Date: Thu, 03 Sep 1998 14:14:25 +0000 From: Mike Smith <mike@smith.net.au> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: Nicolas Souchu <nsouch@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/smbus - Imported sources Message-ID: <199809031414.OAA01394@dingo.cdrom.com> In-Reply-To: Your message of "Thu, 03 Sep 1998 16:59:13 -0400." <199809032059.QAA10027@khavrinen.lcs.mit.edu>
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> <<On Thu, 3 Sep 1998 13:52:54 -0700 (PDT), Nicolas Souchu <nsouch@FreeBSD.ORG> said: > > > System Management Bus generic support over new bus architecture. > > Can you explain a bit more what this is about? I can probably help here if Nicolas doesn't mind. There are a few interrelated things (finally!) coming to fruition here. - Doug Rabson's new bus architecture code debuts on the i386 with the iicbus and smbus. There are manpages for this in http://www.freebsd.org/~dfr/man9.diff - iicbus is a generic bus infrastructure supporting the Phillips i2c bus. The iicbus code includes support for ip-over-i2c, which may be a first for open-source systems. i2c is also used for talking to various components in video cards, tuners, etc. With appropriate device-level support, this provides for driving i2c peripherals in embedded environments. - The System Management bus is an i2c-like bus which is used in PC systems (but may also be used elsewhere) for communicating with things like environmental sensors, smart batteries, etc. Typically the SMbus is hung off the Intel PIIX4 or equivalent. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com
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