Hello @_Krishna ,
Your overall understanding is partially correct.
Indeed, you have to modify what we call the board device tree (DTS) so that the HW configuration matches with your own board. The pinctrl as you mentioned it is to adapt to your needs too, but you can rewrite the pin configuration in your board DTS file.
However, for your own design, sometimes starting from the Evaluation board DTS is a bit tricky. CubeMX tool is supposed to create you all the device tree you need regarding the configuration you set.
Another important point, because it seems that you are targeting the Linux kernel here, but the DTS have to be changed/adapted in every BSP component (Linux, OP-TEE, U-Boot, TF-A) if you hope to get a bootable board at the end.
DDR configuration is also to adapt depending on your design.
Kind regards,
Erwan.
PS: Some useful links:
- https://wiki.st.com/stm32mpu/wiki/How_to_create_STM32MPU_projects_with_STM32CubeMX
- https://wiki.st.com/stm32mpu/wiki/How_to_create_your_product_from_design_to_manufacturing
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