[PATCH 0/3] Bluetooth: qca: enable QCC2072 on RB3 Gen 2 Industrial Mezz reworked for BT over UART

The RB3 Gen 2 Industrial mezzanine normally uses the M.2 E-key slot for
Bluetooth over USB. This series enables a reworked Industrial mezzanine
variant where the same M.2 E-key Bluetooth path is routed over UART4
instead.

The BT UART overlay is applied on top of the existing Industrial
mezzanine overlay because the reworked board keeps the common Industrial
mezzanine hardware description and only changes the Bluetooth transport
routing.

To support this board variant, add QCC2072 support to the Qualcomm
Bluetooth UART driver. QCC2072 uses ORN firmware naming, board-id based
NVM lookup, and requires the BCS calibration TLV to be combined with the
selected NVM before download.

The DTS changes also mark the QCS6490 PCIe root port as a PCI bridge so
child nodes below the enumerated PCI topology can be matched. This is
needed for the M.2 E-key connector graph endpoints used by the BT UART
overlay.

The series is split as follows:

- Patch 1 adds QCC2072 support to the Qualcomm Bluetooth UART driver,
  including ORN firmware naming, board-id based NVM lookup and BCS
  calibration TLV download together with the selected NVM.
- Patch 2 marks the QCS6490 PCIe root port as a PCI bridge so the PCI
  subsystem can associate the DT node with the enumerated PCI-to-PCI
  bridge device used by the M.2 E-key graph.
- Patch 3 describes the reworked RB3 Gen 2 Industrial mezzanine BT UART
  path by adding the M.2 E-key connector graph links from port@0 to PCIe
  and from port@3 to UART4, and composes this overlay on top of the
  existing Industrial mezzanine overlay.

This series depends on two M.2 power sequencing changes already posted
upstream. The Eliza EVK series adds the QCC2072 PCI ID to the M.2 E-key
power sequencing driver, which lets the connector power sequence bind to
the enumerated QCC2072 WLAN function:

  https://lore.kernel.org/all/[email protected]/

The Monza wireless series adds the generic hci_qca OF graph handling used
by M.2 Bluetooth devices, so the Bluetooth serdev controller can acquire
the UART power sequence from the M.2 connector graph instead of carrying a
board-specific power-control path in this series:

  https://lore.kernel.org/all/[email protected]/

Tested on RB3 Gen 2 with the reworked Industrial mezzanine. Bluetooth
setup completed successfully over UART4. The QCC2072 NVM and BCS
calibration loading path was verified to request board-specific files
when available and fall back to the default files otherwise.

Signed-off-by: Rahul Samana <[email protected]>
---
Rahul Samana (3):
      Bluetooth: qca: add QCC2072 support
      arm64: dts: qcom: kodiak: mark PCIe root port as bridge
      arm64: dts: qcom: rb3gen2: add Industrial BT UART overlay

 arch/arm64/boot/dts/qcom/Makefile                  |   2 +
 arch/arm64/boot/dts/qcom/kodiak.dtsi               |   1 +
 ...s6490-rb3gen2-industrial-mezzanine-bt-uart.dtso | 133 +++++++++++++++++++++
 drivers/bluetooth/btqca.c                          |  70 ++++++++++-
 drivers/bluetooth/btqca.h                          |   2 +
 drivers/bluetooth/hci_qca.c                        |  24 ++++
 6 files changed, 231 insertions(+), 1 deletion(-)
---
base-commit: 248951ddc14de84de3910f9b13f51491a8cd91df
change-id: 20260723-rb3-industrial-bt-uart-f98acaffc9f5

Best regards,
--  
Rahul Samana <[email protected]>