Re: [PATCH 4/4] arm64: dts: freescale: Add minimal support for S32N79

[Frank Li]

On Tue, Feb 24, 2026 at 12:15:33PM +0100, Ciprian Costea wrote:
> From: Ciprian Marian Costea <ciprianmarian.costea@xxxxxxxxxxx>
>
> 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@xxxxxxx>
> Signed-off-by: Larisa Grigore <larisa.grigore@xxxxxxx>
> Co-developed-by: Andra-Teodora Ilie <andra.ilie@xxxxxxx>
> Signed-off-by: Andra-Teodora Ilie <andra.ilie@xxxxxxx>
> Co-developed-by: Andrei Cherechesu <andrei.cherechesu@xxxxxxx>
> Signed-off-by: Andrei Cherechesu <andrei.cherechesu@xxxxxxx>
> Signed-off-by: Ciprian Marian Costea <ciprianmarian.costea@xxxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/freescale/Makefile       |   1 +
>  arch/arm64/boot/dts/freescale/s32n79-rdb.dts |  70 ++++
>  arch/arm64/boot/dts/freescale/s32n79.dtsi    | 361 +++++++++++++++++++

all new dts, run https://github.com/lznuaa/dt-format to keep consistent
node order

Frank
>  3 files changed, 432 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..c8b1dcefa2db
> --- /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"
> +
> +/ {
> +	model = "NXP S32N79-RDB";
> +	compatible = "nxp,s32n79-rdb", "nxp,s32n79";
> +
> +	aliases {
> +		serial0 = &uart0;
> +		serial1 = &uart5;
> +		serial2 = &uart6;
> +		serial3 = &uart7;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	memory@80000000 {
> +		device_type = "memory";
> +		reg = <0x00 0x80000000 0x00 0x80000000>,
> +			<0x88 0x00000000 0x03 0x40000000>,
> +			<0xc0 0x00000000 0x03 0x40000000>;
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		scmi_shbuf: shm@93000000 {
> +			compatible = "arm,scmi-shmem";
> +			reg = <0x0 0x93000000 0x0 0x80>;
> +			no-map;
> +		};
> +	};
> +};
> +
> +&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..ff4e004fcd7c
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/s32n79.dtsi
> @@ -0,0 +1,361 @@
> +// 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>;
> +
> +	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>;
> +				};
> +			};
> +		};
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x0>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_0>;
> +		};
> +
> +		cpu1: cpu@100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x100>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_0>;
> +		};
> +
> +		cpu2: cpu@10000 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x10000>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_1>;
> +		};
> +
> +		cpu3: cpu@10100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x10100>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_1>;
> +		};
> +
> +		cpu4: cpu@20000 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x20000>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_2>;
> +		};
> +
> +		cpu5: cpu@20100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x20100>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_2>;
> +		};
> +
> +		cpu6: cpu@30000 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x30000>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_3>;
> +		};
> +
> +		cpu7: cpu@30100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a78ae";
> +			reg = <0x30100>;
> +			enable-method = "psci";
> +			next-level-cache = <&l2_3>;
> +		};
> +
> +		l2_0: l2-cache0 {
> +			compatible = "cache";
> +			cache-level = <2>;
> +			cache-size = <524288>;
> +			cache-line-size = <64>;
> +			cache-sets = <512>;
> +			cache-unified;
> +			next-level-cache = <&l3_0>;
> +		};
> +
> +		l2_1: l2-cache1 {
> +			compatible = "cache";
> +			cache-level = <2>;
> +			cache-size = <524288>;
> +			cache-line-size = <64>;
> +			cache-sets = <512>;
> +			cache-unified;
> +			next-level-cache = <&l3_1>;
> +		};
> +
> +		l2_2: l2-cache2 {
> +			compatible = "cache";
> +			cache-level = <2>;
> +			cache-size = <524288>;
> +			cache-line-size = <64>;
> +			cache-sets = <512>;
> +			cache-unified;
> +			next-level-cache = <&l3_2>;
> +		};
> +
> +		l2_3: l2-cache3 {
> +			compatible = "cache";
> +			cache-level = <2>;
> +			cache-size = <524288>;
> +			cache-line-size = <64>;
> +			cache-sets = <512>;
> +			cache-unified;
> +			next-level-cache = <&l3_3>;
> +		};
> +
> +		l3_0: l3-cache0 {
> +			compatible = "cache";
> +			cache-level = <3>;
> +			cache-size = <1048576>;
> +			cache-line-size = <64>;
> +			cache-sets = <1024>;
> +			cache-unified;
> +		};
> +
> +		l3_1: l3-cache1 {
> +			compatible = "cache";
> +			cache-level = <3>;
> +			cache-size = <1048576>;
> +			cache-line-size = <64>;
> +			cache-sets = <1024>;
> +			cache-unified;
> +		};
> +
> +		l3_2: l3-cache2 {
> +			compatible = "cache";
> +			cache-level = <3>;
> +			cache-size = <1048576>;
> +			cache-line-size = <64>;
> +			cache-sets = <1024>;
> +			cache-unified;
> +		};
> +
> +		l3_3: l3-cache3 {
> +			compatible = "cache";
> +			cache-level = <3>;
> +			cache-size = <1048576>;
> +			cache-line-size = <64>;
> +			cache-sets = <1024>;
> +			cache-unified;
> +		};
> +	};
> +
> +	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>;
> +	};
> +
> +	firmware {
> +		scmi: scmi {
> +			compatible = "arm,scmi-smc";
> +			shmem = <&scmi_shbuf>;
> +			arm,smc-id = <0xc20000fe>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			status = "okay";
> +
> +			clks: protocol@14 {
> +				reg = <0x14>;
> +				#clock-cells = <1>;
> +			};
> +		};
> +
> +		psci {
> +			compatible = "arm,psci-1.0";
> +			method = "smc";
> +		};
> +	};
> +
> +	cis-bus {
> +		compatible = "simple-bus";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x4f200000 0x0 0x4f200000 0xc00000>;
> +
> +		gic: interrupt-controller@4f200000 {
> +			compatible = "arm,gic-v3";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			#interrupt-cells = <3>;
> +			interrupt-controller;
> +			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +			reg = <0x4f200000 0x10000>, /* GIC Dist */
> +			      <0x4f260000 0x100000>; /* GICR (RD_base + SGI_base) */
> +			ranges;
> +
> +			its: msi-controller@4f240000 {
> +				compatible = "arm,gic-v3-its";
> +				reg = <0x4f240000 0x20000>;
> +				msi-controller;
> +				#msi-cells = <1>;
> +			};
> +		};
> +
> +		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";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x4a000000 0x0 0x4a000000 0xff0000>,
> +			 <0x4e000000 0x0 0x4e000000 0x1000000>;
> +
> +		uart0: serial@4a030000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x4a030000 0x1000>;
> +			clocks = <&clks 0x9a>, <&clks 0x9a>;
> +			clock-names = "uartclk", "apb_pclk";
> +			interrupt-parent = <&irqsteer_coss>;
> +			interrupts = <264>;
> +			status = "disabled";
> +		};
> +
> +		uart5: serial@4a060000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x4a060000 0x1000>;
> +			clocks = <&clks 0x9a>, <&clks 0x9a>;
> +			clock-names = "uartclk", "apb_pclk";
> +			interrupt-parent = <&irqsteer_coss>;
> +			interrupts = <269>;
> +			status = "disabled";
> +		};
> +
> +		uart6: serial@4aa30000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x4aa30000 0x1000>;
> +			clocks = <&clks 0x9a>, <&clks 0x9a>;
> +			clock-names = "uartclk", "apb_pclk";
> +			interrupt-parent = <&irqsteer_coss>;
> +			interrupts = <270>;
> +			status = "disabled";
> +		};
> +
> +		uart7: serial@4aa40000 {
> +			compatible = "arm,pl011", "arm,primecell";
> +			reg = <0x4aa40000 0x1000>;
> +			clocks = <&clks 0x9a>, <&clks 0x9a>;
> +			clock-names = "uartclk", "apb_pclk";
> +			interrupt-parent = <&irqsteer_coss>;
> +			interrupts = <271>;
> +			status = "disabled";
> +		};
> +
> +		irqsteer_coss: interrupt-controller@4ed00000 {
> +			compatible = "nxp,s32n79-irqsteer";
> +			reg = <0x4ed00000 0x10000>;
> +			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>;
> +			interrupt-controller;
> +			interrupt-parent = <&gic>;
> +			#interrupt-cells = <1>;
> +			clocks = <&clks 0x9a>;
> +			clock-names = "ipg";
> +			fsl,channel = <0>;
> +			fsl,num-irqs = <512>;
> +			status = "disabled";
> +		};
> +	};
> +
> +	fss-bus {
> +		compatible = "simple-bus";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x5b490000 0x0 0x5b490000 0x1000>;
> +
> +		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";
> +		};
> +	};
> +};
> --
> 2.43.0
>