dt-bindings: gpu: Convert Samsung Image Scaler to dt-schema

* Samsung Exynos Image Scaler

Required properties:

  - compatible : value should be one of the following:

	(a) "samsung,exynos5420-scaler" for Scaler IP in Exynos5420

	(b) "samsung,exynos5433-scaler" for Scaler IP in Exynos5433

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

	  mapped region.

  - interrupts : Interrupt specifier for scaler interrupt, according to format

		 specific to interrupt parent.

  - clocks : Clock specifier for scaler clock, according to generic clock

	     bindings. (See Documentation/devicetree/bindings/clock/exynos*.txt)

  - clock-names : Names of clocks. For exynos scaler, it should be "mscl"

		  on 5420 and "pclk", "aclk" and "aclk_xiu" on 5433.

Example:

	scaler@12800000 {

		compatible = "samsung,exynos5420-scaler";

		reg = <0x12800000 0x1294>;

		interrupts = <0 220 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&clock CLK_MSCL0>;

		clock-names = "mscl";

	};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

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

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

title: Samsung Exynos SoC Image Scaler

maintainers:

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

properties:

  compatible:

    enum:

      - samsung,exynos5420-scaler

      - samsung,exynos5433-scaler

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks: {}

  clock-names: {}

  iommus: {}

  power-domains: {}

if:

  properties:

    compatible:

      contains:

        const: samsung,exynos5420-scaler

then:

  properties:

    clocks:

      items:

        - description: mscl clock

    clock-names:

      items:

        - const: mscl

else:

  properties:

    clocks:

      items:

        - description: pclk clock

        - description: aclk clock

        - description: aclk_xiu clock

    clock-names:

      items:

        - const: pclk

        - const: aclk

        - const: aclk_xiu

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/exynos5420.h>

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

    scaler@12800000 {

        compatible = "samsung,exynos5420-scaler";

        reg = <0x12800000 0x1294>;

        interrupts = <GIC_SPI 220 IRQ_TYPE_LEVEL_HIGH>;

        clocks = <&clock CLK_MSCL0>;

        clock-names = "mscl";

    };

...