Synaptics Tmp 2970 Driver -

A power surge or BIOS update reset the TPM bus. Fix:

cat /sys/bus/iio/devices/iio:device0/in_temp_raw cat /sys/bus/iio/devices/iio:device0/in_temp_scale # Multiply raw * scale to get degrees Celsius synaptics tmp 2970 driver

Most distros auto-detect with tpm_tis_spi . If not: A power surge or BIOS update reset the TPM bus