Re: [PATCH 00/16] i3c: aspeed: Add I3C support

[Jeremy Kerr]

Hi Joe,

> > > Jeremy, how different is it ? Could we introduce properties or sub
> > > classes, to support both.
> > 
> > The differences (at least from the view of the current Linux driver
> > implementation) are very minor; unless we want to be errata-compatible,
> > you could use the dw driver directly, plus the ast2600-specific global
> > register space.
> > 
> 
> This is my understanding as well from an outside look.
> From a QEMU standpoint I could split off the dwc portion into a
> dwc_i3c model, which the aspeed_i3c portion inherits from. I can do
> that in a v2 if that sounds good with everyone.

I'm not a qemu maintainer, but for the record: I'm fine with the current
approach. I don't have access to any of the non-aspeed dw documentation,
so verifying what should go into the dw model vs. what is
ast2600-specific has been a bit tricky.

If someone needs a non-aspeed dw model, and has a bit of documentation
about the underlying dw hardware, it should be easy enough to split back
out. Maybe just make sure any "known" divergences - like the IBI PEC
behaviour - are well commented.

That said, if you're keen to do the split dw+aspeed models, that's also
good :)

Cheers,


Jeremy