Signed-off-by: satya priya <redacted>
---
Changes in V2:
  - This patch adds sleep state for BT UART. Newly added in V2.

  arch/arm64/boot/dts/qcom/sc7180-idp.dts | 42 ++++++++++++++++++++++++++++-----
  1 file changed, 36 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7180-idp.dts b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
index 26cc491..bc919f2 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
+++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts

@@ -469,20 +469,50 @@
  
  &qup_uart3_default {
  	pinconf-cts {
-		/*
-		 * Configure a pull-down on 38 (CTS) to match the pull of
-		 * the Bluetooth module.
-		 */
+		/* Configure no pull on 38 (CTS) to match Bluetooth module */
  		pins = "gpio38";
+		bias-disable;
+	};
+
+	pinconf-rts {
+		/* We'll drive 39 (RTS), so configure pull-down */
+		pins = "gpio39";
+		drive-strength = <2>;
  		bias-pull-down;
+	};
+
+	pinconf-tx {
+		/* We'll drive 40 (TX), so no pull */
+		pins = "gpio40";
+		drive-strength = <2>;
+		bias-disable;
  		output-high;
  	};
  
+	pinconf-rx {
+		/*
+		 * Configure a pull-up on 41 (RX). This is needed to avoid
+		 * garbage data when the TX pin of the Bluetooth module is
+		 * in tri-state (module powered off or not driving the
+		 * signal yet).
+		 */
+		pins = "gpio41";
+		bias-pull-up;
+	};
+};
+
+&qup_uart3_sleep {
+	pinconf-cts {
+		/* Configure no-pull on 38 (CTS) to match Bluetooth module */
+		pins = "gpio38";
+		bias-disable;
+	};
+
  	pinconf-rts {
-		/* We'll drive 39 (RTS), so no pull */
+		/* We'll drive 39 (RTS), so configure pull-down */
  		pins = "gpio39";
  		drive-strength = <2>;
-		bias-disable;
+		bias-pull-down;
  	};
  
  	pinconf-tx {