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diff --git a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qe-si.yaml b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qe-si.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/fsl/cpm_qe/fsl,qe-si.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale QUICC Engine module Serial Interface Block (SI)
+
+maintainers:
+  - Frank Li <Frank.Li@nxp.com>
+
+description:
+  The SI manages the routing of eight TDM lines to the QE block serial drivers,
+  the MCC and the UCCs, for receive and transmit.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - fsl,ls1043-qe-si
+          - const: fsl,t1040-qe-si
+      - enum:
+          - fsl,t1040-qe-si
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    si@700 {
+        compatible = "fsl,t1040-qe-si";
+        reg = <0x700 0x80>;
+    };