Re: NetBSD as an NTP stratum 1 server

[joelp%sdf.org@localhost]

>> Greg Troxel <gdt%lexort.com@localhost> writes:
>>
>>> Brad Spencer <brad%anduin.eldar.org@localhost> writes:
>>>
>>> (The advice about "use gpio" is good - I am just trying to clarify USB
>>> PPS.)
>>
>> It has worked very well for me, assuming that the GPS module is stable.
>> I had one that would have a tendency to crash in its firmware after
>> being up for a while and totally lose its mind.
>>
>
> Thanks for the detailed information and discussion.
>
> I built a kernel for my Rock64 on its bigger sibling RockPro64 (has a PCIe
> SSD card) -- sorry, okay, that was me just saying how much I enjoy these 2
> devices! Anyway...I ran into a problem initializing gpiopps. Here is the
> Rock64 output when initializing with gpio.conf:
>     [1.000004] gpiopps0 at gpio1 pins 28
>     [1.000004] gpiopps0: autoconfiguration error: positive edge interrupt
> not supported for ASSERT
> I also booted single user and it fails using gpioctl. Taking a peek at
> src/sys/dev/gpio/gpiopps.c this would be in the second if-block (1 pin) in
> gpiopps_attach:
>         if (!gpio_intr_str(sc->sc_gpio, &sc->sc_map, 0,
>                    sc->sc_intrs[0].sc_irqmode,
>                    sc->sc_intrs[0].sc_intrstr,
>                    sizeof(sc->sc_intrs[0].sc_intrstr))) {
>             aprint_error_dev(self,
>                 "failed to decode interrupt\n");
>             gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
>             return;
> Here's what I added to evbarm/conf/GENERIC64:
>     gpiopps* at gpio1 offset 28 mask 0x1 flag 0x2
> This is for physical pin 7 which per pine64 wiki is GPIO1_D4. So gpio1 and
> D=3, so 3*8 + 4 = port 28.
>
> I tried also modifying the RockPro64 kernel -- similar issue.
>
> Any idea what am I doing wrong?
>
> Thanks - Joel
>
>
And sorry, wrong code block from gpiopps.c:
        } else {
            aprint_error_dev(sc->sc_dev,
                "%s edge interrupt not supported for ASSERT\n",
                assert_edge == GPIO_INTR_POS_EDGE ? "positive"
                                      : "negative");
            gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
            return;
        }