# Re: \[PATCH 1/4\] arm64: dts: imx8mm-venice-gw700x: override thermal cfg for industrial temp

- From: Frieder Schrempf \<hidden\>
- Date: 2021-06-02 07:11:05 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/06/8191694
- Thread: https://ratatoskr.run/linux-devicetree/2021/06/8191673/t.md

```text
On 01.06.21 19:49, Tim Harvey wrote:
> Override the default temperature alert/crit for Industrial temp IMX8M
> Mini.
> 
> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
> ---
>  .../boot/dts/freescale/imx8mm-venice-gw700x.dtsi     | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw700x.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw700x.dtsi
> index c769fadbd008..512b76cd7c3b 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw700x.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw700x.dtsi
> @@ -493,3 +493,15 @@
>  		>;
>  	};
>  };
> +
> +&cpu_alert0 {
> +	temperature = <95000>;
> +	hysteresis = <2000>;
> +	type = "passive";
> +};
> +
> +&cpu_crit0 {
> +	temperature = <105000>;
> +	hysteresis = <2000>;
> +	type = "critical";
> +};

As this is not really board-specific, I think the proper way to handle this for all boards is to let the thermal driver read the temperature grading from the OTP fuses and set the trip-points accordingly, similar to what is done on i.MX6 [1].

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/thermal/imx_thermal.c?h=v5.13-rc4#n508

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