linux-kernel - Re: [PATCH v7 3/3] arm64: dts: imx91: Add thermal-sensor and thermal-zone support

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Message-ID: <aVwaCbSbDZ2mI35c@lizhi-Precision-Tower-5810>
Date: Mon, 5 Jan 2026 15:07:37 -0500
From: Frank Li <Frank.li@....com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Pengfei Li <pengfei.li_1@....com>,
	Marco Felsch <m.felsch@...gutronix.de>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, ye.li@....com, joy.zou@....com
Subject: Re: [PATCH v7 3/3] arm64: dts: imx91: Add thermal-sensor and
 thermal-zone support

On Mon, Oct 20, 2025 at 03:00:42PM -0400, Frank Li wrote:
> Add thermal-sensor and thermal-zone support.
>
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---

Shawn:
	binding already in linux-next.  Alberto's comments is not related
with thermal-sensor part.

Frank

> changes in v7
> - new patch
> ---
>  arch/arm64/boot/dts/freescale/imx91.dtsi | 58 ++++++++++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx91.dtsi b/arch/arm64/boot/dts/freescale/imx91.dtsi
> index 4d8300b2a7bca33bd0613db9e79d2fba6b40c052..f075592bfc01f1eb94d2a2bd8eea907cc2aed090 100644
> --- a/arch/arm64/boot/dts/freescale/imx91.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx91.dtsi
> @@ -6,6 +6,54 @@
>  #include "imx91-pinfunc.h"
>  #include "imx91_93_common.dtsi"
>
> +/{
> +	thermal-zones {
> +		cpu-thermal {
> +			polling-delay-passive = <250>;
> +			polling-delay = <2000>;
> +			thermal-sensors = <&tmu 0>;
> +
> +			trips {
> +				cpu_alert: cpu-alert {
> +					temperature = <80000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				cpu_crit: cpu-crit {
> +					temperature = <90000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +
> +			cooling-maps {
> +				map0 {
> +					trip = <&cpu_alert>;
> +					cooling-device =
> +						<&A55_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
> +&aips1 {
> +	tmu: thermal-sensor@...82000 {
> +		compatible = "fsl,imx91-tmu";
> +		reg = <0x44482000 0x1000>;
> +		#thermal-sensor-cells = <0>;
> +		clocks = <&clk IMX93_CLK_TMC_GATE>;
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>,
> +			     <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>,
> +			     <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
> +		interrupt-names = "thr1", "thr2", "ready";
> +		nvmem-cells = <&tmu_trim1>, <&tmu_trim2>;
> +		nvmem-cell-names = "trim1", "trim2";
> +	};
> +};
> +
>  &clk {
>  	compatible = "fsl,imx91-ccm";
>  };
> @@ -69,3 +117,13 @@ &media_blk_ctrl {
>  	clock-names = "apb", "axi", "nic", "disp", "cam",
>  		      "lcdif", "isi", "csi";
>  };
> +
> +&ocotp {
> +	tmu_trim1: tmu-trim@a0 {
> +		reg = <0xa0 0x4>;
> +	};
> +
> +	tmu_trim2: tmu-trim@a4 {
> +		reg = <0xa4 0x4>;
> +	};
> +};
>
> --
> 2.34.1
>