[LinuxPPS] Multiple device tree pps-gpio overlays?

[Frank Wayne]

Much appreciated. When I get back home next month, I hope to have some time to test this.

-----Original Message-----
From: discussions-bounces at linuxpps.org <discussions-bounces at linuxpps.org> On Behalf Of tom burkart
Sent: Sunday, 06 May, 2018 04:55
To: discussions at linuxpps.org
Subject: Re: [LinuxPPS] Multiple device tree pps-gpio overlays?

Hi,
just replying to an old post (Oct 2017):

> I am trying to create two PPS devices on a Raspberry Pi 3 running 
> Raspbian (Stretch). My config.txt contains:
> dtoverlay=pps-gpio,gpiopin=17
> dtoverlay=pps-gpio,gpiopin=18
> This creates only a single PPS sevice: /dev/pps0. How do I get two (or 
> more) devices?

I have a running RPI with PPS on pin 18 that works quite well.
What you are doing requires a second pps-gpio.dtbo with some labels changed so that it works as a second PPS input.

I have attached a modified dtbo file together with its source file so you can experiment yourself.  These are untested and may need further modifications before it works.  BTW, "dtc" is the command to convert between the two.

Kind regards,

Tom