[PATCH v2 4/8] dt-bindings: timer: Add schema for realtek,otto-timer

[Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>]

Add the devicetree schema for the realtek,otto-timer present on a number
of Realtek SoCs.

Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
---

Notes:
    Changes in v2:
    - Use specific compatible
    - Remove unnecessary label
    - Remove unused irq flags (interrupt controller is one-cell)
    - Set minItems for reg and interrupts based on compatible

 .../bindings/timer/realtek,otto-timer.yaml    | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/realtek,otto-timer.yaml

diff --git a/Documentation/devicetree/bindings/timer/realtek,otto-timer.yaml b/Documentation/devicetree/bindings/timer/realtek,otto-timer.yaml
new file mode 100644
index 000000000000..13ea7aa946fe
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/realtek,otto-timer.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/realtek,otto-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek Otto SoCs Timer/Counter
+
+description:
+  Realtek SoCs support a number of timers/counters. These are used
+  as a per CPU clock event generator and an overall CPU clocksource.
+
+maintainers:
+  - Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
+
+properties:
+  $nodename:
+    pattern: "^timer@[0-9a-f]+$"
+
+  compatible:
+    items:
+      - enum:
+          - realtek,rtl9302-timer
+      - const: realtek,otto-timer
+
+  reg:
+    maxItems: 5
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 5
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: realtek,rtl9302-timer
+    then:
+      properties:
+        reg:
+          minItems: 2
+        interrupts:
+          minItems: 2
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    timer@3200 {
+      compatible = "realtek,rtl9302-timer", "realtek,otto-timer";
+      reg = <0x3200 0x10>, <0x3210 0x10>, <0x3220 0x10>,
+            <0x3230 0x10>, <0x3240 0x10>;
+
+      interrupt-parent = <&intc>;
+      interrupts = <7>, <8>, <9>, <10>, <11>;
+      clocks = <&lx_clk>;
+    };
-- 
2.45.2