Copyright (c) 1998, Nicolas Souchu All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or ot...
NAMEsmbus - System Management Bus
device iicsmb device bktr
DESCRIPTIONThe smbus system provides a uniform, modular and architecture-independent system for the implementation of drivers to control various SMB devices and to utilize different SMB controllers (I2C, PIIX4, Brooktree848, vm86...).
System Management BusThe System Management Bus is a two-wire interface through which simple power-related chips can communicate with rest of the system. It uses I2C as its backbone (see iicbus(4)).
A system using SMB passes messages to and from devices instead of tripping individual control lines.
With the SMBus, a device can provide manufacturer information, tell the system what its model/part number is, save its state for a suspend event, report different types of errors, accept control parameters, and return its status.
The SMBus may share the same host device and physical bus as ACCESS bus components provided that an appropriate electrical bridge is provided between the internal SMB devices and external ACCESS bus devices.
SEE ALSObktr(4), iicbus(4), iicsmb(4), smb(4)
- The SMBus specification