linux-kernel - Re: [PATCH V6 3/4] arm64: dts: qcom: sc7180-trogdor: Add wakeup support for BT UART

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Message-ID: <20200914160026.GB2022397@google.com>
Date:   Mon, 14 Sep 2020 09:00:26 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     satya priya <skakit@...eaurora.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        gregkh@...uxfoundation.org, Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, akashast@...eaurora.org,
        rojay@...eaurora.org, msavaliy@....qualcomm.com,
        dianders@...omium.org
Subject: Re: [PATCH V6 3/4] arm64: dts: qcom: sc7180-trogdor: Add wakeup
 support for BT UART

On Mon, Sep 14, 2020 at 07:28:36PM +0530, satya priya wrote:
> Add the necessary pinctrl, interrupt property and a suitable sleep config
> to support Bluetooth wakeup feature.
> 
> GPIO mode is configured in sleep state to drive the RTS/RFR line low.
> If QUP function is selected in sleep state, UART RTS/RFR is pulled high
> during suspend and BT SoC not able to send wakeup bytes.
> 
> Signed-off-by: satya priya <skakit@...eaurora.org>

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
Tested-by: Matthias Kaehlcke <mka@...omium.org>