arm64: dts: agilex: add QSPI support for Intel Agilex

This patch adds QSPI flash interface in device tree for Intel Agilex
Signed-off-by: Ooi, Joyce <joyce.ooi@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/intel/socfpga_agilex_socdk.dts

@@ -73,3 +73,38 @@ &uart0 {
 &watchdog0 {
 	status = "okay";
 };
+
+&qspi {
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "mt25qu02g";
+		reg = <0>;
+		spi-max-frequency = <100000000>;
+
+		m25p,fast-read;
+		cdns,page-size = <256>;
+		cdns,block-size = <16>;
+		cdns,read-delay = <1>;
+		cdns,tshsl-ns = <50>;
+		cdns,tsd2d-ns = <50>;
+		cdns,tchsh-ns = <4>;
+		cdns,tslch-ns = <4>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			qspi_boot: partition@0 {
+				label = "Boot and fpga data";
+				reg = <0x0 0x034B0000>;
+			};
+
+			qspi_rootfs: partition@34B0000 {
+				label = "Root Filesystem - JFFS2";
+				reg = <0x034B0000 0x0EB50000>;
+			};
+		};
+	};
+};