From: Vijaya Krishna Nivarthi quic_vnivarth@quicinc.com
[ Upstream commit 497b272759986af1aa5a25b5e903d082c67bd8f6 ]
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/1650556567-4995-2-git-send-email-quic_vnivarth@qui... Signed-off-by: Sasha Levin sashal@kernel.org --- 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 ecbf2b89d896..5ab3696af354 100644 --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi @@ -400,10 +400,13 @@
&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 { @@ -495,10 +498,13 @@ 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 {