Re: [PATCH] spi: Force the registration of the spidev devices

Greg Kroah-Hartman
2015-05-13T18:16:35Z

On Wed, May 13, 2015 at 06:39:22PM +0100, Mark Brown wrote:
> On Wed, May 13, 2015 at 10:20:28AM -0700, Greg Kroah-Hartman wrote:
> > On Wed, May 13, 2015 at 06:13:00PM +0100, Mark Brown wrote:
>
> > > So, that was my original suggestion too but people were complaining that
> > > this wasn't a generally supported feature and requires specific support
> > > of some kind in the bus (which nobody posted a patch for).
>
> > I don't understand the complaint, it's a very "generally supported
> > feature" and has been there for a very long time for any bus that wants
> > to use it.
>
> So it's not something that just works for all buses and someone would
> need to write a patch (hint, hint - that's one of the big blockers
> here)? It is a bit surprising to me that this would be something that
> the buses would need to cope with individually since for most things the
> matching mechanics are taken care of in the driver core and we're
> explicitly overriding them here.

It should "just work" for all busses, but if you want to add a "new_id"
sysfs file, you need to add the logic for that to your bus. It's the
bind/unbind files in the driver directories.

greg k-h