dt-bindings: phy: add NXP PTN3222 eUSB2 to USB2 redriver

The NXP PTN3222 is the single-port eUSB2 to USB2 redriver that performs
translation between eUSB2 and USB2 signalling schemes. It supports all
three data rates: Low Speed, Full Speed and High Speed.

Reviewed-by: Conor Dooley <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Stephan Gerhold <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/phy/nxp,ptn3222.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/nxp,ptn3222.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PTN3222 1-port eUSB2 to USB2 redriver
+
+maintainers:
+  - Dmitry Baryshkov <[e-mail]>
+
+properties:
+  compatible:
+    enum:
+      - nxp,ptn3222
+
+  reg:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+  vdd1v8-supply:
+    description: power supply (1.8V)
+
+  vdd3v3-supply:
+    description: power supply (3.3V)
+
+  reset-gpios: true
+
+required:
+  - compatible
+  - reg
+  - '#phy-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        redriver@4f {
+            compatible = "nxp,ptn3222";
+            reg = <0x4f>;
+            #phy-cells = <0>;
+            vdd3v3-supply = <&vreg_3p3>;
+            vdd1v8-supply = <&vreg_1p8>;
+            reset-gpios = <&gpio_reset GPIO_ACTIVE_LOW>;
+        };
+    };
+...