arm: dts: Stratix10: Add QSPI node

Merge qspi dts node from Linux.
Commit 0cb140d07fc75fb (arm64: dts: stratix10: Add QSPI support for Stratix10)

Add -u-boot.dtsi files for non Linux dts properties and
update properties for Uboot.
- add u-boot,dm-pre-reloc
- add alias for spi0
- change compatible for flash
- support quad read and quad write
- change maximum frequency to 100MHz

Tested on Stratix 10 SoC devkit.
SOCFPGA_STRATIX10 # sf probe 0:0
SF: Detected mt25qu02g with page size 256 Bytes, erase size 64 KiB, total 256 MiB

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>

arch/arm/dts/socfpga_stratix10.dtsi

@@ -237,6 +237,19 @@
 			reg = <0xffe00000 0x100000>;
 		};
 
+		qspi: spi@ff8d2000 {
+			compatible = "cdns,qspi-nor";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0xff8d2000 0x100>,
+			      <0xff900000 0x100000>;
+			interrupts = <0 3 4>;
+			cdns,fifo-depth = <128>;
+			cdns,fifo-width = <4>;
+			cdns,trigger-address = <0x00000000>;
+			status = "disabled";
+		};
+
 		rst: rstmgr@ffd11000 {
 			#reset-cells = <1>;
 			compatible = "altr,rst-mgr";

arch/arm/dts/socfpga_stratix10_socdk-u-boot.dtsi

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * U-Boot additions
+ *
+ * Copyright (C) 2019 Intel Corporation <www.intel.com>
+ */
+
+/{
+	aliases {
+		spi0 = &qspi;
+	};
+};
+
+&qspi {
+	status = "okay";
+	u-boot,dm-pre-reloc;
+};
+
+&flash0 {
+	compatible = "jedec,spi-nor";
+	spi-max-frequency = <100000000>;
+	spi-tx-bus-width = <4>;
+	spi-rx-bus-width = <4>;
+	u-boot,dm-pre-reloc;
+};

arch/arm/dts/socfpga_stratix10_socdk.dts

@@ -87,6 +87,41 @@
 	smplsel = <0>;
 };
 
+&qspi {
+	flash0: flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "n25q00a";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		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 0x4000000>;
+			};
+
+			qspi_rootfs: partition@4000000 {
+				label = "Root Filesystem - JFFS2";
+				reg = <0x4000000 0x4000000>;
+			};
+		};
+	};
+};
+
 &uart0 {
 	status = "okay";
 };