Subject: Re: New i2c framework
To: Thor Lancelot Simon <>
From: Bill Studenmund <>
List: tech-kern
Date: 02/19/2002 15:00:13
On Tue, 19 Feb 2002, Thor Lancelot Simon wrote:

> On Tue, Feb 19, 2002 at 12:46:42PM -0800, Bill Studenmund wrote:
> >
> > Mainly as neither i2c nor SMBus (AFAIK) are hot-swap busses; every chip on
> > there the board maker put there. I think the fact that the board maker
> > wants all the chips to be useful (or more to the point doesn't want to
> > wast money on useless chips) ensures that we won't encounter a case where
> > functionality we want from the i2c bus can't be had since it's on an SMBus
> > controller w/o a bit banger.
> FWIW, some of my PC motherboards have jumper blocks labelled "SMBUS", and
> I have other devices in my machines (e.g. the thermal sensor/fan controller
> in my SCA disk cage) that I could at least theoretically plug in to the
> motherboard's SMBus, if I had appropriate wiring.

Well, then I guess we'll have to reserve the right to say, "Sorry, you
loose," if someone plugs in something that needs bit-banging when it's not
available. :-)

Take care,