How do I read the local CPU temperatures from user space

tmorrison — Wed, 07 Oct 2020 00:25:32 GMT

I tried to google and search through this forum, but I haven't found anything close to this.

Environment:

I am running a LS1043a CPU with OpenWrt from qoriq-components repository.

In section 35 of the LS1043A Reference Manual, it says there are 5 local temperature sensors?

Are these registers available to be read (do they need to be calibrated)?

I guess what I'm saying is that I don't really know how to use the TMU and what I need to configure in the device tree to be able to use it. There seems no guide.

The default LS1043a device tree has "thermal_zones". Are these the sensors (although they have eight(8) thermal zones (0-8) in the device tree).

I am happy to read manuals if there was one.

Thanks in advance!

Re: How do I read the local CPU temperatures from user space

bpe — Wed, 14 Oct 2020 12:26:05 GMT

The processor temperature sensors can be read via SYSFS. LSDK online documentation has a article explaining how to enable and use it. The recommendations are very basic and should work in any distro.

Hope it helps,
Platon

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How do I read the local CPU temperatures from user space

Re: How do I read the local CPU temperatures from user space