diff options
| author | Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> | 2022-04-21 21:26:06 +0530 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2022-05-03 14:06:45 -0500 |
| commit | 497b272759986af1aa5a25b5e903d082c67bd8f6 (patch) | |
| tree | 01c96883369169d4ad1cd120edaa559eb12e0627 /arch | |
| parent | 067bc653b85e466048914c48e46659a50a907fa6 (diff) | |
| download | linux-497b272759986af1aa5a25b5e903d082c67bd8f6.tar.bz2 | |
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 <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@quicinc.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 18 |
1 files 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 6a14259b93c4..5eb668991e24 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 { |