Does anyone have a working example of setting up an external (active low) interrupt to the ls1088a processor which they could share? I am writing a kernel module to handle interrupts and I have tried setting this up as a direct interrupt and as a GPIO through expander. I have also tried using the recent ‘extirq’ linux kernel changes added to v5.5. In all cases the processor does not recognize the interrupt assertion.
Any help is much appreciated. Thank you.