dt-bindings: net: davinci-mdio: convert bindings to json-schema

TI SoC Davinci/Keystone2 MDIO Controller Device Tree Bindings

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Required properties:

- compatible		: Should be "ti,davinci_mdio"

			  and "ti,keystone_mdio" for Keystone 2 SoCs

			  and "ti,cpsw-mdio" for am335x, am472x, am57xx/dra7, dm814x SoCs

			  and "ti,am4372-mdio" for am472x SoC

- reg			: physical base address and size of the davinci mdio

			  registers map

- bus_freq		: Mdio Bus frequency

Optional properties:

- ti,hwmods		: Must be "davinci_mdio"

Note: "ti,hwmods" field is used to fetch the base address and irq

resources from TI, omap hwmod data base during device registration.

Future plan is to migrate hwmod data base contents into device tree

blob so that, all the required data will be used from device tree dts

file.

Examples:

	mdio: davinci_mdio@4a101000 {

		compatible = "ti,davinci_mdio";

		reg = <0x4A101000 0x1000>;

		bus_freq = <1000000>;

	};

(or)

	mdio: davinci_mdio@4a101000 {

		compatible = "ti,davinci_mdio";

		ti,hwmods = "davinci_mdio";

		bus_freq = <1000000>;

	};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/net/ti,davinci-mdio.yaml#

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

title: TI SoC Davinci/Keystone2 MDIO Controller

maintainers:

  - Grygorii Strashko <grygorii.strashko@ti.com>

description:

  TI SoC Davinci/Keystone2 MDIO Controller

allOf:

  - $ref: "mdio.yaml#"

properties:

  compatible:

    oneOf:

       - const: ti,davinci_mdio

       - items:

         - const: ti,keystone_mdio

         - const: ti,davinci_mdio

       - items:

         - const: ti,cpsw-mdio

         - const: ti,davinci_mdio

       - items:

         - const: ti,am4372-mdio

         - const: ti,cpsw-mdio

         - const: ti,davinci_mdio

  reg:

    maxItems: 1

  bus_freq:

      maximum: 2500000

      description:

        MDIO Bus frequency

  ti,hwmods:

    description: TI hwmod name

    deprecated: true

    allOf:

      - $ref: /schemas/types.yaml#/definitions/string-array

      - items:

          const: davinci_mdio

if:

  properties:

    compatible:

      contains:

        const: ti,davinci_mdio

  required:

    - bus_freq

required:

  - compatible

  - reg

  - "#address-cells"

  - "#size-cells"

examples:

  - |

    davinci_mdio: mdio@4a101000 {

         compatible = "ti,davinci_mdio";

         #address-cells = <1>;

         #size-cells = <0>;

         reg = <0x4a101000 0x1000>;

         bus_freq = <1000000>;

    };