[LinuxPPS] LinuxPPS with GPIO on the ARM

[Ricardo Martins]

Hi Igor,

On 26 January 2011 06:42, Igor Plyatov <plyatov at gmail.com> wrote:
> Hello!
>
> I'm novice in the LinuxPPS area. Please, help me to resolve some
> questions. I'm unable to find answers on the wiki.enneenne.com .
>
> 1) Is it possible to use LinuxPPS on the ARM platform?
>
> 2) I use linux-2.6.36 kernel. Is this version modern enough for
> LinuxPPS? If not, then I should use "latest code from
> git://git.enneenne.com/linuxpps" GIT repository for LinuxPPS as wiki
> says?
>
> 3) The "linux/Documentation/pps/pps.txt" says to make board
> initialisation as shown below:
>
>    static struct pps_source_info pps_ktimer_info = {
>            .name         = "ktimer",
>            .path         = "",
>            .mode         = PPS_CAPTUREASSERT | PPS_OFFSETASSERT | \
>                            PPS_ECHOASSERT | \
>                            PPS_CANWAIT | PPS_TSFMT_TSPEC,
>            .echo         = pps_ktimer_echo,
>            .owner        = THIS_MODULE,
>    };
>
> source = pps_register_source(&pps_ktimer_info,
>                        PPS_CAPTUREASSERT | PPS_OFFSETASSERT);
>
> but what should I write here if I have the "AT91_PIN_PB16" GPIO as input
> for PPS signal?
>
> 4) If it is not possible to use GPIO, then as I understand, it is
> required to use only 8250 compatible UART? So, I have no chances to use
> AT91SAM9 UART?
Is that GPIO capable of generating interrupts ?

Regards,
Ricardo Martins

>
> Best regards!
> --
> Igor Plyatov
>
>
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