Add binding for the event counter node Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> --- .../bindings/counter/event-counter.yaml | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/counter/event-counter.yaml diff --git a/Documentation/devicetree/bindings/counter/event-counter.yaml b/Documentation/devicetree/bindings/counter/event-counter.yaml new file mode 100644 index 000000000000..bd05c1b38f20 --- /dev/null +++ b/Documentation/devicetree/bindings/counter/event-counter.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/counter/event-counter.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Event counter + +maintainers: + - Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> + +description: | + A generic event counter to measure event frequency. It was developed and used + for agricultural devices to measure rotation speed of wheels or other tools. + Since the direction of rotation is not important, only one signal line is + needed. + +properties: + compatible: + const: event-counter + + interrupts: + maxItems: 1 + + gpios: + description: Optional diagnostic interface to measure signal level + maxItems: 1 + +required: + - compatible + +additionalProperties: false + +examples: + - | + + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/gpio/gpio.h> + + counter-0 { + compatible = "event-counter"; + interrupts-extended = <&gpio 0 IRQ_TYPE_EDGE_RISING>; + }; + + counter-1 { + compatible = "event-counter"; + gpios = <&gpio 2 GPIO_ACTIVE_HIGH>; + }; + + counter-2 { + compatible = "event-counter"; + interrupts-extended = <&gpio 2 IRQ_TYPE_EDGE_RISING>; + gpios = <&gpio 2 GPIO_ACTIVE_HIGH>; + }; + +... -- 2.30.0
