Why FPGA to HPS Interrupts is only working for Switches?

Hello.

I have catched the IRQ 41 on Linux, but it's only working when I set the output to a switch peripheral.

I have built the device-tree and I have created a Kernel module which reads the interrupts and performs an action. In my case I want to receive an IRQ, read the value, negate it, and then, send it back to the FPGA.

In the Qsys I assigned the IRQ 0 to the bus 0. And in the pin planner i'm assigning a pin for a switch. It's working.

But... When I want to send a signal from a key or from an FPGA generated signal, it doesn't catch it and I don't know why.

This is the result when I use a SW. I also can see on the oscilloscope the output from the HPS, because I amsending it back to the FPGA and outputting it through GPIO.