No interrupts coming to device driver.

Alexander Nedotsukov bland at
Fri Nov 11 04:02:58 GMT 2005

Hans Petter Selasky wrote:
> On Thursday 10 November 2005 09:50, Alexander Nedotsukov wrote:
>> Hi,
>> I trying to create small lirc ( compatible CIR driver for
>> it8705 chip (sits on ISA bus). My problem is I can not get interrupts
>> coming to driver. I believe I configured chip (carrier freq. + baudrate
>> divisor) and enabled interrupt mode the same way it windows driver does.
>> It also seems to be correct according to chip specs. But nothing. vmstat
>> -i shows zeros for assigned irq. And my IRS stay cold. I wrote small
>> userland program which polls CIRs IIR (interrupt identefication
>> register) and it shows interrupt pending bit set on right after I press
>> key on remote control. Looks like I missed something fundamental. Does
>> anyone can give me a hint where to look?
> Sounds like you have an unacknowledged interrupt. Does it help if you call the 
> interrupt handler once after that your chip has been reset and configured?
Did you mean unacknowledged to chip or interrupt controller? Anyway 
calling interrupt handler right after initialization does not seem to help.
> Else sharing some of the source code might help.
Here you are:


More information about the freebsd-hackers mailing list