[pkg-fso-maint] Bug#503292: linux-latest-2.6: new dummy images for Samsung S3C-based devices

Luca Capello luca at pca.it
Sat Jun 13 16:08:29 UTC 2009


retitle 503292 linux-latest-2.6: new dummy images for Samsung s3c24xx devices
thanks

Hi there!

Cc:ing the pkg-fso-maint@ mailing list as well as the debian-arm@ one:
please keep cc:ed at least pkg-fso-maint@ (if you do so, no need to cc:
me, I read that list).

FYI, I recently asked for the status of Openmoko support in upstream
Linux kernel:

  http://thread.gmane.org/gmane.comp.handhelds.openmoko.kernel/9955

On Fri, 24 Oct 2008 15:39:05 +0200, Luca Capello wrote:
> For the other kernel flavors these packages are provided by
> linux-latest-2.6: I'm not here to ask for these dummy packages right
> now.  On the contrary, since I'm going to add them to the
> linux-2.6-openmoko source package [4], for $OPENMOKO I'd like to use a
> name which *maybe* will be the same linux-latest-2.6 will provide in
> future (thus avoiding hardcoded package dependencies).
>
> I thought about the -s3c suffix, because both Openmoko models (GTA01,
> Neo 1973 [5] and GTA02, Neo FreeRunner [6]) use a Samsung SoC from the
> S3C family (2410 and 2442, respectively).  Would this be a good option
> in the long term?

I found a more detailed list of the different ARM processors [7],
specifically for the Samsung SoC ones:

  * ARM920T: S3C2410, S3C2440, S3C2442 and S3C2443
  * ARM926EJS: S3C2412, S3C2413, S3C2416 and S3C2450
  * ARM1176EJS: S3C6400 and S3C6410

According to linux/Documentation/arm/Samsung-S3C24XX/Overview.txt:

  The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported
  by the 's3c2410' architecture of ARM Linux. Currently the S3C2410,
  S3C2412, S3C2413, S3C2440, S3C2442 and S3C2443 devices are supported.

Indeed, both GTA01 and GTA02 are supported by the s3c2410 architecture
(linux/arch/arm/mach-s3c2410 and linux/arch/arm/mach-s3c2440), thus I
guess a better suffix would be -s3c2410 (I changed the bug title to
reflect this).

I do not know how much performance we gain with an Openmoko-optimised
kernel.  In this case we can simply use the -openmoko suffix.

As a final note, it seems there are incompatible kernel options for
GTA01 and GTA02 [8], thus maybe a common kernel would never be possible.
I have not tried to build a common kernel for GTA01 and GTA02 yet [9],
nevertheless, my first question stands.

Thx, bye,
Gismo / Luca

> Footnotes: 
> [1] http://lists.linuxtogo.org/pipermail/smartphones-kernel/2008-October/000013.html
> [2] http://wiki.debian.org/Teams/DebianFSO
> [3] http://lists.linuxtogo.org/pipermail/smartphones-kernel/2008-October/000007.html
> [4] http://git.debian.org/?p=pkg-fso/linux-2.6-openmoko.git;a=summary
> [5] http://wiki.openmoko.org/wiki/GTA01
> [6] http://wiki.openmoko.org/wiki/GTA02
[7] http://elinux.org/Processors
[8] http://lists.linuxtogo.org/pipermail/smartphones-userland/2009-April/001400.html
[9] http://lists.linuxtogo.org/pipermail/smartphones-userland/2009-June/001601.html
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