Additional pps-gpio

Gary E. Miller gem at rellim.com
Tue Jan 23 21:58:40 UTC 2018


Yo Achim!

> > Agai, the problem
> > is not using multiple such devices, it's with actually getting them
> > configured in the kernel.  
> 
> How about this on a RasPi:
> 
> # Uptraonics on gpio 18
> dtoverlay=pps-gpio,gpiopin=18
> # adafruit HAT
> dtoverlay=pps-gpio,gpiopin=4

Ah, now I see the problem on the RasPi.

These work, when you use just one or the other:

    # Uputronics on gpio 18
    dtoverlay=pps-gpio,gpiopin=18

    # adafruit HAT on gpio 4
    dtoverlay=pps-gpio,gpiopin=4

But put use both and you still on get one /dev/ppsX

Also, you would expect this to work, but it also jsut give you one
/dev/ppsX:

    dtoverlay=pps-gpio,gpiopin=18,4

So the problem is with the RasPi kernel.  Go ahead and nag them for us.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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