gpio: pca9570: Add DT bindings for NXP PCA9570

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/gpio/gpio-pca9570.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: PCA9570 I2C GPO expander

maintainers:

  - Sungbo Eo <mans0n@gorani.run>

properties:

  compatible:

    enum:

      - nxp,pca9570

  reg:

    maxItems: 1

  gpio-controller: true

  '#gpio-cells':

    const: 2

required:

  - compatible

  - reg

  - gpio-controller

  - "#gpio-cells"

additionalProperties: false

examples:

  - |

    i2c0 {

        #address-cells = <1>;

        #size-cells = <0>;

        gpio@24 {

            compatible = "nxp,pca9570";

            reg = <0x24>;

            gpio-controller;

            #gpio-cells = <2>;

        };

    };

...