[PATCH AUTOSEL 5.18 26/49] arm64: dts: qcom: sc7280-qcard: Configure CTS pin to bias-bus-hold for bluetooth
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STALE1590d
REVIEWED: 4 (4M)
From: Sasha Levin <sashal@kernel.org>
Date: 2022-06-01 13:54:47
Also in:
linux-arm-msm, lkml, stable
Subsystem:
arm/qualcomm chromebook support, arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Linus Torvalds
1 review trailer.
From: Vijaya Krishna Nivarthi <redacted> [ 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 <redacted> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Bjorn Andersson <redacted> Link: https://lore.kernel.org/r/1650556567-4995-3-git-send-email-quic_vnivarth@quicinc.com (local) 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 @@ &qup_i2c13_data_clk { /* 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 @@ qup_uart7_sleep_cts: qup-uart7-sleep-cts { 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 */
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2.35.1