drivers: mspi: stm32 mspi driver entity for stm32 XSPI controller

Introduce a stm32 MSPI controller driver based on the xspi peripheral
of stm32 mcus. A new CONFIG_MSPI_STM32 is defined for this.
Supports SPI/OPI and STR (DTR mode is not supported yet).

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

Author: FRASTM

drivers/mspi/CMakeLists.txt

@@ -8,3 +8,4 @@ zephyr_library_sources_ifdef(CONFIG_MSPI_AMBIQ_AP5   mspi_ambiq_ap5.c)
 zephyr_library_sources_ifdef(CONFIG_MSPI_AMBIQ_TIMING_SCAN mspi_ambiq_timing_scan.c)
 zephyr_library_sources_ifdef(CONFIG_MSPI_DW          mspi_dw.c)
 zephyr_library_sources_ifdef(CONFIG_MSPI_EMUL        mspi_emul.c)
+zephyr_library_sources_ifdef(CONFIG_MSPI_STM32       mspi_stm32.c)

drivers/mspi/Kconfig

@@ -62,5 +62,6 @@ source "subsys/logging/Kconfig.template.log_config"
 source "drivers/mspi/Kconfig.ambiq"
 source "drivers/mspi/Kconfig.dw"
 source "drivers/mspi/Kconfig.mspi_emul"
+source "drivers/mspi/Kconfig.stm32"
 
 endif # MSPI

drivers/mspi/Kconfig.stm32

@@ -0,0 +1,14 @@
+# STM32 MSPI flash driver configuration options
+
+# Copyright (c) 2025 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+config MSPI_STM32
+	bool "STM32 XSPI Controller driver"
+	default y
+	depends on DT_HAS_ST_STM32_MSPI_CONTROLLER_ENABLED
+	select USE_STM32_HAL_XSPI
+	select USE_STM32_LL_DLYB
+	imply MSPI_XIP
+	help
+	  Enable driver for STM32 family of processors.