On Mon, Mar 01, 2021 at 09:04:00AM +0100, Oleksij Rempel wrote:
> Add binding for the interrupt counter node
> 
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>

> ---
>  .../bindings/counter/interrupt-counter.yaml   | 62 +++++++++++++++++++
>  1 file changed, 62 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/counter/interrupt-counter.yaml
> 
> diff --git a/Documentation/devicetree/bindings/counter/interrupt-counter.yaml b/Documentation/devicetree/bindings/counter/interrupt-counter.yaml
> new file mode 100644
> index 000000000000..fd075d104631
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/counter/interrupt-counter.yaml
> @@ -0,0 +1,62 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/counter/interrupt-counter.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Interrupt counter
> +
> +maintainers:
> +  - Oleksij Rempel <o.rempel@pengutronix.de>
> +
> +description: |
> +  A generic interrupt counter to measure interrupt 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.
> +  Interrupts or gpios are required. If both are defined, the interrupt will
> +  take precedence for counting interrupts.
> +
> +properties:
> +  compatible:
> +    const: interrupt-counter
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  gpios:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +
> +anyOf:
> +  - required: [ interrupts-extended ]
> +  - required: [ interrupts ]
> +  - required: [ gpios ]
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    counter-0 {
> +        compatible = "interrupt-counter";
> +        interrupts-extended = <&gpio 0 IRQ_TYPE_EDGE_RISING>;
> +    };
> +
> +    counter-1 {
> +        compatible = "interrupt-counter";
> +        gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
> +    };
> +
> +    counter-2 {
> +        compatible = "interrupt-counter";
> +        interrupts-extended = <&gpio 2 IRQ_TYPE_EDGE_RISING>;
> +        gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
> +    };
> +
> +...
> -- 
> 2.29.2
>