linuxppc_2_5 source tree (and others)

Hi, I see that the linuxppc_2_5 bk tree has disappeared from fsmlabs, and
has been replaced with a linuxppc_2_4_devel tree. Could someone in the
know please post a quick update what this means, and perhaps what the
future holds wrt 2.4/2.5 linuxppc (embedded)?

I guess I should actually ask about what I want :-) The linuxppc_2_5 tree
had a "drivers/i2c/i2c-algo-8xx.c" file which has disappeared from 2_4_devel.
I need an i2c driver for linuxppc for the 8260 and figured this would be a
good place to start. So the question really is what has happened to the 8xx
i2c driver in the fsmlabs linuxppc_2_5, and has anyone ported this to (or done
one independently for) the 8260?

And while I am at it, I have searched the archives for info about IDMA
and it appears that it is a do it yourself job (and that it may not be
so good on the 8xx anyway - but from what we can tell, it is much better
on the 8260 - if anyone knows differently, please let me know). If you
have a driver/support code/etc for IDMA on the 8260 (or 8xx) I would
appreciate it very much if you let me know.

Thanks for your time. Cheers!
								Murray...
--
Murray Jensen, CSIRO Manufacturing Sci & Tech,         Phone: +61 3 9662 7763
Locked Bag No. 9, Preston, Vic, 3072, Australia.         Fax: +61 3 9662 7853
Internet: Murray.Jensen@cmst.csiro.au  (old address was mjj@mlb.dmt.csiro.au)


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Murray Jensen wrote:

......Could someone in the
know please post a quick update what this means, and perhaps what the
future holds wrt 2.4/2.5 linuxppc (embedded)?

Tom Rini has done lots of this work, so I'll rely on him to respond.
He is trying to finish up some finals at school, so it may take a day
or so.

I guess I should actually ask about what I want :-) The linuxppc_2_5 tree
had a "drivers/i2c/i2c-algo-8xx.c" file which has disappeared from 2_4_devel.

Right.  Tom is working with the real authors of the I2C software so
we get approval to just check this in all of the way to the main
kernel tree.  I was able to drop it into the _2_5 tree because I
didn't have to ask.  If you still have the _2_5 tree around, just
make a patch to 2.4_devel and keep on going.  It should show up for
real pretty soon.  I have also modified this for the 8260, and I
am going to have to look for it and get that checked in, too :-).
I still think bit-banging software for I2C is faster and more
efficient than using the CPM......at least for single master mode.

And while I am at it, I have searched the archives for info about IDMA
and it appears that it is a do it yourself job

Well, yes...Implicitly, all CPM devices use IDMA, so just copy one
of those and gut it for your own use.  All an IDMA driver would do is
set up buffer descriptors.  All of the device control and buffer
management is unique to the device, so I still can't grok a "generic"
IDMA driver.


	-- Dan

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