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4000 RPM Fan limit on FW16? #61

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ltcptgeneral opened this issue Mar 2, 2025 · 1 comment
Open

4000 RPM Fan limit on FW16? #61

ltcptgeneral opened this issue Mar 2, 2025 · 1 comment

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@ltcptgeneral
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Hello. While using ectool, I noticed that setting the fan's RPM using pwmsetfanrpm did not match the reported RPM from pwmgetfanrpm.

Image

Trying speeds below 4000 RPM, it does match. It seems that there is a maximum fan RPM allowed in pwmsetfanrpm. However, by using fanduty 100, the fan reaches its maximum of ~5500 RPM.

The 4000 RPM limit also seems to be the maximum that the default fan curve will reach. Why is the limit in place, and is it possible to increase this limit?
@ltcptgeneral
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I think i've narrowed it down to EmbeddedController/zephyr/program/framework/lotus/fan.dtsi. I guess in order to change this I have to rebbuild and reflash. It would be nice if this was changeable from ectool directly.

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@ltcptgeneral