linux-kernel - Re: [Patch v3 4/6] arm64: boot: dts: qcom: sdm45: Add support for LMh node

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Date:   Fri, 9 Jul 2021 23:17:24 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Thara Gopinath <thara.gopinath@...aro.org>
Cc:     agross@...nel.org, rui.zhang@...el.com, daniel.lezcano@...aro.org,
        viresh.kumar@...aro.org, rjw@...ysocki.net, robh+dt@...nel.org,
        tdas@...eaurora.org, mka@...omium.org,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [Patch v3 4/6] arm64: boot: dts: qcom: sdm45: Add support for
 LMh node

On Thu 08 Jul 07:06 CDT 2021, Thara Gopinath wrote:

> Add LMh nodes for cpu cluster0 and cpu cluster1. Also add interrupt
> support in cpufreq node to capture the LMh interrupt and let the scheduler
> know of the max frequency throttling.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn

> Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
> ---
> 
> v2->v3:
> 	- Changed the LMh low and high trip to 94500 and 95000 mC from
> 	  74500 and 75000 mC. This was a bug that got introduced in v2.
> v1->v2:
> 	- Dropped dt property qcom,support-lmh as per Bjorn's review comments.
> 	- Changed lmh compatible from generic to platform specific.
> 	- Introduced properties specifying arm, low and high temp thresholds for LMh
> 	  as per Daniel's suggestion.
> 
>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index 0a86fe71a66d..4da6b8f3dd7b 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -3646,6 +3646,30 @@ swm: swm@c85 {
>  			};
>  		};
>  
> +		lmh_cluster1: lmh@...70800 {
> +			compatible = "qcom,sdm845-lmh";
> +			reg = <0 0x17d70800 0 0x401>;
> +			interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
> +			qcom,lmh-cpu-id = <0x4>;
> +			qcom,lmh-temperature-arm = <65000>;
> +			qcom,lmh-temperature-low = <94500>;
> +			qcom,lmh-temperature-high = <95000>;
> +			interrupt-controller;
> +			#interrupt-cells = <1>;
> +		};
> +
> +		lmh_cluster0: lmh@...78800 {
> +			compatible = "qcom,sdm845-lmh";
> +			reg = <0 0x17d78800 0 0x401>;
> +			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
> +			qcom,lmh-cpu-id = <0x0>;
> +			qcom,lmh-temperature-arm = <65000>;
> +			qcom,lmh-temperature-low = <94500>;
> +			qcom,lmh-temperature-high = <95000>;
> +			interrupt-controller;
> +			#interrupt-cells = <1>;
> +		};
> +
>  		sound: sound {
>  		};
>  
> @@ -4911,6 +4935,8 @@ cpufreq_hw: cpufreq@...43000 {
>  			reg = <0 0x17d43000 0 0x1400>, <0 0x17d45800 0 0x1400>;
>  			reg-names = "freq-domain0", "freq-domain1";
>  
> +			interrupts-extended = <&lmh_cluster0 0>, <&lmh_cluster1 0>;
> +
>  			clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
>  			clock-names = "xo", "alternate";
>  
> -- 
> 2.25.1
>