[PATCH v4 2/4] dt-bindings: soc: spacemit: Add spacemit,k1-syscon

[Haylen Chu <heylenay@4d2.org>]

Add documentation to describe Spacemit K1 system controller registers.

Signed-off-by: Haylen Chu <heylenay@4d2.org>
---
 .../soc/spacemit/spacemit,k1-syscon.yaml      | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml

diff --git a/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml b/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml
new file mode 100644
index 000000000000..79c4a74ff30e
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/spacemit/spacemit,k1-syscon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spacemit K1 SoC System Controller
+
+maintainers:
+  - Haylen Chu <heylenay@4d2.org>
+
+description:
+  The Spacemit K1 SoC system controller provides access to shared register files
+  for related SoC modules, such as clock controller and reset controller.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - spacemit,k1-apbc-syscon
+          - spacemit,k1-apbs-syscon
+          - spacemit,k1-apmu-syscon
+          - spacemit,k1-mpmu-syscon
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  clock-controller:
+    $ref: /schemas/clock/spacemit,k1-ccu.yaml#
+    type: object
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    system-controller@d4050000 {
+        compatible = "spacemit,k1-mpmu-syscon", "syscon", "simple-mfd";
+        reg = <0xd4050000 0x209c>;
+
+        clock-controller {
+            compatible = "spacemit,k1-ccu-mpmu";
+            clocks = <&osc_32k>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>;
+            clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m";
+            #clock-cells = <1>;
+        };
+    };
-- 
2.47.1