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Thermal logging helps to understand the active configurations of the thermal zones and the existing thermal mitigation levels. To retrieve thermal configuration and active mitigation levels, use ftrace logs.

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ftrace method

To enable thermal ftrace logs, run the following commands: 
echo 1 > /sys/kernel/tracing/events/thermal/enable
The following are the log snippets of different thermal events:
/* In the following snippet, "cpu0-thermal" represents thermal zone and “temp” indicates existing temperature of thermal zone */
sh-1420    [001] ..... 1132975.934216: thermal_temperature: thermal_zone=cpu0-thermal id=13 temp_prev=47700 temp=110000
/*In the following snippet, “trip” indicates trip level and trip level 1 is triggered for cpu0-thermal thermal zone*/
sh-1420    [001] ..... 1132975.934449: thermal_zone_trip: thermal_zone=cpu0-thermal id=13 trip=1 trip_type=PASSIVE
/*In the following snippet, “type” represents the cooling device and "target" represents active mitigation of the cooling device*/
sh-1420 [001] ..... 1132975.934473: cdev_update: type=idle-cpu0 target=100
Note The log snippet for IQ-8275 and IQ-615 will be updated in a future release.