tegrakernel/kernel/kernel-4.9/Documentation/devicetree/bindings/usb/nvidia,tegra186-usb-cd.txt

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Device tree binding for NVIDIA Tegra USB charger detection driver (USB_CD)
============================
The Tegra USB charger detection driver supports BC1.2 protocol for various USB
charger detection.
Required properties:
--------------------
- compatible: For Tegra186, must contain "nvidia,tegra186-usb-cd".
Required properties for Tegra186:
---------------------------------
- phys: Must contain a single entry for the UTMI phy of OTG port
- phy-names: Must be "otg-phy".
Optional properties:
--------------------
- dcp-current-limit-ua : Charging current limit for DCP in uA
- qc2-current-limit-ua : Charging current limit for QC2 in uA
Example:
--------
usb_cd {
compatible = "nvidia,tegra186-usb-cd";
phys = <&padctl TEGRA_PADCTL_PHY_UTMI_P(0)>;
phy-names = "otg-phy";
};