linux-kernel - Re: [PATCH V4 4/4] ARM64: dts: imx: add i.MX8QXP thermal support

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Date:   Thu, 29 Nov 2018 08:50:41 -0800
From:   Eduardo Valentin <edubezval@...il.com>
To:     Anson Huang <anson.huang@....com>
Cc:     "rui.zhang@...el.com" <rui.zhang@...el.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        Aisheng DONG <aisheng.dong@....com>,
        Andy Gross <andy.gross@...aro.org>,
        "heiko@...ech.de" <heiko@...ech.de>,
        "horms+renesas@...ge.net.au" <horms+renesas@...ge.net.au>,
        "arnd@...db.de" <arnd@...db.de>,
        "amit.kucheria@...aro.org" <amit.kucheria@...aro.org>,
        "enric.balletbo@...labora.com" <enric.balletbo@...labora.com>,
        "ezequiel@...labora.com" <ezequiel@...labora.com>,
        "olof@...om.net" <olof@...om.net>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "LW@...O-electronics.de" <LW@...O-electronics.de>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH V4 4/4] ARM64: dts: imx: add i.MX8QXP thermal support

On Thu, Nov 29, 2018 at 02:37:47AM +0000, Anson Huang wrote:
> Add i.MX8QXP CPU thermal zone support.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> ChangeLog:
> V3->V4:
>   *move the tsens node to inside of SCU node as it is belonging to SCU.
> ---
>  arch/arm64/boot/dts/freescale/imx8qxp.dtsi | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> index 9b08688..48f622c 100644
> --- a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> @@ -9,6 +9,7 @@
>  #include <dt-bindings/firmware/imx/rsrc.h>
>  #include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/pinctrl/pads-imx8qxp.h>
> +#include <dt-bindings/thermal/thermal.h>
>  
>  #include "imx8-ca35.dtsi"
>  
> @@ -87,6 +88,12 @@
>  		rtc: rtc {
>  			compatible = "fsl,imx8qxp-sc-rtc";
>  		};
> +
> +		tsens: thermal-sensor {
> +			compatible = "fsl,imx8qxp-sc-thermal";
> +			tsens-num = <1>;
> +			#thermal-sensor-cells = <1>;
> +		};
>  	};
>  
>  	adma_subsys: bus@...00000 {
> @@ -410,4 +417,24 @@
>  		#size-cells = <1>;
>  		ranges = <0x5f000000 0x0 0x5f000000 0x1000000>;
>  	};
> +
> +	thermal_zones: thermal-zones {
> +		cpu-thermal0 {
> +			polling-delay-passive = <250>;
> +			polling-delay = <2000>;
> +			thermal-sensors = <&tsens 355>;
> +			trips {
> +				cpu_alert0: trip0 {
> +					temperature = <107000>;
> +					hysteresis = <2000>;
> +					type = "passive";

Passive, but yet no cooling maps?

> +				};
> +				cpu_crit0: trip1 {
> +					temperature = <127000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +		};
> +	};
>  };
> -- 
> 2.7.4
>