dt-bindings: timer: Convert i.MX GPT to json-schema

Freescale i.MX General Purpose Timer (GPT)

Required properties:

- compatible : should be one of following:

  for i.MX1:

  - "fsl,imx1-gpt";

  for i.MX21:

  - "fsl,imx21-gpt";

  for i.MX27:

  - "fsl,imx27-gpt", "fsl,imx21-gpt";

  for i.MX31:

  - "fsl,imx31-gpt";

  for i.MX25:

  - "fsl,imx25-gpt", "fsl,imx31-gpt";

  for i.MX50:

  - "fsl,imx50-gpt", "fsl,imx31-gpt";

  for i.MX51:

  - "fsl,imx51-gpt", "fsl,imx31-gpt";

  for i.MX53:

  - "fsl,imx53-gpt", "fsl,imx31-gpt";

  for i.MX6Q:

  - "fsl,imx6q-gpt", "fsl,imx31-gpt";

  for i.MX6DL:

  - "fsl,imx6dl-gpt";

  for i.MX6SL:

  - "fsl,imx6sl-gpt", "fsl,imx6dl-gpt";

  for i.MX6SX:

  - "fsl,imx6sx-gpt", "fsl,imx6dl-gpt";

- reg : specifies base physical address and size of the registers.

- interrupts : should be the gpt interrupt.

- clocks : the clocks provided by the SoC to drive the timer, must contain

           an entry for each entry in clock-names.

- clock-names : must include "ipg" entry first, then "per" entry.

Example:

gpt1: timer@10003000 {

	compatible = "fsl,imx27-gpt", "fsl,imx21-gpt";

	reg = <0x10003000 0x1000>;

	interrupts = <26>;

	clocks = <&clks IMX27_CLK_GPT1_IPG_GATE>,

		 <&clks IMX27_CLK_PER1_GATE>;

	clock-names = "ipg", "per";

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/timer/fsl,imxgpt.yaml#

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

title: Freescale i.MX General Purpose Timer (GPT)

maintainers:

  - Sascha Hauer <s.hauer@pengutronix.de>

properties:

  compatible:

    oneOf:

      - const: fsl,imx1-gpt

      - const: fsl,imx21-gpt

      - items:

          - const: fsl,imx27-gpt

          - const: fsl,imx21-gpt

      - const: fsl,imx31-gpt

      - items:

          - enum:

            - fsl,imx25-gpt

            - fsl,imx50-gpt

            - fsl,imx51-gpt

            - fsl,imx53-gpt

            - fsl,imx6q-gpt

          - const: fsl,imx31-gpt

      - const: fsl,imx6dl-gpt

      - items:

          - enum:

            - fsl,imx6sl-gpt

            - fsl,imx6sx-gpt

          - const: fsl,imx6dl-gpt

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    items:

      - description: SoC GPT ipg clock

      - description: SoC GPT per clock

  clock-names:

    items:

      - const: ipg

      - const: per

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/imx27-clock.h>

    timer@10003000 {

        compatible = "fsl,imx27-gpt", "fsl,imx21-gpt";

        reg = <0x10003000 0x1000>;

        interrupts = <26>;

        clocks = <&clks IMX27_CLK_GPT1_IPG_GATE>,

                 <&clks IMX27_CLK_PER1_GATE>;

        clock-names = "ipg", "per";

    };