The P5020 pins AJ13, AG17, and AM13 can be used as either GPIO or external interrupt (P5020 Hardware Specification p21, P5020RM table 3-9). If I set these pins to GPIO function using the RCW, can I still use all four legacy PCI interrupts on PCIe controller 2, which are mapped to IRQ5,6,7 (P5020RM table 25-3)?
On my current board Linux sees unexpected interrupts on these lines when set to GPIO mode, unless I both set the pins to interrupt mode and pull them up.
Thanks - that may require a bit of work on the Linux setup code, which assumes they are active low because they are legacy PCI.
It's not looking like a problem for us now - all these lines on our board pass through a PLD, so we can easily change our usages to be compatible.