[LinuxPPS] Please review LinuxPPS section on time.qnan.org

[Philip M. White]

On Sun, Jun 04, 2006 at 07:51:22PM +0200, Rodolfo Giometti wrote:
> First of all let me suggest you to use lastest LinuxPPS
> implementation, that is 2.1.0 which also has a new and powerful procfs
> support. :)
> 
> «Linux 2.4 has the popular PPSkit patch, and Linux 2.6 has a set of
> custom patches provided to me by Udo van den Heuvel; these were
> adapted from Rodolfo Giometti, who maintains them»
> 
> Please, note that all Udo's patches are available also on my site and,
> just to avoid duplicating the code, I suggest to you to refere only
> one site.
> 
> I think Udo have already tested patches on my site so I think you
> should refere to them. Udo? What do you think about it? Are you agree?

I agree that duplication of code is not necessary and should be avoided.
The only reason I am duplicating it now is that this is what Udo sent me
to host for him, and these are the patches are used for my machine.  I
have not seen the original patches, but from what I understand, they do
not patch cleanly and require modifications...

So, are you saying that Udo's modifications are now rolled into the
official sources, and Udo's patches are no longer necessary?  If so,
then it's good news!

> «LinuxPPS requires that your GPS is connected to the PC only over an
> 8250-compliant port. If this is not the case, you cannot use this
> driver.»
> 
> This is not completely true... LinuxPPS allow user to define their own
> LinuxPPS clients whose can get PPS signal from everywhere: external
> GPIOs, parallel ports etc.. The problem is that, currently, exists
> only one functional client: the 8250. :)
> 
> This is the real «important thing» of LinuxPPS. Please see:
> 
>    http://wiki.enneenne.com/index.php/LinuxPPS_support#Coding_example
> 
> I developed LinuxPPS just to have a flexible tool to collect PPS
> signals not only from a serial line...

Good point; I took the easy way out and just said "8250--good, anything
else--bad", but I'll be sure to clarify that it is extendable and that
only *right now* only 8250 support exists, but anyone is welcome to
extend it to other drivers.

-- 
Philip
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