From: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com>

Add device tree support for the NXP S32N79 Reference Design Board
(RDB) [1].

The S32N79-RDB enables the following peripherals:
- PL011 UART controllers (uart0, uart5, uart6, uart7)
- uSDHC controller
- IRQ steering controller

The board has 32GB of DRAM memory with 28GB usable and 4GB reserved
for ECC logic.

[1] https://www.nxp.com/products/processors-and-microcontrollers/s32-automotive-platform/s32n-vehicle-super-integration-processors:S32N

Co-developed-by: Larisa Grigore <larisa.grigore@nxp.com>
Signed-off-by: Larisa Grigore <larisa.grigore@nxp.com>
Co-developed-by: Andra-Teodora Ilie <andra.ilie@nxp.com>
Signed-off-by: Andra-Teodora Ilie <andra.ilie@nxp.com>
Signed-off-by: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com>
---
 arch/arm64/boot/dts/freescale/Makefile       |  1 +
 arch/arm64/boot/dts/freescale/s32n79-rdb.dts | 70 ++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/s32n79-rdb.dts

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 700bab4d3e60..e79807bf1820 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -501,4 +501,5 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-phygate-tauri-l-rs232-rs485.dtb
 dtb-$(CONFIG_ARCH_S32) += s32g274a-evb.dtb
 dtb-$(CONFIG_ARCH_S32) += s32g274a-rdb2.dtb
 dtb-$(CONFIG_ARCH_S32) += s32g399a-rdb3.dtb
+dtb-$(CONFIG_ARCH_S32) += s32n79-rdb.dtb
 dtb-$(CONFIG_ARCH_S32) += s32v234-evb.dtb
diff --git a/arch/arm64/boot/dts/freescale/s32n79-rdb.dts b/arch/arm64/boot/dts/freescale/s32n79-rdb.dts
new file mode 100644
index 000000000000..1feccd61258e
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/s32n79-rdb.dts
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2026 NXP
+ *
+ * NXP S32N79 Reference Design Board (S32N79-RDB)
+ */
+
+/dts-v1/;
+#include "s32n79.dtsi"
+
+/ {
+	compatible = "nxp,s32n79-rdb", "nxp,s32n79";
+	model = "NXP S32N79-RDB";
+
+	aliases {
+		serial0 = &uart0;
+		serial1 = &uart5;
+		serial2 = &uart6;
+		serial3 = &uart7;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	reserved-memory {
+		ranges;
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		scmi_shbuf: memory@93000000 {
+			compatible = "arm,scmi-shmem";
+			reg = <0x0 0x93000000 0x0 0x80>;
+			no-map;
+		};
+	};
+
+	memory@80000000 {
+		reg = <0x00 0x80000000 0x00 0x80000000>,
+			<0x88 0x00000000 0x03 0x40000000>,
+			<0xc0 0x00000000 0x03 0x40000000>;
+		device_type = "memory";
+	};
+};
+
+&irqsteer_coss {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart5 {
+	status = "okay";
+};
+
+&uart6 {
+	status = "okay";
+};
+
+&uart7 {
+	status = "okay";
+};
+
+&usdhc0 {
+	disable-wp;
+	no-sdio;
+	status = "okay";
+};
-- 
2.43.0