linux-kernel - Re: [PATCH v6 09/10] arm64: dts: mediatek: Add MediaTek CCI node for MT8183

Open Source and information security mailing list archives

Message-ID: <e1dffbf98c034b99b1d7fd10aa009a645812abdc.camel@mediatek.com>
Date:   Mon, 16 May 2022 18:41:31 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     Chen-Yu Tsai <wenst@...omium.org>
CC:     <rafael@...nel.org>, <viresh.kumar@...aro.org>,
        <robh+dt@...nel.org>, <krzk+dt@...nel.org>,
        <matthias.bgg@...il.com>, <jia-wei.chang@...iatek.com>,
        <roger.lu@...iatek.com>, <hsinyi@...gle.com>,
        <khilman@...libre.com>, <angelogioacchino.delregno@...labora.com>,
        <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "Andrew-sh . Cheng" <andrew-sh.cheng@...iatek.com>
Subject: Re: [PATCH v6 09/10] arm64: dts: mediatek: Add MediaTek CCI node
 for MT8183

On Mon, 2022-05-16 at 13:35 +0800, Chen-Yu Tsai wrote:
> On Thu, May 5, 2022 at 8:04 PM Rex-BC Chen <rex-bc.chen@...iatek.com>
> wrote:
> > 
> > Add MediaTek CCI devfreq node for MT8183.
> > 
> > Signed-off-by: Andrew-sh.Cheng <andrew-sh.cheng@...iatek.com>
> > Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > ---
> >  arch/arm64/boot/dts/mediatek/mt8183-evb.dts    | 4 ++++
> >  arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 4 ++++
> >  arch/arm64/boot/dts/mediatek/mt8183.dtsi       | 7 +++++++
> >  3 files changed, 15 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> > b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> > index 8953dbf84f3e..7ac9864db9de 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> > +++ b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> > @@ -412,6 +412,10 @@
> > 
> >  };
> > 
> > +&cci {
> > +       proc-supply = <&mt6358_vproc12_reg>;
> > +};
> > +
> >  &cpu0 {
> >         proc-supply = <&mt6358_vproc12_reg>;
> >  };
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> > index 8d5bf73a9099..b035e06840e6 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> > @@ -230,6 +230,10 @@
> >         status = "okay";
> >  };
> > 
> > +&cci {
> > +       proc-supply = <&mt6358_vproc12_reg>;
> > +};
> > +
> >  &cpu0 {
> >         proc-supply = <&mt6358_vproc12_reg>;
> >  };
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > index cecf96b628b7..11caf3dd85cd 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > @@ -280,6 +280,13 @@
> >                 };
> >         };
> > 
> > +       cci: cci {
> > +               compatible = "mediatek,mt8183-cci";
> > +               clocks = <&apmixedsys CLK_APMIXED_CCIPLL>;
> > +               clock-names = "cci_clock";
> 
> Binding says there should be two clocks: the actual clock that drives
> CCI, and a stable "intermediate" clock to switch to during clock rate
> changes. So I think this should look like:
> 
>     clocks = <&mcucfg CLK_MCU_BUS_SEL>,
>              <&topckgen CLK_TOP_ARMPLL_DIV_PLL1>;
>     clock-names = "cci", "intermediate";
> 
> 
> ChenYu
> 

Hello Chen-Yu,

Thanks for your reminder.
I will update this and sned next version.

BRs,
Rex

> > +               operating-points-v2 = <&cci_opp>;
> > +       };
> > +
> >         cpus {
> >                 #address-cells = <1>;
> >                 #size-cells = <0>;
> > --
> > 2.18.0
> > 
> > 
> > _______________________________________________
> > Linux-mediatek mailing list
> > Linux-mediatek@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-mediatek

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives