ark1668ed-bsp/linux/Documentation/devicetree/bindings/gpio/nxp,lpc3220-gpio.yaml

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpio/nxp,lpc3220-gpio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NXP LPC3220 SoC GPIO controller

maintainers:
  - Animesh Agarwal <animeshagarwal28@gmail.com>

properties:
  compatible:
    const: nxp,lpc3220-gpio

  reg:
    maxItems: 1

  gpio-controller: true

  '#gpio-cells':
    const: 3
    description: |
      1) bank:
        0: GPIO P0
        1: GPIO P1
        2: GPIO P2
        3: GPIO P3
        4: GPI P3
        5: GPO P3
      2) pin number
      3) flags:
        - bit 0 specifies polarity (0 for normal, 1 for inverted)

required:
  - compatible
  - reg
  - gpio-controller
  - '#gpio-cells'

additionalProperties: false

examples:
  - |
    gpio@40028000 {
        compatible = "nxp,lpc3220-gpio";
        reg = <0x40028000 0x1000>;
        gpio-controller;
        #gpio-cells = <3>; /* bank, pin, flags */
    };