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********************* NXP i.MX91 EVK board ********************* This file documents the Buildroot support for the i.MX 91 EVK board. See [1]. Build ===== First, configure Buildroot for the i.MX 91 EVK board: make freescale_imx91evk_defconfig Build all components: make You will find in output/images/ the following files: - ahab-container.img - bl31.bin - boot.vfat - ddr_fw.bin - Image - imx91-11x11-evk.dtb - imx9-boot-sd.bin - lpddr4_pmu_train_fw.bin - rootfs.ext2 - rootfs.ext4 - rootfs.tar - sdcard.img - u-boot-atf-container.img - u-boot.bin - u-boot-hash.bin - u-boot-spl.bin - u-boot-spl-ddr.bin - u-boot-spl-padded.bin Create a bootable SD card ========================= To determine the device associated to the SD card have a look in the /proc/partitions file: cat /proc/partitions Buildroot prepares a bootable "sdcard.img" image in the output/images/ directory, ready to be dumped on a SD card. Launch the following command as root: dd if=output/images/sdcard.img of=/dev/<your-sd-device> *** WARNING! This will destroy all the card content. Use with care! *** For details about the medium image layout, see the definition in board/freescale/common/imx/genimage.cfg.template_imx9. Boot the i.MX 91 EVK board =============================== To boot your newly created system (refer to the i.MX 91 EVK Documentation [2] for guidance): - insert the SD card in the SD slot of the board; - Configure the switches as follows: SW1301: 0100 SW1301[1-4] - put a micro USB cable into the Debug USB Port and connect using a terminal emulator at 115200 bps, 8n1; - power on the board. Note: the debug USB connector presents 4 UARTs (for example /dev/ttyUSB[0-3]), the Cortex-A55 UART is the 3rd one (in the previous example, /dev/ttyUSB2). Refer to the documentation [2] for more details. Enjoy! References ========== [1] https://www.nxp.com/imx93evk [2] https://www.nxp.com/document/guide/getting-started-with-the-i-mx-91-evk:GS-i.MX91EVK