dt-bindings: rtc: s3c: Convert S3C/Exynos RTC bindings to json-schema

* Samsung's S3C Real Time Clock controller

Required properties:

- compatible: should be one of the following.

    * "samsung,s3c2410-rtc" - for controllers compatible with s3c2410 rtc.

    * "samsung,s3c2416-rtc" - for controllers compatible with s3c2416 rtc.

    * "samsung,s3c2443-rtc" - for controllers compatible with s3c2443 rtc.

    * "samsung,s3c6410-rtc" - for controllers compatible with s3c6410 rtc.

    * "samsung,exynos3250-rtc" - (deprecated) for controllers compatible with

                                 exynos3250 rtc (use "samsung,s3c6410-rtc").

- reg: physical base address of the controller and length of memory mapped

  region.

- interrupts: Two interrupt numbers to the cpu should be specified. First

  interrupt number is the rtc alarm interrupt and second interrupt number

  is the rtc tick interrupt. The number of cells representing a interrupt

  depends on the parent interrupt controller.

- clocks: Must contain a list of phandle and clock specifier for the rtc

          clock and in the case of a s3c6410 compatible controller, also

          a source clock.

- clock-names: Must contain "rtc" and for a s3c6410 compatible controller,

               a "rtc_src" sorted in the same order as the clocks property.

Example:

	rtc@10070000 {

		compatible = "samsung,s3c6410-rtc";

		reg = <0x10070000 0x100>;

		interrupts = <44 0 45 0>;

		clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;

		clock-names = "rtc", "rtc_src";

	};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/s3c-rtc.yaml#

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

title: Samsung S3C, S5P and Exynos Real Time Clock controller

maintainers:

  - Krzysztof Kozlowski <krzk@kernel.org>

properties:

  compatible:

    oneOf:

      - enum:

          - samsung,s3c2410-rtc

          - samsung,s3c2416-rtc

          - samsung,s3c2443-rtc

          - samsung,s3c6410-rtc

      - const: samsung,exynos3250-rtc

        deprecated: true

  reg:

    maxItems: 1

  clocks:

    description:

      Must contain a list of phandle and clock specifier for the rtc

      clock and in the case of a s3c6410 compatible controller, also

      a source clock.

    minItems: 1

    maxItems: 2

  clock-names:

    description:

      Must contain "rtc" and for a s3c6410 compatible controller

      also "rtc_src".

    minItems: 1

    maxItems: 2

  interrupts:

    description:

      Two interrupt numbers to the cpu should be specified. First

      interrupt number is the rtc alarm interrupt and second interrupt number

      is the rtc tick interrupt. The number of cells representing a interrupt

      depends on the parent interrupt controller.

    minItems: 2

    maxItems: 2

allOf:

  - if:

      properties:

        compatible:

          contains:

            enum:

              - samsung,s3c6410-rtc

              - samsung,exynos3250-rtc

    then:

      properties:

        clocks:

          minItems: 2

          maxItems: 2

        clock-names:

          items:

            - const: rtc

            - const: rtc_src

    else:

      properties:

        clocks:

          minItems: 1

          maxItems: 1

        clock-names:

          items:

            - const: rtc

examples:

  - |

    rtc@10070000 {

      compatible = "samsung,s3c6410-rtc";

      reg = <0x10070000 0x100>;

      interrupts = <0 44 4>, <0 45 4>;

      clocks = <&clock 0>, // CLK_RTC

               <&s2mps11_osc 0>; // S2MPS11_CLK_AP

      clock-names = "rtc", "rtc_src";

    };