xref: /freebsd/sys/contrib/device-tree/Bindings/pwm/pwm-gpio.yaml (revision 0e8011faf58b743cc652e3b2ad0f7671227610df)
1*0e8011faSEmmanuel Vadot# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2*0e8011faSEmmanuel Vadot%YAML 1.2
3*0e8011faSEmmanuel Vadot---
4*0e8011faSEmmanuel Vadot$id: http://devicetree.org/schemas/pwm/pwm-gpio.yaml#
5*0e8011faSEmmanuel Vadot$schema: http://devicetree.org/meta-schemas/core.yaml#
6*0e8011faSEmmanuel Vadot
7*0e8011faSEmmanuel Vadottitle: Generic software PWM for modulating GPIOs
8*0e8011faSEmmanuel Vadot
9*0e8011faSEmmanuel Vadotmaintainers:
10*0e8011faSEmmanuel Vadot  - Stefan Wahren <wahrenst@gmx.net>
11*0e8011faSEmmanuel Vadot
12*0e8011faSEmmanuel VadotallOf:
13*0e8011faSEmmanuel Vadot  - $ref: pwm.yaml#
14*0e8011faSEmmanuel Vadot
15*0e8011faSEmmanuel Vadotproperties:
16*0e8011faSEmmanuel Vadot  compatible:
17*0e8011faSEmmanuel Vadot    const: pwm-gpio
18*0e8011faSEmmanuel Vadot
19*0e8011faSEmmanuel Vadot  "#pwm-cells":
20*0e8011faSEmmanuel Vadot    const: 3
21*0e8011faSEmmanuel Vadot    description:
22*0e8011faSEmmanuel Vadot      See pwm.yaml in this directory for a description of the cells format.
23*0e8011faSEmmanuel Vadot      The first cell which represents the PWM instance number must always
24*0e8011faSEmmanuel Vadot      be zero.
25*0e8011faSEmmanuel Vadot
26*0e8011faSEmmanuel Vadot  gpios:
27*0e8011faSEmmanuel Vadot    description:
28*0e8011faSEmmanuel Vadot      GPIO to be modulated
29*0e8011faSEmmanuel Vadot    maxItems: 1
30*0e8011faSEmmanuel Vadot
31*0e8011faSEmmanuel Vadotrequired:
32*0e8011faSEmmanuel Vadot  - compatible
33*0e8011faSEmmanuel Vadot  - "#pwm-cells"
34*0e8011faSEmmanuel Vadot  - gpios
35*0e8011faSEmmanuel Vadot
36*0e8011faSEmmanuel VadotadditionalProperties: false
37*0e8011faSEmmanuel Vadot
38*0e8011faSEmmanuel Vadotexamples:
39*0e8011faSEmmanuel Vadot  - |
40*0e8011faSEmmanuel Vadot    #include <dt-bindings/gpio/gpio.h>
41*0e8011faSEmmanuel Vadot
42*0e8011faSEmmanuel Vadot    pwm {
43*0e8011faSEmmanuel Vadot        #pwm-cells = <3>;
44*0e8011faSEmmanuel Vadot        compatible = "pwm-gpio";
45*0e8011faSEmmanuel Vadot        gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
46*0e8011faSEmmanuel Vadot    };
47