Re: [RFT PATCH v3] ARM: omap1: enable real software node lookup of GPIOs on Nokia 770

[Bartosz Golaszewski]

On Fri, Mar 27, 2026 at 3:05 PM Aaro Koskinen <aaro.koskinen@xxxxxx> wrote:
>
> Hi,
>
> On Thu, Mar 26, 2026 at 09:57:31AM +0100, Bartosz Golaszewski wrote:
> > On Mon, Mar 16, 2026 at 9:50 AM Bartosz Golaszewski <brgl@xxxxxxxxxx> wrote:
> > > On Fri, Mar 6, 2026 at 1:31 AM Kevin Hilman <khilman@xxxxxxxxxx> wrote:
> > > > Bartosz Golaszewski <brgl@xxxxxxxxxx> writes:
> > > > > On Thu, Feb 12, 2026 at 12:46 PM Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
> > > > >> On Thu, Feb 12, 2026, at 12:25, Bartosz Golaszewski wrote:
> > > > >> > Currently the board file for Nokia 770 creates dummy software nodes not
> > > > >> > attached in any way to the actual GPIO controller devices and uses the
> > > > >> > fact that GPIOLIB matching swnode's name to the GPIO chip's label during
> > > > >> > software node lookup. This behavior is wrong and we want to remove it.
> > > > >> > To that end, we need to first convert all existing users to creating
> > > > >> > actual fwnode links.
> > > > >> >
> > > > >> > Create real software nodes for GPIO controllers on OMAP16xx and
> > > > >> > reference them from the software nodes in the nokia board file.
> > > > >> >
> > > > >> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
> > > > >>
> > > > >> Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
> > > > >
> > > > > Aaro, Janusz: Can you please pick it up for v7.1?
> > > >
> > > > I can take this via the OMAP tree once I have confirmation from
> > > > Aaro/Janusz that they've tested.
> >
> > Hi again! Any chance we could get this queued? Janusz, Aaro: any objections?
>
> Unfortunately the patch doesn't work - 770 just dies silently. This
> means that e.g. CBUS GPIOs are not working as those are needed to keep
> the device powered. I'll try to figure out how to debug this...
>
> A.

Hmm, I'm wondering if there's a race with consumers already requesting
the GPIOs after the controller device is registered but before the
software node is added. I'll send a version with software nodes being
registered first, then passes as firmware nodes to the platform device
API before the device is registered.

Bart