dt-bindings: timer: convert timer/amlogic,meson6-timer.txt to dt-schema

Convert the Amlogic Meson6 SoCs Timer Controller bindings to dt-schema.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20221117-b4-amlogic-bindings-convert-v5-1-63781bed4452@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/timer/amlogic,meson6-timer.txt

-Amlogic Meson6 SoCs Timer Controller
-
-Required properties:
-
-- compatible : should be "amlogic,meson6-timer"
-- reg : Specifies base physical address and size of the registers.
-- interrupts : The four interrupts, one for each timer event
-- clocks : phandles to the pclk (system clock) and XTAL clocks
-- clock-names : must contain "pclk" and "xtal"
-
-Example:
-
-timer@c1109940 {
-	compatible = "amlogic,meson6-timer";
-	reg = <0xc1109940 0x14>;
-	interrupts = <GIC_SPI 10 IRQ_TYPE_EDGE_RISING>,
-		     <GIC_SPI 11 IRQ_TYPE_EDGE_RISING>,
-		     <GIC_SPI 6 IRQ_TYPE_EDGE_RISING>,
-		     <GIC_SPI 29 IRQ_TYPE_EDGE_RISING>;
-	clocks = <&xtal>, <&clk81>;
-	clock-names = "xtal", "pclk";
-};

Documentation/devicetree/bindings/timer/amlogic,meson6-timer.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/amlogic,meson6-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Meson6 SoCs Timer Controller
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+
+properties:
+  compatible:
+    const: amlogic,meson6-timer
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 4
+    description: per-timer event interrupts
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: xtal
+      - const: pclk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    timer@c1109940 {
+        compatible = "amlogic,meson6-timer";
+        reg = <0xc1109940 0x14>;
+        interrupts = <GIC_SPI 10 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 11 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 6 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 29 IRQ_TYPE_EDGE_RISING>;
+        clocks = <&xtal>, <&clk81>;
+        clock-names = "xtal", "pclk";
+    };