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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/ti,phy-gmii-sel.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: CPSW Port's Interface Mode Selection PHY
+
+maintainers:
+  - Kishon Vijay Abraham I <kishon@ti.com>
+
+description: |
+  TI am335x/am437x/dra7(am5)/dm814x CPSW3G Ethernet Subsystem supports
+  two 10/100/1000 Ethernet ports with selectable G/MII, RMII, and RGMII interfaces.
+  The interface mode is selected by configuring the MII mode selection register(s)
+  (GMII_SEL) in the System Control Module chapter (SCM). GMII_SEL register(s) and
+  bit fields placement in SCM are different between SoCs while fields meaning
+  is the same.
+                                               +--------------+
+        +-------------------------------+      |SCM           |
+        |                     CPSW      |      |  +---------+ |
+        |        +--------------------------------+gmii_sel | |
+        |        |                      |      |  +---------+ |
+        |   +----v---+     +--------+   |      +--------------+
+        |   |Port 1..<--+-->GMII/MII<------->
+        |   |        |  |  |        |   |
+        |   +--------+  |  +--------+   |
+        |               |               |
+        |               |  +--------+   |
+        |               |  | RMII   <------->
+        |               +-->        |   |
+        |               |  +--------+   |
+        |               |               |
+        |               |  +--------+   |
+        |               |  | RGMII  <------->
+        |               +-->        |   |
+        |                  +--------+   |
+        +-------------------------------+
+
+  CPSW Port's Interface Mode Selection PHY describes MII interface mode between
+  CPSW Port and Ethernet PHY which depends on Eth PHY and board configuration.
+  |
+  CPSW Port's Interface Mode Selection PHY device should defined as child device
+  of SCM node (scm_conf) and can be attached to each CPSW port node using standard
+  PHY bindings.
+
+properties:
+  compatible:
+    enum:
+      - ti,am3352-phy-gmii-sel
+      - ti,dra7xx-phy-gmii-sel
+      - ti,am43xx-phy-gmii-sel
+      - ti,dm814-phy-gmii-sel
+      - ti,am654-phy-gmii-sel
+      - ti,j7200-cpsw5g-phy-gmii-sel
+      - ti,j721e-cpsw9g-phy-gmii-sel
+      - ti,j784s4-cpsw9g-phy-gmii-sel
+
+  reg:
+    maxItems: 1
+
+  '#phy-cells': true
+
+  ti,qsgmii-main-ports:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: |
+      Required only for QSGMII mode. Array to select the port/s for QSGMII
+      main mode. The size of the array corresponds to the number of QSGMII
+      interfaces and thus, the number of distinct QSGMII main ports,
+      supported by the device. If the device supports two QSGMII interfaces
+      but only one QSGMII interface is desired, repeat the QSGMII main port
+      value corresponding to the QSGMII interface in the array.
+    minItems: 1
+    maxItems: 2
+    items:
+      minimum: 1
+      maximum: 8
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,dra7xx-phy-gmii-sel
+              - ti,dm814-phy-gmii-sel
+              - ti,am654-phy-gmii-sel
+              - ti,j7200-cpsw5g-phy-gmii-sel
+              - ti,j721e-cpsw9g-phy-gmii-sel
+              - ti,j784s4-cpsw9g-phy-gmii-sel
+    then:
+      properties:
+        '#phy-cells':
+          const: 1
+          description: CPSW port number (starting from 1)
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,j7200-cpsw5g-phy-gmii-sel
+    then:
+      properties:
+        ti,qsgmii-main-ports:
+          maxItems: 1
+          items:
+            minimum: 1
+            maximum: 4
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,j721e-cpsw9g-phy-gmii-sel
+              - ti,j784s4-cpsw9g-phy-gmii-sel
+    then:
+      properties:
+        ti,qsgmii-main-ports:
+          minItems: 2
+          maxItems: 2
+          items:
+            minimum: 1
+            maximum: 8
+
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - ti,j7200-cpsw5g-phy-gmii-sel
+                - ti,j721e-cpsw9g-phy-gmii-sel
+                - ti,j784s4-cpsw9g-phy-gmii-sel
+    then:
+      properties:
+        ti,qsgmii-main-ports: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,am3352-phy-gmii-sel
+              - ti,am43xx-phy-gmii-sel
+    then:
+      properties:
+        '#phy-cells':
+          const: 2
+          description: |
+            - CPSW port number (starting from 1)
+            - RMII refclk mode
+
+required:
+  - compatible
+  - reg
+  - '#phy-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    phy_gmii_sel: phy@650 {
+        compatible = "ti,am3352-phy-gmii-sel";
+        reg = <0x650 0x4>;
+        #phy-cells = <2>;
+    };