Boot: Zephyr: Boards: Fix STM32H750B-DK App in Ext Flash support #2479
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This was referenced Oct 6, 2025
nordicjm
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Oct 6, 2025
erwango
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Oct 7, 2025
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@nordicjm all tests are passing in zephyrproject-rtos/zephyr#97037, this PR is ready to be merged. |
erwango
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Oct 16, 2025
erwango
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Oct 16, 2025
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Late catch, sorry (but as I understood there will be anyway some changes needed).
Instead of using <board>_<file_suffix>, let's move to <soc>_<file_suffix> already since it will save us from some duplication (and allow other (out of tree) H750xx users to benefit from this)
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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. BOOT_MAX_IMG_SECTORS_AUTO no longer need to be disabled after including the 'soc-nv-flash' compatible in the board's external flash node, & declaring the 'erase-block-size' & 'write-block-size' properties. Signed-off-by: Abderrahmane JARMOUNI <[email protected]>
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erwango
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Oct 17, 2025
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@nordicjm @de-nordic Can this PR be merged? |
nordicjm
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Oct 20, 2025
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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.
Turn the board's
.conf&.overlayfiles into a SoC ones, so they apply to all boards using STM32H750XX SoC.BOOT_MAX_IMG_SECTORS_AUTO=nno longer needed after adding an external flash node to board's common.dtsiwith 'soc-nv-flash' compatible, & declaring the 'erase-block-size' property.