Subject: Re: [PATCH v3 6/7] mfd: Add support for LAN966x PCI device

From: Herve Codina <[email-masked]>
Date: Tue, 16 Jul 2024 17:58:18 +0200

On Tue, 16 Jul 2024 16:44:12 +0200
"Arnd Bergmann" <[email-masked]> wrote:

> On Mon, Jul 15, 2024, at 14:12, Herve Codina wrote:
> > Hi Arnd,
> >
> > On Fri, 12 Jul 2024 16:14:31 +0200
> > "Arnd Bergmann" <[email-masked]> wrote:
> >  
> >> On Fri, Jul 12, 2024, at 15:11, Herve Codina wrote:  
> >> > On Thu, 11 Jul 2024 14:33:26 -0600 Rob Herring <[email-masked]> wrote:    
> >> >> On Thu, Jul 11, 2024 at 1:08 PM Greg Kroah-Hartman <[email-masked]> wrote:    
> >>   
> >> >> > >
> >> >> > > This PCI driver purpose is to instanciate many other drivers using a DT
> >> >> > > overlay. I think MFD is the right subsystem.      
> >> >> 
> >> >> It is a Multi-function Device, but it doesn't appear to use any of the
> >> >> MFD subsystem. So maybe drivers/soc/? Another dumping ground, but it
> >> >> is a driver for an SoC exposed as a PCI device.
> >> >>     
> >> >
> >> > In drivers/soc, drivers/soc/microchip/ could be the right place.
> >> >
> >> > Conor, are you open to have the PCI LAN966x device driver in
> >> > drivers/soc/microchip/ ?    
> >> 
> >> That sounds like a much worse fit than drivers/mfd: the code
> >> here does not actually run on the lan966x soc, it instead runs
> >> on whatever other machine you happen to plug it into as a
> >> PCI device.  
> >
> > Maybe drivers/misc ?  
> 
> That's probably a little better, and there is already
> drivers/misc/mchp_pci1xxxx in there, which also has some
> aux devices.
> 
> Maybe we need a new place and then move both of these
> and some of the similar devices from drivers/mfd to that, but
> we don't really have to pick one now.
> 

In the next iteration, I plan to move the lan966x pci driver in
drivers/misc/

Not sure that it needs to be in a subdir.

Best regards
Hervé