dts: bindings: gpio: add binding for BD8LB600FS

#

# Copyright (c) 2022 SILA Embedded Solutions GmbH

#

# SPDX-License-Identifier: Apache-2.0

#

description: |

    This is a representation of the Rohm BD8LB600FS SPI Gpio Expander.

compatible: "rohm,bd8lb600fs"

include: [gpio-controller.yaml, spi-device.yaml]

properties:

  "#gpio-cells":

    const: 2

  ngpios:

    type: int

    required: true

    const: 8

    description: Number of gpios supported

  reset-gpios:

    type: phandle-array

    required: true

    description: "GPIO for reset"

gpio-cells:

  - pin

  - flags