drivers: flash: mchp: Introduce G1 Flash Driver

boards/microchip/sam/sam_e54_xpro/sam_e54_xpro.dts

@@ -18,6 +18,8 @@
 		zephyr,shell-uart = &sercom2;
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+		zephyr,flash-controller = &nvmctrl;
 	};
 
 	aliases {
@@ -40,14 +42,21 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 
-		/*
-		 * The final 16 KiB is reserved for the application.
-		 * Storage partition will be used by FCB/LittleFS/NVS
-		 * if enabled.
-		 */
-		storage_partition: partition@fc000 {
-			label = "storage";
-			reg = <0x000fc000 0x00004000>;
+		boot_partition: partition@0 {
+			reg = <0x00000000 0x00010000>;  /* 64 KB bootloader */
+			read-only;
+		};
+
+		slot0_partition: partition@10000 {
+			reg = <0x00010000 0x00070000>;  /* 448 KB primary app slot */
+		};
+
+		slot1_partition: partition@80000 {
+			reg = <0x00080000 0x00070000>;  /* 448 KB secondary app slot */
+		};
+
+		storage_partition: partition@f0000 {
+			reg = <0x000f0000 0x00010000>;  /* 64 KB storage area */
 		};
 	};
 };

boards/microchip/sam/sam_e54_xpro/sam_e54_xpro.yaml

@@ -10,6 +10,8 @@ toolchain:
 flash: 1024
 ram: 256
 supported:
+  - flash
+  - mcuboot
   - pinctrl
   - pwm
   - reset

drivers/flash/CMakeLists.txt

@@ -31,6 +31,7 @@ zephyr_library_sources_ifdef(CONFIG_FLASH_ANDES_QSPI_XIP flash_andes_qspi_xip.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_CAD_QSPI_NOR flash_cadence_qspi_nor.c flash_cadence_qspi_nor_ll.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_CDNS_NAND flash_cadence_nand.c flash_cadence_nand_ll.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_INFINEON_CAT1 flash_ifx_cat1.c)
+zephyr_library_sources_ifdef(CONFIG_FLASH_MCHP_NVMCTRL_G1 flash_mchp_nvmctrl_g1.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_MCUX_FLEXSPI_HYPERFLASH flash_mcux_flexspi_hyperflash.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_MCUX_FLEXSPI_MX25UM51345G flash_mcux_flexspi_mx25um51345g.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_MCUX_FLEXSPI_NOR flash_mcux_flexspi_nor.c)

drivers/flash/Kconfig

@@ -182,6 +182,7 @@ source "drivers/flash/Kconfig.it51xxx_m1k"
 source "drivers/flash/Kconfig.it8xxx2"
 source "drivers/flash/Kconfig.lpc"
 source "drivers/flash/Kconfig.max32"
+source "drivers/flash/Kconfig.mchp"
 source "drivers/flash/Kconfig.mcux"
 source "drivers/flash/Kconfig.mspi"
 source "drivers/flash/Kconfig.nor"

drivers/flash/Kconfig.mchp

@@ -0,0 +1,26 @@
+# Copyright (c) 2025 Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config FLASH_MCHP_NVMCTRL_G1
+	bool "Microchip G1 Flash Driver for NVMCTRL"
+	default y
+	depends on DT_HAS_MICROCHIP_NVMCTRL_G1_FLASH_ENABLED
+	select FLASH_HAS_PAGE_LAYOUT
+	select FLASH_HAS_EX_OP
+	select FLASH_EX_OP_ENABLED
+	select FLASH_HAS_DRIVER_ENABLED
+	select FLASH_HAS_EXPLICIT_ERASE
+	select MPU_ALLOW_FLASH_WRITE if ARM_MPU
+	help
+	  Enable Flash driver for Microchip Non Volatile Memory Controller.
+
+config FLASH_HAS_UNALIGNED_WRITE
+	bool "Provide unaligned write support"
+	depends on FLASH_MCHP_NVMCTRL_G1
+	help
+	  Enable this option to allow the Zephyr flash API to write data to flash
+	  memory at offsets that are not aligned to the device's write block size
+	  When enabled, the driver will handle unaligned writes internally, typically
+	  using read-modify-write operations to ensure data integrity. This allows
+	  applications to write data starting at any offset within the flash memory
+	  space, not just at aligned addresses.