linux-kernel - Re: [V6 0/2] arm64: dts: qcom: Configure CTS pin to bias-bus-hold for bluetooth

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Date:   Tue, 3 May 2022 08:29:23 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        quic_msavaliy@...cinc.com
Subject: Re: [V6 0/2] arm64: dts: qcom: Configure CTS pin to bias-bus-hold for bluetooth

Bjorn,

On Thu, Apr 21, 2022 at 8:56 AM Vijaya Krishna Nivarthi
<quic_vnivarth@...cinc.com> wrote:
>
> WLAN rail was leaking power during RBSC/sleep even after turning BT off.
> Change pinctrl configuration to handle same.
>
> Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>
> ---
> v6: add code comments about how bias-bus-hold could save power
> v5: modify subject to include bluetooth
> v4: modify subject of each patch to indicate what it is applying to
> v3: apply same change to active state and other sc7280*.dts* as well
> v2: used bias-bus-hold as per review comments
> v1: intial patch used bias-disable for sleep pinctrl in sc7280-idp only
> ---
>
> Vijaya Krishna Nivarthi (2):
>   arm64: dts: qcom: sc7280-idp: Configure CTS pin to bias-bus-hold for
>     bluetooth
>   arm64: dts: qcom: sc7280-qcard: Configure CTS pin to bias-bus-hold for
>     bluetooth
>
>  arch/arm64/boot/dts/qcom/sc7280-idp.dtsi   | 18 ++++++++++++------
>  arch/arm64/boot/dts/qcom/sc7280-qcard.dtsi | 19 ++++++++++++++-----
>  2 files changed, 26 insertions(+), 11 deletions(-)

If the tree hasn't closed yet, I think these two patches are waiting
to land and ready to go.

Thanks!

-Doug