dt-bindings: rtc: pcf2127: update bindings

The NXP pcf2127 supports reset-source.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210202000634.3438575-1-alexandre.belloni@bootlin.com

Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/nxp,pcf2127.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCF2127 Real Time Clock
+
+allOf:
+  - $ref: "rtc.yaml#"
+
+maintainers:
+  - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+properties:
+  compatible:
+    const: nxp,pcf2127
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  start-year: true
+
+  reset-source: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@51 {
+            compatible = "nxp,pcf2127";
+            reg = <0x51>;
+            pinctrl-0 = <&rtc_nint_pins>;
+            interrupts-extended = <&gpio1 16 IRQ_TYPE_LEVEL_HIGH>;
+            reset-source;
+        };
+    };
+
+...

Documentation/devicetree/bindings/rtc/trivial-rtc.yaml

@@ -48,12 +48,8 @@ properties:
       - microcrystal,rv3029
       # Real Time Clock
       - microcrystal,rv8523
-      # Real-time clock
-      - nxp,pcf2127
-      # Real-time clock
-      - nxp,pcf2129
-      # Real-time clock
       - nxp,pca2129
+      - nxp,pcf2129
       # Real-time Clock Module
       - pericom,pt7c4338
       # I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC