dts/bindings/gpio/gpio-controller.yaml

# Copyright (c) 2019, Linaro Limited
# SPDX-License-Identifier: Apache-2.0

# Common fields for GPIO controllers

properties:
    "gpio-controller":
      type: boolean
      required: true
      description: Convey's this node is a GPIO controller
    "#gpio-cells":
      type: int
      required: true
      description: Number of items to expect in a GPIO specifier
    ngpios:
      type: int
      required: false
      default: 32
      description: Number of gpios supported