lkml.org 
[lkml]   [2022]   [Jun]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5.17 204/772] arm64: dts: qcom: sc7280-idp: Configure CTS pin to bias-bus-hold for bluetooth
    Date
    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@quicinc.com
    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 d623d71d8bd4..dd6dac0e1784 100644
    --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
    +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
    @@ -462,10 +462,13 @@

    &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 {
    @@ -516,10 +519,13 @@
    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 {
    --
    2.35.1


    \
     
     \ /
      Last update: 2022-06-07 22:50    [W:3.038 / U:0.032 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site