linux-kernel - Re: [RFC PATCH v5 4/6] ARM: dts: exynos: Add interconnect properties to Exynos4412 bus nodes

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Date:   Sun, 31 May 2020 09:02:13 +0900
From:   Chanwoo Choi <chanwoo@...nel.org>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     Georgi Djakov <georgi.djakov@...aro.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Artur Świgoń <a.swigon@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>, inki.dae@...sung.com,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH v5 4/6] ARM: dts: exynos: Add interconnect properties
 to Exynos4412 bus nodes

Hi Sylwester,

On Sat, May 30, 2020 at 1:33 AM Sylwester Nawrocki
<s.nawrocki@...sung.com> wrote:
>
> This patch adds the following properties for Exynos4412 interconnect
> bus nodes:
>  - samsung,interconnect-parent: to declare connections between
>    nodes in order to guarantee PM QoS requirements between nodes;
>  - #interconnect-cells: required by the interconnect framework.
>
> Note that #interconnect-cells is always zero and node IDs are not
> hardcoded anywhere.
>
> Signed-off-by: Artur Świgoń <a.swigon@...sung.com>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
> ---
> Changes for v5:
>  - adjust to renamed exynos,interconnect-parent-node property,
>  - add properties in common exynos4412.dtsi file rather than
>    in Odroid specific odroid4412-odroid-common.dtsi.
> ---
>  arch/arm/boot/dts/exynos4412.dtsi | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos4412.dtsi b/arch/arm/boot/dts/exynos4412.dtsi
> index 4886894..a7496d3 100644
> --- a/arch/arm/boot/dts/exynos4412.dtsi
> +++ b/arch/arm/boot/dts/exynos4412.dtsi
> @@ -381,6 +381,7 @@
>                         clocks = <&clock CLK_DIV_DMC>;
>                         clock-names = "bus";
>                         operating-points-v2 = <&bus_dmc_opp_table>;
> +                       #interconnect-cells = <0>;
>                         status = "disabled";
>                 };
>
> @@ -450,6 +451,8 @@
>                         clocks = <&clock CLK_DIV_GDL>;
>                         clock-names = "bus";
>                         operating-points-v2 = <&bus_leftbus_opp_table>;
> +                       samsung,interconnect-parent = <&bus_dmc>;
> +                       #interconnect-cells = <0>;
>                         status = "disabled";
>                 };
>
> @@ -466,6 +469,8 @@
>                         clocks = <&clock CLK_ACLK160>;
>                         clock-names = "bus";
>                         operating-points-v2 = <&bus_display_opp_table>;
> +                       samsung,interconnect-parent = <&bus_leftbus>;
> +                       #interconnect-cells = <0>;
>                         status = "disabled";
>                 };
>
> --
> 2.7.4
>

Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics