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arm64: dts: qcom: sc7280-idp: Configure CTS pin to bias-bus-hold for bluetooth

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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
This commit is contained in:
Vijaya Krishna Nivarthi 2022-04-21 21:26:06 +05:30 committed by Bjorn Andersson
parent 067bc653b8
commit 497b272759
1 changed files with 12 additions and 6 deletions
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18
arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
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@ -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 {