[PATCH v5 1/2] usb: dt-bindings: ti,twl4030-usb: convert to DT schema

Convert the legacy TXT binding for the TWL4030 USB module
to the modern YAML DT schema format. This adds formal validation
and improves documentation using a conditional schema.
Signed-off-by: Jihed Chaibi <jihed.chaibi.dev@xxxxxxxxx>
---
Changes in v5:
 - Split combined twlxxxx-usb binding into a dedicated file for
 twl4030-usb per maintainer feedback.
 - Used more accurate header for interrupt macros.
 - Improved formatting in the examples.
Changes in v4:
 - This patch is split from larger series per maintainer feedback.
 - v3 link:
 https://lore.kernel.org/all/20250816021523.167049-1-jihed.chaibi.dev@xxxxxxxxx/
 - Removed i2c node as it wasn't required by the old binding file.
 - Updated node names to 'usb' and 'usb-phy' in the examples to follow
 generic naming conventions per the Device Tree specification.
 - Replaced raw interrupt values with standard defines for clarity.
 - Improved formatting in the examples for clarity and consistency.
Changes in v3:
 - No changes.
Changes in v2:
 - Added '#phy-cells' property to support PHY framework integration.
---
 .../bindings/usb/ti,twl4030-usb.yaml | 76 +++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/ti,twl4030-usb.yaml
diff --git a/Documentation/devicetree/bindings/usb/ti,twl4030-usb.yaml b/Documentation/devicetree/bindings/usb/ti,twl4030-usb.yaml
new file mode 100644
index 000000000..a2d3c5f60
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ti,twl4030-usb.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/ti,twl4030-usb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TWL4030 USB PHY and Comparator
+
+maintainers:
+ - Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx>
+
+description:
+ Bindings for the USB PHY and comparator module found within the
+ TWL4030 family of companion chips. If a sibling node is compatible with
+ "ti,twl4030-bci", the driver for that node will query this device for
+ USB power status.
+
+properties:
+ compatible:
+ const: ti,twl4030-usb
+
+ interrupts:
+ description:
+ Interrupt numbers to the CPU for ID and VBUS events. The first interrupt
+ is the OTG interrupt for both ID and VBUS events. The second interrupt
+ is optional.
+ minItems: 1
+ maxItems: 2
+
+ usb1v5-supply:
+ description: Phandle to the vusb1v5 regulator.
+
+ usb1v8-supply:
+ description: Phandle to the vusb1v8 regulator.
+
+ usb3v1-supply:
+ description: Phandle to the vusb3v1 regulator.
+
+ usb_mode:
+ description: |
+ The mode used by the PHY to connect to the controller:
+ 1: ULPI mode
+ 2: CEA2011_3PIN mode
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 2]
+
+ '#phy-cells':
+ const: 0
+
+required:
+ - compatible
+ - interrupts
+ - usb1v5-supply
+ - usb1v8-supply
+ - usb3v1-supply
+ - usb_mode
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ usb-phy {
+ compatible = "ti,twl4030-usb";
+
+ interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&gic>;
+
+ usb1v5-supply = <&reg_vusb1v5>;
+ usb1v8-supply = <&reg_vusb1v8>;
+ usb3v1-supply = <&reg_vusb3v1>;
+ usb_mode = <1>;
+
+ #phy-cells = <0>;
+ };
-- 
2.39.5