>;
+       no-sdio;
+       no-sd;
+       non-removable;
+       max-frequency = <200000000>;
+       mmc-hs400-1_8v;
+       mmc-hs400-enhanced-strobe;
+       status = "okay";
+};
+
+&uart2 {
+       pinctrl-0 = <&uart2m0_xfer>;
+       status = "okay";
+};