Messages in this thread | | | Date | Tue, 06 Jun 2006 16:48:44 +0200 | From | Heiko Gerstung <> | Subject | Re: Backport of a 2.6.x USB driver to 2.4.32 - help needed |
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Hi, Lennart:
Lennart Sorensen wrote: > On Tue, Jun 06, 2006 at 01:41:02PM +0200, Heiko Gerstung wrote: >> Yes, but unfortunately I have no chance to do this and therefore I rely >> on others to do this. Well, the same applies to [me] and [kernel >> drivers], but I hoped that it might be easier to try and backport one >> driver instead of trying to improve other people's code (maybe that is >> what OPC stands for :-)), especially when this code has a much larger >> impact on several parts of the kernel. > > Which part of PPS doesn't work on 2.6 if you have the PPS-kit-light > installed? There is a version for 2.6.15 around, which applies to > 2.6.16 with minimal fixing. Only problem I found so far with the code > was that it breaks the serial console on my system, but that was easy to > fix. I still have to test it though since my serial port has the CD > line stuck high at the moment until I can get the board fixed, so > testing is a bit tricky. > > I know I have run a gps receiver with PPS on the CD line under 2.6.8 > using PPS-kit-light, and it worked rather well.
It works but on my system it takes ~4 hours before I reach lower microsecond offsets, where the 2.4 ppskit is below 10 microseconds after four polling cycles. I already tried to fix that but the internal kernel pps discipline is not working as good as it did with the 2.4 ppskit versions.
> > Len Sorensen
Kind regards, Heiko
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