From: Vijaya Krishna Nivarthi quic_vnivarth@quicinc.com
[ Upstream commit 3d0e375bae55c2dfa6dd0762f45ad71f0b192f71 ]
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 quic_vnivarth@quicinc.com Reviewed-by: Douglas Anderson dianders@chromium.org Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Link: https://lore.kernel.org/r/1650556567-4995-3-git-send-email-quic_vnivarth@qui... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi b/arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi index b833ba1e8f4a..98b5cd70bca5 100644 --- a/arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi @@ -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 */