[Asterisk-Users] WRT54GS zaptel timing device

[Kevin P. Fleming]

Kristian Kielhofner wrote:

> I don't think that this little box has a RTC to do the 1000hz on 2.6.  I 
> have built OpenWRT and 'grep -i rtc .config' in the kernel directory 
> reports that CONFIG_RTC is not set - not good news.  I don't know if a 
> 2.6 kernel will work anyways, if it is even possible it should be quite 
> a challenge.

The kernel _has_ to have a timing source, it just doesn't have to be an 
RTC. The kernel measures process schedules in jiffies, and uses a 
regular interrupt source for that. The ztdummy module for 2.6 just 
leverages that, it doesn't need an RTC.

In summary: if you have a 2.6 kernel running, you can use ztdummy, 
without worrying about what hardware is in the system. You are right, 
though, it may not yet be possible to run a 2.6 kernel on that hardware.