diff --git a/Documentation/devicetree/bindings/net/wireless/qcom,ath12k.yaml b/Documentation/devicetree/bindings/net/wireless/qcom,ath12k.yaml
index 1b5884015b15..42bcd73dd159 100644
--- a/Documentation/devicetree/bindings/net/wireless/qcom,ath12k.yaml
+++ b/Documentation/devicetree/bindings/net/wireless/qcom,ath12k.yaml
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 # Copyright (c) 2024 Linaro Limited
+# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/net/wireless/qcom,ath12k.yaml#
@@ -18,10 +19,17 @@ properties:
   compatible:
     enum:
       - pci17cb,1107  # WCN7850
+      - pci17cb,1109  # QCN9274
 
   reg:
     maxItems: 1
 
+  qcom,ath12k-calibration-variant:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: |
+      string to uniquely identify variant of the calibration data for designs
+      with colliding bus and device ids
+
   vddaon-supply:
     description: VDD_AON supply regulator handle
 
@@ -49,21 +57,100 @@ properties:
   vddpcie1p8-supply:
     description: VDD_PCIE_1P8 supply regulator handle
 
+  wsi:
+    type: object
+    description: |
+      The ath12k devices (QCN9274) feature WSI support. WSI stands for
+      WLAN Serial Interface. It is used for the exchange of specific
+      control information across radios based on the doorbell mechanism.
+      This WSI connection is essential to exchange control information
+      among these devices.
+
+      Diagram to represent one WSI connection (one WSI group) among
+      three devices.
+
+               +-------+        +-------+        +-------+
+               | pcie2 |        | pcie3 |        | pcie1 |
+               |       |        |       |        |       |
+        +----->|  wsi  |------->|  wsi  |------->|  wsi  |-----+
+        |      | grp 0 |        | grp 0 |        | grp 2 |     |
+        |      +-------+        +-------+        +-------+     |
+        +------------------------------------------------------+
+
+      Diagram to represent two WSI connections (two separate WSI groups)
+      among four devices.
+
+           +-------+    +-------+          +-------+    +-------+
+           | pcie2 |    | pcie3 |          | pcie1 |    | pcie0 |
+           |       |    |       |          |       |    |       |
+       +-->|  wsi  |--->|  wsi  |--+   +-->|  wsi  |--->|  wsi  |--+
+       |   | grp 0 |    | grp 0 |  |   |   | grp 1 |    | grp 1 |  |
+       |   +-------+    +-------+  |   |   +-------+    +-------+  |
+       +---------------------------+   +---------------------------+
+
+    properties:
+      qcom,wsi-group-id:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          It represents the identifier assigned to the WSI connection. All
+          the ath12k devices connected to same WSI connection have the
+          same wsi-group-id.
+
+      qcom,wsi-master:
+        type: boolean
+        description:
+          Indicates if this device is the WSI master.
+
+      ports:
+        $ref: /schemas/graph.yaml#/properties/ports
+        description:
+          These ports are used to connect multiple WSI supported devices to
+          form the WSI group.
+
+        properties:
+          port@0:
+            $ref: /schemas/graph.yaml#/properties/port
+            description:
+              This is the TX port of WSI interface. It is attached to the RX
+              port of the next device in the WSI connection.
+
+          port@1:
+            $ref: /schemas/graph.yaml#/properties/port
+            description:
+              This is the RX port of WSI interface. It is attached to the TX
+              port of the previous device in the WSI connection.
+
+    required:
+      - qcom,wsi-group-id
+      - ports
+
+    additionalProperties: false
+
 required:
   - compatible
   - reg
-  - vddaon-supply
-  - vddwlcx-supply
-  - vddwlmx-supply
-  - vddrfacmn-supply
-  - vddrfa0p8-supply
-  - vddrfa1p2-supply
-  - vddrfa1p8-supply
-  - vddpcie0p9-supply
-  - vddpcie1p8-supply
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - pci17cb,1107
+    then:
+      required:
+        - vddaon-supply
+        - vddwlcx-supply
+        - vddwlmx-supply
+        - vddrfacmn-supply
+        - vddrfa0p8-supply
+        - vddrfa1p2-supply
+        - vddrfa1p8-supply
+        - vddpcie0p9-supply
+        - vddpcie1p8-supply
+
 examples:
   - |
     #include <dt-bindings/clock/qcom,rpmh.h>
@@ -97,3 +184,139 @@ examples:
             };
         };
     };
+
+  - |
+    pcie1 {
+        #address-cells = <3>;
+        #size-cells = <2>;
+
+        pcie@0 {
+            device_type = "pci";
+            reg = <0x0 0x0 0x0 0x0 0x0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            ranges;
+
+            wifi1@0 {
+                compatible = "pci17cb,1109";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+
+                qcom,ath12k-calibration-variant = "RDP433_1";
+
+                wsi {
+                    qcom,wsi-group-id = <0>;
+
+                    ports {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        port@0 {
+                            reg = <0>;
+
+                            wifi1_wsi_tx: endpoint {
+                                remote-endpoint = <&wifi2_wsi_rx>;
+                            };
+                        };
+
+                        port@1 {
+                            reg = <1>;
+
+                            wifi1_wsi_rx: endpoint {
+                                remote-endpoint = <&wifi3_wsi_tx>;
+                            };
+                        };
+                    };
+                };
+            };
+        };
+    };
+
+    pcie2 {
+        #address-cells = <3>;
+        #size-cells = <2>;
+
+        pcie@0 {
+            device_type = "pci";
+            reg = <0x0 0x0 0x0 0x0 0x0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            ranges;
+
+            wifi2@0 {
+                compatible = "pci17cb,1109";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+
+                qcom,ath12k-calibration-variant = "RDP433_2";
+
+                wsi {
+                    qcom,wsi-group-id = <0>;
+
+                    ports {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        port@0 {
+                            reg = <0>;
+
+                            wifi2_wsi_tx: endpoint {
+                                remote-endpoint = <&wifi3_wsi_rx>;
+                            };
+                        };
+
+                        port@1 {
+                            reg = <1>;
+
+                            wifi2_wsi_rx: endpoint {
+                                remote-endpoint = <&wifi1_wsi_tx>;
+                            };
+                        };
+                    };
+                };
+            };
+        };
+    };
+
+    pcie3 {
+        #address-cells = <3>;
+        #size-cells = <2>;
+
+        pcie@0 {
+            device_type = "pci";
+            reg = <0x0 0x0 0x0 0x0 0x0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            ranges;
+
+            wifi3@0 {
+                compatible = "pci17cb,1109";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+
+                qcom,ath12k-calibration-variant = "RDP433_3";
+
+                wsi {
+                    qcom,wsi-group-id = <0>;
+
+                    ports {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        port@0 {
+                            reg = <0>;
+
+                            wifi3_wsi_tx: endpoint {
+                                remote-endpoint = <&wifi1_wsi_rx>;
+                            };
+                        };
+
+                        port@1 {
+                            reg = <1>;
+
+                            wifi3_wsi_rx: endpoint {
+                                remote-endpoint = <&wifi2_wsi_tx>;
+                            };
+                        };
+                    };
+                };
+            };
+        };
+    };
