[PATCH v2 05/16] usb: hub: Associate port@ fwnode with USB port device

Bartosz Golaszewski brgl at kernel.org
Thu Jun 11 01:20:58 PDT 2026


On Wed, 10 Jun 2026 16:16:12 +0200, Andy Shevchenko
<andriy.shevchenko at linux.intel.com> said:
> On Wed, Jun 10, 2026 at 04:40:39PM +0800, Chen-Yu Tsai wrote:
>> When a USB hub port is connected to a connector in a firmware node
>> graph, the port itself has a node in the graph.
>>
>> Associate the port's firmware node with the USB port's device,
>> usb_port::dev. This is used in later changes for the M.2 slot power
>> sequencing provider to match against the requesting port.
>
> Okay, would this affect ACPI-based systems? if so, how?
> Can you elaborate on that, please?
>

Is it possible that there's an ACPI device node associated with the port like
on some DT systems? I don't think so and there should be no impact IMO but I
also don't know enough about ACPI.

Bart



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