How do you get GPIO output on BBB?

[X-Ryl669]

I've seen you're using a 5.15 kernel on BBB. I wonder how you succeeded getting GPIO to work on this board with this kernel ?

No matter what I'm doing, even with GPIO Device Tree's overlay, I can't get any signal to change on any GPIO, just like it got lost in a black hole (no error whatsoever). I'm not even sure the pin mux is right, but I can't change it anymore, since the bone cape manager is gone with > 4.14 kernel, IIUC.

The board worked fine on kernel 3.8 but I did one of the most stupid thing: I've updated my system, and now I've a 5.15 kernel and nothing is working anymore.

Can you post your DTS for your GPIO setup ?