linux-kernel - Re: [PATCH v2 2/3] arm64: dts: qcom: hamoa: enable ETR and CTCU devices

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Message-ID: <c739da90-de92-4d84-bb5a-e653a9fbdcef@oss.qualcomm.com>
Date: Tue, 3 Feb 2026 10:44:51 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Jie Gan <jie.gan@....qualcomm.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach
 <mike.leach@...aro.org>,
        James Clark <james.clark@...aro.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Tingwei Zhang <tingwei.zhang@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] arm64: dts: qcom: hamoa: enable ETR and CTCU
 devices

On 2/3/26 10:32 AM, Jie Gan wrote:
> Embedded Trace Router(ETR) is working as a DDR memory sink to collect
> tracing data from source device.
> 
> The CTCU serves as the control unit for the ETR device, managing its
> behavior to determine how trace data is collected.
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> Signed-off-by: Jie Gan <jie.gan@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/hamoa.dtsi | 160 +++++++++++++++++++++++++++++++++++-
>  1 file changed, 159 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/hamoa.dtsi b/arch/arm64/boot/dts/qcom/hamoa.dtsi
> index db65c392e618..88ec29446ba1 100644
> --- a/arch/arm64/boot/dts/qcom/hamoa.dtsi
> +++ b/arch/arm64/boot/dts/qcom/hamoa.dtsi
> @@ -6771,6 +6771,35 @@ data-pins {
>  			};
>  		};
>  
> +		ctcu@...01000 {
> +			compatible = "qcom,hamoa-ctcu", "qcom,sa8775p-ctcu";

Sorry for not pointing that out explicitly the previous time around,
but 'hamoa' also falls under the "had numerical compatibles" category
(you'll see the only hits for "qcom,hamoa" are "qcom,hamoa-iot-evk"
which is a board name)

Glymur and Kaanapali are, understandably, Glymur and Kaanapali
respectively

Konrad