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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/wireless/qcom,ath12k-wsi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies ath12k wireless devices (PCIe) with WSI interface
+
+maintainers:
+  - Jeff Johnson <[email protected]>
+  - Kalle Valo <[email protected]>
+
+description: |
+  Qualcomm Technologies IEEE 802.11be PCIe devices with WSI interface.
+
+  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.
+
+  The WSI interface includes TX and RX ports, which are used to connect
+  multiple WSI-supported devices together, forming a WSI group.
+
+  Diagram to represent one WSI connection (one WSI group) among
+  three devices.
+
+           +-------+        +-------+        +-------+
+           | pcie1 |        | pcie2 |        | pcie3 |
+           |       |        |       |        |       |
+    +----->|  wsi  |------->|  wsi  |------->|  wsi  |-----+
+    |      | grp 0 |        | grp 0 |        | grp 0 |     |
+    |      +-------+        +-------+        +-------+     |
+    +------------------------------------------------------+
+
+  Diagram to represent two WSI connections (two separate WSI groups)
+  among four devices.
+
+       +-------+    +-------+          +-------+    +-------+
+       | pcie0 |    | pcie1 |          | pcie2 |    | pcie3 |
+       |       |    |       |          |       |    |       |
+   +-->|  wsi  |--->|  wsi  |--+   +-->|  wsi  |--->|  wsi  |--+
+   |   | grp 0 |    | grp 0 |  |   |   | grp 1 |    | grp 1 |  |
+   |   +-------+    +-------+  |   |   +-------+    +-------+  |
+   +---------------------------+   +---------------------------+
+
+properties:
+  compatible:
+    enum:
+      - 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
+
+  qcom,wsi-controller:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      The WSI controller device in the WSI group aids (is capable) to
+      synchronize the Timing Synchronization Function (TSF) clock across
+      all devices in the WSI group.
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    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:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    pcie {
+        #address-cells = <3>;
+        #size-cells = <2>;
+
+        pcie@0 {
+            device_type = "pci";
+            reg = <0x0 0x0 0x0 0x0 0x0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            ranges;
+
+            wifi@0 {
+                compatible = "pci17cb,1109";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+
+                qcom,ath12k-calibration-variant = "RDP433_1";
+
+                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>;
+                        };
+                    };
+                };
+            };
+        };
+
+        pcie@1 {
+            device_type = "pci";
+            reg = <0x0 0x0 0x1 0x0 0x0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            ranges;
+
+            wifi@0 {
+                compatible = "pci17cb,1109";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+
+                qcom,ath12k-calibration-variant = "RDP433_2";
+                qcom,wsi-controller;
+
+                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>;
+                        };
+                    };
+                };
+            };
+        };
+
+        pcie@2 {
+            device_type = "pci";
+            reg = <0x0 0x0 0x2 0x0 0x0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            ranges;
+
+            wifi@0 {
+                compatible = "pci17cb,1109";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+
+                qcom,ath12k-calibration-variant = "RDP433_3";
+
+                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>;
+                        };
+                    };
+                };
+            };
+        };
+    };