---
title: kIOUSBTopologyRootPort
framework: USBDriverKit
role: symbol
role_heading: Enumeration Case
platforms: [driverkit 19.0+]
path: usbdriverkit/tiousbtopology/kiousbtopologyrootport
---

# kIOUSBTopologyRootPort

## Declaration

```occ
kIOUSBTopologyRootPort
```