linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sc7180: Add Coresight support

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Message-ID: <158482865109.125146.10520179077419628836@swboyd.mtv.corp.google.com>
Date:   Sat, 21 Mar 2020 15:10:51 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        devicetree@...r.kernel.org
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sc7180: Add Coresight support

Quoting Sai Prakash Ranjan (2020-03-20 00:44:29)
> Add coresight components found on Qualcomm SC7180 SoC.
> 
> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Tested-by: Stephen Boyd <swboyd@...omium.org>

One nit below.

>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 507 +++++++++++++++++++++++++++
>  1 file changed, 507 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 998f101ad623..d8fe960d6ace 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -1294,6 +1294,513 @@
>                         };
>                 };
>  
> +               stm@...2000 {
> +                       compatible = "arm,coresight-stm", "arm,primecell";
> +                       reg = <0 0x06002000 0 0x1000>,
> +                             <0 0x16280000 0 0x180000>;
> +                       reg-names = "stm-base", "stm-stimulus-base";
> +
> +                       clocks = <&aoss_qmp>;
> +                       clock-names = "apb_pclk";
> +
> +                       out-ports {
> +                               port {
> +                                       stm_out: endpoint {
> +                                               remote-endpoint =
> +                                                 <&funnel0_in7>;

Given that this is DT I'd say we just put this remote-endpoint all on
one line. Makes it more readable and I don't think we really care about
the line length in these cases. We're nested pretty deep because it's a
graph binding.

> +                                       };
> +                               };
> +                       };
> +               };
> +