PWM not working on Jetson Nano


I want to use PWM output on the Nano. I tested it with the sample script. The Nano was connected to a Saleae Logic to capture it’s output on pin 33, but it only showed me a single spike instead of a PWM signal. I searched on the internet and I think I understood that the PWM functionality should be enabled first. Now I have generated two .dtsi files but no clue what to do with those.
Can someone explain me clearly and simply how to use PWM output on the Nano?

This should be duplicated to another topic filed by you. I will close this one and move the discussion there.