Beagleboard B6 woes

Beagleboard B6 woes

[Mikko Rapeli]

Hello,

I'd like to test out newer kernel on a Beagleboard B6 but latest
trees from Linus, linux-omap and linux-omap/for-next seem to be failing at
early boot [1] with omap3_beagle_defconfig.

Some bisecting shows that ARM_UNWIND broke something in the defconfig since
kernels before adf8b37bafc1495393201a2ae4235846371870d0 "[ARM] 5386/2:
unwind: Add Makefile and Kconfig entries for ARM stack unwinding" work.

On the other hand, setting ARM_UNWIND to n which falls back to FRAME_POINTERs
work until 84e250ffa76dddc1bad84e04248a27f442c25986 "musb: proper hookup to 
transceiver drivers".

So, is this just a broken config thing? Does anyone have a working
Beagleboard config for linux-2.6 or linux-omap trees?

Thanks,

-Mikko

[1] early boot failing example on Beagleboard:

## Booting kernel from Legacy Image at 80300000 ...
   Image Name:   Linux-2.6.31-rc8-00021-g36d568e-
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1760556 Bytes =  1.7 MB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux.............................................................

Re: Beagleboard B6 woes

[Jon Hunter]

Mikko Rapeli wrote:
> Hello,
> 
> I'd like to test out newer kernel on a Beagleboard B6 but latest
> trees from Linus, linux-omap and linux-omap/for-next seem to be failing at
> early boot [1] with omap3_beagle_defconfig.
> 
> Some bisecting shows that ARM_UNWIND broke something in the defconfig since
> kernels before adf8b37bafc1495393201a2ae4235846371870d0 "[ARM] 5386/2:
> unwind: Add Makefile and Kconfig entries for ARM stack unwinding" work.

If UNWIND is breaking it, then the most likely cause is that you are 
using an older toolchain, such as code-sourcery 2007q3. If you are using 
  2007q3, upgrade to a 2008 or 2009 release. More details here:

http://marc.info/?l=linux-omap&m=124175324604568&w=2

> On the other hand, setting ARM_UNWIND to n which falls back to FRAME_POINTERs
> work until 84e250ffa76dddc1bad84e04248a27f442c25986 "musb: proper hookup to 
> transceiver drivers".

You could trying enabling "CONFIG_TWL4030_USB" to see if this helps.

Jon

Re: Beagleboard B6 woes

[Mikko Rapeli]

On Mon, Aug 31, 2009 at 11:24:58AM -0500, Jon Hunter wrote:
> If UNWIND is breaking it, then the most likely cause is that you are  
> using an older toolchain, such as code-sourcery 2007q3. If you are using  
>  2007q3, upgrade to a 2008 or 2009 release. More details here:
>
> http://marc.info/?l=linux-omap&m=124175324604568&w=2

I'm using Maemo SDK so cs2007q3-glibc2.5-arm7 it is. I'll give newer tool
chains a try.

>> On the other hand, setting ARM_UNWIND to n which falls back to FRAME_POINTERs
>> work until 84e250ffa76dddc1bad84e04248a27f442c25986 "musb: proper 
>> hookup to transceiver drivers".
>
> You could trying enabling "CONFIG_TWL4030_USB" to see if this helps.

This is already set and doesn't help.

Well, at least v2.6.29-omap1 from linux-omap tree works on my Beagle.

Thanks.

-Mikko