Porting OpenBSD's sysctl hw.sensors framework to FreeBSD

[M. Warner Losh]

In message: <200707101833.l6AIX0xl049962 at ambrisko.com>
            Doug Ambrisko <ambrisko at ambrisko.com> writes:
: John-Mark Gurney writes:
: | Constantine A. Murenin wrote this message on Sat, Jul 07, 2007 at 21:43 -0400:
: | > Hardware sensors tree is going to be pretty deep down. Under sysctl(8) 
: | > the variable names will look like this:
: | > 
: | > 	hw.sensors.lm0.temp0
: | > 
: | > whereas in reality, the tree has five levels:
: | > 
: | > 	hw.sensors.lm0.temp.0
: | 
: | I'm curious, why do we want/need these in the kernel as opposed to a
: | userland library/utility to provide this info?
: 
: I agree.  There are so many different flavours of HW monitoring chips
: and several tools that can read them live in ports.  Lots of them are
: slightly different, intefaces can be i2c or direct I/O.  We are already
: somewhat battling with the various ways IPMI controllers can be attached
: to the system.  Now in the case of IPMI there is a good win in providing
: a device driver interface for the HW and user land tools to get info.
: out of them.  I don't see a win with this in the various HW monitoring 
: chips.

My big concern is the 'automatic' probing.  It doesn't mix well with
i2c eeprom chips :-(

Warner