Documentation/devicetree/bindings/pwm/pwm-gpio.yaml

   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     };