# Configure UEFI USB

UEFI USB code is open source and integrates with EDK2 with minimal QTI
customizations.

When you configure UEFI USB, account for the following constraints:

- UEFI does no USB power management.
- UEFI has no scheduler, multithreading, or interrupts; all operations
use polling.
- The USB maximum speed in UEFI is USB3 Gen2.
- The USB retimer control migrates to the SoCCPv2 charger PD firmware
for consistency with EC-based designs and increased security.

## Related

- [Debug the USB interface](https://docs.qualcomm.com/doc/80-A0399-8/topic/debug-usb.html)
- [Troubleshoot the USB interface](https://docs.qualcomm.com/doc/80-A0399-8/topic/troubleshoot-usb.html)
- [References](https://docs.qualcomm.com/doc/80-A0399-8/topic/references.html)

Last Published: Sep 17, 2026

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