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