Re: [PATCH anybus v3 0/6] Support HMS Profinet Card over Anybus

[Arnd Bergmann]

On Fri, Nov 9, 2018 at 10:47 PM Sven Van Asbroeck <thesven73@xxxxxxxxx> wrote:
>
> On Fri, Nov 9, 2018 at 4:22 PM Arnd Bergmann <arnd@xxxxxxxx> wrote:
> >
> >
> > As usual, it comes down to the user space interfaces I think. Designing
> > a user interface is hard, most importantly because you cannot change it
> > once anyone starts relying on it, as opposed to implementation details
> > that you are free to change at any point.
>
> Thanks for the feedback !
> I will rework v4 so it uses a userspace interface shared with other
> fieldbus drivers - uio.

You mentioned this before, but I don't see how this would actually
work. Isn't uio just a slim wrapper for allowing user space access
to hardware registers while avoiding a kernel driver?

      Arnd