On Thu, 27 Feb 2020, jasper.low...@bt.com wrote:
I've since looked at a Ultra 5 board and can confirm that it shipped with a CMD646U chip like the Ultra 10.
If you have access to an Ultra 5 maybe you could try testing what it does with irqs. That should give the ultimate answer to our guessing. It may need patching a Linux driver to log more info and recompile the kernel so not sure you have time for that but maybe it would help if you can do it.
Regards, BALATON Zoltan
