Problem booting Overo Tide at 720MHz

Problem booting Overo Tide at 720MHz

[Andre Puschmann]

Hi list,

a couple of days ago I was posting a similar issue where Linux wouldn't
start after u-boot. I am trying to boot a recent kernel using Steve's
omap-3.2 branch on an Overo Tide based board.

A recent checkout doesn't boot and hangs after u-boot hands over to the
kernel. After some digging I figured out that this has something to do
with the OPP settings for running at 720MHz.

After commenting out omap3_opp_enable_720Mhz() in opp3xxx_data.c the
kernel boots fine.

Does this work for all others?

Regards,
Andre

Re: Problem booting Overo Tide at 720MHz

[Steve Sakoman]

On Wed, Dec 28, 2011 at 7:26 AM, Andre Puschmann
<andre.puschmann@tu-ilmenau.de> wrote:
> Hi list,
>
> a couple of days ago I was posting a similar issue where Linux wouldn't
> start after u-boot. I am trying to boot a recent kernel using Steve's
> omap-3.2 branch on an Overo Tide based board.
>
> A recent checkout doesn't boot and hangs after u-boot hands over to the
> kernel. After some digging I figured out that this has something to do
> with the OPP settings for running at 720MHz.
>
> After commenting out omap3_opp_enable_720Mhz() in opp3xxx_data.c the
> kernel boots fine.
>
> Does this work for all others?

Seems to work fine for me.

Give the binary here a try and let me know if it works for you:

http://feeds.sakoman.com/feeds/yocto/images/omap3-multi/current/

If it does then perhaps it is a defconfig issue. If not, then I need
to dig up a Tide to try to reproduce.

Steve

Re: Problem booting Overo Tide at 720MHz

[Andre Puschmann]

On 12/28/2011 06:09 PM, Steve Sakoman wrote:
> On Wed, Dec 28, 2011 at 7:26 AM, Andre Puschmann
> <andre.puschmann@tu-ilmenau.de> wrote:
>> Hi list,
>>
>> a couple of days ago I was posting a similar issue where Linux wouldn't
>> start after u-boot. I am trying to boot a recent kernel using Steve's
>> omap-3.2 branch on an Overo Tide based board.
>>
>> A recent checkout doesn't boot and hangs after u-boot hands over to the
>> kernel. After some digging I figured out that this has something to do
>> with the OPP settings for running at 720MHz.
>>
>> After commenting out omap3_opp_enable_720Mhz() in opp3xxx_data.c the
>> kernel boots fine.
>>
>> Does this work for all others?
> 
> Seems to work fine for me.
> 
> Give the binary here a try and let me know if it works for you:
> 
> http://feeds.sakoman.com/feeds/yocto/images/omap3-multi/current/
> 
> If it does then perhaps it is a defconfig issue. If not, then I need
> to dig up a Tide to try to reproduce.
> 
> Steve

Nope, doesn't work either. The funny thing is that it works for the
omap3-pm branch which has the 720MHz thing included, too. So maybe the
workaround is just hiding something else?

Andre

Re: Problem booting Overo Tide at 720MHz

[Steve Sakoman]

On Wed, Dec 28, 2011 at 9:19 AM, Andre Puschmann
<andre.puschmann@tu-ilmenau.de> wrote:

> Nope, doesn't work either. The funny thing is that it works for the
> omap3-pm branch which has the 720MHz thing included, too. So maybe the
> workaround is just hiding something else?

OK, I'll try to reproduce that.

Could you send me the complete processor version string from the
u-boot banner so that I can try to use precisely the same
processor/version?

Steve

Re: Problem booting Overo Tide at 720MHz

[Andre Puschmann]

On 12/28/2011 06:28 PM, Steve Sakoman wrote:
> Could you send me the complete processor version string from the
> u-boot banner so that I can try to use precisely the same
> processor/version?

Sure, you find the complete u-boot output here [1]. Is 'Die ID' what you
need? Let me know if you need anything else.

Andre


[1] http://pastebin.com/TM109635