dt-bindings: clock: Convert axis,artpec6-clkctrl to DT schema

Convert the Axis ARTPEC-6 clock controller to DT schema format. It's a
straight forward conversion.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250521004647.1792464-1-robh@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: robherring

Documentation/devicetree/bindings/clock/artpec6.txt

@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/axis,artpec6-clkctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Axis ARTPEC-6 clock controller
+
+maintainers:
+  - Lars Persson <lars.persson@axis.com>
+
+properties:
+  compatible:
+    const: axis,artpec6-clkctrl
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+  clocks:
+    minItems: 1
+    items:
+      - description: external 50 MHz oscillator.
+      - description: optional audio reference clock.
+      - description: fractional audio clock divider 0.
+      - description: fractional audio clock divider 1.
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: sys_refclk
+      - const: i2s_refclk
+      - const: frac_clk0
+      - const: frac_clk1
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@f8000000 {
+        compatible = "axis,artpec6-clkctrl";
+        reg = <0xf8000000 0x48>;
+        #clock-cells = <1>;
+        clocks = <&ext_clk>;
+        clock-names = "sys_refclk";
+    };