dt-bindings: gpu: Convert Samsung 2D Graphics Accelerator to dt-schema

* Samsung 2D Graphics Accelerator

Required properties:

  - compatible : value should be one among the following:

	(a) "samsung,s5pv210-g2d" for G2D IP present in S5PV210 & Exynos4210 SoC

	(b) "samsung,exynos4212-g2d" for G2D IP present in Exynos4x12 SoCs

	(c) "samsung,exynos5250-g2d" for G2D IP present in Exynos5250 SoC

  - reg : Physical base address of the IP registers and length of memory

	  mapped region.

  - interrupts : G2D interrupt number to the CPU.

  - clocks : from common clock binding: handle to G2D clocks.

  - clock-names : names of clocks listed in clocks property, in the same

		  order, depending on SoC type:

		  - for S5PV210 and Exynos4 based SoCs: "fimg2d" and

		    "sclk_fimg2d"

		  - for Exynos5250 SoC: "fimg2d".

Example:

	g2d@12800000 {

		compatible = "samsung,s5pv210-g2d";

		reg = <0x12800000 0x1000>;

		interrupts = <0 89 0>;

		clocks = <&clock 177>, <&clock 277>;

		clock-names = "sclk_fimg2d", "fimg2d";

	};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/gpu/samsung-g2d.yaml#

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

title: Samsung SoC 2D Graphics Accelerator

maintainers:

  - Inki Dae <inki.dae@samsung.com>

properties:

  compatible:

    enum:

      - samsung,s5pv210-g2d    # in S5PV210 & Exynos4210 SoC

      - samsung,exynos4212-g2d # in Exynos4x12 SoCs

      - samsung,exynos5250-g2d

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks: {}

  clock-names: {}

  iommus: {}

  power-domains: {}

if:

  properties:

    compatible:

      contains:

        const: samsung,exynos5250-g2d

then:

  properties:

    clocks:

      items:

        - description: fimg2d clock

    clock-names:

      items:

        - const: fimg2d

else:

  properties:

    clocks:

      items:

        - description: sclk_fimg2d clock

        - description: fimg2d clock

    clock-names:

      items:

        - const: sclk_fimg2d

        - const: fimg2d

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

additionalProperties: false

examples:

  - |

    g2d@12800000 {

        compatible = "samsung,s5pv210-g2d";

        reg = <0x12800000 0x1000>;

        interrupts = <0 89 0>;

        clocks = <&clock 177>, <&clock 277>;

        clock-names = "sclk_fimg2d", "fimg2d";

    };

...