[meta-ti] poor performance of OpenEmbedded on, BeagleBoneBlack compared to Debian

[Robert Nelson]

> Robert, Peter,
>
> So, after some internal discussion, here's an update:
>
> 1. In TI kernel we do dynamic opp setting based on eFuse check in the file
> arch/arm/mach-omap2/opp33xx_data.c
>
> 2. Since most of our EVMs and EVM-SKs use 2.1 Si, everything works properly
> with eFuse check and dynamic opp setting.
>
> 3. But eFuse was not available in 2.0 rev of silicon, only in 2.1 rev. There
> were many BBB boards made with 2.0 Si that were binned to run at 1GHz. And
> older 1.0 Si revs were not 1GHz capable. Currently checking with HW and
> marketing teams if all/most 2.0 chips are safe to run at 1GHz... As w/o eFuse
> there's no way to determine if the chip is 1GHz capable or not.
>
> 4. If your BBB board has 2.1 Si rev, then you should get 1GHz automatically.
> We'll try to figure something out for 2.0 Si boards, but setting opps
> statically in dts is considered incorrect and risky...

Thanks Denys!!!

I'll take look at my bbb collection, i have a few of the "beta" bbb's
which have the earliest non-production silicon, so i can find out what
rev we started with.

BTW, since we at bb.org, are moving to this 3.14 ti base, i'll be
patching this for 1Ghz operation. ;)

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/