PPS input on GPIO pin RPI2.

[Ian Lepore]

On Fri, 2016-11-18 at 14:35 -0800, Andreas Ott wrote:
> Hi,
> 
> > 
> > I committed a gpiopps driver months ago...
> > https://svnweb.freebsd.org/base/head/sys/dev/gpio/gpiopps.c?view=lo
> > g
> > It should work on any system that uses FDT data.
> Please confirm, this is in HEAD and CURRENT and has not yet been MFC 
> into STABLE.
> 
> I will start on a RPI2 with an image from snapshots/arm/armv6/ISO-
> IMAGES/12.0/
> and see how far I get.
> 
> -andreas

It is in stable-11, but not in any versions earlier than that.  I think
stable-10 is missing some other FDT-related infrastructure this would
need.

You probably need to build a custom kernel with OPTIONS PPS and device
gpiopps to get the functionality.

-- Ian