Actually, ir_rx is not used anywhere, because PL11 is the only pin which supports HW IR receive.
I don't need the 'IR RX mode' you are talking about.
Which mode you need then? TX? It is not supported by HW.
That's what I do on rapsberry :
modprobe lirc_rpi gpio_in_pin=17
How can I do on NanoPiNeoAir ?
P.S. This driver doesn't use HW unit, you should use sunxi_cir (or something like that, I can't check in this moment) for pin PL11
AFAIK, RPi doesn't have HW IR support. Driver emulates this functionality through GPIO and external interrupts. Some people already fiddle with it, but I did not hear any success story. I'm not sure if those people actually understand what they were doing. One of the prerequirements is that pin must support external interrupt.
I never bothered to try to make it work on a GPIO if HW IR on PL11 work flawlessly on basically any Orange and should on any other board too. There are some who managed to hand solder it to One and it worked.
According to Orange Pi PC Plus schematic that 10k pull up is ok for IR. Just add 33R resistor between 3.3V and IR receiver power pin and decoupling capacitor and you should be fine.
I still don't understand why you are so determined to use it on another pin.