I have created img file of parabola image uploaded at the following repo.
parabola_openrc_olinuxino_lime2 (https://notabug.org/sagaracharya/parabola_openrc_olinuxino_lime2)
I have installed this image on my server lime2. Since no OS with linux-libre and only free software is out there, I hope this to be helpful. Please give feedback if it works for you.
root password : parabola
u-boot does not have lan support in the above image. Have updated a new compiled u-boot at the above repository which needs to be flashed.
Alternatively, you can compile your own u-boot on the above parabola system by editing config file in configs/A20-OLinuXino-Lime2_defconfig and making the following changes
-CONFIG_PHY_REALTEK=y
+CONFIG_PHY_MICREL=y
+CONFIG_PHY_MICREL_KSZ9031=y
+CONFIG_GMAC_TX_DELAY=4
And then execute in u-boot directory:
make A20-OLinuXino-Lime2_defconfig
make