How to use UART as serial boot device with STM32CubeProgrammer

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Applicable for

STM32MP13x lines, STM32MP15x lines

The OpenSTLinux distribution does not provide flashlayout files to use UART as serial boot device.

Refer to Using_STM32Programmer_over_UART article to know how to modify a flashlayout file to use UART as serial boot device.
You can use the modified flashlayout as described in STM32CubeProgrammer#How to flash with STM32CubeProgrammer article.

For example, if the provided file FlashLayout_sdcard_stm32mp157c-dk2-optee.tsv can be used on USB with the command:

   STM32_Programmer_CLI -c port=usb1 -w FlashLayout_sdcard_stm32mp157c-dk2-optee.tsv

then you can replace, in this tsv file, tf-a-stm32mp157f-dk2-usb.stm32 by tf-a-stm32mp157f-dk2-uart.stm32 and the resulting file FlashLayout_sdcard_stm32mp157c-dk2-optee_uart.tsv can be used on UART port /dev/ttyACM1 with the command:

   STM32_Programmer_CLI -c port=/dev/ttyACM1 -w FlashLayout_sdcard_stm32mp157c-dk2-optee_uart.tsv