From 497b272759986af1aa5a25b5e903d082c67bd8f6 Mon Sep 17 00:00:00 2001 From: Vijaya Krishna Nivarthi Date: Thu, 21 Apr 2022 21:26:06 +0530 Subject: [PATCH] arm64: dts: qcom: sc7280-idp: 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: Vijaya Krishna Nivarthi Reviewed-by: Douglas Anderson Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/1650556567-4995-2-git-send-email-quic_vnivarth@quicinc.com --- arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi index 6a14259b93c43..5eb668991e249 100644 --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi @@ -408,10 +408,13 @@ &qup_uart7_cts { /* - * 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; }; &qup_uart7_rts { @@ -503,10 +506,13 @@ 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; }; qup_uart7_sleep_rts: qup-uart7-sleep-rts { -- 2.30.2