boot: zephyr: xspi1 for RWW on external NOR of stm32h7s78 disco kit

Define the overlay for the stm32h7s78 disco kit xpsi peripheral

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

Author: FRASTM

boot/zephyr/boards/stm32h7s78_dk.overlay

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2024 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
+};
+
+&xspi1 {
+	/* same pining as 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";
+
+	mx66uw1g45: xspi-nor-flash@72000000 {
+		compatible = "st,stm32-xspi-nor";
+		reg = <0x72000000 DT_SIZE_M(96)>; /* bank1 - 3*/
+		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>;
+			/* bank1 */
+			slot1_partition: partition@0000000 {
+				label = "image-1";
+				reg = <0x0000000 DT_SIZE_K(416)>;
+			};
+			/* bank2 */
+			scratch_partition: partition@2000000 {
+				label = "image-scratch";
+				reg = <0x2000000 DT_SIZE_M(32)>;
+			};
+			/* bank3 */
+			storage_partition: partition@4000000 {
+				label = "storage";
+				reg = <0x4000000 DT_SIZE_M(32)>;
+			};
+		};
+	};
+};
+