$ git clone --recursive https://github.com/armbian/u-boot-sun50i Cloning into 'u-boot-sun50i'... remote: Counting objects: 104, done. remote: Total 104 (delta 0), reused 0 (delta 0), pack-reused 104 Receiving objects: 100% (104/104), 15.69 KiB | 0 bytes/s, done. Resolving deltas: 100% (60/60), done. Submodule 'arm-trusted-firmware' (https://github.com/apritzel/arm-trusted-firmware.git) registered for path 'arm-trusted-firmware' Submodule 'u-boot' (https://github.com/apritzel/u-boot.git) register