Comment 63 for bug 1931001
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73416ba
(Get the code!)
@Conrad Kostecki: Yeah, I agree with you it's unlikely problem was absent in 4.19 as it was present way before it.
I was in contact with our sales support and they told the Atom C2758 with F-postfix is custom to SuperMicro. Unfortunately they didn't find explicit specification for the SMBus controller on it but they told it's based on the same 22 nm Silvermonth architecture than the Bay Trail. I suppose SMBus IO should be compatible.
Unfortunately public datasheets for Bay Trails seems scarce too but I was able to find something when searching datasheets for the Bay Trail E3825 used in MinnowBoard Max. Following document seems to be available for the registered ark.intel.com user or by search engines:
"Intel Atom ® Processor E3800 Product Family" with Document Number: 538136 and Chapter 33 "PCU – System Management Bus (SMBus)"