[PATCH] gpio: uclass: Introduce gpio-hog-optional property

[Simon Glass]

Hi,

On Mon, 12 Sept 2022 at 12:48, Fabio Estevam <festevam at gmail.com> wrote:
>
> Hi Nate and Simon,
>
> On Mon, Sep 12, 2022 at 2:55 PM Nate Drude <nate.d at variscite.com> wrote:
> >
> > gpio_hog_probe_all is invoked by init_sequence_r in board_r.c.
> > If device_probe fails for any gpio-hog, boot hangs with the following error:
> >
> > > initcall sequence 00000000fffc8e18 failed at call 000000004023b320 (err=-121)
> > > ### ERROR ### Please RESET the board ###
> >
> > gpio-hog-optional allows the boot sequence to continue if device_probe
> > fails for optional gpio-hog(s).
> >
> > Signed-off-by: Nate Drude <nate.d at variscite.com>
> > ---
> >  doc/device-tree-bindings/gpio/gpio.txt | 1 +
> >  drivers/gpio/gpio-uclass.c             | 4 +++-
> >  2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/doc/device-tree-bindings/gpio/gpio.txt b/doc/device-tree-bindings/gpio/gpio.txt
> > index 1481ed607d..02d296316b 100644
> > --- a/doc/device-tree-bindings/gpio/gpio.txt
> > +++ b/doc/device-tree-bindings/gpio/gpio.txt
> > @@ -189,6 +189,7 @@ gpio-controller's driver probe function.
> >  Each GPIO hog definition is represented as a child node of the GPIO controller.
> >  Required properties:
> >  - gpio-hog:   A property specifying that this child node represents a GPIO hog.
> > +- gpio-hog-optional: A property specifying to continue boot when device_probe fails in gpio_hog_probe_all
>
> gpio-hog-optional property does not exist in Linux.
>
> If this property is introduced then U-Boot and Linux devicetrees will
> not be in sync.
>
> Can this be fixed differently?

Nate, can you send a patch to Linux with the binding update?

Regards,
Simon