[PATCH v6 00/11] arm64: dts: monaco-arduino-monza: Add support for LGA WiFi/BT module

[Loic Poulain]

This series describes support for the onboard WiFi/Bluetooth module
present on the Arduino VENTUNO Q (monaco) platform.

The board provides LGA pads for a wireless module. On the VENTUNO Q
these pads are populated with an NFA725B module featuring the
QCA2066 WiFi/BT combo chip. While implemented as an LGA footprint,
the design is functionally compatible with the M.2 Key E.

The NFA725B exposes WiFi over PCIe and Bluetooth over a UART.
Both interfaces are gated through the W_DISABLE1# and W_DISABLE2#
signals, as defined by the M.2 specification and handled here via
the pcie-m2 power sequencer.

This series models the hardware using the existing pwrseq framework
and connector bindings, allowing coordinated PCIe and UART bring-up.

Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxxxxxxxx>
---
Changes in v6:
- Rebase onto v7.3-rc1: drop the now-upstream "power: sequencing: pcie-m2:
  Add QCA2066 (QCNFA765) BT serdev ID" patch and adapt to the
  pwrseq_power_on()/pwrseq_power_off() -> pwrseq_enable()/pwrseq_disable()
  rename that landed in this merge window.
- hci_qca: fully drop struct qca_power and move its fields directly into
  struct qca_serdev, removing the bt_power indirection (Dmitry).
- Pick up Reviewed-by/Acked-by tags from Mani, Bartosz and Dmitry on the
  pwrseq_is_controllable() API, the pcie-m2/qcom-wcn controllability
  reporting, the bt_en_available rework and the M.2 connector support
  patches.
- Drop the pwrseq-m2-bt prerequisite series link, it is now merged upstream
  and included in the v7.3-rc1 base.
- Link to v5: https://lore.kernel.org/r/20260720-monza-wireless-v5-0-69ec6743543c@xxxxxxxxxxxxxxxx

Changes in v5:
- hci_qca: comment why the M.2 'uart' pwrseq lifetime is bound to the serdev
  consumer device instead of using devm_pwrseq_get() on the controller (Bartosz).
- hci_qca: note that dropping the always-on pwrseq handle is not a leak since
  the descriptor is still released by devres (Bartosz).
- Link to v4: https://lore.kernel.org/r/20260716-monza-wireless-v4-0-9b02e6f549d7@xxxxxxxxxxxxxxxx

Changes in v4:
- pwrseq: rename pwrseq_power_is_controllable() to pwrseq_is_controllable() (Bartosz).
- pwrseq: move the is_controllable() callback from the unit to the target (Bartosz).
- pwrseq: add might_sleep() and guard pwrseq_is_controllable() against
  concurrent provider removal with rw_lock, matching pwrseq_power_on/off() (Bartosz).
- pwrseq: clarify the pwrseq_is_controllable() doc (Bartosz)
- hci_qca: lifetime follows the Bluetooth device rather than the UART controller (ChenYu).
- dt-bindings: also add the "qcom,pcie-m2-1620-lga-connector" compatible (Mani).
- arm64: dts: monaco-arduino-monza: rename the 'pcie_bridge_ep' endpoint to 'pcie_ep' (Mani).
- pwrseq: reword commmit message (Mani)
- Link to v3: https://lore.kernel.org/r/20260710-monza-wireless-v3-0-46253587af64@xxxxxxxxxxxxxxxx

Changes in v3:
- Embed bt_power in struct qca_serdev instead of allocating it (Dmitry).
- Add generic pwrseq_is_controllable() API + per-target .is_controllable()
  callback; use it in hci_qca instead of peeking at the W_DISABLE2# property.
- Implement .is_controllable() in the pcie-m2 and qcom-wcn providers.
- Treat non-controllable BT power as always-on.
- Integrate the pending Bluetooth pwrseq patches from Mani.
- Link to v2: https://lore.kernel.org/r/20260702-monza-wireless-v2-0-7b56e2a6a6d4@xxxxxxxxxxxxxxxx

Changes in v2:
- hci_qca: extract M.2 pwrseq into qca_serdev_get_m2_pwrseq() helper, called
  outside the SoC switch; drop duplicated of_graph logic and redundant
  bt_power NULL checks (Dmitry/Mani)
- dts/bindings: use qcom,pcie-m2-1418-lga-connector (fallback
  pcie-m2-e-connector) instead of the generic M.2 E-key compatible (Mani)
- Link to v1: https://lore.kernel.org/r/20260520-monza-wireless-v1-0-9f6942310653@xxxxxxxxxxxxxxxx

---
Loic Poulain (9):
      power: sequencing: Add pwrseq_is_controllable() API
      power: sequencing: pcie-m2: Report power controllability
      power: sequencing: qcom-wcn: Report power controllability
      Bluetooth: hci_qca: Set 'bt_en_available' based on pwrseq power controllability
      Bluetooth: hci_qca: Embed bt_power in struct qca_serdev
      Bluetooth: hci_qca: Support QCA2066 on M.2 connector via pwrseq
      Bluetooth: hci_qca: Flatten struct qca_power into struct qca_serdev
      dt-bindings: connector: pcie-m2-e: Add vendor LGA connector compatible
      arm64: dts: qcom: monaco-arduino-monza: Add QCA2066 M.2 WiFi/BT support

Manivannan Sadhasivam (2):
      Bluetooth: hci_qca: Add M.2 Bluetooth device support using pwrseq
      Bluetooth: hci_qca: Rename 'power_ctrl_enabled' to 'bt_en_available'

 .../bindings/connector/pcie-m2-e-connector.yaml    |   8 +-
 arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts  |  64 ++++++++-
 drivers/bluetooth/hci_qca.c                        | 160 ++++++++++++---------
 drivers/power/sequencing/core.c                    |  49 +++++++
 drivers/power/sequencing/pwrseq-pcie-m2.c          |  26 ++++
 drivers/power/sequencing/pwrseq-qcom-wcn.c         |  30 ++++
 include/linux/pwrseq/consumer.h                    |   7 +
 include/linux/pwrseq/provider.h                    |   8 ++
 8 files changed, 277 insertions(+), 75 deletions(-)
---
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
change-id: 20260520-monza-wireless-e6ce7f013f38

Best regards,
-- 
Loic Poulain <loic.poulain@xxxxxxxxxxxxxxxx>