AM4376: internal temp sensor

user5762401

Part Number: AM4376
Other Parts Discussed in Thread: AM6252,

Tool/software:

I was able to read the internal temperature of the AM6252，The command is “cat /sys/class/thermal/thermal_zone0/temp”，But I can't read the internal temperature of AM4376.

Is there an internal temperature sensor in this device?

Or the command is different in AM437x?

Thanks and regards,

burton

1 day ago

0 Anshu Madwesh 1 day ago

TI__Genius 11830 points

Hi Burton,

For AM62x, there is a thermal zone defined in the device tree so the on-die temperature sensors can be read: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi?h=ti-linux-6.1.y

AM437x does not have the same device tree definition.

You can try reading the register itself. See section 7.3.1.9 CTRL_BANDGAP Register, Bit Field 15-8 DTEMP in the AM437x TRM: https://www.ti.com/lit/ug/spruhl7i/spruhl7i.pdf

Best Regards,

Anshu

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AM4376: internal temp sensor