power: sequencing: pcie-m2: Match WCN6855 and WCN7851 UART BT variants by subdevice ID

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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.

The bare PCI_DEVICE() entries match all sub-system IDs, so both UART and
USB variants hit the same table entry and trigger UART serdev creation.
For USB variants this is wrong — there is no UART BT interface on such
a card, and the serdev probe will fail.

Narrow the matches to UART variants only by using PCI_DEVICE_SUB with
their respective sub-system IDs, so USB variants no longer trigger
UART serdev creation.

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Wei Deng <wei.deng@oss.qualcomm.com>
Link: https://patch.msgid.link/20260724-hamoa-m2-sub-id-v2-v3-1-af97de70bbbe@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

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Wei Deng 2026-07-24 13:51:56 +05:30 • committed by Bartosz Golaszewski

parent 1656f4f2eb

commit a39ac4651e

1 changed files with 4 additions and 2 deletions

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drivers/power/sequencing/pwrseq-pcie-m2.c

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