[PATCH v3 05/13] usb: hub: Associate port@ fwnode with USB port device

[Chen-Yu Tsai]

On Fri, Jul 3, 2026 at 9:02 PM Andy Shevchenko
<andriy.shevchenko at linux.intel.com> wrote:
>
> On Fri, Jul 03, 2026 at 07:03:06PM +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.
> >
> > To avoid potential conflicts with ACPI firmware nodes and then causing
> > power management issues, only assign the firmware node if the hub's
> > firmware node is not an ACPI firmware node.
>
> Now I'm more confident that it does not mess up with ACPI case.
> Reviewed-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>

Thank you and Bartosz for the reviews.

FTR Sashiko pointed out that this is likely leaking a fwnode reference.
I will add a fwnode_handle_put() call to usb_hub_remove_port_device()
in the next version.


ChenYu