From owner-freebsd-acpi@FreeBSD.ORG  Wed Dec  9 16:25:54 2009
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Date: Thu, 10 Dec 2009 03:27:21 +1100 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: Hajimu UMEMOTO <ume@freebsd.org>
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Cc: freebsd-acpi@freebsd.org
Subject: Re: ACPI temperature
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On Wed, 9 Dec 2009, Hajimu UMEMOTO wrote:
 > Hi,
 > 
 > >>>>> On Wed, 9 Dec 2009 12:16:49 +1100 (EST)
 > >>>>> Ian Smith <smithi@nimnet.asn.au> said:
 > 
 > smithi> The maths looks right.  But I don't understand what you mean here:
 > 
 > smithi> +.It Fl k
 > smithi> +Show temperature in Kelvin.
 > smithi> +The value is decupled.
 > 
 > smithi> That would be 'decoupled', but, The value is decoupled from what?
 > 
 > Oops, I meant "The value is multiplied by 10".

+                               if (mv < 0 || ik_unit == IK_KELVIN)
                                        printf("%jd", mv);
+                               else if (ik_unit == IK_FAHRENHEIT)
+                                       printf("%.1fF",
+                                           (mv - 2732.0) * 9 / 50 + 32.0);
                                else
                                        printf("%.1fC", (mv - 2732.0) / 10);

Ah, so then units are in tenths of a degree Kelvin?  Any special reason 
to prefer not showing it with printf("%.1fK", mv / 10); like the others?

cheers, Ian  (possibly jumping in out of my depth :)