Boot: Zephyr: Boards: Fix STM32H750B-DK App in Ext Flash support #2479
+7
−4
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…rlay Following the introduction of stm32h750b-dk 'ext_flash_app' board variant, for storing apps in external Flash and chainloading them with MCUboot that's placed in internal Flash, we need a DT overlay to designate internal Flash & controller as the chosen 'zephyr,flash' & 'zephyr,flash-controller' for the MCUboot Zephyr Application. Signed-off-by: Abderrahmane JARMOUNI <[email protected]>
STM32_MEMMAP is no longer needed since it is now set on the Zephyr side in the board's 'Kconfig.defconfig' when building MCUboot app. Also, BOOT_MAX_IMG_SECTORS_AUTO no longer need to be disabled after including the 'soc-nv-flash' binding in the 'st,stm32-qspi-nor' binding, then adding the 'erase-block-size' & 'write-block-size' properties in external Flash DT node. Signed-off-by: Abderrahmane JARMOUNI <[email protected]>
This was referenced Oct 6, 2025
nordicjm
approved these changes
Oct 6, 2025
erwango
reviewed
Oct 7, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Following the introduction of stm32h750b-dk 'ext_flash_app' board variant (zephyrproject-rtos/zephyr#97037), for storing apps in external Flash and chainloading them with MCUboot that's placed in internal Flash, we need a DT overlay to designate internal Flash & controller as the chosen 'zephyr,flash' & 'zephyr,flash-controller' for the MCUboot Zephyr Application. This way, no DT overlay will be needed at the Zephyr user app level.
Also, remove board conf file, as enabling STM32_MEMMAP is no longer needed here since it is now set on the Zephyr side in the board's 'Kconfig.defconfig' when building MCUboot app. And BOOT_MAX_IMG_SECTORS_AUTO no longer need to be disabled, after including the 'soc-nv-flash' binding in the 'st,stm32-qspi-nor' binding, then adding the 'erase-block-size' & 'write-block-size' properties in external Flash DT node.