[Lenny400] Squeeze rootfs and modernising the kernel

Dr. H. Nikolaus Schaller hns at goldelico.com
Tue Mar 31 11:45:24 CEST 2015


Hi,

Am 24.03.2015 um 23:46 schrieb David Boddie <david at boddie.org.uk>:

> I recently acquired a Letux 400 for a fairly specialised project and am
> setting up the base system. All the existing resources work well: the
> extended 2.6.24.3 kernel and Lenny rootfs.
> 
> However, I'm looking to put something a little more modern on it. At the
> moment, I can put a Debian Squeeze rootfs on the SD card instead of a
> Lenny rootfs and this works well enough. Having established that, I'm
> looking into rebuilding the kernel with a version of GCC later than 4.3
> and this is where I run into difficulties.
> 
> I noticed the 3.12-wip-letux400 branch at
> 
>  http://git.goldelico.com/gta04-kernel.git
> 
> and will look into that.

Well, it is just a dummy. No real work has been done to support the Letux 400
in this kernel, but I would be happy to support such a project. Maybe we
could even rebase and jump forward to 4.0-rc6 :)

> Is that likely to be a better approach than
> attempting to merge the changes to the 2.6.24 kernel into a later release?

The problem is that the jz4730 SoC isn’t supported by any official
kernel. Just the jz4740 SoC and they have quite some differences (but also
similarities).

And, the documentation of the jz4730 did exist online but has disappeared
a while ago. So the first step would be to collect as much about the jz4730
SoC as possible.

Maybe you can find copies of http://projects.kwaak.net/twiki/bin/view/Epc700/WebHome
in some wayback machine?

Or someone just reading this list has archived some (or all) documents?

I have uploaded what I had found a while ago:

http://download.goldelico.com/letux-400/files/

The next step could be to extend the mips cpu support for the jz4730 in
the kernel.org arch/mips tree (unfortunately they are not yet on DT like ARM
which would make some things a little easier like formally describing the SoC).

BR,
Nikolaus



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