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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pps/pps-gpio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: PPS Signal via GPIO
maintainers:
- Fabio Estevam <festevam@gmail.com>
properties:
compatible:
const: pps-gpio
gpios:
description: The GPIO that provides the PPS signal.
maxItems: 1
echo-gpios:
description: The GPIO that provides the PPS ECHO signal.
maxItems: 1
echo-active-ms:
description: Duration in ms of the active portion of the echo pulse.
assert-falling-edge:
description: Indicates a falling edge assert, when present. Rising edge if absent.
type: boolean
required:
- compatible
- gpios
additionalProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
pps {
compatible = "pps-gpio";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pps>;
gpios = <&gpio1 26 GPIO_ACTIVE_HIGH>;
assert-falling-edge;
echo-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
echo-active-ms = <100>;
};
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