Re: [PATCH 1/5] Bluetooth: hci_qca: Add auxiliary driver for PCIe M.2 modules

[Bartosz Golaszewski]

On Tue, 15 Sep 2026 16:24:02 +0200, Manivannan Sadhasivam via B4 Relay
<devnull+manivannan.sadhasivam.oss.qualcomm.com@xxxxxxxxxx> said:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
>
> The QCA2066, WCN6855 and WCN7850 combo modules expose Bluetooth over
> UART. Since these modules are attached over PCIe, these are not described
> in firmware like devicetree. So these modules are discovered at runtime
> over PCIe by the power sequencing driver, which allocates the UART serdev
> and creates an auxiliary device carrying that transport and the power
> sequencing target to power up the Bluetooth function.
>
> Add an auxiliary driver that binds to this device. It reuses the serdev
> provided by the producer, brings up the controller through the existing
> UART transport with hci_uart_register_device() and drives power through
> the sequencer obtained with devm_pwrseq_get().
>
> Add a shared header describing the auxiliary device so that the power
> sequencing driver and hci_qca agree on its layout.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>