[PATCH v3 1/4] dt-bindings: mfd: sophgo: add MFD subsys support for Sophgo CV1800 series SoC

[Jingbao Qiu]

Add devicetree binding for Sophgo CV1800 SoC MFD subsys.

Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@xxxxxxxxx>
---
 .../bindings/mfd/sophgo,cv1800-subsys.yaml    | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/sophgo,cv1800-subsys.yaml

diff --git a/Documentation/devicetree/bindings/mfd/sophgo,cv1800-subsys.yaml b/Documentation/devicetree/bindings/mfd/sophgo,cv1800-subsys.yaml
new file mode 100644
index 000000000000..c2a071c8a2de
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/sophgo,cv1800-subsys.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/sophgo,cv1800-subsys.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800 SoC subsys controller
+
+maintainers:
+  - Jingbao Qiu <qiujingbao.dlmu@xxxxxxxxx>
+
+description:
+  The Sophgo CV1800 SoC subsys controller contains many functions
+  for example, RTC and restart. In addition, CV1800 has an 8051
+  subsystem, which is configured through registers at this controller.
+
+properties:
+  compatible:
+    items:
+      - const: sophgo,cv1800b-subsys
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  rtc:
+    $ref: /schemas/rtc/sophgo,cv1800-rtc.yaml#
+    type: object
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/sophgo,cv1800.h>
+
+    syscon@5025000 {
+      compatible = "sophgo,cv1800b-subsys", "syscon", "simple-mfd";
+      reg = <0x05025000 0x2000>;
+
+      rtc {
+        compatible = "sophgo,cv1800b-rtc";
+        interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clk CLK_RTC_25M>;
+      };
+    };
-- 
2.25.1