[LinuxPPS] Patches for kernel 2.6.26-rc8

[Rodolfo Giometti]

On Sun, Jul 06, 2008 at 10:36:02AM -0700, Hal V. Engel wrote:
>    On Sunday 06 July 2008 01:58:59 am Rodolfo Giometti wrote:
>    > On Sun, Jul 06, 2008 at 01:31:38AM -0700, Hal V. Engel wrote:
>    > > I have tested this setup and I am seeing a number of issues. I even
>    > > started over with fresh images just to make sure I had everything
>    > > correct.
>    > >
>    > > First I still have to run setserial on the port to get things to work.
>    > > If I don't the OnCore driver can't communicate with the GPS.
>    >
>    > Please, report the setserial command you used.
> 
>    I am currently using the following udev rule.
> 
>    KERNEL=="ttyS1", RUN+="/bin/setserial -v /dev/%k low_latency hardpps",
>    SYMLINK+="oncore.serial.0"
> 
>    But if I remove this rule I can get things working by first running:
> 
>    /bin/setserial -v /dev/ttyS1 hardpps
> 
>    and then
> 
>    /bin/ppsldisc /dev/ttyS1
> 
>    which results in a working interface to the GPS. If I don't run setserial
>    first ppdldisc creates the PPS device and ppstest shows that it is working
>    but the OnCore driver can't talk to the GPS and fails during
>    initialization.

Sorry, was my fault, I explained myself wrong. You don't need
«setserial hardpps» but you still need «setserial low_latency», so
change the rule as:

	KERNEL=="ttyS1", RUN+="/bin/setserial -v /dev/%k low_latency",
	SYMLINK+="oncore.serial.0"

then run /bin/ppsldisc /dev/ttyS1

>    >
>    > Also, please, add these printk()s into file drivers/serial/8250.c as
>    > follow:
>    >
>    > static void
>    > serial8250_set_ldisc(struct uart_port *port)
>    > {
>    > int line = port->line;
>    >
>    > printk("TEST serial8250_set_ldisc line %d\n", line);
>    > if (line >= port->info->tty->driver->num)
>    > return;
>    >
>    > if (port->info->tty->ldisc.num == N_PPS) {
>    > printk("TEST enable MS ldisc %d\n", port->info->tty->ldisc.num);
>    > serial8250_enable_ms(port);
>    > }
>    > }
>    >
>    > You should see the above messages when you enable the N_PPS ldisc.
> 
>    OK I will do this and test it.

Thanks. You should see such messages when you run ppsldisc.

Ciao,

Rodolfo

-- 

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