dt-bindings: clocks: Convert Allwinner A80 DE clocks to a schema

The Allwinner A80 SoC has a display clocks controller that is supported in
Linux, with a matching Device Tree binding.

Now that we have the DT validation in place, let's convert the device tree
bindings for that controller over to a YAML schemas.

Reviewed-by: Stephen Boyd <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>

Documentation/devicetree/bindings/clock/allwinner,sun9i-a80-de-clks.yaml

···
+# SPDX-License-Identifier: GPL-2.0+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/allwinner,sun9i-a80-de-clks.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A80 Display Engine Clock Controller Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <[e-mail]>
+  - Maxime Ripard <[e-mail]>
+
+properties:
+  "#clock-cells":
+    const: 1
+
+  "#reset-cells":
+    const: 1
+
+  compatible:
+    const: allwinner,sun9i-a80-de-clks
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bus Clock
+      - description: RAM Bus Clock
+      - description: Module Clock
+
+  clock-names:
+    items:
+      - const: mod
+      - const: dram
+      - const: bus
+
+  resets:
+    maxItems: 1
+
+required:
+  - "#clock-cells"
+  - "#reset-cells"
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sun9i-a80-ccu.h>
+    #include <dt-bindings/reset/sun9i-a80-ccu.h>
+
+    de_clocks: clock@3000000 {
+        compatible = "allwinner,sun9i-a80-de-clks";
+        reg = <0x03000000 0x30>;
+        clocks = <&ccu CLK_DE>, <&ccu CLK_SDRAM>, <&ccu CLK_BUS_DE>;
+        clock-names = "mod", "dram", "bus";
+        resets = <&ccu RST_BUS_DE>;
+        #clock-cells = <1>;
+        #reset-cells = <1>;
+    };
+
+...

Documentation/devicetree/bindings/clock/sun9i-de.txt

···
-Allwinner A80 Display Engine Clock Control Binding
---------------------------------------------------
-
-Required properties :
-- compatible: must contain one of the following compatibles:
-		- "allwinner,sun9i-a80-de-clks"
-
-- reg: Must contain the registers base address and length
-- clocks: phandle to the clocks feeding the display engine subsystem.
-	  Three are needed:
-  - "mod": the display engine module clock
-  - "dram": the DRAM bus clock for the system
-  - "bus": the bus clock for the whole display engine subsystem
-- clock-names: Must contain the clock names described just above
-- resets: phandle to the reset control for the display engine subsystem.
-- #clock-cells : must contain 1
-- #reset-cells : must contain 1
-
-Example:
-de_clocks: clock@3000000 {
-	compatible = "allwinner,sun9i-a80-de-clks";
-	reg = <0x03000000 0x30>;
-	clocks = <&ccu CLK_DE>, <&ccu CLK_SDRAM>, <&ccu CLK_BUS_DE>;
-	clock-names = "mod", "dram", "bus";
-	resets = <&ccu RST_BUS_DE>;
-	#clock-cells = <1>;
-	#reset-cells = <1>;
-};