CL-SOM-iMX7: U-Boot: Building Images

Git clone

• Install git version control system.
• Create a clone of U-Boot tree

cd /home/development/cl-som-imx7/u-boot
git clone https://github.com/compulab/u-boot.git -b v2017.07-cl-som-imx7-1.9 u-boot-cl-som-imx7
cd u-boot-cl-som-imx7

• Create a branch for CL-SOM-iMX7 development

git checkout -b cl-som-imx7-1.9-devel

Building the firmware images

• First, compile U-Boot. The following commands create the u-boot.imx binary (along with other image types):

export ARCH=arm
export CROSS_COMPILE=arm-none-linux-eabi-
make mrproper
make cl-som-imx7_defconfig && make

• Merge the SPL and U-Boot images into one firmware image:

dd if=/dev/zero count=640 bs=1K | tr '\000' '\377' > cl-som-imx7-firmware
dd if=SPL of=cl-som-imx7-firmware bs=1K seek=1 conv=notrunc
dd if=u-boot.img of=cl-som-imx7-firmware bs=1K seek=64 conv=notrunc