[PATCH] dt-bindings: arm: omap: Convert Counter-32K to DT schema

[Eduard Bostina]

Convert the Texas Instruments OMAP Counter-32K bindings to DT schema.

During the conversion, two updates were made to reflect actual hardware
usage and resolve dtbs_check warnings:
- 'ti,hwmods' has been made optional. While a search confirms it is no
  longer used, it is kept to maintain backwards compatibility.
- Added the 'ti,am4372-counter32k' compatible string, as an AM437x
  device tree uses this instead of the generic 'ti,omap-counter32k'.

Signed-off-by: Eduard Bostina <egbostina@xxxxxxxxx>
---
 .../devicetree/bindings/arm/omap/counter.txt  | 15 -------
 .../bindings/arm/omap/ti,omap-counter32k.yaml | 41 +++++++++++++++++++
 2 files changed, 41 insertions(+), 15 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arm/omap/counter.txt
 create mode 100644 Documentation/devicetree/bindings/arm/omap/ti,omap-counter32k.yaml

diff --git a/Documentation/devicetree/bindings/arm/omap/counter.txt b/Documentation/devicetree/bindings/arm/omap/counter.txt
deleted file mode 100644
index 5bd8aa091..000000000
--- a/Documentation/devicetree/bindings/arm/omap/counter.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-OMAP Counter-32K bindings
-
-Required properties:
-- compatible:	Must be "ti,omap-counter32k" for OMAP controllers
-- reg:		Contains timer register address range (base address and length)
-- ti,hwmods:	Name of the hwmod associated to the counter, which is typically
-		"counter_32k"
-
-Example:
-
-counter32k: counter@4a304000 {
-	compatible = "ti,omap-counter32k";
-	reg = <0x4a304000 0x20>;
-	ti,hwmods = "counter_32k";
-};
diff --git a/Documentation/devicetree/bindings/arm/omap/ti,omap-counter32k.yaml b/Documentation/devicetree/bindings/arm/omap/ti,omap-counter32k.yaml
new file mode 100644
index 000000000..aadb5ea1b
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/ti,omap-counter32k.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/omap/ti,omap-counter32k.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments OMAP Counter-32K
+
+maintainers:
+  - Eduard Bostina <egbostina@xxxxxxxxx>
+
+properties:
+  compatible:
+    oneOf:
+      - const: ti,omap-counter32k
+      - items:
+          - const: ti,am4372-counter32k
+          - const: ti,omap-counter32k
+
+  reg:
+    maxItems: 1
+
+  ti,hwmods:
+    description: Name of the hwmod associated to the counter
+    $ref: /schemas/types.yaml#/definitions/string-array
+    items:
+      - const: counter_32k
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    counter32k: counter@4a304000 {
+        compatible = "ti,omap-counter32k";
+        reg = <0x4a304000 0x20>;
+        ti,hwmods = "counter_32k";
+    };
-- 
2.54.0