dt-bindings: display: samsung,exynos-mixer: convert to dtschema

Convert the Exynos Mixer bindings to DT schema format.

The conversion includes also updates to the bindings, matching the
current DTS and Linux driver:
1. Add clocks required on Exynos4210 and Exynos4212 types of Mixer.
2. Add second memory range on Exynos4210 and Exynos4212.
3. Add interconnects, iommus and power-domains.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220208171823.226211-8-krzysztof.kozlowski@canonical.com

Documentation/devicetree/bindings/display/exynos/exynos_mixer.txt

-Device-Tree bindings for mixer driver
-
-Required properties:
-- compatible: value should be one of the following:
-	1) "samsung,exynos5-mixer" <DEPRECATED>
-	2) "samsung,exynos4210-mixer"
-	3) "samsung,exynos4212-mixer"
-	4) "samsung,exynos5250-mixer"
-	5) "samsung,exynos5420-mixer"
-
-- reg: physical base address of the mixer and length of memory mapped
-	region.
-- interrupts: interrupt number to the cpu.
-- clocks: list of clock IDs from SoC clock driver.
-	a) mixer: Gate of Mixer IP bus clock.
-	b) sclk_hdmi: HDMI Special clock, one of the two possible inputs of
-               mixer mux.
-	c) hdmi: Gate of HDMI IP bus clock, needed together with sclk_hdmi.
-
-Example:
-
-	mixer {
-		compatible = "samsung,exynos5250-mixer";
-		reg = <0x14450000 0x10000>;
-		interrupts = <0 94 0>;
-	};

Documentation/devicetree/bindings/display/samsung/samsung,exynos-mixer.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/samsung/samsung,exynos-mixer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC Mixer
+
+maintainers:
+  - Inki Dae <inki.dae@samsung.com>
+  - Joonyoung Shim <jy0922.shim@samsung.com>
+  - Seung-Woo Kim <sw0312.kim@samsung.com>
+  - Kyungmin Park <kyungmin.park@samsung.com>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+description:
+  Samsung Exynos SoC Mixer is responsible for mixing and blending multiple data
+  inputs before passing it to an output device.  The output is passed to HDMI.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - samsung,exynos4210-mixer
+          - samsung,exynos4212-mixer
+          - samsung,exynos5250-mixer
+          - samsung,exynos5420-mixer
+      - const: samsung,exynos5-mixer
+        deprecated: true
+
+  clocks:
+    minItems: 3
+    items:
+      - description: Gate of Mixer IP bus clock.
+      - description: Gate of HDMI IP bus clock, needed together with sclk_hdmi.
+      - description: HDMI Special clock, one of the two possible inputs of
+          mixer mux.
+      - description: Video Processor clock.
+      - description: Mixer mux clock.
+      - description: Mixer Special clock.
+
+  clock-names:
+    minItems: 3
+    items:
+      - const: mixer
+      - const: hdmi
+      - const: sclk_hdmi
+      - const: vp
+      - const: mout_mixer
+      - const: sclk_mixer
+
+  interconnects:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  iommus:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  reg:
+    minItems: 1
+    items:
+      - description: Mixer memory region.
+      - description: Video Processor memory region.
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - interrupts
+  - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos4210-mixer
+              - samsung,exynos4212-mixer
+    then:
+      properties:
+        clocks:
+          minItems: 6
+          maxItems: 6
+        regs:
+          minItems: 2
+          maxItems: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos4212-mixer
+    then:
+      properties:
+        clocks:
+          minItems: 4
+          maxItems: 4
+        regs:
+          minItems: 2
+          maxItems: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos5-mixer
+              - samsung,exynos5250-mixer
+              - samsung,exynos5420-mixer
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+        regs:
+          minItems: 1
+          maxItems: 1
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos5250.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    mixer@14450000 {
+        compatible = "samsung,exynos5250-mixer";
+        reg = <0x14450000 0x10000>;
+        interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clock CLK_MIXER>,
+                 <&clock CLK_HDMI>,
+                 <&clock CLK_SCLK_HDMI>;
+        clock-names = "mixer",
+                      "hdmi",
+                      "sclk_hdmi";
+        iommus = <&sysmmu_tv>;
+        power-domains = <&pd_disp1>;
+    };