[PATCH v2] Bluetooth: hci_qca: Reopen port after power on for QCA2066

[Shuai Zhang]

QCA2066 needs the serial port reopened after the controller is powered
on, otherwise the host and the device run into RTS/CTS synchronization
issues.

Signed-off-by: Shuai Zhang <shuai.zhang@xxxxxxxxxxxxxxxx>
---
Changes for V2
 - Use a separate case for clearer logic.
 - V1 link
   https://lore.kernel.org/all/20261015092224.262158-1-shuai.zhang@xxxxxxxxxxxxxxxx/
---
 drivers/bluetooth/hci_qca.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 7089e9b63..ee3ccb59e 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1867,6 +1867,19 @@ static int qca_power_on(struct hci_dev *hdev)
 		ret = qca_regulator_init(hu);
 		break;
 
+	case QCA_QCA2066:
+		qcadev = serdev_device_get_drvdata(hu->serdev);
+		if (qcadev->bt_en) {
+			gpiod_set_value_cansleep(qcadev->bt_en, 0);
+			msleep(50);
+			gpiod_set_value_cansleep(qcadev->bt_en, 1);
+			/* Controller needs time to bootup. */
+			msleep(50);
+		}
+
+		ret = qca_port_reopen(hu);
+		break;
+
 	default:
 		qcadev = serdev_device_get_drvdata(hu->serdev);
 		if (qcadev->bt_en) {
-- 
2.34.1