[PATCH v6 1/3] dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC

[Jingbao Qiu]

Add RTC devicetree binding for Sophgo CV1800 SoC.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
Signed-off-by: Jingbao Qiu <qiujingbao.dlmu at gmail.com>
---
 .../bindings/rtc/sophgo,cv1800-rtc.yaml       | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml

diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml
new file mode 100644
index 000000000000..e54abd59c193
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/sophgo,cv1800-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Real Time Clock of the Sophgo CV1800 SoC
+
+description:
+  Real Time Clock (RTC) is an independently powered module
+  within the chip, which includes a 32KHz oscillator and a
+  Power On Reset/POR submodule. It can be used for time display
+  and timed alarm generation. In addition, the hardware state
+  machine provides triggering and timing control for chip
+  power on, off, and reset.
+
+maintainers:
+  - Jingbao Qiu <qiujingbao.dlmu at gmail.com>
+
+allOf:
+  - $ref: rtc.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: sophgo,cv1800-rtc
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    rtc at 5025000 {
+        compatible = "sophgo,cv1800-rtc", "syscon";
+        reg = <0x5025000 0x2000>;
+        interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&osc>;
+    };
-- 
2.43.0