On Thu, Aug 24, 2023 at 01:10:14PM +0200, Martin Zaťovič wrote: > GPIO bitbanged Wiegand controller requires definitions of GPIO lines to be > used on top of the common Wiegand properties. Wiegand utilizes two such > lines - DATA0(low data line) and DATA1(high data line). > > Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx> > Signed-off-by: Martin Zaťovič <m.zatovic1@xxxxxxxxx> > --- > .../bindings/wiegand/wiegand-gpio.yaml | 46 +++++++++++++++++++ > MAINTAINERS | 5 ++ > 2 files changed, 51 insertions(+) > create mode 100644 Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml > > diff --git a/Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml b/Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml > new file mode 100644 > index 000000000000..cf2cb938de02 > --- /dev/null > +++ b/Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml > @@ -0,0 +1,46 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/wiegand/wiegand-gpio.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: GPIO bitbanged Wiegand interface properties > + > +maintainers: > + - Martin Zaťovič <m.zatovic1@xxxxxxxxx> > + > +description: > + This represents the GPIO lines used for bit-banged Wiegand on dedicated GPIO > + lines. > + > +allOf: > + - $ref: /schemas/wiegand/wiegand-controller.yaml# > + > +properties: > + compatible: > + const: wiegand-gpio > + > + data-gpios: > + description: GPIOs used as Wiegand data lines, DATA0 and DATA1 respectivelly. > + maxItems: 2 > + > +required: > + - compatible > + - data-gpios > + > +unevaluatedProperties: false You'll find this fails if you add an actual child node. Assuming you go with only 1 child node allowed, then you need: unevaluatedProperties: type: object (There's not any way to say only 1 child, but multiple would have constraints in the common binding as I explained.) Rob
