dt-bindings: display: Convert fsl,imx-fb.txt to dt-schema

Compared to the txt description this adds clocks and clock-names to
match reality.

Note that fsl,imx-lcdc was picked as the new name as this is the actual
hardware's name. There will be a new binding implementing the saner drm
concept that is supposed to supersede this legacy fb binding

Signed-off-by: Uwe Kleine-König <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/display/imx/fsl,imx-fb.txt

···
-Freescale imx21 Framebuffer
-
-This framebuffer driver supports devices imx1, imx21, imx25, and imx27.
-
-Required properties:
-- compatible : "fsl,<chip>-fb", chip should be imx1 or imx21
-- reg : Should contain 1 register ranges(address and length)
-- interrupts : One interrupt of the fb dev
-
-Required nodes:
-- display: Phandle to a display node as described in
-	Documentation/devicetree/bindings/display/panel/display-timing.txt
-	Additional, the display node has to define properties:
-	- bits-per-pixel: Bits per pixel
-	- fsl,pcr: LCDC PCR value
-	A display node may optionally define
-	- fsl,aus-mode: boolean to enable AUS mode (only for imx21)
-
-Optional properties:
-- lcd-supply: Regulator for LCD supply voltage.
-- fsl,dmacr: DMA Control Register value. This is optional. By default, the
-	register is not modified as recommended by the datasheet.
-- fsl,lpccr: Contrast Control Register value. This property provides the
-	default value for the contrast control register.
-	If that property is omitted, the register is zeroed.
-- fsl,lscr1: LCDC Sharp Configuration Register value.
-
-Example:
-
-	imxfb: fb@10021000 {
-		compatible = "fsl,imx21-fb";
-		interrupts = <61>;
-		reg = <0x10021000 0x1000>;
-		display = <&display0>;
-	};
-
-	...
-
-	display0: display0 {
-		model = "Primeview-PD050VL1";
-		bits-per-pixel = <16>;
-		fsl,pcr = <0xf0c88080>;	/* non-standard but required */
-		display-timings {
-			native-mode = <&timing_disp0>;
-			timing_disp0: 640x480 {
-				hactive = <640>;
-				vactive = <480>;
-				hback-porch = <112>;
-				hfront-porch = <36>;
-				hsync-len = <32>;
-				vback-porch = <33>;
-				vfront-porch = <33>;
-				vsync-len = <2>;
-				clock-frequency = <25000000>;
-			};
-		};
-	};

Documentation/devicetree/bindings/display/imx/fsl,imx-lcdc.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx-lcdc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX LCD Controller, found on i.MX1, i.MX21, i.MX25 and i.MX27
+
+maintainers:
+  - Sascha Hauer <[e-mail]>
+  - Pengutronix Kernel Team <[e-mail]>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,imx1-fb
+          - fsl,imx21-fb
+      - items:
+          - enum:
+              - fsl,imx25-fb
+              - fsl,imx27-fb
+          - const: fsl,imx21-fb
+
+  clocks:
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: ipg
+      - const: ahb
+      - const: per
+
+  display:
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+  lcd-supply:
+    description:
+      Regulator for LCD supply voltage.
+
+  fsl,dmacr:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Override value for DMA Control Register
+
+  fsl,lpccr:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Contrast Control Register value.
+
+  fsl,lscr1:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      LCDC Sharp Configuration Register value.
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - display
+  - interrupts
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    imxfb: fb@10021000 {
+        compatible = "fsl,imx21-fb";
+        interrupts = <61>;
+        reg = <0x10021000 0x1000>;
+        display = <&display0>;
+        clocks = <&clks 103>, <&clks 49>, <&clks 66>;
+        clock-names = "ipg", "ahb", "per";
+    };
+
+    display0: display0 {
+        model = "Primeview-PD050VL1";
+        bits-per-pixel = <16>;
+        fsl,pcr = <0xf0c88080>; /* non-standard but required */
+
+        display-timings {
+            native-mode = <&timing_disp0>;
+            timing_disp0: timing0 {
+                hactive = <640>;
+                vactive = <480>;
+                hback-porch = <112>;
+                hfront-porch = <36>;
+                hsync-len = <32>;
+                vback-porch = <33>;
+                vfront-porch = <33>;
+                vsync-len = <2>;
+                clock-frequency = <25000000>;
+            };
+        };
+    };