topic Re: iMX8m cpu temperature in i.MX Processors

iMX8m cpu temperature

pingyuchen — Tue, 26 Feb 2019 05:06:50 GMT

Hi,

My app wants to get the cpu's real time temperature. How do I get it? I use imx8m android8.1.

Thanks!

Re: iMX8m cpu temperature

fangfang — Tue, 26 Feb 2019 06:57:28 GMT

Hello,

Unfortunately, there is not the information for it.Sorry for the inconvenience may cause.

Have a great day,
TIC

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Re: iMX8m cpu temperature

pingyuchen — Tue, 26 Feb 2019 07:12:50 GMT

Thank you for your reply.

But when the cpu temperature is high than 90 degree Celsius(I forget the accuracy value), there is an output information about the temperature alarm and it includes the temperature value. Where is it from?

Thanks!

Re: iMX8m cpu temperature

pingyuchen — Tue, 26 Feb 2019 07:20:06 GMT

the output information is as following:

CPU: Commercial temperature grade (0C to 95C)CPU Temperature (101000C) has beyond alert (85000C), close to critical (95000C) waiting...
CPU Temperature (104000C) has beyond alert (85000C), close to critical (95000C) waiting...
CPU Temperature (105000C) has beyond alert (85000C), close to critical (95000C) waiting...

Re: iMX8m cpu temperature

fangfang — Wed, 27 Feb 2019 02:04:36 GMT

Hello,

The information is from TempSensor (Temperature alarm) of CPU.
Have a great day,
TIC

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Re: iMX8m cpu temperature

pingyuchen — Wed, 27 Feb 2019 03:46:48 GMT

Hi fangfang,

I am confused about imx8mq's tmu driver. In fsl-im8mq.dtsi, tmu has been defined. And I can find its driver file in kernel(./kernel/driver/thermal/qoriq_thermal.c). And this file is compiled,because CONFIG_IMX8M_THERMAL is set.

But I find that this driver doesn't be loaded when booting.

Could you know why? Whether I need write another driver for it?

Thanks!

Re: iMX8m cpu temperature

pingyuchen — Wed, 27 Feb 2019 09:13:53 GMT

Hi fangfang,

I found that CONFIG_IMX8M_THERMAL isn't set in .config file, but it is set in android_deconfig file. I don't know why android_deconfig can't make a correct .config file. Finally I found CONFIG_PCI isn't set in android_deconfig, it affects CONFIG_IMX8M_THERMAL. If CONFIG_PCI is set in android_deconfig, CONFIG_IMX8M_THERMAL is set successfully in .config.

But I don't know why. In our application, we don't use PCI.

Could you help me?

Thanks!