dt-bindings: display: samsung,exynos7-decon: convert to dtschema

Convert the Exynos7 DECON display controller bindings to DT schema
format.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220208171823.226211-6-krzysztof.kozlowski@canonical.com

Documentation/devicetree/bindings/display/exynos/exynos7-decon.txt

-Device-Tree bindings for Samsung Exynos7 SoC display controller (DECON)
-
-DECON (Display and Enhancement Controller) is the Display Controller for the
-Exynos7 series of SoCs which transfers the image data from a video memory
-buffer to an external LCD interface.
-
-Required properties:
-- compatible: value should be "samsung,exynos7-decon";
-
-- reg: physical base address and length of the DECON registers set.
-
-- interrupts: should contain a list of all DECON IP block interrupts in the
-		 order: FIFO Level, VSYNC, LCD_SYSTEM. The interrupt specifier
-		 format depends on the interrupt controller used.
-
-- interrupt-names: should contain the interrupt names: "fifo", "vsync",
-	"lcd_sys", in the same order as they were listed in the interrupts
-        property.
-
-- pinctrl-0: pin control group to be used for this controller.
-
-- pinctrl-names: must contain a "default" entry.
-
-- clocks: must include clock specifiers corresponding to entries in the
-         clock-names property.
-
-- clock-names: list of clock names sorted in the same order as the clocks
-               property. Must contain "pclk_decon0", "aclk_decon0",
-	       "decon0_eclk", "decon0_vclk".
-- i80-if-timings: timing configuration for lcd i80 interface support.
-
-Optional Properties:
-- power-domains: a phandle to DECON power domain node.
-- display-timings: timing settings for DECON, as described in document [1].
-		Can be used in case timings cannot be provided otherwise
-		or to override timings provided by the panel.
-
-[1]: Documentation/devicetree/bindings/display/panel/display-timing.txt
-
-Example:
-
-SoC specific DT entry:
-
-	decon@13930000 {
-		compatible = "samsung,exynos7-decon";
-		interrupt-parent = <&combiner>;
-		reg = <0x13930000 0x1000>;
-		interrupt-names = "lcd_sys", "vsync", "fifo";
-		interrupts = <0 188 0>, <0 189 0>, <0 190 0>;
-		clocks = <&clock_disp PCLK_DECON_INT>,
-			 <&clock_disp ACLK_DECON_INT>,
-			 <&clock_disp SCLK_DECON_INT_ECLK>,
-			 <&clock_disp SCLK_DECON_INT_EXTCLKPLL>;
-		clock-names = "pclk_decon0", "aclk_decon0", "decon0_eclk",
-				"decon0_vclk";
-		status = "disabled";
-	};
-
-Board specific DT entry:
-
-	decon@13930000 {
-		pinctrl-0 = <&lcd_clk &pwm1_out>;
-		pinctrl-names = "default";
-		status = "okay";
-	};

Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/samsung/samsung,exynos7-decon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos7 SoC Display and Enhancement Controller (DECON)
+
+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: |
+  DECON (Display and Enhancement Controller) is the Display Controller for the
+  Exynos7 series of SoCs which transfers the image data from a video memory
+  buffer to an external LCD interface.
+
+properties:
+  compatible:
+    const: samsung,exynos7-decon
+
+  clocks:
+    minItems: 4
+    maxItems: 4
+
+  clock-names:
+    items:
+      - const: pclk_decon0
+      - const: aclk_decon0
+      - const: decon0_eclk
+      - const: decon0_vclk
+
+  display-timings:
+    $ref: ../panel/display-timings.yaml#
+
+  i80-if-timings:
+    type: object
+    description: timing configuration for lcd i80 interface support
+    properties:
+      cs-setup:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Clock cycles for the active period of address signal is enabled until
+          chip select is enabled.
+        default: 0
+
+      wr-active:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Clock cycles for the active period of CS is enabled.
+        default: 1
+
+      wr-hold:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Clock cycles for the active period of CS is disabled until write
+          signal is disabled.
+        default: 0
+
+      wr-setup:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Clock cycles for the active period of CS signal is enabled until
+          write signal is enabled.
+        default: 0
+
+  interrupts:
+    items:
+      - description: FIFO level
+      - description: VSYNC
+      - description: LCD system
+
+  interrupt-names:
+    items:
+      - const: fifo
+      - const: vsync
+      - const: lcd_sys
+
+  power-domains:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - interrupts
+  - interrupt-names
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos7-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    display-controller@13930000 {
+        compatible = "samsung,exynos7-decon";
+        reg = <0x13930000 0x1000>;
+        interrupt-names = "fifo", "vsync", "lcd_sys";
+        interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clock_disp 100>, /* PCLK_DECON_INT */
+                 <&clock_disp 101>, /* ACLK_DECON_INT */
+                 <&clock_disp 102>, /* SCLK_DECON_INT_ECLK */
+                 <&clock_disp 103>; /* SCLK_DECON_INT_EXTCLKPLL */
+        clock-names = "pclk_decon0",
+                      "aclk_decon0",
+                      "decon0_eclk",
+                      "decon0_vclk";
+        pinctrl-0 = <&lcd_clk &pwm1_out>;
+        pinctrl-names = "default";
+    };