linux-kernel - Re: [PATCH 2/2] arm64: dts: renesas: r8a774e1: Add cpuidle support for CA5x cores

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Date:   Thu, 3 Sep 2020 14:39:29 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Prabhakar <prabhakar.csengg@...il.com>
Subject: Re: [PATCH 2/2] arm64: dts: renesas: r8a774e1: Add cpuidle support
 for CA5x cores

Hi Prabhakar,

On Thu, Aug 27, 2020 at 4:53 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> Enable cpuidle (core shutdown) support for RZ/G2H CA5x cores.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

> --- a/arch/arm64/boot/dts/renesas/r8a774e1.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r8a774e1.dtsi
> @@ -127,6 +127,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA57_CPU0>;
>                         next-level-cache = <&L2_CA57>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_0>;
>                         dynamic-power-coefficient = <854>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
>                         operating-points-v2 = <&cluster0_opp>;
> @@ -141,6 +142,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA57_CPU1>;
>                         next-level-cache = <&L2_CA57>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_0>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
>                         operating-points-v2 = <&cluster0_opp>;
>                         capacity-dmips-mhz = <1024>;
> @@ -154,6 +156,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA57_CPU2>;
>                         next-level-cache = <&L2_CA57>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_0>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
>                         operating-points-v2 = <&cluster0_opp>;
>                         capacity-dmips-mhz = <1024>;
> @@ -167,6 +170,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA57_CPU3>;
>                         next-level-cache = <&L2_CA57>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_1>;

CPU_SLEEP_0

>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
>                         operating-points-v2 = <&cluster0_opp>;
>                         capacity-dmips-mhz = <1024>;
> @@ -180,6 +184,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA53_CPU0>;
>                         next-level-cache = <&L2_CA53>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_1>;
>                         #cooling-cells = <2>;
>                         dynamic-power-coefficient = <277>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
> @@ -194,6 +199,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA53_CPU1>;
>                         next-level-cache = <&L2_CA53>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_1>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
>                         operating-points-v2 = <&cluster1_opp>;
>                         capacity-dmips-mhz = <535>;
> @@ -206,6 +212,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA53_CPU2>;
>                         next-level-cache = <&L2_CA53>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_1>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
>                         operating-points-v2 = <&cluster1_opp>;
>                         capacity-dmips-mhz = <535>;
> @@ -218,6 +225,7 @@
>                         power-domains = <&sysc R8A774E1_PD_CA53_CPU3>;
>                         next-level-cache = <&L2_CA53>;
>                         enable-method = "psci";
> +                       cpu-idle-states = <&CPU_SLEEP_1>;
>                         clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
>                         operating-points-v2 = <&cluster1_opp>;
>                         capacity-dmips-mhz = <535>;

With the above fixed:
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

No need to resend, will fix while queueing in renesas-devel for v5.10.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds