Hi,
What is the simplest way to test touchscreen functionality? Is there any built-in/example script to do that?
The display itself seems working, but the boot log has the following line :
[ 11.175926] edt_ft5x06 2-0038: touchscreen probe failed
The LIME2 seems to be correctly configured for the digital interface (RM2 assembled, RM1 not assembled). Default Olimex-supplied Debian image.
Did you check if cts overlay is enabled with olinuxino-display?
The respective i2c is enabled in olinuxino-overlay?