[PATCH v3 2/2] arm64: dts: socfpga: agilex: add SoCDK multi-QSPI board

[genevieve.chan@altera.com]

From: Genevieve Chan <genevieve.chan@altera.com>

Add a device tree for the Agilex SoCDK fitted with the multi-QSPI
daughter board. The daughter board replaces the single QSPI flash of
the default SoCDK with four Micron MT25QU02G flashes on chip selects
0-3, which allows the system to use up to 1 GiB of QSPI storage.

The board is otherwise identical to the SoCDK and builds on
socfpga_agilex.dtsi.

Signed-off-by: Genevieve Chan <genevieve.chan@altera.com>
---
Changes in v3:
- Reword subject to avoid repeating "Agilex".
- Move the DTS to arch/arm64/boot/dts/altera/, following the move of
  the SoCFPGA device trees in for-next.

Changes in v2:
- Rename file, compatible and model to drop the "agilex7f" prefix.
- Reword commit message to describe the hardware.

 arch/arm64/boot/dts/altera/Makefile           |   1 +
 .../altera/socfpga_agilex_socdk_multiqspi.dts | 213 ++++++++++++++++++
 2 files changed, 214 insertions(+)
 create mode 100644 arch/arm64/boot/dts/altera/socfpga_agilex_socdk_multiqspi.dts

diff --git a/arch/arm64/boot/dts/altera/Makefile b/arch/arm64/boot/dts/altera/Makefile
index 8f41349103b8..d38fe88a1cc8 100644
--- a/arch/arm64/boot/dts/altera/Makefile
+++ b/arch/arm64/boot/dts/altera/Makefile
@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga_agilex_n6000.dtb \
 				socfpga_agilex_socdk.dtb \
 				socfpga_agilex_socdk_emmc.dtb \
+				socfpga_agilex_socdk_multiqspi.dtb \
 				socfpga_agilex_socdk_nand.dtb \
 				socfpga_agilex3_socdk.dtb \
 				socfpga_agilex5_socdk.dtb \
diff --git a/arch/arm64/boot/dts/altera/socfpga_agilex_socdk_multiqspi.dts b/arch/arm64/boot/dts/altera/socfpga_agilex_socdk_multiqspi.dts
new file mode 100644
index 000000000000..0bf087fa7553
--- /dev/null
+++ b/arch/arm64/boot/dts/altera/socfpga_agilex_socdk_multiqspi.dts
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026, Intel Corporation
+ */
+#include "socfpga_agilex.dtsi"
+
+/ {
+	model = "SoCFPGA Agilex SoCDK multi-QSPI daughter board";
+	compatible = "intel,socfpga-agilex-socdk-multiqspi", "intel,socfpga-agilex";
+
+	aliases {
+		serial0 = &uart0;
+		ethernet0 = &gmac0;
+		ethernet1 = &gmac1;
+		ethernet2 = &gmac2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led0 {
+			label = "hps_led0";
+			gpios = <&portb 20 GPIO_ACTIVE_HIGH>;
+		};
+
+		led1 {
+			label = "hps_led1";
+			gpios = <&portb 19 GPIO_ACTIVE_HIGH>;
+		};
+
+		led2 {
+			label = "hps_led2";
+			gpios = <&portb 21 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		/* We expect the bootloader to fill in the reg */
+		reg = <0 0x80000000 0 0>;
+	};
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&gmac0 {
+	status = "okay";
+	/* PHY delays are configured via skew properties */
+	phy-mode = "rgmii";
+	phy-handle = <&phy0>;
+
+	max-frame-size = <9000>;
+
+	mdio0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+		phy0: ethernet-phy@4 {
+			reg = <4>;
+
+			txd0-skew-ps = <0>; /* -420ps */
+			txd1-skew-ps = <0>; /* -420ps */
+			txd2-skew-ps = <0>; /* -420ps */
+			txd3-skew-ps = <0>; /* -420ps */
+			rxd0-skew-ps = <420>; /* 0ps */
+			rxd1-skew-ps = <420>; /* 0ps */
+			rxd2-skew-ps = <420>; /* 0ps */
+			rxd3-skew-ps = <420>; /* 0ps */
+			txen-skew-ps = <0>; /* -420ps */
+			txc-skew-ps = <900>; /* 0ps */
+			rxdv-skew-ps = <420>; /* 0ps */
+			rxc-skew-ps = <1680>; /* 780ps */
+		};
+	};
+};
+
+&mmc {
+	status = "okay";
+	cap-sd-highspeed;
+	broken-cd;
+	bus-width = <4>;
+	clk-phase-sd-hs = <0>, <135>;
+};
+
+&osc1 {
+	clock-frequency = <25000000>;
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+	disable-over-current;
+};
+
+&watchdog0 {
+	status = "okay";
+};
+
+&qspi {
+	status = "okay";
+
+	flash@0 {
+		compatible = "micron,mt25qu02g", "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		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_boot0: partition@0 {
+				label = "Boot and fpga data";
+				reg = <0x0 0x10000000>;
+			};
+		};
+	};
+
+	flash@1 {
+		compatible = "micron,mt25qu02g", "jedec,spi-nor";
+		reg = <1>;
+		spi-max-frequency = <25000000>;
+
+		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_boot1: partition@0 {
+				label = "Boot and fpga data";
+				reg = <0x0 0x10000000>;
+			};
+		};
+	};
+
+	flash@2 {
+		compatible = "micron,mt25qu02g", "jedec,spi-nor";
+		reg = <2>;
+		spi-max-frequency = <25000000>;
+
+		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_boot2: partition@0 {
+				label = "Boot and fpga data";
+				reg = <0x0 0x10000000>;
+			};
+		};
+	};
+
+	flash@3 {
+		compatible = "micron,mt25qu02g", "jedec,spi-nor";
+		reg = <3>;
+		spi-max-frequency = <25000000>;
+
+		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_boot3: partition@0 {
+				label = "Boot and fpga data";
+				reg = <0x0 0x10000000>;
+			};
+		};
+	};
+};
-- 
2.43.7