[PATCH v2 2/2] riscv: dts: spacemit: Add OrangePi RV2 board device tree

[Hendrik Hamerlinck]

Add initial device tree support for the OrangePi RV2 board [1], which is
marketed as using the Ky X1 SoC but has been confirmed to be 
identical to the SpacemiT K1 [2].

The device tree is adapted from the OrangePi vendor tree [3], and similar
integration can be found in the Banana Pi kernel tree [4], confirming SoC
compatibility.

This minimal device tree enables booting into a serial console with UART
output and a blinking LED.

Link: http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-RV2.html [1]
Link: https://www.spacemit.com/en/key-stone-k1 [2]
Link: https://github.com/BPI-SINOVOIP/pi-linux/blob/linux-6.6.63-k1/arch/riscv/boot/dts/spacemit/k1-x_orangepi-rv2.dts [3]
Link: https://github.com/orangepi-xunlong/linux-orangepi/tree/orange-pi-6.6-ky [4]
Signed-off-by: Hendrik Hamerlinck <hendrik.hamerlinck at hammernet.be>
---
Changes since v1:
- Added the aliases section to the device tree.
- Removed the memory section, as it is populated by the bootloader.
- Replaced unclear copyright similar to the other K1-based boards.
---
 arch/riscv/boot/dts/spacemit/Makefile         |  1 +
 .../boot/dts/spacemit/k1-orangepi-rv2.dts     | 40 +++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts

diff --git a/arch/riscv/boot/dts/spacemit/Makefile b/arch/riscv/boot/dts/spacemit/Makefile
index 92e13ce1c16d..152832644870 100644
--- a/arch/riscv/boot/dts/spacemit/Makefile
+++ b/arch/riscv/boot/dts/spacemit/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-bananapi-f3.dtb
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-milkv-jupiter.dtb
+dtb-$(CONFIG_ARCH_SPACEMIT) += k1-orangepi-rv2.dtb
diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
new file mode 100644
index 000000000000..337240ebb7b7
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy at cyyself.name>
+ * Copyright (C) 2025 Hendrik Hamerlinck <hendrik.hamerlinck at hammernet.be>
+ */
+
+/dts-v1/;
+
+#include "k1.dtsi"
+#include "k1-pinctrl.dtsi"
+
+/ {
+	model = "OrangePi RV2";
+	compatible = "xunlong,orangepi-rv2", "spacemit,k1";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led1 {
+			label = "sys-led";
+			gpios = <&gpio K1_GPIO(96) GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "heartbeat";
+			default-state = "on";
+		};
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_2_cfg>;
+	status = "okay";
+};
-- 
2.43.0