dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/phy/amlogic,meson8b-usb2-phy.yaml

@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/phy/amlogic,meson8b-usb2-phy.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson8, Meson8b, Meson8m2 and GXBB USB2 PHY
+
+maintainers:
+  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - amlogic,meson8-usb2-phy
+              - amlogic,meson8b-usb2-phy
+              - amlogic,meson8m2-usb2-phy
+          - const: amlogic,meson-mx-usb2-phy
+      - const: amlogic,meson-gxbb-usb2-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 2
+
+  clock-names:
+    items:
+      - const: usb_general
+      - const: usb
+
+  resets:
+    minItems: 1
+
+  "#phy-cells":
+    const: 0
+
+  phy-supply:
+    description:
+      Phandle to a regulator that provides power to the PHY. This
+      regulator will be managed during the PHY power on/off sequence.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    usb-phy@c0000000 {
+      compatible = "amlogic,meson-gxbb-usb2-phy";
+      reg = <0xc0000000 0x20>;
+      resets = <&reset_usb_phy>;
+      clocks = <&clk_usb_general>, <&reset_usb>;
+      clock-names = "usb_general", "usb";
+      phy-supply = <&usb_vbus>;
+      #phy-cells = <0>;
+    };