[PATCH v3] Add support for SoM "VoCore2".

Mauro Condarelli mc5686 at mclink.it
Mon Jan 27 13:44:17 CET 2020


Update:

On 1/27/20 1:09 PM, Stefan Roese wrote:
> On 27.01.20 12:37, Mauro Condarelli wrote:
>> Unfortunately this still doesn't work as it should.
>>
>> I've been doing more tests and I found out MMC/SD *does*
>> work, but with a ridiculously low throughput (~20KB/s)
>> which is enough to trigger WDT loading uImage.
>>
>> Adding explicit "max-frequency = <48000000>;" to
>> .dts *seems* to cure speed problem, but makes
>> transfer unreliable: relatively small files (<200k)
>> usually work fine, but larger files invariably exit
>> with error:
>>
>> Error reading cluster
>> ** Unable to read file uboot-ram.bin **
>>
>> after which mmc subsystem is unusable (till next reset).
>>
>> @Stefan: do MMC/SD work right on LinkIt/Gardena ?
>>                 apparently neither define mmc section in .dts
>
> I have zero experience with MMC/SD on these platforms as this IF is
> not used on the GARDENA board at all. So sorry, I can't help.
>
> Thanks,
> Stefan
MANY Thanks just the same, Stefan!

===8<----
Apparently it's really a speed problem: changing setting to:
  max-frequency = <24000000>;
*seems* to work right (pending more tests).

I fear I'll have to wait Weijie input on this.
I'll keep this as is now, till further notice.

ANY input very welcome.

Regards
Mauro


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