There is already a howto on how to install Arch on a Orange Pi One.
The only difference for me was to compile it with another OrangePi defconfig and toolchain with hardware float (apt-get install gcc-arm-linux-gnueabihf).
You can find the appropriate defconf for your OrangePi here.
The config for u-boot looks like:
make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- orangepi_plus2e_defconfig make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
The only thing that didn’t work was the wifi adapter. I found an aur repository for the kernel module. It uses the same git repo as this howto.
After the restart the right kernel module was loaded and wifi worked, yeeeehaaaa 🙂
More information about the OrangePi Plus 2E.