[PATCH V3 1/2] dt-bindings: rtc: Add TI K3 RTC description

[Nishanth Menon]

This adds the documentation for the devicetree bindings of the Texas
Instruments RTC modules on K3 family of SoCs such as AM62x SoCs or
newer.

Signed-off-by: Nishanth Menon <nm@xxxxxx>
---

Changes since V2:
* Krzysztof's comments addressed (rtc.yaml, dropped wakeup-source,
  switched over to unevaluatedProperties)

V2: https://lore.kernel.org/all/20220511002600.27964-2-nm@xxxxxx/
V1: https://lore.kernel.org/all/20220412073138.25027-2-nm@xxxxxx/

 .../devicetree/bindings/rtc/ti,k3-rtc.yaml    | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/ti,k3-rtc.yaml

diff --git a/Documentation/devicetree/bindings/rtc/ti,k3-rtc.yaml b/Documentation/devicetree/bindings/rtc/ti,k3-rtc.yaml
new file mode 100644
index 000000000000..d995ef04a6eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/ti,k3-rtc.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/ti,k3-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 Real Time Clock
+
+maintainers:
+  - Nishanth Menon <nm@xxxxxx>
+
+description: |
+  This RTC appears in the AM62x family of SoCs.
+
+allOf:
+  - $ref: "rtc.yaml#"
+
+properties:
+  compatible:
+    enum:
+      - ti,am62-rtc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: VBUS Interface clock
+      - description: 32k Clock source (external or internal).
+
+  clock-names:
+    items:
+      - const: vbus
+      - const: osc32k
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    rtc@2b1f0000 {
+        compatible = "ti,am62-rtc";
+        reg = <0x2b1f0000 0x100>;
+        interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
+        power-domains = <&bar 0>;
+        clocks = <&foo 0>, <&foo 1>;
+        clock-names = "vbus", "osc32k";
+        wakeup-source;
+    };
-- 
2.31.1