topic i.MX8M Mini Linux thermal zone action in i.MX Processors

i.MX8M Mini Linux thermal zone action

m_c — Thu, 26 Dec 2019 00:26:35 GMT

May we have more detail actions (ex: lower frequency) if reach alert and critical temperature point?

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi?h=imx_4.14.98_2.0.0_ga#n382

thermal-zones {

/* cpu thermal */

cpu-thermal {

polling-delay-passive = <250>;

polling-delay = <2000>;

thermal-sensors = <&tmu>;

trips {

cpu_alert0: trip0 {

temperature = <85000>;

hysteresis = <2000>;

type = "passive";

};

cpu_crit0: trip1 {

temperature = <95000>;

hysteresis = <2000>;

type = "critical";

};

cooling-maps {

map0 {

trip = <&cpu_alert0>;

cooling-device =

<&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

};

Re: i.MX8M Mini Linux thermal zone action

igorpadykov — Tue, 31 Dec 2019 00:42:39 GMT

Hi m.c.

seems details can be found only in sources of thermal drivers described in

sect.2.9.3 Source Code Structure attached Linux Manual.

Best regards
igor
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Re: i.MX8M Mini Linux thermal zone action

marcelziswiler — Wed, 10 Feb 2021 00:45:49 GMT

BTW: Looks like later NXP BSP releases now do have such settings available in the regular device tree:

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8mm.dtsi?h=imx_5.4.70_2.3.0#n126