linux-kernel - Re: [RFC 5/5] arm64: dts: imx8mq: Add the opp table and the cpu-supply nodes

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Message-ID: <76b2c0e4a61d022f7f798990af4dfd8b@www.akkea.ca>
Date:   Thu, 14 Feb 2019 16:55:22 -0800
From:   Angus Ainslie <angus@...ea.ca>
To:     Abel Vesa <abel.vesa@....com>
Cc:     Rob Herring <robh@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mike Turquette <mturquette@...libre.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Lucas Stach <l.stach@...gutronix.de>,
        Angus Ainslie <angus.ainslie@...i.sm>,
        Anson Huang <anson.huang@....com>,
        dl-linux-imx <linux-imx@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel-owner@...r.kernel.org
Subject: Re: [RFC 5/5] arm64: dts: imx8mq: Add the opp table and the  cpu-supply nodes

On 2019-02-13 11:05, Abel Vesa wrote:
> Add the opp table containing only non over drive opps.
> Also add the cpu-supply nodes for the A53 cores in the EVK board.
> 
> Signed-off-by: Abel Vesa <abel.vesa@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 17 +++++++++++++++++
>  arch/arm64/boot/dts/freescale/imx8mq.dtsi    | 23 
> +++++++++++++++++++++++
>  2 files changed, 40 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> index 54737bf..114359e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> @@ -31,6 +31,23 @@
>  		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
>  		enable-active-high;
>  	};
> +
> +};
> +
> +&A53_0 {
> +	cpu-supply = <&sw1a_reg>;
> +};
> +
> +&A53_1 {
> +	cpu-supply = <&sw1a_reg>;
> +};
> +
> +&A53_2 {
> +	cpu-supply = <&sw1a_reg>;
> +};
> +
> +&A53_3 {
> +	cpu-supply = <&sw1a_reg>;
>  };
> 
>  &fec1 {
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> index 1a89062..89b2d5f 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> @@ -91,6 +91,7 @@
>  			clocks = <&clk IMX8MQ_CLK_ARM>;
>  			enable-method = "psci";
>  			next-level-cache = <&A53_L2>;
> +			operating-points-v2 = <&a53_0_opp_table>;
>  		};
> 
>  		A53_1: cpu@1 {
> @@ -101,6 +102,7 @@
>  			clocks = <&clk IMX8MQ_CLK_ARM>;
>  			enable-method = "psci";
>  			next-level-cache = <&A53_L2>;
> +			operating-points-v2 = <&a53_0_opp_table>;
>  		};
> 
>  		A53_2: cpu@2 {
> @@ -111,6 +113,7 @@
>  			clocks = <&clk IMX8MQ_CLK_ARM>;
>  			enable-method = "psci";
>  			next-level-cache = <&A53_L2>;
> +			operating-points-v2 = <&a53_0_opp_table>;
>  		};
> 
>  		A53_3: cpu@3 {
> @@ -121,6 +124,7 @@
>  			clocks = <&clk IMX8MQ_CLK_ARM>;
>  			enable-method = "psci";
>  			next-level-cache = <&A53_L2>;
> +			operating-points-v2 = <&a53_0_opp_table>;
>  		};
> 
>  		A53_L2: l2-cache0 {
> @@ -666,6 +670,25 @@
>  			status = "disabled";
>  		};
> 
> +
> +		a53_0_opp_table: opp-table {
> +			compatible = "operating-points-v2";
> +			opp-shared;
> +
> +			opp-800000000 {
> +				opp-hz = /bits/ 64 <800000000>;
> +				opp-microvolt = <900000>;
> +				clock-latency-ns = <150000>;
> +			};
> +
> +			opp-1000000000 {
> +				opp-hz = /bits/ 64 <1000000000>;
> +				opp-microvolt = <900000>;

Shouldn't this be

opp-microvolt = <1000000>;

> +				clock-latency-ns = <150000>;
> +				opp-suspend;
> +			};
> +		};
> +
>  		gic: interrupt-controller@...00000 {
>  			compatible = "arm,gic-v3";
>  			reg = <0x38800000 0x10000>,	/* GIC Dist */