@@ -0,0 +1,178 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/st,stm32-combophy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32MP25 USB3/PCIe COMBOPHY
+
+maintainers:
+  - Christian Bruel <christian.bruel@foss.st.com>
+
+description: |
+  Single lane PHY shared (exclusive) between the USB3 and PCIe controllers.
+  Supports 5Gbit/s for USB3 and PCIe gen2 or 2.5Gbit/s for PCIe gen1.
+
+properties:
+  compatible:
+    const: st,stm32mp25-combophy
+
+  reg:
+    maxItems: 1
+
+  st,syscfg:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: Phandle to the SYSCON entry required for configuring PCIe
+      or USB3.
+
+  "#phy-cells":
+    const: 1
+    description: |
+      The cells contain the following arguments.
+
+      - description: The PHY type
+          enum:
+            - PHY_TYPE_USB3
+            - PHY_TYPE_PCIE
+
+  clocks:
+    anyOf:
+      - description: apb-clk Bus clock mandatory to access registers.
+      - description: ker-clk Internal RCC reference clock for USB3 or PCIe
+      - description: pad-clk Optional on board clock input for PCIe only. Typically an
+                     external 100Mhz oscillator wired on dedicated CLKIN pad. Used as reference
+                     clock input instead of the ker-clk
+
+  clock-names:
+    oneOf:
+      - items:
+          - const: apb-clk
+          - const: ker-clk
+
+      - items:
+          - const: apb-clk
+          - const: ker-clk
+          - const: pad-clk
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: phy-rst
+
+  power-domains:
+    maxItems: 1
+
+  st,ssc-on:
+    type: boolean
+    description:
+      A boolean property whose presence indicates that the SSC for common clock
+      needs to be set.
+
+  st,rx_equalizer:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 7
+    default: 2
+    description:
+      A 3 bit value describing internal filter settings for the RX equalizer.
+
+  st,output-micro-ohms:
+    minimum: 3999000
+    maximum: 6090000
+    default: 4968000
+    description:
+      A value property to tune the Single Ended Output Impedance, simulations results
+      at 25C for a VDDP=0.8V. The hardware accepts discrete values in this range.
+
+  st,output-vswing-microvolt:
+    minimum: 442000
+    maximum: 803000
+    default: 803000
+    description:
+      A value property in microvolt to tune the Single Ended Output Voltage Swing to change the
+      Vlo, Vhi for a VDDP = 0.8V. The hardware accepts discrete values in this range.
+
+  wakeup-source: true
+
+  interrupts:
+    maxItems: 1
+    description: interrupt used for wakeup
+
+  access-controllers:
+    minItems: 1
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - st,syscfg
+  - '#phy-cells'
+  - resets
+  - reset-names
+  - clocks
+  - clock-names
+
+allOf:
+  - if:
+      required:
+        - wakeup-source
+    then:
+      anyOf:
+        - required: [interrupts]
+        - required: [interrupts-extended]
+
+additionalProperties: false
+
+examples:
+  - |
+    // Example 1: COMBOPHY configured to use internal reference clock
+    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
+
+    combophy_internal: phy@480c0000 {
+        compatible = "st,stm32mp25-combophy";
+        reg = <0x480c0000 0x1000>;
+        #phy-cells = <1>;
+        clocks = <&rcc CK_BUS_USB3PCIEPHY>, <&rcc CK_KER_USB3PCIEPHY>;
+        clock-names = "apb-clk", "ker-clk";
+        resets = <&rcc USB3PCIEPHY_R>;
+        reset-names = "phy-rst";
+        st,syscfg = <&syscfg>;
+        access-controllers = <&rifsc 67>;
+        power-domains = <&CLUSTER_PD>;
+        wakeup-source;
+        interrupts-extended = <&exti1 45 IRQ_TYPE_EDGE_FALLING>;
+    };
+
+  - |
+    // Example 2: COMBOPHY configured to use extrenal 100MHz reference clock
+    // on CLKIN pad for PCIe
+    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
+
+    clocks {
+        pad_clk: pad-clk {
+            #clock-cells = <0>;
+            compatible = "fixed-clock";
+            clock-frequency = <100000000>;
+        };
+    };
+
+    combophy_pad: phy@480c0000 {
+        compatible = "st,stm32mp25-combophy";
+        reg = <0x480c0000 0x1000>;
+        #phy-cells = <1>;
+        clocks = <&rcc CK_BUS_USB3PCIEPHY>, <&rcc CK_KER_USB3PCIEPHY>, <&pad_clk>;
+        clock-names = "apb-clk", "ker-clk", "pad-clk";
+        resets = <&rcc USB3PCIEPHY_R>;
+        reset-names = "phy-rst";
+        st,syscfg = <&syscfg>;
+        access-controllers = <&rifsc 67>;
+        power-domains = <&CLUSTER_PD>;
+        wakeup-source;
+        interrupts-extended = <&exti1 45 IRQ_TYPE_EDGE_FALLING>;
+    };
+...