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Boot: Zephyr: Boards: Fix STM32H750B-DK App in Ext Flash support #2479

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Boot: Zephyr: Boards: Fix STM32H750B-DK App in Ext Flash support #2479

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boot: zephyr: boards: add stm32h750b_dk_stm32h750xx_ext_flash_app ove…
JarmouniA Oct 5, 2025
2a84c8c
boot: zephyr: boards: stm32h750b_dk_ext_flash_app: remove conf file
JarmouniA Oct 5, 2025
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4 changes: 0 additions & 4 deletions boot/zephyr/boards/stm32h750b_dk.conf
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7 changes: 7 additions & 0 deletions boot/zephyr/boards/stm32h750b_dk_stm32h750xx_ext_flash_app.overlay
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I wonder why this has to be applied to a stm32h750b_dk/stm32h750xx/ext_flash_app target.
My understanding of zephyrproject-rtos/zephyr#97037, is that stm32h750b_dk/stm32h750xx is the target running on internal flash.

This way, we re-use zephyr,flash and zephyr,flash-controller, which are already defined for stm32h750b_dk.dts. And since zephyr,code-partition = &boot_partition; is already defined in app.overlay we don't have any dependency on MCUBoot anymore

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@JarmouniA JarmouniA Oct 7, 2025 •
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The memory layout for running a user app from external Flash is in ext_flash_app variant dts, and we use stm32h750b_dk/stm32h750xx/ext_flash_app target when building with sysbuild.

Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
/ {
chosen {
zephyr,flash = &flash0;
zephyr,flash-controller = &flash;
zephyr,code-partition = &boot_partition;
};
};