Re: Beagleboard xM crashes when being set to 800MHz with smartreflex on linux-omap-3.6-rc6

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2012/10/2 Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>:
> "Maximilian Schwerin" <Maximilian.Schwerin@xxxxxxxxx> writes:
>
>> Hi,
>>
>> I've just built a linux-omap kernel at 3.6-rc6 using omap2plus_defconfig
>> as basis for the kernel config.
>>
>> When I enable smartreflex and switch to 800MHz via
>>
>> echo 1 > /sys/kernel/debug/smartreflex/smartreflex_core/autocomp
>> echo 1 > /sys/kernel/debug/smartreflex/smartreflex_mpu_iva/autocomp
>> cpufreq-set -f 800MHz
>>
>> the board crashes. If I switch to 800MHz and enable smartreflex later
>> nothing happens. This used to work in my 3.3 based kernel.
>
> SmartReflex is kwown to be unstable in mainline and there are several
> errata that still need fixing for it to be stable.
>
> I strongly recommend you simply leave SR disabled.
>
Does it apply to a device always at opp1G ?
Ie if I boot @1GHz and then enable smart reflex, is it ok ?

> Kevin
>
>
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