dt-bindings: timer: Convert Allwinner A10 Timer to a schema

The older Allwinner SoCs have a Timer supported in Linux, with a matching
Device Tree binding.

While the original binding only mentions one interrupt, the timer actually
has 6 of them.

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

Signed-off-by: Maxime Ripard <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>

Documentation/devicetree/bindings/timer/allwinner,sun4i-a10-timer.yaml

···
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/allwinner,sun4i-a10-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A10 Timer Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <[e-mail]>
+  - Maxime Ripard <[e-mail]>
+
+properties:
+  compatible:
+    enum:
+      - allwinner,sun4i-a10-timer
+      - allwinner,suniv-f1c100s-timer
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description:
+      List of timers interrupts
+
+  clocks:
+    maxItems: 1
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          items:
+            const: allwinner,sun4i-a10-timer
+
+    then:
+      properties:
+        interrupts:
+          minItems: 6
+          maxItems: 6
+
+  - if:
+      properties:
+        compatible:
+          items:
+            const: allwinner,suniv-f1c100s-timer
+
+    then:
+      properties:
+        interrupts:
+          minItems: 3
+          maxItems: 3
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    timer {
+        compatible = "allwinner,sun4i-a10-timer";
+        reg = <0x01c20c00 0x400>;
+        interrupts = <22>,
+                     <23>,
+                     <24>,
+                     <25>,
+                     <67>,
+                     <68>;
+        clocks = <&osc>;
+    };
+
+...

Documentation/devicetree/bindings/timer/allwinner,sun4i-timer.txt

···
-Allwinner A1X SoCs Timer Controller
-
-Required properties:
-
-- compatible : should be one of the following:
-              "allwinner,sun4i-a10-timer"
-              "allwinner,suniv-f1c100s-timer"
-- reg : Specifies base physical address and size of the registers.
-- interrupts : The interrupt of the first timer
-- clocks: phandle to the source clock (usually a 24 MHz fixed clock)
-
-Example:
-
-timer {
-	compatible = "allwinner,sun4i-a10-timer";
-	reg = <0x01c20c00 0x400>;
-	interrupts = <22>;
-	clocks = <&osc>;
-};