dt-bindings: rng: ti,keystone-rng: convert TI Keystone RNG to dtschema

Keystone SoC Hardware Random Number Generator(HWRNG) Module

On Keystone SoCs HWRNG module is a submodule of the Security Accelerator.

- compatible: should be "ti,keystone-rng"

- ti,syscon-sa-cfg: phandle to syscon node of the SA configuration registers.

		    This registers are shared between hwrng and crypto drivers.

- clocks: phandle to the reference clocks for the subsystem

- clock-names: functional clock name. Should be set to "fck"

- reg: HWRNG module register space

Example:

/* K2HK */

rng@24000 {

	compatible = "ti,keystone-rng";

	ti,syscon-sa-cfg = <&sa_config>;

	clocks = <&clksa>;

	clock-names = "fck";

	reg = <0x24000 0x1000>;

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/rng/ti,keystone-rng.yaml#

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

title: Keystone SoC Hardware Random Number Generator

maintainers:

  - Nishanth Menon <nm@ti.com>

  - Santosh Shilimkar <ssantosh@kernel.org>

properties:

  compatible:

    const: ti,keystone-rng

  clocks:

    maxItems: 1

  clock-names:

    items:

      - const: fck

  reg:

    maxItems: 1

  ti,syscon-sa-cfg:

    $ref: "/schemas/types.yaml#/definitions/phandle"

    description: |

      Phandle to syscon node of the SA configuration registers.  These

      registers are shared between HWRNG and crypto drivers.

required:

  - compatible

  - clocks

  - clock-names

  - reg

  - ti,syscon-sa-cfg

additionalProperties: false

examples:

  - |

    rng@24000 {

        compatible = "ti,keystone-rng";

        ti,syscon-sa-cfg = <&sa_config>;

        clocks = <&clksa>;

        clock-names = "fck";

        reg = <0x24000 0x1000>;

    };