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nxp/s32k3: add C40 internal flash driver + MCUboot flow for MR-CANHUBK3 #97401

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nxp/s32k3: add C40 internal flash driver + MCUboot flow for MR-CANHUBK3 #97401

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1c43b9b
drivers: flash: add MCUX C40 flash driver for NXP S32K3x
sumitbatra-nxp Oct 11, 2025
ce92150
dts: nxp: s32k3: add C40 flash binding and SoC flash0 node
sumitbatra-nxp Oct 11, 2025
d01c6ab
boards: nxp: mr_canhubk3: enable flash0 and add MCUboot overlays
sumitbatra-nxp Oct 11, 2025
38081d9
soc: nxp: s32k3: gate IVT emission when chain-loaded by MCUboot
sumitbatra-nxp Oct 11, 2025
eea1be7
west.yml: hal_nxp: update revision to pull in C40 flash driver
sumitbatra-nxp Oct 11, 2025
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10 changes: 10 additions & 0 deletions drivers/flash/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -167,6 +167,16 @@ if(CONFIG_FLASH_NXP_S32_QSPI_NOR OR CONFIG_FLASH_NXP_S32_QSPI_HYPERFLASH)
zephyr_library_include_directories(${ZEPHYR_BASE}/drivers/memc)
endif()

zephyr_library_sources_ifdef(CONFIG_FLASH_MCUX_C40_API flash_mcux_c40.c)
# Run the driver from RAM or another relocation source when relocation is enabled
if(CONFIG_FLASH_MCUX_C40_API AND CONFIG_CODE_DATA_RELOCATION)
zephyr_code_relocate(FILES ${CMAKE_CURRENT_LIST_DIR}/flash_mcux_c40.c LOCATION RAM)
if(DEFINED ZEPHYR_HAL_NXP_MODULE_DIR)
# Relocating HAL driver from Zephyr keeping HAL RTOS-agnostic
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cmake indent is 2 spaces

zephyr_code_relocate(FILES ${ZEPHYR_HAL_NXP_MODULE_DIR}/mcux/mcux-sdk-ng/drivers/flash_c40/fsl_c40_flash.c LOCATION RAM)
endif()
endif()

if(CONFIG_SOC_FLASH_RENESAS_RA_HP)
zephyr_library_sources(soc_flash_renesas_ra_hp.c)
zephyr_library_sources_ifdef(CONFIG_FLASH_EX_OP_ENABLED soc_flash_renesas_ra_hp_ex_op.c)
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29 changes: 29 additions & 0 deletions drivers/flash/Kconfig.mcux
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Expand Up @@ -118,3 +118,32 @@ choice FLASH_LOG_LEVEL_CHOICE
endchoice

endif # DT_HAS_NXP_IMX_FLEXSPI_ENABLED

# MCUX C40 internal flash API shim (S32K3x)
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Suggested change
# MCUX C40 internal flash API shim (S32K3x)
# MCUX C40 internal flash driver (S32K3x)

config FLASH_MCUX_C40_API
def_bool y
depends on SOC_SERIES_S32K3
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redundant with DT_HAS_NXP_S32K3X_C40_FLASH_ENABLED

depends on DT_HAS_NXP_S32K3X_C40_FLASH_ENABLED
select FLASH_HAS_DRIVER_ENABLED
select FLASH_HAS_EXPLICIT_ERASE
select FLASH_HAS_PAGE_LAYOUT
# C40 uses controller commands, not CPU stores to flash
# so we are not relaxing MPU for ROM writes.
# Relocate driver/HAL when XIP so erase/program run from SRAM:
imply CODE_DATA_RELOCATION if XIP
imply CODE_DATA_RELOCATION_SRAM if XIP
help
Enable the MCUX C40 internal flash API shim used on NXP S32K3x
(e.g. S32K344). Provides Zephyr flash driver glue for &flash0 using
the MCUX C40 HAL. Needed for FLASH_MAP/MCUboot on internal flash
Comment on lines +136 to +138
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Suggested change
Enable the MCUX C40 internal flash API shim used on NXP S32K3x
(e.g. S32K344). Provides Zephyr flash driver glue for &flash0 using
the MCUX C40 HAL. Needed for FLASH_MAP/MCUboot on internal flash
Enable the MCUX C40 internal flash driver used on NXP S32K3x
(e.g. S32K344). Provides Zephyr flash API using MCUX C40 HAL.


# NXP MCUX C40 internal flash: optional protection pass at init
config FLASH_MCUX_C40_APPLY_PROTECTION
bool "Apply default protection windows (IVT/MCUboot) at init"
depends on FLASH_MCUX_C40_API
default y if XIP
help
When enabled, the driver locks/unlocks protection for well-known
regions derived from devicetree (e.g. ivt_header, ivt_pad, mcuboot)
during driver init. Useful on XIP systems to keep IVT/bootloader
areas read-only. Disable if your bootloader/policy manages this.
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