boards: arduino: portenta_h7: Add support for external QSPI Flash.

Enabled the QuadSPI node and necessary pin muxing to enable interfacing
with the external flash chip on the Portenta H7 board. The jedec data was
validated with the samples/drivers/jesd216 project to extract the
JEDEC data.
Additionally added `flash` to the list of ignored tags as the flash driver
should not be built on the M4 CPU domain.

Signed-off-by: Rahul Arasikere <[email protected]>

Author: rahul-arasikere

boards/arduino/portenta_h7/arduino_portenta_h7-common.dtsi

@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <mem.h>
+
 / {
 	leds {
 		compatible = "gpio-leds";
@@ -166,3 +168,43 @@ zephyr_udc0: &usbotg_fs {
 		};
 	};
 };
+
+&quadspi {
+	pinctrl-0 = < &quadspi_bk1_io0_pd11
+			&quadspi_bk1_io1_pd12
+			&quadspi_bk1_io2_pf7
+			&quadspi_bk1_io3_pd13
+			&quadspi_bk1_ncs_pg6
+			&quadspi_clk_pf10 >;
+	pinctrl-names = "default";
+	status = "okay";
+
+	mx25l12833f: qspi-nor-flash@90000000 {
+		compatible = "st,stm32-qspi-nor";
+		reg = < 0x90000000 DT_SIZE_M(16) >; /* 128 MBits */
+		qspi-max-frequency = < 40000000 >;
+		sfdp-bfp = [ e5 20 f1 ff  ff ff ff 07  44 eb 08 6b  08 3b 04 bb
+			     fe ff ff ff  ff ff 00 ff  ff ff 44 eb  0c 20 0f 52
+			     10 d8 00 ff  82 41 bd 00  81 e5 7b c6  44 03 67 38
+			     30 b0 30 b0  f7 bd d5 5c  4a be 29 ff  e1 d0 ff ff ];
+		jedec-id = [ 66 66 20 ];
+		spi-bus-width = <4>;
+		status = "okay";
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = < 1 >;
+			#size-cells = < 1 >;
+
+			storage_partition: partition@0 {
+				label = "storage";
+				reg=< 0x0 DT_SIZE_K(15872) >;
+			};
+
+			wifi_firmware: partition@f80000 {
+				label = "wifi-firmware";
+				reg = < 0xf80000 DT_SIZE_K(512) >;
+			};
+		};
+	};
+};

boards/arduino/portenta_h7/arduino_portenta_h7_stm32h747xx_m4.yaml

@@ -14,4 +14,5 @@ testing:
   ignore_tags:
     - mpu
     - nfc
+    - flash
 vendor: arduino

boards/arduino/portenta_h7/arduino_portenta_h7_stm32h747xx_m7.dts

@@ -19,7 +19,7 @@
 		zephyr,shell-uart = &usart1;
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
-		zephyr,code-partition = &code_partition;
+		zephyr,code-partition = &slot0_partition;
 	};
 
 	oscen: oscen {
@@ -91,27 +91,31 @@
 		#size-cells = <1>;
 
 		boot_partition: partition@0 {
-			label = "bootloader";
-			reg = <0x0 0x00040000>;
+			label = "mcuboot";
+			reg = <0x00000000 0x00010000>;
 			read-only;
 		};
-
-		code_partition: partition@40000 {
-			label = "code";
-			reg = <0x40000 0x000c0000>;
-			read-only;
-		};
-
 		/*
-		 * The flash starting at 0x000f8000 and ending at
-		 * 0x000fffff is reserved for use by the application.
-		 *
-		 * Storage partition will be used by FCB/LittleFS/NVS
-		 * if enabled.
+		 * The flash starting at 0x00010000 and ending at
+		 * 0x0001ffff (sectors 16-31) is reserved for use
+		 * by the application.
 		 */
-		storage_partition: partition@f8000 {
-			label = "storage";
-			reg = <0x000f8000 0x00008000>;
+		scratch_partition: partition@10000 {
+			label = "image-scratch";
+			reg = <0x00010000 0x00030000>;
+		};
+		/* The arduino default bootloader occupies the address space 0x0 - 0x40000.
+		 * This way regardless of the user's choice to use the mcuboot bootloader,
+		 * applications will be located at 0x40000 which will be loaded by the
+		 * arduino bootloader.
+		 */
+		slot0_partition: partition@40000 {
+			label = "image-0";
+			reg = <0x00040000 0x00060000>;
+		};
+		slot1_partition: partition@A0000 {
+			label = "image-1";
+			reg = <0x000A0000 0x00060000>;
 		};
 	};
 };