Various RPM value at PWM value 255 in Xavier NX

This question is related to the following post.
https://forums.developer.nvidia.com/t/read-the-pwm-fan-rpm-in-jetson-nx/183128/3

When we checked the “/sys/devices/pwm-fan/pwm_rpm_table”, I found out that there are some RPM value at 255.
Could you please tell us the difference below:
(4, 4000, 255, 1, 1)
(5, 5000, 255, 1, 1)
(6, 6000, 255, 1, 1)
(7, 7000, 255, 1, 1)
(8, 10000, 255, 1, 1)
(9, 11000, 255, 1, 1)

thanks

What’s your Jetpack version in use?

This table is coming from the device tree.
There are 10 entries in this table (active_steps).
It seems the entries higher than RPM=4000 are dummy since there might be different kinds of fan in use.

You could just realize this table as following:
If I want to get RPM=1000, the PWM should be configured as 130.
If I want to get RPM=4000, the PWM should be configured as 255.
If I want to get RPM=5000, the PWM should be configured as 255.
If I want to get RPM=10000, the PWM should be configured as 255.

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