[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAK8P3a1zME8G0FjqLaL65F6yYOEuPLJLNs6Mdve7YF=Q2BpU5w@mail.gmail.com>
Date: Fri, 9 Nov 2018 23:32:50 +0100
From: Arnd Bergmann <arnd@...db.de>
To: Sven Van Asbroeck <thesven73@...il.com>
Cc: svendev@...x.com, Rob Herring <robh@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
DTML <devicetree@...r.kernel.org>
Subject: Re: [PATCH anybus v3 0/6] Support HMS Profinet Card over Anybus
On Fri, Nov 9, 2018 at 10:47 PM Sven Van Asbroeck <thesven73@...il.com> wrote:
>
> On Fri, Nov 9, 2018 at 4:22 PM Arnd Bergmann <arnd@...db.de> 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
Powered by blists - more mailing lists