linux-kernel - Re: [PATCH V3 13/15] arm64: dts: mediatek: Add opp table and clock property for MT8183 cpufreq

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Message-ID: <a1ae5616-48b8-054b-aad3-a9569eed20e1@collabora.com>
Date:   Fri, 15 Apr 2022 14:24:01 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Rex-BC Chen <rex-bc.chen@...iatek.com>, rafael@...nel.org,
        viresh.kumar@...aro.org, robh+dt@...nel.org, krzk+dt@...nel.org,
        matthias.bgg@...il.com
Cc:     jia-wei.chang@...iatek.com, roger.lu@...iatek.com,
        hsinyi@...gle.com, khilman@...libre.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 V3 13/15] arm64: dts: mediatek: Add opp table and clock
 property for MT8183 cpufreq

Il 15/04/22 07:59, Rex-BC Chen ha scritto:
> - Add cpufreq opp table.
> - Add MediaTek cci opp table.
> - Add property of opp table and clock fro cpufreq.
> 
> Signed-off-by: Andrew-sh.Cheng <andrew-sh.cheng@...iatek.com>
> Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8183-evb.dts |  32 +++
>   arch/arm64/boot/dts/mediatek/mt8183.dtsi    | 270 ++++++++++++++++++++
>   2 files changed, 302 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> index f3fd3cca23e9..8953dbf84f3e 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts

..snip..

> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index 4b08691ed39e..4ae3305d16d2 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -42,6 +42,244 @@
>   		rdma1 = &rdma1;
>   	};
>   
> +	cluster0_opp: cluster_opp_table0 {

Please don't use underscores in devicetree for anything that's not a phandle.

	cluster0_opp: cluster0-opp-table {

> +		compatible = "operating-points-v2";
> +		opp-shared;
> +		opp0_00 {

Apart from the underscore being invalid, across the kernel, you can find many
instances of opp tables, containing names related to the frequencies, so, for
consistency (this is not a rule!), perhaps it would be a good idea to do so.

		opp-793000000 {

> +			opp-hz = /bits/ 64 <793000000>;
> +			opp-microvolt = <650000>;
> +			required-opps = <&opp2_00>;
> +		};
> +		opp0_01 {

		opp-910000000 {

> +			opp-hz = /bits/ 64 <910000000>;
> +			opp-microvolt = <687500>;
> +			required-opps = <&opp2_01>;
> +		};
> +		opp0_02 {

..snip..

> +		opp0_15 {
> +			opp-hz = /bits/ 64 <1989000000>;
> +			opp-microvolt = <1050000>;
> +			required-opps = <&opp2_15>;

P.S.: Please fix the typo below!

> +		};	};
> +
> +

...also...

> +	cci_opp: opp_table2 {

	cci_opp: cci-opp-table {

> +		compatible = "operating-points-v2";
> +		opp-shared;
> +		opp2_00: opp-273000000 {

This one is fine instead :))

Cheers,
Angelo