Hi Nvidia,
How can more PWM fans be added to the Thor platform?
As I knew, Jetson Thor provides PWM and tachometer functionality for controlling a fan as part of the thermal solution.
The FAN_PWM pin is configured as GP_PWM4
The FAN_TACH pin is configured as NV_THERM_FAN_TACH0
Can nvfancontrol.service recognise the new PWM fan if I want to add it?
hello pomelo.hsieh,
currently we don’t have any node for FAN_TACH1 enabled in the device tree.
Hi JerryChang,
I understand that the device tree does not include an additional FAN_TACH1 setting to read the fan RPM.
Does Nvfancontrol.service only recognize Nvidia’s native fan settings?
I don’t know how nvfancontrol knows the number of fans because it is not open source code.
If I need to add an additional PWM fan, does Nvidia have any suggestions?
Should I use the hwmon PWM fan driver to modify the thermal zone to include cooling maps and a cooling device for the PWM fan?
Thanks.
hello pomelo.hsieh,
please check Jetson Thor Series Modules Interface Design Guide for [Chapter 16. Fan].
FAN_PWM pin is configured as GP_PWM4, you may configure a GPIO pin as PWM for additional PWM fan.
Hi JerryChang,
Would nvfancontrol recognize the new fan if the GPIO pin is configured as PWM for an additional PWM fan?
Could I add a new fan setting to /etc/nvfancontrol.conf?
Following the above design, create two fan settings: one that follows the original NVIDIA design and can read/write PWM and read RPM values, and another that can only read/write PWM and but can’t read RPM values.
Does Nvidia have any suggestions for using more fans with the Jetson Thor platform?
Thanks.
hello pomelo.hsieh,
it’s per your use-case, see Jetson Thor Series Thermal Design Guide for reference.
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