diff options
| author | Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> | 2022-04-21 21:26:07 +0530 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2022-05-03 14:06:45 -0500 |
| commit | 3d0e375bae55c2dfa6dd0762f45ad71f0b192f71 (patch) | |
| tree | 0455d61c9a374f557f3029299e4a6f78cf87665f /arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi | |
| parent | 497b272759986af1aa5a25b5e903d082c67bd8f6 (diff) | |
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: 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@quicinc.com
Diffstat (limited to 'arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi')
| -rw-r--r-- | arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi | 19 |
1 files 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 */ |