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charset="utf-8" When Bluetooth supports both USB and UART, the BT UART driver is always loaded, while USB is hot-pluggable. As a result, when Bluetooth is used over USB, the UART driver still be probed and drive BT_EN low, which causes the Bluetooth device on USB to be disconnected. Configure BT_EN as a GPIO hog so that it is controlled by the platform instead of the UART driver, preventing BT over USB from being unintentionally powered down. Signed-off-by: Shuai Zhang --- arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts b/arch/arm64/boot/d= ts/qcom/hamoa-iot-evk.dts index 630642baa435..60a0b3ecbc1b 100644 --- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts +++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts @@ -647,10 +647,9 @@ wcn7850-pmu { vddrfa1p2-supply =3D <&vreg_wcn_1p9>; vddrfa1p8-supply =3D <&vreg_wcn_1p9>; =20 - bt-enable-gpios =3D <&tlmm 116 GPIO_ACTIVE_HIGH>; wlan-enable-gpios =3D <&tlmm 117 GPIO_ACTIVE_HIGH>; =20 - pinctrl-0 =3D <&wcn_bt_en>, <&wcn_wlan_en>; + pinctrl-0 =3D <&wcn_wlan_en>; pinctrl-names =3D "default"; =20 regulators { @@ -1398,11 +1397,12 @@ wcd_default: wcd-reset-n-active-state { output-low; }; =20 - wcn_bt_en: wcn-bt-en-state { - pins =3D "gpio116"; - function =3D "gpio"; - drive-strength =3D <2>; - bias-disable; + wcn_bt_en_hog: wcn-bt-en-state-hog { + gpio-hog; + gpios =3D <116 GPIO_ACTIVE_HIGH>; + output-high; + input-disable; + link-name =3D "BT_EN"; }; =20 wcn_wlan_en: wcn-wlan-en-state { --=20 2.34.1