Re: Tachometer speed returned rather than absolute fan speed?

From: Jean Delvare
Date: Fri Mar 07 2014 - 10:25:34 EST


Hi Laszlo,

On Fri, 7 Mar 2014 14:48:01 +0000, Laszlo Papp wrote:
> In medias res, I find this interface cumbersome:
> http://lxr.free-electrons.com/source/Documentation/hwmon/max6650#L31
>
> It returns tachometer speed rather than actual fan speed when you deal
> with the fan1_target interface. That would be way more convenient for
> end users like me.
>
> Is there any reason for not returning absolute fan speed? I guess,
> this would break the behavior now. However, that would be a really
> useful convenient feature. Is it possible to add a new interface for
> that?

I'm quite confused. While I admit that the term "tachometer speed" is
awkward, the max6650 driver is reporting fan speeds in RPM as every
other hwmon driver. So I really have no idea what you think is wrong.
What did you think "tachometer speed" was, if not the fan speed? Does
the max6650 driver not return correct fan speeds for you?

--
Jean Delvare
SUSE L3 Support
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