dt-bindings: timer: renesas: ostm: Convert to json-schema

* Renesas OS Timer (OSTM)

The OSTM is a multi-channel 32-bit timer/counter with fixed clock

source that can operate in either interval count down timer or free-running

compare match mode.

Channels are independent from each other.

Required Properties:

  - compatible: must be one or more of the following:

    - "renesas,r7s72100-ostm" for the R7S72100 (RZ/A1) OSTM

    - "renesas,r7s9210-ostm" for the R7S9210 (RZ/A2) OSTM

    - "renesas,ostm" for any OSTM

		This is a fallback for the above renesas,*-ostm entries

  - reg: base address and length of the register block for a timer channel.

  - interrupts: interrupt specifier for the timer channel.

  - clocks: clock specifier for the timer channel.

Example: R7S72100 (RZ/A1H) OSTM node

	ostm0: timer@fcfec000 {

		compatible = "renesas,r7s72100-ostm", "renesas,ostm";

		reg = <0xfcfec000 0x30>;

		interrupts = <GIC_SPI 102 IRQ_TYPE_EDGE_RISING>;

		clocks = <&mstp5_clks R7S72100_CLK_OSTM0>;

		power-domains = <&cpg_clocks>;

	};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/timer/renesas,ostm.yaml#

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

title: Renesas OS Timer (OSTM)

maintainers:

  - Chris Brandt <chris.brandt@renesas.com>

  - Geert Uytterhoeven <geert+renesas@glider.be>

description:

  The OSTM is a multi-channel 32-bit timer/counter with fixed clock source that

  can operate in either interval count down timer or free-running compare match

  mode.

  Channels are independent from each other.

properties:

  compatible:

    items:

      - enum:

          - renesas,r7s72100-ostm # RZ/A1H

          - renesas,r7s9210-ostm  # RZ/A2M

      - const: renesas,ostm       # Generic

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 1

  power-domains:

    maxItems: 1

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - power-domains

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/r7s72100-clock.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    ostm0: timer@fcfec000 {

            compatible = "renesas,r7s72100-ostm", "renesas,ostm";

            reg = <0xfcfec000 0x30>;

            interrupts = <GIC_SPI 102 IRQ_TYPE_EDGE_RISING>;

            clocks = <&mstp5_clks R7S72100_CLK_OSTM0>;

            power-domains = <&cpg_clocks>;

    };