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
7 title: PPS Signal via GPIO
8
9 maintainers:
10 - Fabio Estevam <festevam@gmail.com>
11
12 properties:
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
31 required:
32 - compatible
33 - gpios
34
35 additionalProperties: false
36
37 examples:
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 };
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