[PATCH v4 1/2] dt-bindings: usb: dwc3: Document ST STM32MP2 DWC3 xHCI USB controller

[Marek Vasut <marex@nabladev.com>]

The ST STM32MP2 SoC contains single instance of DWC3 USB controller with
glue logic wrapper around it controlled by syscon. Document the glue
logic and DWC3 controller.

Co-developed-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Co-developed-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Co-developed-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Marek Vasut <marex@nabladev.com>
---
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Marek Vasut <marex@nabladev.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Cc: devicetree@vger.kernel.org
Cc: kernel@dh-electronics.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-usb@vger.kernel.org
---
V2: Fix up Sob/Cdb lines
V3: - Document maximum-speed
    - Switch resets to maxItems: 1
    - Drop label from example
    - Use generic over-current-active-low
    - Use ref: snps,dwc3-common.yaml and drop generic dr_mode/maximum-speed/phys/phy-names
V4: - Split this from series arm64: dts: phy: st: usb: Add STM32MP2 USB support
      https://lore.kernel.org/all/20260822074816.548662-1-marex@nabladev.com/
---
 .../bindings/usb/st,stm32mp25-dwc3.yaml       | 97 +++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/st,stm32mp25-dwc3.yaml

diff --git a/Documentation/devicetree/bindings/usb/st,stm32mp25-dwc3.yaml b/Documentation/devicetree/bindings/usb/st,stm32mp25-dwc3.yaml
new file mode 100644
index 0000000000000..96bd557327252
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/st,stm32mp25-dwc3.yaml
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/st,stm32mp25-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 MPU DWC3 USB SoC controller
+
+description:
+  The STM32 MPU DWC3 USB SoC controller block supports both
+  Host(SS/HS/FS/LS) and Device(SS/HS/FS) mode operation
+
+maintainers:
+  - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+  - Marek Vasut <marex@nabladev.com>
+
+allOf:
+  - $ref: snps,dwc3-common.yaml#
+
+properties:
+  compatible:
+    const: st,stm32mp25-dwc3
+
+  reg:
+    maxItems: 1
+
+  access-controllers:
+    maxItems: 1
+
+  clocks:
+    minItems: 3
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: ref
+      - const: bus_early
+      - const: suspend
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  over-current-active-low:
+    type: boolean
+    description: Over-Current signal polarity is active-low
+
+  st,syscfg:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: Phandle to system configuration controller.
+    items:
+      - items:
+          - description: phandle to syscfg
+          - description: USB3DR control offset within syscfg
+
+  st,enable-port-power-control:
+    type: boolean
+    description: Enable Host-Mode Port Power Control (bit-3 of capability param HCCPARAMS)
+
+  st,vbusen-active-low:
+    type: boolean
+    description: VBUS-ENABLE signal polarity is active-low
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+  - phys
+  - phy-names
+  - resets
+  - st,syscfg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
+
+    usb@48300000 {
+        compatible = "st,stm32mp25-dwc3";
+        reg = <0x48300000 0x100000>;
+        clocks = <&rcc CK_KER_USB2PHY2>, <&rcc CK_BUS_USB3DR>, <&rcc CK_KER_USB2PHY2>;
+        clock-names = "ref", "bus_early", "suspend";
+        interrupts = <GIC_SPI 228 IRQ_TYPE_LEVEL_HIGH>;
+        phys = <&usb2_phy>, <&usb3_phy>;
+        phy-names = "usb2-phy", "usb3-phy";
+        resets = <&rcc USB3DR_R>;
+        over-current-active-low;
+        st,syscfg = <&syscfg 0x4800>;
+        st,vbusen-active-low;
+    };
-- 
2.53.0