Understanding PCI USB controllers for thunderbolt ports

Framework Laptop 13
1

Hi,

I’m trying to better understand what ports and devices each of the USB controllers is responsible for on the framework 13 (intel gen 13). I see four USB controllers. Is there a pattern for how these map on to the thunderbolt ports? Does the controller(s) that handle(s) the thunderbolt ports handle any other devices? Thanks for the help!

00_0d.0 USB controller: Intel Corporation Raptor Lake-P Thunderbolt 4 USB Controller
00_0d.2 USB controller: Intel Corporation Raptor Lake-P Thunderbolt 4 NHI #0
00_0d.3 USB controller: Intel Corporation Raptor Lake-P Thunderbolt 4 NHI #1
00_14.0 USB controller: Intel Corporation Alder Lake PCH USB 3.2 xHCI Host Controller

2

Okay, started looking in to this through trial and error. I plugged a USB devices into all four thunderbolt ports and it looked like the device always connected to this one:

USB controller: Intel Corporation Alder Lake PCH USB 3.2 xHCI Host Controller

Does this seem right?