Re: [PATCH v7 1/2] usb: xhci-pci: add AMD Promontory 21 PCI glue

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, May 20, 2026 at 07:18:49AM -0700, Guenter Roeck wrote:
> On Tue, May 19, 2026 at 09:07:31AM +0900, Jihong Min wrote:
> > AMD Promontory 21 (PROM21) xHCI PCI functions use the common xhci-pci
> > core for USB operation, but also expose controller-specific sensor data.
> > Add a small PROM21 PCI glue driver for AMD 1022:43fc and 1022:43fd
> > controllers.
> > 
> > The glue delegates USB host operation to the common xhci-pci core and
> > publishes a "hwmon" auxiliary device with parent-provided MMIO data.
> > Auxiliary device creation failure is logged but does not fail the xHCI
> > probe.
> > 
> > Make the PROM21 glue a hidden Kconfig tristate driven by the user-visible
> > SENSORS_PROM21_XHCI option. If sensor support is disabled, generic
> > xhci-pci binds PROM21 controllers normally. If sensor support is enabled,
> > the glue follows USB_XHCI_PCI.
> > 
> > This keeps the auxiliary device available for a modular sensor driver while
> > avoiding a built-in xhci-pci core handing PROM21 controllers to a glue
> > driver that is only available as a module during initramfs.
> > 
> > Assisted-by: Codex:gpt-5.5
> > Signed-off-by: Jihong Min <hurryman2212@gmail.com>
> > Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
> > Tested-by: Yaroslav Isakov <yaroslav.isakov@gmail.com>
> 
> Acked-by: Guenter Roeck <linux@roeck-us.net>
> 
> The two patches should be applied together. For now I will assume that
> they will both be applied through a usb tree since this patch touches
> common usb code.

Sounds good, I'll go take it now, thanks.

greg k-h