[PATCH v2 7/7] arm64: dts: freescale: Add minimal support for S32N79

[Ciprian Costea <ciprianmarian.costea@oss.nxp.com>]

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

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

The S32N79 features eight Arm Cortex-A78AE cores organized in four
dual-core clusters, with a three-level cache hierarchy (L1/L2 per core,
L3 per dual-core cluster) and 32GB of DRAM memory. It includes an SMMUv3
for IOMMU functionality.

On S32N79 SoC, peripherals are organized into subsystems, such as:
- CIS (Coherent Interconnect Subsystem).
- COSS (Connectivity Subsystem)
- FSS (Foundation Subsystem)

This initial support includes basic peripherals:
- GICv3, SMMUv3 from CIS Subsystem
- PL011 UARTs and IRQ steering controller from COSS Subsystem
- uSDHC from FSS Subsystem

Clock and Pin multiplexing settings for the chip are managed over SCMI.

[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>
Co-developed-by: Andrei Cherechesu <andrei.cherechesu@nxp.com>
Signed-off-by: Andrei Cherechesu <andrei.cherechesu@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 ++++
 arch/arm64/boot/dts/freescale/s32n79.dtsi    | 362 +++++++++++++++++++
 3 files changed, 433 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/s32n79-rdb.dts
 create mode 100644 arch/arm64/boot/dts/freescale/s32n79.dtsi

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..d13eb3a0666b
--- /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: shm@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";
+};
diff --git a/arch/arm64/boot/dts/freescale/s32n79.dtsi b/arch/arm64/boot/dts/freescale/s32n79.dtsi
new file mode 100644
index 000000000000..94ab58783fdc
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/s32n79.dtsi
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * NXP S32N79 SoC
+ *
+ * Copyright 2026 NXP
+ */
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cis-bus {
+		compatible = "simple-bus";
+		ranges = <0x4f200000 0x0 0x4f200000 0xc00000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		gic: interrupt-controller@4f200000 {
+			compatible = "arm,gic-v3";
+			reg = <0x4f200000 0x10000>, /* GIC Dist */
+			      <0x4f260000 0x100000>;
+			#interrupt-cells = <3>;
+			interrupt-controller;
+			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			/* GICR (RD_base + SGI_base) */
+			ranges;
+
+			its: msi-controller@4f240000 {
+				compatible = "arm,gic-v3-its";
+				reg = <0x4f240000 0x20000>;
+				#msi-cells = <1>;
+				msi-controller;
+			};
+		};
+
+		smmu: iommu@4fc00000 {
+			compatible = "arm,smmu-v3";
+			reg = <0x4fc00000 0x200000>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 1 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 8 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 2 IRQ_TYPE_EDGE_RISING>;
+			interrupt-names = "eventq", "gerror", "priq", "cmdq-sync";
+			#iommu-cells = <1>;
+			dma-coherent;
+			status = "disabled";
+		};
+	};
+
+	coss-bus {
+		compatible = "simple-bus";
+		ranges = <0x4a000000 0x0 0x4a000000 0xff0000>,
+			 <0x4e000000 0x0 0x4e000000 0x1000000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		uart0: serial@4a030000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x4a030000 0x1000>;
+			interrupt-parent = <&irqsteer_coss>;
+			interrupts = <264>;
+			clocks = <&clks 0x9a>, <&clks 0x9a>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		uart5: serial@4a060000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x4a060000 0x1000>;
+			interrupt-parent = <&irqsteer_coss>;
+			interrupts = <269>;
+			clocks = <&clks 0x9a>, <&clks 0x9a>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		uart6: serial@4aa30000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x4aa30000 0x1000>;
+			interrupt-parent = <&irqsteer_coss>;
+			interrupts = <270>;
+			clocks = <&clks 0x9a>, <&clks 0x9a>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		uart7: serial@4aa40000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x4aa40000 0x1000>;
+			interrupt-parent = <&irqsteer_coss>;
+			interrupts = <271>;
+			clocks = <&clks 0x9a>, <&clks 0x9a>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		irqsteer_coss: interrupt-controller@4ed00000 {
+			compatible = "nxp,s32n79-irqsteer";
+			reg = <0x4ed00000 0x10000>;
+			#interrupt-cells = <1>;
+			interrupt-controller;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 527 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 528 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 529 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 530 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 531 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 532 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 533 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 534 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clks 0x9a>;
+			clock-names = "ipg";
+			fsl,channel = <0>;
+			fsl,num-irqs = <512>;
+			status = "disabled";
+		};
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu-map {
+			cluster0 {
+				core0 {
+					cpu = <&cpu0>;
+				};
+
+				core1 {
+					cpu = <&cpu1>;
+				};
+			};
+
+			cluster1 {
+				core0 {
+					cpu = <&cpu2>;
+				};
+
+				core1 {
+					cpu = <&cpu3>;
+				};
+			};
+
+			cluster2 {
+				core0 {
+					cpu = <&cpu4>;
+				};
+
+				core1 {
+					cpu = <&cpu5>;
+				};
+			};
+
+			cluster3 {
+				core0 {
+					cpu = <&cpu6>;
+				};
+
+				core1 {
+					cpu = <&cpu7>;
+				};
+			};
+		};
+
+		l2_0: l2-cache0 {
+			compatible = "cache";
+			cache-level = <2>;
+			cache-line-size = <64>;
+			cache-sets = <512>;
+			cache-size = <524288>;
+			cache-unified;
+			next-level-cache = <&l3_0>;
+		};
+
+		l2_1: l2-cache1 {
+			compatible = "cache";
+			cache-level = <2>;
+			cache-line-size = <64>;
+			cache-sets = <512>;
+			cache-size = <524288>;
+			cache-unified;
+			next-level-cache = <&l3_1>;
+		};
+
+		l2_2: l2-cache2 {
+			compatible = "cache";
+			cache-level = <2>;
+			cache-line-size = <64>;
+			cache-sets = <512>;
+			cache-size = <524288>;
+			cache-unified;
+			next-level-cache = <&l3_2>;
+		};
+
+		l2_3: l2-cache3 {
+			compatible = "cache";
+			cache-level = <2>;
+			cache-line-size = <64>;
+			cache-sets = <512>;
+			cache-size = <524288>;
+			cache-unified;
+			next-level-cache = <&l3_3>;
+		};
+
+		l3_0: l3-cache0 {
+			compatible = "cache";
+			cache-level = <3>;
+			cache-line-size = <64>;
+			cache-sets = <1024>;
+			cache-size = <1048576>;
+			cache-unified;
+		};
+
+		l3_1: l3-cache1 {
+			compatible = "cache";
+			cache-level = <3>;
+			cache-line-size = <64>;
+			cache-sets = <1024>;
+			cache-size = <1048576>;
+			cache-unified;
+		};
+
+		l3_2: l3-cache2 {
+			compatible = "cache";
+			cache-level = <3>;
+			cache-line-size = <64>;
+			cache-sets = <1024>;
+			cache-size = <1048576>;
+			cache-unified;
+		};
+
+		l3_3: l3-cache3 {
+			compatible = "cache";
+			cache-level = <3>;
+			cache-line-size = <64>;
+			cache-sets = <1024>;
+			cache-size = <1048576>;
+			cache-unified;
+		};
+
+		cpu0: cpu@0 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x0>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_0>;
+		};
+
+		cpu1: cpu@100 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x100>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_0>;
+		};
+
+		cpu2: cpu@10000 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x10000>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_1>;
+		};
+
+		cpu3: cpu@10100 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x10100>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_1>;
+		};
+
+		cpu4: cpu@20000 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x20000>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_2>;
+		};
+
+		cpu5: cpu@20100 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x20100>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_2>;
+		};
+
+		cpu6: cpu@30000 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x30000>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_3>;
+		};
+
+		cpu7: cpu@30100 {
+			compatible = "arm,cortex-a78ae";
+			reg = <0x30100>;
+			device_type = "cpu";
+			enable-method = "psci";
+			next-level-cache = <&l2_3>;
+		};
+	};
+
+	firmware {
+		psci {
+			compatible = "arm,psci-1.0";
+			method = "smc";
+		};
+
+		scmi: scmi {
+			compatible = "arm,scmi-smc";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			shmem = <&scmi_shbuf>;
+			arm,smc-id = <0xc20000fe>;
+			status = "okay";
+
+			clks: protocol@14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+		};
+	};
+
+	fss-bus {
+		compatible = "simple-bus";
+		ranges = <0x5b490000 0x0 0x5b490000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		usdhc0: mmc@5b490000 {
+			compatible = "nxp,s32n79-usdhc";
+			reg = <0x5b490000 0x1000>;
+			interrupts = <GIC_SPI 472 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clks 0x58>, <&clks 0x50>, <&clks 0x5f>;
+			clock-names = "ipg", "ahb", "per";
+			bus-width = <8>;
+			status = "disabled";
+		};
+	};
+
+	pmu: pmu {
+		compatible = "arm,armv8-pmuv3";
+		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	timer: timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
+	};
+};
-- 
2.43.0