63 lines
1.4 KiB
YAML
63 lines
1.4 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/counter/interrupt-counter.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Interrupt counter
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maintainers:
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- Oleksij Rempel <o.rempel@pengutronix.de>
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description: |
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A generic interrupt counter to measure interrupt frequency. It was developed
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and used for agricultural devices to measure rotation speed of wheels or
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other tools. Since the direction of rotation is not important, only one
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signal line is needed.
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Interrupts or gpios are required. If both are defined, the interrupt will
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take precedence for counting interrupts.
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properties:
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compatible:
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const: interrupt-counter
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interrupts:
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maxItems: 1
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gpios:
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maxItems: 1
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required:
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- compatible
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anyOf:
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- required: [ interrupts-extended ]
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- required: [ interrupts ]
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- required: [ gpios ]
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/gpio/gpio.h>
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counter-0 {
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compatible = "interrupt-counter";
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interrupts-extended = <&gpio 0 IRQ_TYPE_EDGE_RISING>;
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};
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counter-1 {
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compatible = "interrupt-counter";
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gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
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};
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counter-2 {
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compatible = "interrupt-counter";
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interrupts-extended = <&gpio 2 IRQ_TYPE_EDGE_RISING>;
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gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
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};
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...
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