xref: /linux/Documentation/devicetree/bindings/pps/pps-gpio.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/pps/pps-gpio.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: PPS Signal via GPIO
8
9maintainers:
10  - Fabio Estevam <festevam@gmail.com>
11
12properties:
13  compatible:
14    const: pps-gpio
15
16  gpios:
17    description: The GPIO that provides the PPS signal.
18    maxItems: 1
19
20  echo-gpios:
21    description: The GPIO that provides the PPS ECHO signal.
22    maxItems: 1
23
24  echo-active-ms:
25    description: Duration in ms of the active portion of the echo pulse.
26
27  assert-falling-edge:
28    description: Indicates a falling edge assert, when present. Rising edge if absent.
29    type: boolean
30
31required:
32  - compatible
33  - gpios
34
35additionalProperties: false
36
37examples:
38  - |
39      #include <dt-bindings/gpio/gpio.h>
40
41      pps {
42          compatible = "pps-gpio";
43          pinctrl-names = "default";
44          pinctrl-0 = <&pinctrl_pps>;
45          gpios = <&gpio1 26 GPIO_ACTIVE_HIGH>;
46          assert-falling-edge;
47          echo-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
48          echo-active-ms = <100>;
49      };
50