|Warning:||This is purely U-boot build instructions at this time! You will not have crust for your Pinephone should you follow this guide.|
Building uboot manually
These instructions are written with a host Arch Linux desktop system in mind.
This guide will be especially useful if you are looking to overclock the ram on your Pinephone following the information found here.
You must have these packages installed:
dtc swig bc aarch64-linux-gnu-gcc
If you are using a different system such as Ubuntu, there are plenty of cross compilation instructions available online with which you can grab the needed package names from, and then proceed to follow these instructions.
First, You need to compile ATF (Arm Trusted Firmware):
git clone https://github.com/crust-firmware/arm-trusted-firmware/ cd arm-trusted-firmware CROSS_COMPILE=aarch64-linux-gnu- export CROSS_COMPILE export ARCH=arm64 make PLAT=sun50i_a64 bl31 cp build/sun50i_a64/release/bl31.bin ../u-boot/ cd ..
After ATF is compiled clone u-boot and copy the bl31.bin file into the u-boot directly.
git clone https://gitlab.com/pine64-org/u-boot.git cd arm-trusted-firmware cp build/sun50i_a64/release/bl31.bin ../u-boot/ cd ..
Note that you can append
-j# to the end of
make all in the proceeding instructions. Replacing the hashtag with the number of threads in your computer's CPU which you want to use for compiling, will make it go faster and use more of your processor.
cd u-boot/ git checkout crust CROSS_COMPILE=aarch64-linux-gnu- export CROSS_COMPILE export BL31=bl31.bin export ARCH=arm64 make distclean make pinephone_defconfig make all
Once successfully compiled you can proceed to flash the device
|Warning:||Replace [CHANGE THIS] with the location of your SD card|
sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/[CHANGE THIS] bs=1024 seek=8
One of the smallest and fastest pinephone bootloaders, it was developed by Ondrej Jirman with the ability of booting multiple distros on the pinephone in mind.
More information can be found here