Is the pointercal file the same file like from x_input_calibration?
No - this has nothing to do with x_input_calibration.
I dont want to swap axes. I need to invert only the x axe. When I move up, the cursor goes down. The y-axe is fine.
Ah, I misread. I don't think there is such option in tslib. But would be easy to add it to linear module.