Need stable 2.6 kernel for TQM823L

Need stable 2.6 kernel for TQM823L

[Thomas Maenner]

Hi Guys,

I have used the 2.4 kernel successfully on the TQM823L and 855s, and wanted to 
try out a 2.6 version. So I downloaded the latest from Wolfgang @ git.denx.de 
but I'm getting all sorts of compile errors....

Before I continue to dive in, I wanted to ask the group some questions:
- Is 2.6 ported to the TQM8xx modules?
- If so, is it stable?
- If so, where can I download the sources?

Thanks much
Tom

-- 
Linux hackers are funny people: They count the time in patchlevels
--
Thomas Maenner
E-Mail: mailto:tmaenner@aehr.com

Re: Need stable 2.6 kernel for TQM823L

[Grant Likely]

On Wed, Jul 02, 2008 at 02:18:13PM -0700, Thomas Maenner wrote:
> Hi Guys,
> 
> I have used the 2.4 kernel successfully on the TQM823L and 855s, and wanted to 
> try out a 2.6 version. So I downloaded the latest from Wolfgang @ git.denx.de 
> but I'm getting all sorts of compile errors....
> 
> Before I continue to dive in, I wanted to ask the group some questions:
> - Is 2.6 ported to the TQM8xx modules?

$ ls arch/powerpc/boot/dts/tqm*
arch/powerpc/boot/dts/tqm5200.dts  arch/powerpc/boot/dts/tqm8555.dts
arch/powerpc/boot/dts/tqm8540.dts  arch/powerpc/boot/dts/tqm8560.dts
arch/powerpc/boot/dts/tqm8541.dts

Unfortunately, it doesn't look like any of the tqm8xx boards have been
added to the device tree directory, so the answer is probably, 'no'.

> - If so, is it stable?

I believe 8xx support is stable in arch/powerpc, but you'll need to
write a device tree file for the board.  Look for a similar board in
arch/powerpc/boot/dts/ to use as a starting point.

You'll probably also need to add a platform file to arch/powerpc/platforms/8xx
that matches against your new device tree file.

g.

Re: Need stable 2.6 kernel for TQM823L

[Thomas Maenner]

Thanks much Grant,

On Wednesday 02 July 2008 22:58:19 Grant Likely wrote:
> On Wed, Jul 02, 2008 at 02:18:13PM -0700, Thomas Maenner wrote:
> > Hi Guys,
> >
> > I have used the 2.4 kernel successfully on the TQM823L and 855s, and
> > wanted to try out a 2.6 version. So I downloaded the latest from Wolfgang
> > @ git.denx.de but I'm getting all sorts of compile errors....
> >
> > Before I continue to dive in, I wanted to ask the group some questions:
> > - Is 2.6 ported to the TQM8xx modules?
>
> $ ls arch/powerpc/boot/dts/tqm*
> arch/powerpc/boot/dts/tqm5200.dts  arch/powerpc/boot/dts/tqm8555.dts
> arch/powerpc/boot/dts/tqm8540.dts  arch/powerpc/boot/dts/tqm8560.dts
> arch/powerpc/boot/dts/tqm8541.dts
>
however, I found config files in the ppc tree:
ls arch/ppc/configs/TQM8*
arch/ppc/configs/TQM823L_defconfig  
arch/ppc/configs/TQM850L_defconfig
arch/ppc/configs/TQM8260_defconfig 
arch/ppc/configs/TQM860L_defconfig

Is this stuff still working?
Do I still need to create a device tree?

Thanks again

Tom

> Unfortunately, it doesn't look like any of the tqm8xx boards have been
> added to the device tree directory, so the answer is probably, 'no'.
>
> > - If so, is it stable?
>
> I believe 8xx support is stable in arch/powerpc, but you'll need to
> write a device tree file for the board.  Look for a similar board in
> arch/powerpc/boot/dts/ to use as a starting point.
>
> You'll probably also need to add a platform file to
> arch/powerpc/platforms/8xx that matches against your new device tree file.
>
> g.


-- 
Linux hackers are funny people: They count the time in patchlevels
--
Thomas Maenner
E-Mail: mailto:tmaenner@aehr.com

Re: Need stable 2.6 kernel for TQM823L

[Grant Likely]

On Thu, Jul 03, 2008 at 11:59:29AM -0700, Thomas Maenner wrote:
> > $ ls arch/powerpc/boot/dts/tqm*
> > arch/powerpc/boot/dts/tqm5200.dts  arch/powerpc/boot/dts/tqm8555.dts
> > arch/powerpc/boot/dts/tqm8540.dts  arch/powerpc/boot/dts/tqm8560.dts
> > arch/powerpc/boot/dts/tqm8541.dts
> >
> however, I found config files in the ppc tree:
> ls arch/ppc/configs/TQM8*
> arch/ppc/configs/TQM823L_defconfig  
> arch/ppc/configs/TQM850L_defconfig
> arch/ppc/configs/TQM8260_defconfig 
> arch/ppc/configs/TQM860L_defconfig
> 
> Is this stuff still working?
> Do I still need to create a device tree?

arch/ppc is depreciated and will disappear in 2.6.27.  I don't know if
anyone is actively keeping 8xx support working in arch/ppc so you may
experience significant breakage.

g.

Re: Need stable 2.6 kernel for TQM823L

[Thomas Maenner]

On Thursday 03 July 2008 12:04:40 Grant Likely wrote:
> On Thu, Jul 03, 2008 at 11:59:29AM -0700, Thomas Maenner wrote:
> > > $ ls arch/powerpc/boot/dts/tqm*
> > > arch/powerpc/boot/dts/tqm5200.dts  arch/powerpc/boot/dts/tqm8555.dts
> > > arch/powerpc/boot/dts/tqm8540.dts  arch/powerpc/boot/dts/tqm8560.dts
> > > arch/powerpc/boot/dts/tqm8541.dts
> >
> > however, I found config files in the ppc tree:
> > ls arch/ppc/configs/TQM8*
> > arch/ppc/configs/TQM823L_defconfig
> > arch/ppc/configs/TQM850L_defconfig
> > arch/ppc/configs/TQM8260_defconfig
> > arch/ppc/configs/TQM860L_defconfig
> >
> > Is this stuff still working?
> > Do I still need to create a device tree?
>
> arch/ppc is depreciated and will disappear in 2.6.27.  I don't know if
> anyone is actively keeping 8xx support working in arch/ppc so you may
> experience significant breakage.
>
> g.

Not exactly what I was hoping to hear...

What are the reasons to not port these TQs to 2.6?
Lack of resources? Not enough interest?

Thanks again
Tom

-- 
Linux hackers are funny people: They count the time in patchlevels
--
Thomas Maenner
E-Mail: mailto:tmaenner@aehr.com

Re: Need stable 2.6 kernel for TQM823L

[Stefan Roese]

Hi Tom,

On Friday 04 July 2008, Thomas Maenner wrote:
> > arch/ppc is depreciated and will disappear in 2.6.27.  I don't know if
> > anyone is actively keeping 8xx support working in arch/ppc so you may
> > experience significant breakage.
> >
> > g.
>
> Not exactly what I was hoping to hear...
>
> What are the reasons to not port these TQs to 2.6?
> Lack of resources? Not enough interest?

We (DENX) have been maintaining those TQM8xx boards (U-Boot & Linux). But till 
now nobody asked us to port these over to arch/powerpc. You may understand 
that we won't do this "just for fun". If you are interested in an 
arch/powerpc port for these boards, we could do this of course. Please 
contact me off list if you are interested in such a project.

Thanks.

Best regards,
Stefan

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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office@denx.de
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Re: Need stable 2.6 kernel for TQM823L

[Jochen Friedrich]

Hi Tom,

> Not exactly what I was hoping to hear...
> 
> What are the reasons to not port these TQs to 2.6?
> Lack of resources? Not enough interest?

It's probably not enough interest.

However, the port should be fairly easy. Some time ago, I posted a
port for the Dbox2 hardware, which is also based on the MPC823 CPU.
You can use this as a starting point just by ripping off the DBox2
specific parts (you'd have to convert the device tree to v1 though):

http://patchwork.ozlabs.org/linuxppc/patch?person=1023&id=15875

Thanks,
Jochen

Re: Need stable 2.6 kernel for TQM823L

[Thomas Maenner]

Thanks guys for the info and pointers.
(Sorry for the late reply - Was on vacation)

-- 
Linux hackers are funny people: They count the time in patchlevels
--
Thomas Maenner
E-Mail: mailto:tmaenner@aehr.com