Re: [PATCH 5/5] arm: omap: Proper cleanups for omap_device

Greg Kroah-Hartman
2013-08-07T05:51:11Z

On Tue, Aug 06, 2013 at 03:37:13PM +0200, Alexander Holler wrote:
> Am 06.08.2013 12:14, schrieb Greg Kroah-Hartman:
>
> >> What exactly is a platform device anyway?
> >
> > Originally it was a "something that wasn't connected to a bus, but just
> > had memory-mapped i/o." Like the PS2 keyboard controller.
> >
> > Embedded systems got ahold of this and went to town, and made everything
> > a platform device because they could, and no one was paying attention.
> >
> > Then OF came along and used it as well, and you know the rest...
> >
> > I think we need to get the ACPI and OF people, and me, in a room
> > together at the kernel summit and not let us out until we have this all
> > worked out.
>
> MFD uses platform devices too.

Ugh, I've been avoiding looking at mfd for a long time now, and really
don't want to start now...