Hi,
I am recieving a 'tick' from an electronic device, through the parallel
port pin-10. This pin generates an interrupt, so I am handling this
using the parport(_pc) generic module. This works flawlessly on a normal
linux, but using the -rt patches, the IRQ is not taken by the module.
Normal linux:
---
# modprobe parport
# modprobe parport_pc
# cat /proc/interrupts
CPU0
0: 5430087 XT-PIC-XT timer
1: 13743 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
7: 48100 XT-PIC-XT parport0
...
---
Linux-rt:
---
# modprobe parport
# modprobe parport_pc
# cat /proc/interrupts
CPU0
0: 382921 XT-PIC-XT timer
1: 8 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
7: 6 XT-PIC-XT
...
---
In my own module I have tried to enable, request and wake the IRQ but
with no success.
I've check the linux/drivers/parport/parport_pc.c in both kernels, and
they are identical. Also i've look at linux/kernel/irq/manage.c diffs and maybe
the parport module should ask for a IRQF_NODELAY interrupt?.
I am not very sure how the interrupts are managed in RT_PREEMPT, so any
comment will be very helpfull.
Bye
--
Mauricio Araya L.
ACS-UTFSM Team Leader, cel: 0-81564903
Est. Magister en Ciencias de la Informatica UTFSM, Valparaiso, Chile
counter.li.org: #249395, http://www.inf.utfsm.cl/~maray
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
