From: Niravkumar L Rabara <niravkumarlaxmidas.rabara@altera.com>

Agilex3 SoCFPGA development kit is a small form factor board similar to
Agilex5 013b board.
Agilex3 SoCFPGA is derived from Agilex5 SoCFPGA, with the main difference
of CPU cores — Agilex3 has 2 cores compared to 4 in Agilex5.

Signed-off-by: Niravkumar L Rabara <niravkumarlaxmidas.rabara@altera.com>
---

v2 changes:
 - Use separate dtsi file for agilex3 instead of using agilex5 dtsi.

v1 link:
https://lore.kernel.org/all/aa19e005a2aa2aab63c8fe8cbaee7f59c416690f.1762756191.git.niravkumarlaxmidas.rabara@altera.com/

 arch/arm64/boot/dts/intel/Makefile            |   1 +
 .../arm64/boot/dts/intel/socfpga_agilex3.dtsi |  17 +++
 .../boot/dts/intel/socfpga_agilex3_socdk.dts  | 126 ++++++++++++++++++
 3 files changed, 144 insertions(+)
 create mode 100644 arch/arm64/boot/dts/intel/socfpga_agilex3.dtsi
 create mode 100644 arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts

diff --git a/arch/arm64/boot/dts/intel/Makefile b/arch/arm64/boot/dts/intel/Makefile
index 391d5cbe50b3..a117268267ee 100644
--- a/arch/arm64/boot/dts/intel/Makefile
+++ b/arch/arm64/boot/dts/intel/Makefile
@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga_agilex_n6000.dtb \
 				socfpga_agilex_socdk.dtb \
 				socfpga_agilex_socdk_nand.dtb \
+				socfpga_agilex3_socdk.dtb \
 				socfpga_agilex5_socdk.dtb \
 				socfpga_agilex5_socdk_013b.dtb \
 				socfpga_agilex5_socdk_nand.dtb \
diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex3.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex3.dtsi
new file mode 100644
index 000000000000..4e55513d93c4
--- /dev/null
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex3.dtsi
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2025, Altera Corporation
+ */
+
+/dts-v1/;
+#include "socfpga_agilex5.dtsi"
+
+/ {
+	compatible = "intel,socfpga-agilex3", "intel,socfpga-agilex5";
+};
+
+/* Agilex3 has only 2 CPUs */
+&{/cpus} {
+	/delete-node/ cpu@2;
+	/delete-node/ cpu@3;
+};
diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts b/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts
new file mode 100644
index 000000000000..fe353972fbae
--- /dev/null
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2025, Altera Corporation
+ */
+#include "socfpga_agilex3.dtsi"
+
+/ {
+	model = "SoCFPGA Agilex3 SoCDK";
+	compatible = "intel,socfpga-agilex3-socdk", "intel,socfpga-agilex3";
+
+	aliases {
+		serial0 = &uart0;
+		ethernet2 = &gmac2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led0 {
+			label = "hps_led0";
+			gpios = <&porta 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		led1 {
+			label = "hps_led1";
+			gpios = <&porta 12 GPIO_ACTIVE_HIGH>;
+		};
+
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		/* We expect the bootloader to fill in the reg */
+		reg = <0x0 0x80000000 0x0 0x0>;
+	};
+};
+
+&gmac2 {
+	status = "okay";
+	phy-mode = "rgmii-id";
+	phy-handle = <&emac2_phy0>;
+	max-frame-size = <9000>;
+
+	mdio0 {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		emac2_phy0: ethernet-phy@0 {
+			reg = <0>;
+			rxc-skew-ps = <0>;
+			rxdv-skew-ps = <0>;
+			rxd0-skew-ps = <0>;
+			rxd1-skew-ps = <0>;
+			rxd2-skew-ps = <0>;
+			rxd3-skew-ps = <0>;
+			txc-skew-ps = <0>;
+			txen-skew-ps = <60>;
+			txd0-skew-ps = <60>;
+			txd1-skew-ps = <60>;
+			txd2-skew-ps = <60>;
+			txd3-skew-ps = <60>;
+		};
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&osc1 {
+	clock-frequency = <25000000>;
+};
+
+&qspi {
+	status = "okay";
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <100000000>;
+		m25p,fast-read;
+		cdns,read-delay = <2>;
+		cdns,tshsl-ns = <50>;
+		cdns,tsd2d-ns = <50>;
+		cdns,tchsh-ns = <4>;
+		cdns,tslch-ns = <4>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			qspi_boot: partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x00600000>;
+			};
+
+			root: partition@4200000 {
+				label = "root";
+				reg = <0x00600000 0x03a00000>;
+			};
+		};
+	};
+};
+
+&smmu {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&watchdog0 {
+	status = "okay";
+};
-- 
2.25.1