[LinuxPPS] PPS SC16IS7X2

[Rodolfo Giometti]

On Thu, Oct 11, 2012 at 02:25:53PM +0000, Nial Peters wrote:
> 
> Thanks for the quick reply.
> 
> > I suppose it lacks PPS support. See function uart_handle_dcd_change in
> > serial_core.c.
> 
> uart_handle_dcd_change seems to be defined inline in serial_core.h for some reason. There are no calls to it inside the sc16is7x2.c file, so I guess you are right - no pps support :(
> 
> Is this something that would be relatively easy to patch into the sc16is7x2 driver? I'd be willing to have a go at this, but other than a basic grasp of C I am pretty clueless so would need some pointers. Would it be as simple as adding calls to uart_handle_dcd_change function to the sc16is7x2.c file?

Which kernel version are you referring to? I'm currently NOT found
file sc16is7x2.c into vanilla tree... :'(

I think you should add support for calling dcd_change TTY's
method. See function uart_handle_dcd_change into file serial_core.c.

> Otherwise, would my best option be to put the GPS PPS line onto a GPIO pin and try using the pps-gpio client?

This could be another solution but you need to modify your hardware!

Ciao,

Rodolfo

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