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Date: Wed, 11 Jul 2007 00:41:43 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
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To: Poul-Henning Kamp <phk@phk.freebsd.dk>
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Cc: Rui Paulo <rpaulo@fnop.net>, Shteryana Shopova <syrinx@FreeBSD.org>,
	freebsd-arch@FreeBSD.org, "Constantine A. Murenin" <cnst@FreeBSD.org>
Subject: Re: Porting OpenBSD's sysctl hw.sensors framework to FreeBSD 
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On Tue, 10 Jul 2007, Poul-Henning Kamp wrote:

> Physical measurements are only relevant in the context of their physical 
> location and the OpenBSD enumeration doesn't even encode this, it is only 
> interested in the logical location of the sensor, what kind of bus it is on, 
> what kind of address it has.
>
> For any hw-sensor namespace to make sense, it must, as a minimum, identify 
> the sensors in terms of the device(-drivers) associated with the hardware 
> where the sensor senses, not the device-driver of the sensor itself.
>
> The OpenBSD stuff is a 1980 style hack, and should not be propagated.

This argument would be more convincing if accompanied by a concrete example, 
fabricated or otherwise.  Are you suggesting, for example, adding newbus 
sensor methods associated with existing driver attachments?

Robert N M Watson
Computer Laboratory
University of Cambridge