Re: [PATCH 0/5] Make gpio_keys accept board descriptors

[Linus Walleij <linus.walleij@linaro.org>]

Hi Dmitry,

On Sun, Nov 26, 2017 at 12:33 AM Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
> On Fri, Nov 24, 2017 at 10:30:40AM +0100, Linus Walleij wrote:

> > The goal I'm working toward is to rid the kernel of the global
> > GPIO numberspace.
> >
> > This means GPIO lines should be references by the local offset
> > on the GPIO chip.
> >
> > This patch set starts to move gpio_keys toward using GPIO
> > look-up tables instead of global GPIO numbers to find their
> > GPIOs.
> >
> > As an example I did (I think) the necessary patches to
> > convert DaVinci and i.MX to use this. There are several users
> > also x86 platform devices.
(...)
> I think this is a worthy goal, but I wonder if we could get static GPIO
> descriptors work with fwnode_get_named_gpiod() so we could retire the
> platform data parsing altogether. We'd need to extend static device
> properties to have notion of children though.

Do we have this now? I've looked at Heikki's et al work
on software nodes but I cannot see whether we are there now.

We have fwnode_create_software_node() and friends, but
I haven't seen if this can be used with input and GPIO descriptors
are still a bit on the side. I can create a lot of properties but
not really add a descriptor table as a software node as far as
I can tell. I'm also a bit lost on whether it will be possible
to get there sadly :/

Yours,
Linus Walleij