imx8mq: thermal: Industrial grade trip_point setting

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imx8mq: thermal: Industrial grade trip_point setting

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xoduddk123
Contributor II

I'm using the industrial grade of the i.MX 8M.(MIMX8MQ6CVAHZAB)
In the device-tree, there is something related to temperature.

	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 {
					temperature = <90000>;
					hysteresis = <2000>;
					type = "critical";
				};
			};
/sys/devices/virtual/thermal/thermal_zone0# cat trip_point_0_temp
80000
/sys/devices/virtual/thermal/thermal_zone0# cat trip_point_1_temp
90000


When using the Industrial grade of the i.MX 8M, is it okay to raise this standard as follows?

passive: 90
critical: 100


U-Boot: rel_imx_5.4.70_2.3.0
Kernel: rel_imx_5.4.70_2.3.0

regards,
kwon

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953 次查看
Yuri
NXP Employee
NXP Employee

@xoduddk123 
Hello,

  Temperature of 100 C is very high, since temperature sensor
accuracy of 10 C is not taken into account there.

  Default settings in our BSP may be left as is.
The temperature settings  in themselves are not the problem for thermal considerations:
the main problem is how to implement optimal power dissipation in system.

   Also:

https://community.nxp.com/t5/i-MX-Processors/i-MX8M-mini-thermal-zone-issue-passive-critical-trip-po...

 

Regards,
Yuri.

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954 次查看
Yuri
NXP Employee
NXP Employee

@xoduddk123 
Hello,

  Temperature of 100 C is very high, since temperature sensor
accuracy of 10 C is not taken into account there.

  Default settings in our BSP may be left as is.
The temperature settings  in themselves are not the problem for thermal considerations:
the main problem is how to implement optimal power dissipation in system.

   Also:

https://community.nxp.com/t5/i-MX-Processors/i-MX8M-mini-thermal-zone-issue-passive-critical-trip-po...

 

Regards,
Yuri.

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