[PATCH v1] arm64: dts: qcom: hamoa-iot-evk: support Bluetooth over both USB and UART

[Shuai Zhang]

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 <shuai.zhang@xxxxxxxxxxxxxxxx>
---
 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/dts/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 = <&vreg_wcn_1p9>;
 		vddrfa1p8-supply = <&vreg_wcn_1p9>;
 
-		bt-enable-gpios = <&tlmm 116 GPIO_ACTIVE_HIGH>;
 		wlan-enable-gpios = <&tlmm 117 GPIO_ACTIVE_HIGH>;
 
-		pinctrl-0 = <&wcn_bt_en>, <&wcn_wlan_en>;
+		pinctrl-0 = <&wcn_wlan_en>;
 		pinctrl-names = "default";
 
 		regulators {
@@ -1398,11 +1397,12 @@ wcd_default: wcd-reset-n-active-state {
 		output-low;
 	};
 
-	wcn_bt_en: wcn-bt-en-state {
-		pins = "gpio116";
-		function = "gpio";
-		drive-strength = <2>;
-		bias-disable;
+	wcn_bt_en_hog: wcn-bt-en-state-hog {
+		gpio-hog;
+		gpios = <116 GPIO_ACTIVE_HIGH>;
+		output-high;
+		input-disable;
+		link-name = "BT_EN";
 	};
 
 	wcn_wlan_en: wcn-wlan-en-state {
-- 
2.34.1