dt-bindings: rtc: add DT bindings for Cirrus EP93xx

This adds device tree bindings for the Cirrus Logic EP93xx
RTC block used in these SoCs.

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>

diff --git a/Documentation/devicetree/bindings/rtc/cirrus,ep93xx-rtc.yaml b/Documentation/devicetree/bindings/rtc/cirrus,ep93xx-rtc.yaml
new file mode 100644 (file)
index 0000000..9fac652
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/cirrus,ep93xx-rtc.yaml
@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/ep93xx-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus EP93xx Real Time Clock controller
+
+maintainers:
+  - Hartley Sweeten <hsweeten@visionengravers.com>
+  - Alexander Sverdlin <alexander.sverdlin@gmail.com>
+
+properties:
+  compatible:
+    const: cirrus,ep93xx-rtc
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    rtc0: rtc@80920000 {
+        compatible = "cirrus,ep93xx-rtc";
+        reg = <0x80920000 0x100>;
+    };
+