[PATCH v5 1/2] dt-bindings: counter: add event-counter binding
From: Oleksij Rempel <o.rempel@pengutronix.de>
Date: 2021-02-08 13:58:50
Also in:
linux-iio, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Add binding for the event counter node Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- .../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@pengutronix.de> + +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>; + }; + +...
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2.30.0