The Wiegand GPIO driver uses two GPIO lines to transmit data - data-hi and data-lo. These lines need to be defined in the devicetree, otherwise the driver will not probe successfully. Signed-off-by: Martin Zaťovič <m.zatovic1@xxxxxxxxx> --- .../bindings/gpio/gpio-wiegand.yaml | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-wiegand.yaml diff --git a/Documentation/devicetree/bindings/gpio/gpio-wiegand.yaml b/Documentation/devicetree/bindings/gpio/gpio-wiegand.yaml new file mode 100644 index 000000000000..3b235667ae17 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-wiegand.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/gpio-wiegand.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Wiegand GPIO controller + +description: | + Wiegand GPIO controller running under Wiegand bus. + +maintainers: + - Martin Zaťovič <m.zatovic1@xxxxxxxxx> + +properties: + $nodename: + pattern: "^wiegand-gpio@[0-9a-f]+$" + + compatible: + const: wiegand,wiegand-gpio + + data-hi-gpios: + description: GPIO spec for data-hi line to use + maxItems: 1 + + data-lo-gpios: + description: GPIO spec for data-lo line to use + maxItems: 1 + +required: + - compatible + - data-hi-gpios + - data-lo-gpios + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + wiegand { + compatible = "wiegand"; + + wiegand-gpio { + compatible = "wiegand,wiegand-gpio"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2_wiegand>; + data-hi-gpios = <&gpio2 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + data-lo-gpios = <&gpio2 6 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + }; + }; + +... -- 2.37.3
