linux-kernel - Re: [PATCH] arm64: dts: ls1028a: Add Thermal Monitor Unit node

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Date:   Tue, 28 May 2019 19:53:32 -0700
From:   Eduardo Valentin <edubezval@...il.com>
To:     Yuantian Tang <andy.tang@....com>
Cc:     shawnguo@...nel.org, leoyang.li@....com, robh+dt@...nel.org,
        mark.rutland@....com, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, daniel.lezcano@...aro.org,
        rui.zhang@...el.com
Subject: Re: [PATCH] arm64: dts: ls1028a: Add Thermal Monitor Unit node

On Thu, Apr 25, 2019 at 04:26:40PM +0800, Yuantian Tang wrote:
> The Thermal Monitoring Unit (TMU) monitors and reports the
> temperature from 2 remote temperature measurement sites
> located on ls1028a chip.
> Add TMU dts node to enable this feature.
> 
> Signed-off-by: Yuantian Tang <andy.tang@....com>

I dont see anything wrong from a thermal standpoint.

Acked-by: Eduardo Valentin <edubezval@...il.com>

Please get this via your arch tree maintainer to avoid merge conflicts.

> ---
>  arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi |  114 ++++++++++++++++++++++++
>  1 files changed, 114 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> index b045812..a25f5fc 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> @@ -29,6 +29,7 @@
>  			clocks = <&clockgen 1 0>;
>  			next-level-cache = <&l2>;
>  			cpu-idle-states = <&CPU_PH20>;
> +			#cooling-cells = <2>;
>  		};
>  
>  		cpu1: cpu@1 {
> @@ -39,6 +40,7 @@
>  			clocks = <&clockgen 1 0>;
>  			next-level-cache = <&l2>;
>  			cpu-idle-states = <&CPU_PH20>;
> +			#cooling-cells = <2>;
>  		};
>  
>  		l2: l2-cache {
> @@ -398,6 +400,118 @@
>  			status = "disabled";
>  		};
>  
> +		tmu: tmu@...0000 {
> +			compatible = "fsl,qoriq-tmu";
> +			reg = <0x0 0x1f80000 0x0 0x10000>;
> +			interrupts = <0 23 0x4>;
> +			fsl,tmu-range = <0xb0000 0xa0026 0x80048 0x70061>;
> +			fsl,tmu-calibration = <0x00000000 0x00000024
> +					       0x00000001 0x0000002b
> +					       0x00000002 0x00000031
> +					       0x00000003 0x00000038
> +					       0x00000004 0x0000003f
> +					       0x00000005 0x00000045
> +					       0x00000006 0x0000004c
> +					       0x00000007 0x00000053
> +					       0x00000008 0x00000059
> +					       0x00000009 0x00000060
> +					       0x0000000a 0x00000066
> +					       0x0000000b 0x0000006d
> +
> +					       0x00010000 0x0000001c
> +					       0x00010001 0x00000024
> +					       0x00010002 0x0000002c
> +					       0x00010003 0x00000035
> +					       0x00010004 0x0000003d
> +					       0x00010005 0x00000045
> +					       0x00010006 0x0000004d
> +					       0x00010007 0x00000045
> +					       0x00010008 0x0000005e
> +					       0x00010009 0x00000066
> +					       0x0001000a 0x0000006e
> +
> +					       0x00020000 0x00000018
> +					       0x00020001 0x00000022
> +					       0x00020002 0x0000002d
> +					       0x00020003 0x00000038
> +					       0x00020004 0x00000043
> +					       0x00020005 0x0000004d
> +					       0x00020006 0x00000058
> +					       0x00020007 0x00000063
> +					       0x00020008 0x0000006e
> +
> +					       0x00030000 0x00000010
> +					       0x00030001 0x0000001c
> +					       0x00030002 0x00000029
> +					       0x00030003 0x00000036
> +					       0x00030004 0x00000042
> +					       0x00030005 0x0000004f
> +					       0x00030006 0x0000005b
> +					       0x00030007 0x00000068>;
> +			little-endian;
> +			#thermal-sensor-cells = <1>;
> +		};
> +
> +		thermal-zones {
> +			core-cluster {
> +				polling-delay-passive = <1000>;
> +				polling-delay = <5000>;
> +				thermal-sensors = <&tmu 0>;
> +
> +				trips {
> +					core_cluster_alert: core-cluster-alert {
> +						temperature = <85000>;
> +						hysteresis = <2000>;
> +						type = "passive";
> +					};
> +
> +					core_cluster_crit: core-cluster-crit {
> +						temperature = <95000>;
> +						hysteresis = <2000>;
> +						type = "critical";
> +					};
> +				};
> +
> +				cooling-maps {
> +					map0 {
> +						trip = <&core_cluster_alert>;
> +						cooling-device =
> +							<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> +							<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +					};
> +				};
> +			};
> +
> +			ddr-controller {
> +				polling-delay-passive = <1000>;
> +				polling-delay = <5000>;
> +				thermal-sensors = <&tmu 1>;
> +
> +				trips {
> +					ddr_controller_alert: ddr-controller-alert {
> +						temperature = <85000>;
> +						hysteresis = <2000>;
> +						type = "passive";
> +					};
> +
> +					ddr_controller_crit: ddr-controller-crit {
> +						temperature = <95000>;
> +						hysteresis = <2000>;
> +						type = "critical";
> +					};
> +				};
> +
> +				cooling-maps {
> +					map0 {
> +						trip = <&ddr_controller_alert>;
> +						cooling-device =
> +							<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> +							<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +					};
> +				};
> +			};
> +		};
> +
>  		pcie@...000000 { /* Integrated Endpoint Root Complex */
>  			compatible = "pci-host-ecam-generic";
>  			reg = <0x01 0xf0000000 0x0 0x100000>;