dt-bindings: usb: Add binding for PS5511 hub controller

Parade PS5511 is USB hub with 4 USB 3.2 compliant 5Gbps downstream(DS)
ports, and 1 extra USB 2.0 downstream port. The hub has one reset pin
control and two power supplies (3V3 and 1V1).

Signed-off-by: Pin-yen Lin <[e-mail]>
Reviewed-by: "Rob Herring (Arm)" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/parade,ps5511.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/parade,ps5511.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Parade PS5511 4+1 Port USB 3.2 Gen 1 Hub Controller
+
+maintainers:
+  - Pin-yen Lin <[e-mail]>
+
+properties:
+  compatible:
+    enum:
+      - usb1da0,5511
+      - usb1da0,55a1
+
+  reset-gpios:
+    items:
+      - description: GPIO specifier for RESETB pin.
+
+  vddd11-supply:
+    description:
+      1V1 power supply to the hub
+
+  vdd33-supply:
+    description:
+      3V3 power supply to the hub
+
+  peer-hub: true
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    patternProperties:
+      '^port@':
+        $ref: /schemas/graph.yaml#/properties/port
+
+        properties:
+          reg:
+            minimum: 1
+            maximum: 5
+
+additionalProperties:
+  properties:
+    reg:
+      minimum: 1
+      maximum: 5
+
+required:
+  - peer-hub
+
+allOf:
+  - $ref: usb-hub.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            enum:
+              - usb1da0,55a1
+    then:
+      properties:
+        ports:
+          properties:
+            port@5: false
+
+      patternProperties:
+        '^.*@5$': false
+
+examples:
+  - |
+    usb {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* 2.0 hub on port 1 */
+        hub_2_0: hub@1 {
+            compatible = "usb1da0,55a1";
+            reg = <1>;
+            peer-hub = <&hub_3_0>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            /* USB 2.0 device on port 5 */
+            device@5 {
+                reg = <5>;
+                compatible = "usb123,4567";
+            };
+        };
+
+        /* 3.0 hub on port 2 */
+        hub_3_0: hub@2 {
+            compatible = "usb1da0,5511";
+            reg = <2>;
+            peer-hub = <&hub_2_0>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                /* Type-A connector on port 3 */
+                port@3 {
+                    reg = <3>;
+                    endpoint {
+                        remote-endpoint = <&usb_a0_ss>;
+                    };
+                };
+            };
+        };
+    };