linux-kernel - Re: [PATCH 3/5] arm64: dts: exynos5433: Add PPMU dt node

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Message-ID: <20161206190756.GA12683@kozik-lap>
Date:   Tue, 6 Dec 2016 21:07:56 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Chanwoo Choi <cw00.choi@...sung.com>
Cc:     krzk@...nel.org, javier@....samsung.com, kgene@...nel.org,
        robh+dt@...nel.org, s.nawrocki@...sung.com, tomasz.figa@...il.com,
        myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
        devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] arm64: dts: exynos5433: Add PPMU dt node

On Fri, Dec 02, 2016 at 04:18:05PM +0900, Chanwoo Choi wrote:
> This patch adds PPMU (Platform Performance Monitoring Unit) Device-tree node
> to measure the utilization of each IP in Exynos SoC.
> 
> - PPMU_D{0|1}_CPU are used to measure the utilization of MIF (Memory Interface)
>   block with VDD_MIF power source.
> - PPMU_D{0|1}_GENERAL are used to measure the utilization of INT(Internal)
>   block with VDD_INT power source.
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> ---
>  arch/arm64/boot/dts/exynos/exynos5433.dtsi | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
> index 64226d5ae471..8c4ee84d5232 100644
> --- a/arch/arm64/boot/dts/exynos/exynos5433.dtsi
> +++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
> @@ -599,6 +599,30 @@
>  			clock-names = "fin_pll", "mct";
>  		};
>  
> +		ppmu_d0_cpu: ppmu@...80000 {
> +			compatible = "samsung,exynos-ppmu-v2";
> +			reg = <0x10480000 0x2000>;
> +			status = "disabled";

Why these are disabled? They have some external dependencies?

Best regards,
Krzysztof

> +		};
> +
> +		ppmu_d0_general: ppmu@...90000 {
> +			compatible = "samsung,exynos-ppmu-v2";
> +			reg = <0x10490000 0x2000>;
> +			status = "disabled";
> +		};
> +
> +		ppmu_d1_cpu: ppmu@...b0000 {
> +			compatible = "samsung,exynos-ppmu-v2";
> +			reg = <0x104b0000 0x2000>;
> +			status = "disabled";
> +		};
> +
> +		ppmu_d1_general: ppmu@...c0000 {
> +			compatible = "samsung,exynos-ppmu-v2";
> +			reg = <0x104c0000 0x2000>;
> +			status = "disabled";
> +		};
> +
>  		pinctrl_alive: pinctrl@...80000 {
>  			compatible = "samsung,exynos5433-pinctrl";
>  			reg = <0x10580000 0x1a20>, <0x11090000 0x100>;
> -- 
> 1.9.1
>