On Iris X16 connector pins 13-20 are gpio pins. I can export and use all pins except pin 20.
As per the Iris datasheet Pin 20 on X16 is connected to SODIMM_45.
As shown in the attachment SODIMM_45 is mapped to GPIO2_IO22 which in user space is IO 54.
I get a device in use or resource busy error when exporting. What am I missing?