1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/pwm/pwm-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Generic software PWM for modulating GPIOs
8
9 maintainers:
10 - Stefan Wahren <wahrenst@gmx.net>
11
12 allOf:
13 - $ref: pwm.yaml#
14
15 properties:
16 compatible:
17 const: pwm-gpio
18
19 "#pwm-cells":
20 const: 3
21 description:
22 See pwm.yaml in this directory for a description of the cells format.
23 The first cell which represents the PWM instance number must always
24 be zero.
25
26 gpios:
27 description:
28 GPIO to be modulated
29 maxItems: 1
30
31 required:
32 - compatible
33 - "#pwm-cells"
34 - gpios
35
36 additionalProperties: false
37
38 examples:
39 - |
40 #include <dt-bindings/gpio/gpio.h>
41
42 pwm {
43 #pwm-cells = <3>;
44 compatible = "pwm-gpio";
45 gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
46 };
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