linux-kernel - Tachometer speed returned rather than absolute fan speed?

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Message-ID: <CAOMwXhPXPN+21N11cHBENvw0QZ1qPvo9GTbM9V2SwDmgBQZssw@mail.gmail.com>
Date:	Fri, 7 Mar 2014 14:48:01 +0000
From:	Laszlo Papp <lpapp@....org>
To:	LKML <linux-kernel@...r.kernel.org>, lm-sensors@...sensors.org,
	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.de>
Subject: Tachometer speed returned rather than absolute fan speed?

Hi,

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?

Cheers, L.
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