Re: [PATCH 2/3] power: sequencing: pcie-m2: Match WCN6855 and WCN7851 UART BT variants by subdevice ID

[Wei Deng <wei.deng@oss.qualcomm.com>]

Hi Bart,

On Thu, 16 Jul 2026 06:56:36 -0700, Bartosz Golaszewski wrote:
> On Thu, 9 Jul 2026 09:29:41 +0200, Wei Deng <wei.deng@oss.qualcomm.com> said:
> > The WCN6855 and WCN7851 combo chips are available in M.2 card variants
> > that differ by their BT interface: some expose BT over UART while others
> > expose BT over USB. Both variants use the same PCIe device ID for the
> > WiFi interface, distinguished only by their sub-system device ID.
> >
> > Narrow the matches to UART variants only by using PCI_DEVICE_SUB with
> > their respective sub-system IDs. USB variants no longer match the table
> > and will be handled separately to deassert W_DISABLE2# for USB BT
> > enumeration.
> >
> > Signed-off-by: Wei Deng <wei.deng@oss.qualcomm.com>
>
> Do you want me to queue this independently from patch 3/3?

Yes, this can be queued independently. I'll send a new patch with an
updated commit message — the previous one mentioned "handled separately
to deassert W_DISABLE2# for USB BT enumeration" which was tied to
Patch 3/3. Since we are dropping Patch 3 in favor of Chen-Yu Tsai's
USB hub power sequencing series [1], the commit message should just say
that USB variants no longer trigger UART serdev creation.

[1] https://lore.kernel.org/all/20260715085348.3457359-1-wenst@chromium.org/

-- 
Best Regards,
Wei Deng