[PATCH v2 4/4] ARM: dts: rockchip: Add Onion RV1103B Omega4

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <festevam@nabladev.com>

Onion Omega4 board is a board based on the RV1103B SoC that has:

 - 256 MB of RAM
 - 256 MB of SPI-NAND
 - Ethernet
 - USB OTG
 - Wifi
 - SD card
 - Camera connector

Add the initial support for this board so that it can fully boot into
Linux with the root file system stored in the SPI NAND.

Signed-off-by: Fabio Estevam <festevam@nabladev.com>
---
Changes since v1:
- Removed memory node.
- Added serial0 alias and used stdout-path = "serial0:115200n8";
- Added color, function and pinctrl entries to the LED node.
- Used bootph-pre-ram and bootph-some-ram.

 arch/arm/boot/dts/rockchip/Makefile           |   1 +
 arch/arm/boot/dts/rockchip/rv1103b-omega4.dts | 106 ++++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 arch/arm/boot/dts/rockchip/rv1103b-omega4.dts

diff --git a/arch/arm/boot/dts/rockchip/Makefile b/arch/arm/boot/dts/rockchip/Makefile
index 716f5540e438..d8cd5df138cc 100644
--- a/arch/arm/boot/dts/rockchip/Makefile
+++ b/arch/arm/boot/dts/rockchip/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_ROCKCHIP) += \
+	rv1103b-omega4.dtb \
 	rv1108-elgin-r1.dtb \
 	rv1108-evb.dtb \
 	rv1109-relfor-saib.dtb \
diff --git a/arch/arm/boot/dts/rockchip/rv1103b-omega4.dts b/arch/arm/boot/dts/rockchip/rv1103b-omega4.dts
new file mode 100644
index 000000000000..bcfc9b321dd6
--- /dev/null
+++ b/arch/arm/boot/dts/rockchip/rv1103b-omega4.dts
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
+ * Copyright (c) 2025 plan44.ch/luz
+ * Copyright (c) 2025 Onion Corporation
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+#include "rv1103b.dtsi"
+
+/ {
+	model = "Onion RV1103 Omega4 Board";
+	compatible = "onion,rv1103b-omega4", "rockchip,rv1103b";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0	{
+			pinctrl-names = "default";
+			pinctrl-0 = <&led_pin>;
+			gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_BLUE>;
+			label = "sys";
+			default-state = "on";
+		};
+	};
+};
+
+&fspi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "spi-nand";
+		reg = <0>;
+		bootph-pre-ram;
+		bootph-some-ram;
+		spi-max-frequency = <75000000>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "env";
+				reg = <0x00000000 0x00040000>;
+			};
+
+			partition@40000 {
+				label = "idblock";
+				reg = <0x00040000 0x00100000>;
+				read-only;
+			};
+
+			partition@140000 {
+				label = "uboot";
+				reg = <0x00140000 0x00100000>;
+				read-only;
+			};
+
+			partition@240000 {
+				label = "boot";
+				reg = <0x00240000 0x00800000>;
+			};
+
+			partition@a40000 {
+				label = "ubi";
+				reg = <0x00a40000 0x0f5c0000>;
+			};
+		};
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0m0_xfer_pins>;
+	bootph-all;
+	status = "okay";
+};
+
+&wdt {
+	bootph-all;
+	status = "okay";
+};
+
+&pinctrl {
+	leds {
+		led_pin: led-pin {
+			rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
-- 
2.34.1