GPIO pin does not respond

Hi all,

I have a custom board that is based on beaglebone. (pretty similar)

I am trying to test out all the GPIO that are available, and am stuck with gpio2_21. The pin_muxing is done correctly; I have confirmed it by going to /sys/kernel/debug/omap_mux/mii1_rxd0.

I am trying to use the /sys/class/gpio/gpio85, and echo, value, direction, etc.

When I measure the pin with volt meter, it seems like the pin is floating.

Has anyone experienced similar issue? Any help would be greatly appreciated.

Best regards,