Did you enable it in DT file? Anything that it isn't soldered on the board it's not enabled by default. Currently you have to decompile DT file, search for IR node, change status = "disabled"; to status = "okay"; and compile it. Note that change will be lost if you update your image.
Better solution exists (DT overlay), where you would change just one line in config file (similarly to RaspberryPi) and it would be persistent through updates, but it needs more work in LibreELEC build system.
jernej do you mean something like the patches in this post?
jernej could you please add IR receiver to A64 family as well?
I created 2 small patches for this, 1st to add IR pins to A64 device tree:
and 2nd to enable IR on all Pine64 boards:
It works for my PineA64+ board and should work for all A64 family, because pins and IRQ are the same.
lumpi you can put ir-keytable -a /storage/.config/rc_maps.cfg into /storage/.config/autostart.sh to load your rc map after reboot. Don't forget to chmod +x on autostart.sh file.