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

[Joel Stanley]

On Wed, 5 Apr 2023 at 02:07, Jeremy Kerr <jk@codeconstruct.com.au> wrote:
>
> 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 :)

I think the split makes sense. It will help other platforms who have
the designware part add it to their system in the future.

Joe, when you send out the patches again please be sure to use
get_maintianers.pl to send it to the appropriate reviewers. Thanks for
sharing your work!

Cheers,

Joel