Hi, I'm developing my project on a custom stm32mp135 board, baremetal. I tried to flash my FSBL into eMMC with the external loaders provided with Cube package for STM32MP13XX_CUSTOM_HW, it didn't work. Then I tried one that is provided for STM32MP135C-DK and it did work, but it only flashes SD card. My suspicion is that custom-hardware uses LPDDR3, and my board has DDR3L and that's why it fails. I can't find sources of that external loader to fix it. Are you planning on publishing it?
