arm64: dts: ls1028a: Add FlexSPI support

Add fspi node property for LS1028A SoC for FlexSPI driver.
Property added for FlexSPI controller and for the connected
slave device for the LS1028ARDB and LS1028AQDS target.
RDB and QDS are having one SPI-NOR flash device, mt35xu02g
connected at CS0.
This flash device "mt35xu02g" is tested for octal read
Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts

@@ -123,6 +123,21 @@ &esdhc1 {
 	status = "okay";
 };
 
+&fspi {
+	status = "okay";
+
+	mt35xu02g0: flash@0 {
+		compatible = "jedec,spi-nor";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		spi-max-frequency = <50000000>;
+		/* The following setting enables 1-1-8 (CMD-ADDR-DATA) mode */
+		spi-rx-bus-width = <8>; /* 8 SPI Rx lines */
+		spi-tx-bus-width = <1>; /* 1 SPI Tx line */
+		reg = <0>;
+	};
+};
+
 &i2c0 {
 	status = "okay";
 

arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts

@@ -96,6 +96,21 @@ &esdhc1 {
 	status = "okay";
 };
 
+&fspi {
+	status = "okay";
+
+	mt35xu02g0: flash@0 {
+		compatible = "jedec,spi-nor";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		spi-max-frequency = <50000000>;
+		/* The following setting enables 1-1-8 (CMD-ADDR-DATA) mode */
+		spi-rx-bus-width = <8>; /* 8 SPI Rx lines */
+		spi-tx-bus-width = <1>; /* 1 SPI Tx line */
+		reg = <0>;
+	};
+};
+
 &i2c0 {
 	status = "okay";
 

arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi

@@ -271,6 +271,19 @@ i2c7: i2c@2070000 {
 			status = "disabled";
 		};
 
+		fspi: spi@20c0000 {
+			compatible = "nxp,lx2160a-fspi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0 0x20c0000 0x0 0x10000>,
+			      <0x0 0x20000000 0x0 0x10000000>;
+			reg-names = "fspi_base", "fspi_mmap";
+			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clockgen 4 3>, <&clockgen 4 3>;
+			clock-names = "fspi_en", "fspi";
+			status = "disabled";
+		};
+
 		esdhc: mmc@2140000 {
 			compatible = "fsl,ls1028a-esdhc", "fsl,esdhc";
 			reg = <0x0 0x2140000 0x0 0x10000>;