[LinuxPPS] kernel does not see PPS on serial port

[Rodolfo Giometti]

On Fri, Mar 07, 2008 at 10:49:54AM +0100, LICHTENBERGER Janos wrote:
> 
> and here pps enabled
> >>>>>>>>>>>
> root at whistler:~# /usr/src/linuxpps/Documentation/pps/ppsctl /dev/ttyS0 enable
> root at whistler:~# cat /proc/interrupts
>            CPU0       CPU1
>   0:        250         23   IO-APIC-edge      timer
>   1:          1       3673   IO-APIC-edge      i8042
>   2:          0          0    XT-PIC-XT        cascade
>   4:          0          2   IO-APIC-edge
>   5:          0          0   IO-APIC-fasteoi   ohci_hcd:usb1, Ensoniq
> AudioPCI
>   7:          1          0   IO-APIC-edge      parport0
>   8:          0          3   IO-APIC-edge      rtc
>   9:          0          0   IO-APIC-edge      acpi
>  10:          5      26629   IO-APIC-fasteoi   ehci_hcd:usb2, sata_nv,
> firewire_ohci
>  11:          9      25214   IO-APIC-fasteoi   HDA Intel, eth0
>  12:         38      61649   IO-APIC-edge      i8042
>  14:         15      41297   IO-APIC-edge      libata
>  15:          0          0   IO-APIC-edge      libata
> 220:        419    1035304   PCI-MSI-edge      eth1
> NMI:          0          0   Non-maskable interrupts
> LOC:    3821299    3822705   Local timer interrupts
> RES:     204182       9259   Rescheduling interrupts
> CAL:        107         38   function call interrupts
> TLB:         26         31   TLB shootdowns
> TRM:          0          0   Thermal event interrupts
> SPU:          0          0   Spurious interrupts
> ERR:          1
> MIS:          0

On Fri, Mar 07, 2008 at 11:51:49AM +0100, LICHTENBERGER Janos wrote:
> 
> I did 'cat /dev/ttyS0' a few times, the irq 4 counter increased each time
> after cat-ing, but otherwise remained unchanged

It seems that on IRQ 4 there are no drivers registered... strange...

Look at my system:

giometti at jeeg:~$ cat /proc/interrupts 
           CPU0       
  0:      44169    XT-PIC-XT        timer
  1:          2    XT-PIC-XT        i8042
  2:          0    XT-PIC-XT        cascade
  4:          1    XT-PIC-XT        serial
  6:          3    XT-PIC-XT        floppy
  9:          0    XT-PIC-XT        ohci_hcd:usb1
 10:        809    XT-PIC-XT        eth0
 12:          4    XT-PIC-XT        i8042
 14:       3926    XT-PIC-XT        ide0
NMI:          0   Non-maskable interrupts
LOC:          0   Local timer interrupts
RES:          0   Rescheduling interrupts
CAL:          0   function call interrupts
TLB:          0   TLB shootdowns
TRM:          0   Thermal event interrupts
SPU:          0   Spurious interrupts
ERR:          0
MIS:          0

as you can see I got "serial" on the last column.

Ciao,

Rodolfo

-- 

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