On Wed, Aug 26, 2020 at 05:35:43PM +0300, Heikki Krogerus wrote: > On Wed, Aug 26, 2020 at 03:20:14PM +0200, Linus Walleij wrote: > > Hi Dmitry, > > > > On Sun, Nov 26, 2017 at 12:33 AM Dmitry Torokhov > > <dmitry.torokhov@xxxxxxxxx> 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 :/ > > I'm sorry but I'm not completely sure what is this about? Are software > nodes still missing something that would prevent us from for example > using them to describe the GPIO information exactly the same way it is > described in DT? I don't know if that is what we want, but I'm just > trying to understand what is still missing? Dmitry? No, my changes to improve the fwnode handling of references have landed, a while ago, so now I need to refresh the series of patches to gpiolib I was working on around Plumbers time last year. Linus seemed mostly OK with them, so it just a matter of finding time and picking this up again. Thanks. -- Dmitry
