dt-bindings: phy: Add qcom,snps-eusb2-phy schema file

The SM8550 SoC uses Synopsis eUSB2 PHY. Add a dt-binding schema
for the new driver.
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230208183421.2874423-2-abel.vesa@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/qcom,snps-eusb2-phy.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,snps-eusb2-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SNPS eUSB2 phy controller
+
+maintainers:
+  - Abel Vesa <abel.vesa@linaro.org>
+
+description:
+  eUSB2 controller supports LS/FS/HS usb connectivity on Qualcomm chipsets.
+
+properties:
+  compatible:
+    const: qcom,sm8550-snps-eusb2-phy
+
+  reg:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+  clocks:
+    items:
+      - description: ref
+
+  clock-names:
+    items:
+      - const: ref
+
+  resets:
+    maxItems: 1
+
+  vdd-supply:
+    description:
+      Phandle to 0.88V regulator supply to PHY digital circuit.
+
+  vdda12-supply:
+    description:
+      Phandle to 1.2V regulator supply to PHY refclk pll block.
+
+required:
+  - compatible
+  - reg
+  - "#phy-cells"
+  - clocks
+  - clock-names
+  - vdd-supply
+  - vdda12-supply
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,sm8550-gcc.h>
+    #include <dt-bindings/clock/qcom,rpmh.h>
+    #include <dt-bindings/clock/qcom,sm8550-tcsr.h>
+
+    usb_1_hsphy: phy@88e3000 {
+        compatible = "qcom,sm8550-snps-eusb2-phy";
+        reg = <0x88e3000 0x154>;
+        #phy-cells = <0>;
+
+        clocks = <&tcsrcc TCSR_USB2_CLKREF_EN>;
+        clock-names = "ref";
+
+        vdd-supply = <&vreg_l1e_0p88>;
+        vdda12-supply = <&vreg_l3e_1p2>;
+
+        resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>;
+    };