linux-kernel - Re: [PATCH v2 48/48] ARM: tegra: cardhu: Support CPU voltage scaling and thermal throttling

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Message-ID: <c0cb782a-bd26-917a-8f39-db8b6f460472@linaro.org>
Date:   Thu, 17 Dec 2020 19:28:57 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Kevin Hilman <khilman@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 48/48] ARM: tegra: cardhu: Support CPU voltage scaling
 and thermal throttling

On 17/12/2020 19:06, Dmitry Osipenko wrote:
> Enable CPU voltage scaling and thermal throttling on Tegra30 Cardhu board.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---

Same comments as 47/48



>  arch/arm/boot/dts/tegra30-cardhu.dtsi | 61 ++++++++++++++++++++++++++-
>  1 file changed, 60 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi
> index d74c9ca78a7f..08c0ea4e6228 100644
> --- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
> +++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
> @@ -1,6 +1,9 @@
>  // SPDX-License-Identifier: GPL-2.0
>  #include <dt-bindings/input/input.h>
> +#include <dt-bindings/thermal/thermal.h>
>  #include "tegra30.dtsi"
> +#include "tegra30-cpu-opp.dtsi"
> +#include "tegra30-cpu-opp-microvolt.dtsi"
>  
>  /**
>   * This file contains common DT entry for all fab version of Cardhu.
> @@ -339,12 +342,13 @@ ldo8_reg: ldo8 {
>  			};
>  		};
>  
> -		temperature-sensor@4c {
> +		nct1008: temperature-sensor@4c {
>  			compatible = "onnn,nct1008";
>  			reg = <0x4c>;
>  			vcc-supply = <&sys_3v3_reg>;
>  			interrupt-parent = <&gpio>;
>  			interrupts = <TEGRA_GPIO(CC, 2) IRQ_TYPE_LEVEL_LOW>;
> +			#thermal-sensor-cells = <1>;
>  		};
>  
>  		vdd_core: tps62361@60 {
> @@ -438,6 +442,29 @@ clk32k_in: clock@0 {
>  		#clock-cells = <0>;
>  	};
>  
> +	cpus {
> +		cpu0: cpu@0 {
> +			cpu-supply = <&vddctrl_reg>;
> +			operating-points-v2 = <&cpu0_opp_table>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu@1 {
> +			cpu-supply = <&vddctrl_reg>;
> +			operating-points-v2 = <&cpu0_opp_table>;
> +		};
> +
> +		cpu@2 {
> +			cpu-supply = <&vddctrl_reg>;
> +			operating-points-v2 = <&cpu0_opp_table>;
> +		};
> +
> +		cpu@3 {
> +			cpu-supply = <&vddctrl_reg>;
> +			operating-points-v2 = <&cpu0_opp_table>;
> +		};
> +	};
> +
>  	panel: panel {
>  		compatible = "chunghwa,claa101wb01";
>  		ddc-i2c-bus = <&panelddc>;
> @@ -617,6 +644,38 @@ sound {
>  					 <&tegra_car TEGRA30_CLK_EXTERN1>;
>  	};
>  
> +	thermal-zones {
> +		cpu-thermal {
> +			polling-delay-passive = <1000>; /* milliseconds */
> +			polling-delay = <5000>; /* milliseconds */
> +
> +			thermal-sensors = <&nct1008 1>;
> +
> +			trips {
> +				trip0: cpu-alert0 {
> +					/* throttle at 57C until temperature drops to 56.8C */
> +					temperature = <57000>;
> +					hysteresis = <200>;
> +					type = "passive";
> +				};
> +
> +				trip1: cpu-crit {
> +					/* shut down at 60C */
> +					temperature = <60000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +
> +			cooling-maps {
> +				map0 {
> +					trip = <&trip0>;
> +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +				};
> +			};
> +		};
> +	};
> +
>  	gpio-keys {
>  		compatible = "gpio-keys";
>  
> 


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