[PATCH v3 5/6] usb: dt-bindings: ti,twlxxxx-usb: convert to DT schema

[Jihed Chaibi <jihed.chaibi.dev@gmail.com>]

Convert the legacy TXT binding for the TWL4030/6030 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@gmail.com>

---
Changes in v3:
 - No changes.

Changes in v2:
 - Added '#phy-cells' property to support PHY framework integration.
---
 .../bindings/usb/ti,twlxxxx-usb.yaml          | 125 ++++++++++++++++++
 .../devicetree/bindings/usb/twlxxxx-usb.txt   |  43 ------
 2 files changed, 125 insertions(+), 43 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/usb/ti,twlxxxx-usb.yaml
 delete mode 100644 Documentation/devicetree/bindings/usb/twlxxxx-usb.txt

diff --git a/Documentation/devicetree/bindings/usb/ti,twlxxxx-usb.yaml b/Documentation/devicetree/bindings/usb/ti,twlxxxx-usb.yaml
new file mode 100644
index 000000000..48ff5b732
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ti,twlxxxx-usb.yaml
@@ -0,0 +1,125 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/ti,twlxxxx-usb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TWL4030/6030 USB PHY and Comparator
+
+maintainers:
+  - Peter Ujfalusi <peter.ujfalusi@gmail.com>
+
+description: |
+  Bindings for the USB PHY and comparator module found within the
+  TWL4030 and TWL6030 family of companion chips.
+
+  TWL6030: USB COMPARATOR
+  TWL4030: USB COMPARATOR & PHY
+
+  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:
+    enum:
+      - ti,twl4030-usb
+      - ti,twl6030-usb
+
+  interrupts:
+    description: |
+      Interrupts for ID and VBUS events.
+      For "ti,twl6030-usb", two interrupts must be specified:
+        - The first is the OTG interrupt for ID events (host mode).
+        - The second is the USB interrupt for VBUS events (device mode).
+      For "ti,twl4030-usb", one or two interrupts can be specified:
+        - The first is the OTG interrupt for both ID and VBUS events.
+        - The second is optional.
+    minItems: 1
+    maxItems: 2
+
+  usb-supply:
+    description:
+      Phandle to the VUSB regulator. For TWL6030, this should be the 'vusb'
+      regulator. For TWL6032 subclass, it should be the 'ldousb' regulator.
+
+  usb1v5-supply:
+    description: Phandle to the VUSB1V5 regulator (for TWL4030).
+
+  usb1v8-supply:
+    description: Phandle to the VUSB1V8 regulator (for TWL4030).
+
+  usb3v1-supply:
+    description: Phandle to the USB3V1 regulator (for TWL4030).
+
+  usb_mode:
+    description: |
+      The mode used by the PHY (TWL4030 ONLY) 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
+
+additionalProperties: false
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: ti,twl6030-usb
+then:
+  required:
+    - usb-supply
+  properties:
+    interrupts:
+      minItems: 2
+else:
+  required:
+    - usb1v5-supply
+    - usb1v8-supply
+    - usb3v1-supply
+    - usb_mode
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        twl@48 {
+            reg = <0x48>;
+
+            usb_phy: twl4030-usb {
+                compatible = "ti,twl4030-usb";
+                interrupts = <10 4>;  // 1 interrupt: OTG (ID & VBUS events)
+                interrupt-parent = <&gic>;
+                usb1v5-supply = <&reg_vusb1v5>;
+                usb1v8-supply = <&reg_vusb1v8>;
+                usb3v1-supply  = <&reg_vusb3v1>;
+                usb_mode = <1>;
+                #phy-cells = <0>;
+            };
+        };
+    };
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        twl@48 {
+            reg = <0x48>;
+
+            usb_comp: twl6030-usb {
+                compatible = "ti,twl6030-usb";
+                interrupts = <4 4>, <10 4>;  // 2 interrupts: OTG & USB
+                interrupt-parent = <&gic>;
+                usb-supply = <&reg_vusb>;
+            };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/usb/twlxxxx-usb.txt b/Documentation/devicetree/bindings/usb/twlxxxx-usb.txt
deleted file mode 100644
index 17327a296..000000000
--- a/Documentation/devicetree/bindings/usb/twlxxxx-usb.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-USB COMPARATOR OF TWL CHIPS
-
-TWL6030 USB COMPARATOR
- - compatible : Should be "ti,twl6030-usb"
- - interrupts : Two interrupt numbers to the cpu should be specified. First
-   interrupt number is the otg interrupt number that raises ID interrupts when
-   the controller has to act as host and the second interrupt number is the
-   usb interrupt number that raises VBUS interrupts when the controller has to
-   act as device
- - usb-supply : phandle to the regulator device tree node. It should be vusb
-   if it is twl6030 or ldousb if it is twl6032 subclass.
-
-twl6030-usb {
-	compatible = "ti,twl6030-usb";
-	interrupts = < 4 10 >;
-};
-
-Board specific device node entry
-&twl6030-usb {
-	usb-supply = <&vusb>;
-};
-
-TWL4030 USB PHY AND COMPARATOR
- - compatible : Should be "ti,twl4030-usb"
- - interrupts : The interrupt numbers to the cpu should be specified. First
-   interrupt number is the otg interrupt number that raises ID interrupts
-   and VBUS interrupts. The second interrupt number is optional.
- - <supply-name>-supply : phandle to the regulator device tree node.
-   <supply-name> should be vusb1v5, vusb1v8 and vusb3v1
- - usb_mode : The mode used by the phy to connect to the controller. "1"
-   specifies "ULPI" mode and "2" specifies "CEA2011_3PIN" mode.
-
-If a sibling node is compatible "ti,twl4030-bci", then it will find
-this device and query it for USB power status.
-
-twl4030-usb {
-	compatible = "ti,twl4030-usb";
-	interrupts = < 10 4 >;
-	usb1v5-supply = <&vusb1v5>;
-	usb1v8-supply = <&vusb1v8>;
-	usb3v1-supply = <&vusb3v1>;
-	usb_mode = <1>;
-};
-- 
2.39.5