Re: [PATCH 00/12] Fixes/improvements for the PCI M.2 power sequencing driver

Wei Deng
2026-04-24T06:25:36Z

Hi Mani,

Tested with WCN685x on both M.2 card (pwrseq-pcie-m2) and direct attach
(pwrseq-qcom-wcn). BT works correctly in both cases.

Tested-by: Wei Deng <wei.deng@oss.qualcomm.com>

On 4/22/2026 7:24 PM, Manivannan Sadhasivam via B4 Relay wrote:
> Hi,
>
> This series has several key improvements and fixes to the M.2 power sequencing
> driver and also the BT HCI_QCA driver. Notably, this series allows the M.2 power
> sequencing driver to work with more M.2 cards, not just WCN7850. It also allows
> the BT HCI_QCA driver to detect whether it can control BT_EN (or W_DISABLE2#)
> signal on the connector and set the HCI_QUIRK_NON_PERSISTENT_SETUP quirk.
>
> Testing
> =======
>
> This series was tested on Lenovo Thinkpad T14s together with the below DTS
> patches:
> https://github.com/Mani-Sadhasivam/linux/commit/29534d15307551b2355eb254601dec511169f0aa
> https://github.com/Mani-Sadhasivam/linux/commit/f4eaacfe647674be200847092b43cdef2194fc55
>
> Merge Strategy
> ==============
>
> Since the BT HCI_QCA changes depend on the pwrseq changes, it would be good to
> merge the whole series through pwrseq tree or through an immutable branch.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
> ---
> Manivannan Sadhasivam (12):
> power: sequencing: Introduce an API to check whether the pwrseq is fixed or controllable
> power: sequencing: pcie-m2: Add support for 'is_fixed()' callback to 'uart' target
> power: sequencing: qcom-wcn: Add support for 'is_fixed()' callback to 'bluetooth' target
> power: sequencing: pcie-m2: Fix inconsistent function prefixes
> power: sequencing: pcie-m2: Allow creating serdev for multiple PCI devices
> power: sequencing: pcie-m2: Improve PCI device ID check
> power: sequencing: pcie-m2: Create serdev for PCI devices present before probe
> power: sequencing: pcie-m2: Create BT node based on the pci_device_id[] table
> Bluetooth: hci_qca: Add M.2 Bluetooth device support using pwrseq
> Bluetooth: hci_qca: Rename 'power_ctrl_enabled' to 'bt_en_available'
> Bluetooth: hci_qca: Check whether the M.2 UART interface is fixed or not
> Bluetooth: hci_qca: Fix the broken BT_EN GPIO detection for Qcom WCN devices
>
> drivers/bluetooth/hci_qca.c | 40 +++--
> drivers/power/sequencing/core.c | 33 ++++
> drivers/power/sequencing/pwrseq-pcie-m2.c | 242 ++++++++++++++++++++++-------
> drivers/power/sequencing/pwrseq-qcom-wcn.c | 9 ++
> include/linux/pwrseq/consumer.h | 6 +
> include/linux/pwrseq/provider.h | 2 +
> 6 files changed, 262 insertions(+), 70 deletions(-)
> ---
> base-commit: 6596a02b207886e9e00bb0161c7fd59fea53c081
> change-id: 20260422-pwrseq-m2-bt-abdaa71094eb
>
> Best regards,
> --
> Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
>
>

--
Best Regards,
Wei Deng