[PATCH v3 05/15] dt-bindings: rtc: add bindings for microchip mpfs rtc

[<conor.dooley@xxxxxxxxxxxxx>]

From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>

Add device tree bindings for the real time clock on
the Microchip PolarFire SoC.

Signed-off-by: Daire McNamara <daire.mcnamara@xxxxxxxxxxxxx>
Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
---
 .../bindings/rtc/microchip,mfps-rtc.yaml      | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml

diff --git a/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml b/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml
new file mode 100644
index 000000000000..d57460cbe5e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/microchip,mfps-rtc.yaml#
+
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PolarFire Soc (MPFS) RTC Device Tree Bindings
+
+allOf:
+  - $ref: rtc.yaml#
+
+maintainers:
+  - Daire McNamara <daire.mcnamara@xxxxxxxxxxxxx>
+  - Lewis Hanly <lewis.hanly@xxxxxxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - microchip,mpfs-rtc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 2
+
+  microchip,prescaler:
+    description: |
+      The prescaler divides the input frequency to create a time-based strobe (typically 1 Hz) for
+      the calendar counter. The Alarm and Compare Registers, in conjunction with the calendar
+      counter, facilitate time-matched events. To properly operate in Calendar or Binary mode,
+      the 26-bit prescaler must be programmed to generate a strobe to the RTC.
+    maxItems: 1
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: rtc
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/microchip,mpfs-clock.h>
+    rtc@20124000 {
+        compatible = "microchip,mpfs-rtc";
+        reg = <0x20124000 0x1000>;
+        clocks = <&clkcfg CLK_RTC>;
+        clock-names = "rtc";
+        interrupts = <80>, <81>;
+    };
+...
-- 
2.32.0