Commit 3d0e375b authored by Vijaya Krishna Nivarthi's avatar Vijaya Krishna Nivarthi Committed by Bjorn Andersson
Browse files

arm64: dts: qcom: sc7280-qcard: Configure CTS pin to bias-bus-hold for bluetooth 



WLAN rail was leaking power during RBSC/sleep even after turning BT off.
Change active and sleep pinctrl configurations to handle same.

Signed-off-by: default avatarVijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1650556567-4995-3-git-send-email-quic_vnivarth@quicinc.com
parent 497b2727

arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi

+14 −5
Original line number Diff line number Diff line
@@ -398,8 +398,14 @@ mos_bt_uart: &uart7 { 


/* For mos_bt_uart */

&qup_uart7_cts {

	/* Configure a pull-down on CTS to match the pull of the Bluetooth module. */

	bias-pull-down;

	/*

	 * Configure a bias-bus-hold on CTS to lower power

	 * usage when Bluetooth is turned off. Bus hold will

	 * maintain a low power state regardless of whether

	 * the Bluetooth module drives the pin in either

	 * direction or leaves the pin fully unpowered.

	 */

	bias-bus-hold;

};



/* For mos_bt_uart */
@@ -490,10 +496,13 @@ mos_bt_uart: &uart7 { 
		pins = "gpio28";

		function = "gpio";

		/*

		 * Configure a pull-down on CTS to match the pull of

		 * the Bluetooth module.

		 * Configure a bias-bus-hold on CTS to lower power

		 * usage when Bluetooth is turned off. Bus hold will

		 * maintain a low power state regardless of whether

		 * the Bluetooth module drives the pin in either

		 * direction or leaves the pin fully unpowered.

		 */

		bias-pull-down;

		bias-bus-hold;

	};



	/* For mos_bt_uart */