We provided Fenix for you to build the Ubuntu OS images easily. You can follow the steps bellow to build U-Boot.
Choose your board (e.g. Edge2), U-Boot version, Linux version, system version, etc.
$ source setenv.sh
Choose the correct version for your requirements.
Build U-Boot with a single command:
$ make uboot
The binaries are located in U-Boot source code root directory. You'll need uboot.img and rk3588_spl_loader_vx.xx.xxx.bin.
uboot.img - U-Boot image.rk3588_spl_loader_vx.xx.xxx.bin - SPL loader image, x.xx.xxx means version, e.g. 1.07.111You can also choose the Debian U-Boot package:
$ make uboot-deb
Debian packages are located in build/images/debs/{VERSION}/{BOARD}.
VERSION : refers to the Fenix version, e.g. 1.1.1
BOARD : refers to the Khadas SBC, e.g. Edge2
The folder location is build/images/debs/1.1.1/Edge2, and the Debian U-Boot package is linux-u-boot-xxx-xxx_xxx-xxx_arm64.deb.
linux-u-boot-edge2-vendor_1.0.11-2017.09_arm64.deb
U-Boot for Edge2, the branch is khadas-edges-v2017.09.