linux-kernel - Re: [PATCH 06/14] arm64: dts: qcom: qrb4210-rb2: Fix UART3 wakeup IRQ storm

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Message-ID: <17211f57-0c25-4108-bdc9-50d0f96d3185@oss.qualcomm.com>
Date: Wed, 31 Dec 2025 13:07:26 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Jeff Johnson <jjohnson@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Balakrishna Godavarthi <quic_bgodavar@...cinc.com>,
        Matthias Kaehlcke <mka@...omium.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-wireless@...r.kernel.org, ath10k@...ts.infradead.org,
        linux-pm@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>
Subject: Re: [PATCH 06/14] arm64: dts: qcom: qrb4210-rb2: Fix UART3 wakeup IRQ
 storm

On 12/31/25 12:35 AM, Dmitry Baryshkov wrote:
> Follow commit 9c92d36b0b1e ("arm64: dts: qcom: qrb2210-rb1: Fix UART3
> wakeup IRQ storm") and apply the similar fix to the RB2 platform.
> 
> Having RX / TX pins as pull up and wakup interrupt as high-level
> triggered generates an interrupt storm when trying to suspend the
> device. Avoid the storm by using the falling edge trigger (as all other
> platforms do).
> 
> Fixes: cab60b166575 ("arm64: dts: qcom: qrb4210-rb2: Enable bluetooth")
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad