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[ts-7000] Re: usleep < 10 msec

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Subject: [ts-7000] Re: usleep < 10 msec
From: "charliem_1216" <>
Date: Mon, 19 May 2008 12:57:10 -0000
Hi Alex --

--- In  Alexander Clouter <> wrote:
>
> Hi,
> 
> Juerg Lehni <> [20080518 23:27:00 -0000]:
> >
> > Could you tell me which versions of kernel and RT / HRT patches
you managed to get to 
> > work?
> > 
> I'm deeply confused, from what I can tell the ts72xx series has been 
> supported natively on a 2.6.x kernel for some time.  Have a look at 
> arch/arm/mach-ep93xx/ts72xx.c.  Unsure when it arrived but the
copyright 
> states 2006.

There was initial work done by Lennert Buytenhek for the TS-7200 that
worked fairly well.  Not all of it was pushed to mainline.  There were
a number of show-stopper issues if you tried to use vanilla (well,
showstoppers if you didn't know where to look / what to do ...).  From
memory:

* 64M RAM required a discontig mem patch (32M boards were OK)
* Serial UART speed fix
* Fix nF -bit redboot problem
* CF support (and SD of course)
* Machine ID
* NAND partition table layout
* 2k page NAND
* YAFFS2

So there evolved various sets of patches and recipes for 2.6 on the
M/L.  Most stuff, except SD support I think, could be made to work if
you did some hunting, but AFAIK no-one has been pushing fixes up-stream.

Regards, ............ Charlie

> 
> Cheers
> 
> Alex
> 
> > > --- In  "Steffanus Wiedjaja" <steff_jr@> 
> > > wrote:
> > > >
> > > > --- In  "charliem_1216" <charliem_1216@>
> > > > wrote:
> > > > > uS.  I'd be happy to test some other code on 2.6 if it would 
> > > help,
> > > > > but it sounds like you want to stick to 2.4 kernels.
> > > > >
> > > > > Regards, ......... Charlie
> > > > >
> > > > 
> > > > Hi Charlie,
> > > > It's seems you're successfully port 2.6 kernel into 7250, can u
> > > > share how to do that? We will very appreciate.
> > > > 
> > > > best regards,
> > > > steff
> > > >
> > > 
> > > I wrote about the steps I used in:
> > > http://tech.groups.yahoo.com/group/ts-7000/message/5497
> > > But many other people have also written summaries about their 
> > > approaches, which you can find in the archives.
> > > 
> > > Since my post above I have moved to a more recent kernel, and 
> > > started using Ingo's RT and HRT patchset, all without any real 
> > > problems.  Note that my testing is done mostly using EABI and 
> > > NFSroot, and I have not yet put a modern kernel / distro back into 
> > > flash.
> > > 
> > > Regards, ....... Charlie
> > >
> > 
> > 
> > 
> 
> -- 
>  ______________________________
> < A watched clock never boils. >
>  ------------------------------
>         \   ^__^
>          \  (oo)\_______
>             (__)\       )\/\
>                 ||----w |
>                 ||     ||
>



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