Re: [PATCH v4 1/2] dt-bindings: hwmon: pwm-fan: Document default-pwm property

Guenter Roeck
2025-01-05T17:22:08Z

On 1/3/25 11:58, Rob Herring wrote:

>
> But RPM is ultimately what you care about and is the fan parameter
> that's universal yet independent of the underlying control. RPM is what
> determines noise and power consumption.
>

I forgot to add: I would argue that airflow restrictions play a substantial
role for both power consumption and noise, especially when trying to achieve
a specific fan speed. For power consumption, I don't even see how rpm would
play a substantial role in the first place since power consumption depends
on pwm, not on the resulting rpm (or airflow).

Guenter