linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sm8750: Add BWMONs

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Message-ID: <Z4k8T31cw_CxHFLC@linaro.org>
Date: Thu, 16 Jan 2025 18:05:19 +0100
From: Stephan Gerhold <stephan.gerhold@...aro.org>
To: Melody Olvera <quic_molvera@...cinc.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Georgi Djakov <djakov@...nel.org>, Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
	Trilok Soni <quic_tsoni@...cinc.com>, linux-arm-msm@...r.kernel.org,
	linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Shivnandan Kumar <quic_kshivnan@...cinc.com>
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sm8750: Add BWMONs

On Mon, Jan 13, 2025 at 01:08:18PM -0800, Melody Olvera wrote:
> From: Shivnandan Kumar <quic_kshivnan@...cinc.com>
> 
> Add the CPU BWMONs for SM8750 SoCs.
> 
> Signed-off-by: Shivnandan Kumar <quic_kshivnan@...cinc.com>
> Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/sm8750.dtsi | 74 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 74 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> index 3bbd7d18598ee0a3a0d5130c03a3166e1fc14d82..09fe3149da1926b74a98280fe209ae7f423db864 100644
> --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> @@ -2802,6 +2802,80 @@ rpmhpd_opp_super_turbo_no_cpr: opp-480 {
>  			};
>  		};
>  
> +		/* cluster0 */
> +		pmu@...b3400 {
> +			compatible = "qcom,sm8750-cpu-bwmon", "qcom,sdm845-bwmon";
> +			reg = <0x0 0x240b3400 0x0 0x600>;
> +
> +			interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
> +					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>;

The start of the interconnect path is QCOM_ICC_TAG_ACTIVE_ONLY, but the
destination is QCOM_ICC_TAG_ALWAYS? This is strange. Interconnect used
by the CPU should be QCOM_ICC_TAG_ACTIVE_ONLY.

Stephan