dt-bindings: clock: Convert alphascale,asm9260-clock-controller to DT schema

Convert the Alphascale Clock Controller binding to DT schema format.
Add the undocumented 'clocks' property which is used in DTS. Drop the
clock defines and consumer examples from the old binding.

Signed-off-by: Rob Herring (Arm) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Oleksij Rempel <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

Author: robherring

Documentation/devicetree/bindings/clock/alphascale,acc.txt

@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/alphascale,asm9260-clock-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Alphascale Clock Controller
+
+maintainers:
+  - Oleksij Rempel <[email protected]>
+
+description: |
+  The ACC (Alphascale Clock Controller) is responsible for choosing proper
+  clock source, setting dividers and clock gates.
+
+  Simple one-cell clock specifier format is used, where the only cell is used
+  as an index of the clock inside the provider.
+  It is encouraged to use dt-binding for clock index definitions. SoC specific
+  dt-binding should be included to the device tree descriptor. For example
+  Alphascale ASM9260:
+
+  #include <dt-bindings/clock/alphascale,asm9260.h>
+
+  This binding contains two types of clock providers:
+
+    _AHB_ - AHB gate;
+    _SYS_ - adjustable clock source. Not all peripheral have _SYS_ clock provider.
+
+  All clock specific details can be found in the SoC documentation.
+
+properties:
+  compatible:
+    const: alphascale,asm9260-clock-controller
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+
+additionalProperties: false