Re: [PATCH v3] Bluetooth: hci_qca: disable power control for WCN7850 when bt_en is not defined

[Neil Armstrong <neil.armstrong@linaro.org>]

On 3/24/26 03:30, Shuai Zhang wrote:
> On platforms using an M.2 slot with both UART and USB support, bt_en is
> pulled high by hardware. In this case, software-based power control
> should be disabled. The current platforms are Lemans-EVK and Monaco-EVK.
> 
> Add QCA_WCN7850 to the existing condition so that power_ctrl_enabled is
> cleared when bt_en is not software-controlled (or absent), aligning its
> behavior with WCN6750 and WCN6855
> 
> Signed-off-by: Shuai Zhang <shuai.zhang@oss.qualcomm.com>
> ---
> Changes for v3
> - Add change history.
> - Link to v2: https://lore.kernel.org/all/20260319075125.76539-1-shuai.zhang@oss.qualcomm.com/
> 
> Changes for v2
> - Expand the commit description to include the affected platforms.
> - Link to v1: https://lore.kernel.org/all/20260319031040.4096297-1-shuai.zhang@oss.qualcomm.com/
> ---
>   drivers/bluetooth/hci_qca.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index c17a462aef55..4512ff7cd0c0 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -2484,7 +2484,8 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>   
>   		if (!qcadev->bt_en &&
>   		    (data->soc_type == QCA_WCN6750 ||
> -		     data->soc_type == QCA_WCN6855))
> +		     data->soc_type == QCA_WCN6855 ||
> +		     data->soc_type == QCA_WCN7850))
>   			power_ctrl_enabled = false;

This disables power_ctrl for WCN7850 soldered down on the main board and handled by pwrseq, which is a regression.

When pwrseq handles the QCA_WCN7850 qcadev->bt_en is obviously NULL, but qcadev->bt_power->pwrseq is not.

The test should be `if (!qcadev->bt_en && !qcadev->bt_power && !qcadev->bt_power->pwrseq`

Neil

>   
>   		qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",