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Debian Build U-Boot from source code

Toolchain Installation for Out of Debian Builds

To install the toolchain, follow the Debian Flexbuild Toolchain installation guide.

Build U-Boot Out of Tree

Obtain sources:

git clone https://github.com/varigit/uboot-imx.git -b lf_v2024.04_6.6.52-2.2.0_var01
cd uboot-imx

Configure compilation environment:

export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-

Cleanup everything:

make mrproper

Select configuration:

For booting from SD card/eMMC:
make imx6ul_var_dart_mmc_defconfig

Build U-Boot:

make -j$(nproc)

Install the Built U-Boot on an SD Card

sudo dd if=u-boot-with-spl.imx of=/dev/sdX bs=1K seek=1; sync

(Replace /dev/sdX with the correct device)

If you want to use our recovery SD card to flash the built U-Boot to eMMC, then copy it to the appropriate location in the SD card:

sudo cp u-boot-with-spl.imx /media/rootfs/opt/images/Debian

And eject the SD card gracefully from host machine.

Note: If you manually upgrade an existing U-Boot, and you have an old environment saved, it is a good idea to reset your environment to the new default.)

Update Your U-Boot Out of Debian Tree

git pull