boards: st: stm32h7s3l8 nucleo board supporting xspi instance

Add the XSPI 2 which is an octoSPI connection to a octo NOR flash
MX25UW25645GXDI00 (256 Mbits, 1.8 V, 200 MHz, DTR, rww)
on the nucleo_h7s3l8 board.
Use the STM32Cube programmer to flash with the corresponding
external loader for XiP mode.

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

boards/st/nucleo_h7s3l8/board.cmake

@@ -1,7 +1,12 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # keep first
+if(CONFIG_STM32_MEMMAP)
 board_runner_args(stm32cubeprogrammer "--port=swd" "--reset-mode=hw")
+board_runner_args(stm32cubeprogrammer "--extload=MX25UW25645G_NUCLEO-H7S3L8.stldr")
+else()
+board_runner_args(stm32cubeprogrammer "--port=swd" "--reset-mode=hw" )
+endif()
 
 board_runner_args(openocd --target-handle=_CHIPNAME.cpu0)
 

boards/st/nucleo_h7s3l8/nucleo_h7s3l8.dts

@@ -20,6 +20,7 @@
 		zephyr,dtcm = &dtcm;
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
+		zephyr,flash-controller = &mx25uw25645;
 	};
 
 	leds: leds {
@@ -53,6 +54,7 @@
 		led2 = &red_led;
 		sw0 = &user_button;
 		watchdog0 = &iwdg;
+		spi-flash0 = &mx25uw25645;
 	};
 };
 
@@ -85,6 +87,19 @@
 	status = "okay";
 };
 
+/* PLL2 for clocking the xspi peripheral */
+&pll2 {
+	div-m = <12>;
+	mul-n = <200>;
+	div-p = <2>;
+	div-q = <2>;
+	div-r = <2>;
+	div-s = <2>;
+	div-t = <2>;
+	clocks = <&clk_hse>;
+	status = "okay";
+};
+
 &rcc {
 	clocks = <&pll>;
 	clock-frequency = <DT_FREQ_M(200)>;
@@ -139,3 +154,61 @@
 	status = "okay";
 	clock-frequency = <I2C_BITRATE_FAST>;
 };
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* Set the partitions with first MB to make use of the whole Bank1 */
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x00000000 DT_SIZE_K(64)>;
+		};
+	};
+};
+
+&xspi2 {
+	pinctrl-0 = <&xspim_p2_clk_pn6 &xspim_p2_ncs1_pn1
+		     &xspim_p2_io0_pn2 &xspim_p2_io1_pn3
+		     &xspim_p2_io2_pn4 &xspim_p2_io3_pn5
+		     &xspim_p2_io4_pn8 &xspim_p2_io5_pn9
+		     &xspim_p2_io6_pn10 &xspim_p2_io7_pn11
+		     &xspim_p2_dqs0_pn0>;
+	pinctrl-names = "default";
+
+	status = "okay";
+
+	mx25uw25645: xspi-nor-flash@70000000 {
+		compatible = "st,stm32-xspi-nor";
+		reg = <0x70000000 DT_SIZE_M(32)>; /* 256Mbits */
+		ospi-max-frequency = <DT_FREQ_M(50)>;
+		spi-bus-width = <XSPI_OCTO_MODE>;
+		data-rate = <XSPI_DTR_TRANSFER>;
+		status = "okay";
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			slot0_partition: partition@0 {
+				label = "image-0";
+				reg = <0x00000000 DT_SIZE_K(512)>;
+			};
+			slot1_partition: partition@80000 {
+				label = "image-1";
+				reg = <0x0080000 DT_SIZE_K(512)>;
+			};
+			scratch_partition: partition@100000 {
+				label = "image-scratch";
+				reg = <0x00100000 DT_SIZE_K(64)>;
+			};
+			storage_partition: partition@110000 {
+				label = "storage";
+				reg = <0x00110000 DT_SIZE_K(64)>;
+			};
+		};
+	};
+};

boards/st/nucleo_h7s3l8/nucleo_h7s3l8.yaml

@@ -12,4 +12,5 @@ supported:
   - watchdog
   - entropy
   - adc
+  - octospi
 vendor: st