On Fri, 14 Aug 2009 22:27:39 +0800 Baojun Wang <wangbj...@gmail.com> wrote:
> I need to configure CPM2 PORTC pin (PC9) for external interrupt, when I > read the MPC8555ERM.pdf and cpm2-pic.c, I find that PC9 interrupt number is > 56, and I request the IRQ in this way: > > hw_irq = 56; > virq = irq_create_mapping(cpm2_host, hw_irq); > > reqeust_irq(virq, ...); > > I can request the irq successfully, but the interrupt is never generated > (ISR is not called) to the PC9 pins, even though the hardware said an > interrupt was raised. (the hardware have a register with a special bit) > > Should I configure the cpm2 io port first to allow PORTC interrupt? I have > read the cpm2 io port documentation, and I initialize the PC9 as: > > PPARC[pc9_bit] = 0; /* for general purpose IO, not dedicated */ > PSORC[pc9_bit] = 0; /* no special option */ > PDIRC[pc9_bit] = 0; /* for both input/output */ > > Am I missing some thing? Any suggestion will be greatly appreciated. Hi, Have a look on commit 7f3ea17f316577e31db868f720ac575c74d20163, which fixes a linux bug about Port C interrupts Also note that the 8555 have the same issue that the 8272 about PC2 / PC3 missing which shifts other vectors, but I don't know if 56 for PC9 take that into account. PS: in the future make sure to include your Linux version number, so we know if an issue apply or not. -- Guillaume KNISPEL _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
