Hi Stephan, > You seem to have used the wrong IRQ number though. Please see below. > > You are using the "External IRQ 8". This results in IRQ number 19 of the 2nd > interrupt controller of the 440ep. So please try (19+32) as the IRQ number > upon requesting the interrupt.
Yep, that was it! Now while looking at some of the other drivers, I noticed the use of the following syntax: unsigned long flags; local_irq_save(flags); ... mfdcr, mtdcr, etc operations ... local_irq_restore(flags); which is treating the operations on the DCRs as a critical section. I should probably be doing the same when I enable the external IRQs and modify the GPIO registers. Any comments on that? Dave
