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HATs and other add-ons • Re: connecting multiple pci hats together?

$
0
0
lspci -t
-+-[0000:00]-
+-[0001:00]---00.0-[01-04]----00.0-[02-09]--+-03.0-[03-08]----00.0-[04-08]--+-01.0-[05]--
|.....................................................................|...............................................+-03.0-[06]--
|.....................................................................|...............................................+-05.0-[07]--
|.....................................................................|................................................\-07.0-[08]--
|.....................................................................\-07.0-[09]--
\-[0002:00]---00.0-[01]----00.0

what is this telling me?
The connection tree of your PCIe devices. However it's not what I'd expect from your earlier posts.

For comparison here's what I'm getting.

From a Pi5 with a single NVMe drive:

Code:

pi@devpi:~ $ sudo lspci -t-[0001:00]---00.0-[01]----00.0-[0002:00]---00.0-[01]----00.0
From a CM4 with one four port PCIe switch and three PCIe cards:

Code:

pi@bugarup:~ $ lspci -t-[0000:00]---00.0-[01-06]----00.0-[02-06]--+-01.0-[03]----00.0                                           +-03.0-[04]--                                           +-05.0-[05]----00.0                                           \-07.0-[06]----00.0

Statistics: Posted by thagrol — Sun Aug 03, 2025 1:12 pm



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