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diff --git a/src/arm/intel/ixp/intel-ixp4xx-reference-design.dtsi b/src/arm/intel/ixp/intel-ixp4xx-reference-design.dtsi
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+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree include file for Intel reference designs for the
+ * XScale Network Processors in the IXP 4xx series. Common device
+ * set-up for IXDP425, IXCDP1100, KIXRP435 and IXDP465.
+ */
+
+/ {
+ memory@0 {
+ /*
+ * The board supports up to 256 MB of memory. Here we put in
+ * 64 MB and this may be modified by the boot loader.
+ */
+ device_type = "memory";
+ reg = <0x00000000 0x4000000>;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,115200n8";
+ stdout-path = "uart0:115200n8";
+ };
+
+ aliases {
+ serial0 = &uart0;
+ };
+
+ i2c {
+ compatible = "i2c-gpio";
+ sda-gpios = <&gpio0 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+ scl-gpios = <&gpio0 6 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eeprom@50 {
+ /*
+ * Philips PCF8582C-2T/03 512byte I2C EEPROM
+ * should behave like an Atmel 24c04.
+ */
+ compatible = "atmel,24c04";
+ reg = <0x50>;
+ pagesize = <16>;
+ size = <512>;
+ read-only;
+ };
+ };
+
+ soc {
+ bus@c4000000 {
+ /* Flash memory defined per-variant */
+ nand-controller@3,0 {
+ /* Some designs have a NAND on CS3 enable it here if present */
+ status = "disabled";
+
+ /*
+ * gen_nand needs to be extended and documented to get
+ * command byte = 1 and address byte = 2 from the device
+ * tree.
+ */
+ compatible = "gen_nand";
+
+ /* Expansion bus set-up */
+ intel,ixp4xx-eb-t1 = <0>;
+ intel,ixp4xx-eb-t2 = <0>;
+ intel,ixp4xx-eb-t3 = <1>; // 1 cycle extra strobe phase
+ intel,ixp4xx-eb-t4 = <0>;
+ intel,ixp4xx-eb-t5 = <0>;
+ intel,ixp4xx-eb-cycle-type = <0>; // Intel cycle type
+ intel,ixp4xx-eb-byte-access-on-halfword = <0>;
+ intel,ixp4xx-eb-mux-address-and-data = <0>;
+ intel,ixp4xx-eb-ahb-split-transfers = <0>;
+ intel,ixp4xx-eb-write-enable = <1>;
+ intel,ixp4xx-eb-byte-access = <1>;
+
+ /* 512 bytes memory window */
+ reg = <3 0x00000000 0x200>;
+ nand-on-flash-bbt;
+ nand-ecc-mode = "soft_bch";
+ nand-ecc-step-size = <512>;
+ nand-ecc-strength = <4>;
+ nce-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>; /* NCE */
+
+ label = "ixp400 NAND";
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ fs@0 {
+ label = "ixp400 NAND FS 0";
+ reg = <0x0 0x800000>;
+ };
+ fs@800000 {
+ label = "ixp400 NAND FS 1";
+ reg = <0x800000 0x0>;
+ };
+ };
+ };
+ };
+
+ pci@c0000000 {
+ status = "okay";
+
+ /*
+ * Taken from IXDP425 PCI boardfile.
+ * PCI slots on the BIXMB425BD base card.
+ * We have up to 4 slots (IDSEL) with 4 swizzled IRQs.
+ */
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0xf800 0 0 7>;
+ interrupt-map =
+ /* IDSEL 1 */
+ <0x0800 0 0 1 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 1 is irq 11 */
+ <0x0800 0 0 2 &gpio0 10 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 1 is irq 10 */
+ <0x0800 0 0 3 &gpio0 9 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 1 is irq 9 */
+ <0x0800 0 0 4 &gpio0 8 IRQ_TYPE_LEVEL_LOW>, /* INT D on slot 1 is irq 8 */
+ /* IDSEL 2 */
+ <0x1000 0 0 1 &gpio0 10 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 2 is irq 10 */
+ <0x1000 0 0 2 &gpio0 9 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 2 is irq 9 */
+ <0x1000 0 0 3 &gpio0 8 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 2 is irq 8 */
+ <0x1000 0 0 4 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT D on slot 2 is irq 11 */
+ /* IDSEL 3 */
+ <0x1800 0 0 1 &gpio0 9 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 3 is irq 9 */
+ <0x1800 0 0 2 &gpio0 8 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 3 is irq 8 */
+ <0x1800 0 0 3 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 3 is irq 11 */
+ <0x1800 0 0 4 &gpio0 10 IRQ_TYPE_LEVEL_LOW>, /* INT D on slot 3 is irq 10 */
+ /* IDSEL 4 */
+ <0x2000 0 0 1 &gpio0 8 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 4 is irq 8 */
+ <0x2000 0 0 2 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 4 is irq 11 */
+ <0x2000 0 0 3 &gpio0 10 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 4 is irq 10 */
+ <0x2000 0 0 4 &gpio0 9 IRQ_TYPE_LEVEL_LOW>; /* INT D on slot 4 is irq 9 */
+ };
+ };
+};