dt-bindings: rtc: Convert TI Palmas RTC to DT schema

Convert the Texas Instruments Palmas RTC controller bindings
to DT schema.

As part of the conversion, declare 'wakeup-source: true'.
This documents the Palmas PMIC's capability to wake the system.

Signed-off-by: Eduard Bostina <egbostina@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260719141008.3562347-2-egbostina@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Documentation/devicetree/bindings/rtc/rtc-palmas.txt

@@ -1,32 +0,0 @@
-Palmas RTC controller bindings
-
-Required properties:
-- compatible:
-  - "ti,palmas-rtc" for palma series of the RTC controller
-- interrupts: Interrupt number of RTC submodule on device.
-
-Optional properties:
-
-- ti,backup-battery-chargeable: The Palmas series device like TPS65913 or
-	TPS80036 supports the backup battery for powering the RTC when main
-	battery is removed or in very low power state. The backup battery
-	can be chargeable or non-chargeable. This flag will tells whether
-	battery is chargeable or not. If charging battery then driver can
-	enable the charging.
-- ti,backup-battery-charge-high-current: Enable high current charging in
-	backup battery. Device supports the < 100uA and > 100uA charging.
-	The high current will be > 100uA. Absence of this property will
-	charge battery to lower current i.e. < 100uA.
-
-Example:
-	palmas: tps65913@58 {
-		...
-		palmas_rtc: rtc {
-			compatible = "ti,palmas-rtc";
-			interrupt-parent = <&palmas>;
-			interrupts = <8 0>;
-			ti,backup-battery-chargeable;
-			ti,backup-battery-charge-high-current;
-		};
-		...
-	};

Documentation/devicetree/bindings/rtc/ti,palmas-rtc.yaml

@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/ti,palmas-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments Palmas RTC
+
+maintainers:
+  - Eduard Bostina <egbostina@gmail.com>
+
+allOf:
+  - $ref: /schemas/rtc/rtc.yaml#
+
+properties:
+  compatible:
+    const: ti,palmas-rtc
+
+  interrupts:
+    maxItems: 1
+
+  wakeup-source: true
+
+  ti,backup-battery-chargeable:
+    type: boolean
+    description:
+      The backup battery can be chargeable or non-chargeable. This flag
+      indicates whether the battery is chargeable. If present, the driver
+      can enable charging.
+
+  ti,backup-battery-charge-high-current:
+    type: boolean
+    description:
+      Enable high current charging in the backup battery.
+      Device supports the < 100uA and > 100uA charging. The high current will
+      be > 100uA. Absence of this property will charge battery to lower
+      current i.e. < 100uA.
+
+required:
+  - compatible
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc {
+            compatible = "ti,palmas-rtc";
+            interrupts = <8 0>;
+            ti,backup-battery-chargeable;
+            ti,backup-battery-charge-high-current;
+        };
+    };