Documentation/devicetree/bindings/auxdisplay/gpio-7-segment.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/auxdisplay/gpio-7-segment.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: GPIO based LED segment display

maintainers:
  - Chris Packham <chris.packham@alliedtelesis.co.nz>

properties:
  compatible:
    const: gpio-7-segment

  segment-gpios:
    description: |
      An array of GPIOs one per segment. The first GPIO corresponds to the A
      segment, the seventh GPIO corresponds to the G segment. Some LED blocks
      also have a decimal point which can be specified as an optional eighth
      segment.

               -a-
              |   |
              f   b
              |   |
               -g-
              |   |
              e   c
              |   |
               -d-  dp

    minItems: 7
    maxItems: 8

required:
  - segment-gpios

additionalProperties: false

examples:
  - |

    #include <dt-bindings/gpio/gpio.h>

    led-7seg {
        compatible = "gpio-7-segment";
        segment-gpios = <&gpio 0 GPIO_ACTIVE_LOW>,
                        <&gpio 1 GPIO_ACTIVE_LOW>,
                        <&gpio 2 GPIO_ACTIVE_LOW>,
                        <&gpio 3 GPIO_ACTIVE_LOW>,
                        <&gpio 4 GPIO_ACTIVE_LOW>,
                        <&gpio 5 GPIO_ACTIVE_LOW>,
                        <&gpio 6 GPIO_ACTIVE_LOW>;
    };