[v2] Bluetooth: hci_qca: disable power control for WCN7850 when bt_en is not defined

[PATCH v2] Bluetooth: hci_qca: disable power control for WCN7850 when bt_en is not defined

Posted by Shuai Zhang 2 weeks, 4 days ago

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>
---
 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;
 
 		qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
-- 
2.34.1

Re: [PATCH v2] Bluetooth: hci_qca: disable power control for WCN7850 when bt_en is not defined

Posted by Bartosz Golaszewski 2 weeks, 4 days ago

On Thu, Mar 19, 2026 at 8:51 AM Shuai Zhang
<shuai.zhang@oss.qualcomm.com> 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>
> ---

What are the changes in v2?

Bartosz

Re: [PATCH v2] Bluetooth: hci_qca: disable power control for WCN7850 when bt_en is not defined

Posted by Shuai Zhang 2 weeks, 4 days ago

Hi  Bartosz

On 3/19/2026 5:35 PM, Bartosz Golaszewski wrote:
> On Thu, Mar 19, 2026 at 8:51 AM Shuai Zhang
> <shuai.zhang@oss.qualcomm.com> 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>
>> ---
> What are the changes in v2?


Sorry, I forgot to include the version update differences. v2 only 
updates the commit content
and adds explanations regarding hardware management.


>
> Bartosz


Thanks,

Shuai