On Thu, Oct 01, 2020 at 05:51:37PM +0100, Mark Brown wrote: > On Thu, Oct 01, 2020 at 11:20:39AM -0500, Pierre-Louis Bossart wrote: > > > I have nothing against MFD, but if this boils down to platform devices we > > are back to the initial open "are platform devices suitable as children of > > PCI devices"? I've heard Greg say no for the last year and a half - and he > > just re-stated this earlier in this thread. > > As you'll have seen from this thread and the prior version (which was > the first time I became aware of this stuff) I'm not clear how that > desire maps on to hardware, as soon as subdevices start needing to get > regions and interrupts mapped then we're going to end up reinventing > resources and regmaps AFAICT. I think the truth is MFD and anciallary bus are solving almost the same problem and could meet in the middle at some point. Since Greg has completely NAK'd using pci_device inside MFD it looks like this is the preference. If people have a use case for regmaps/IRQs then they should add them here. Right now the places I know of don't need this. The target for this is queue-based devices where the sharing granule is a queue. The actual thing being shared to the subsystem from the PCI driver basically the ability to create a queue. Jason
