SMBUS(4) BSD Kernel Interfaces Manual SMBUS(4)NAME
smbus -- System Management Bus
SYNOPSIS
device smbus
device iicsmb
device bktr
DESCRIPTION
The 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 Bus
The 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 ALSO bktr(4), iicbus(4), iicsmb(4), smb(4)
The SMBus specification, http://www.smbus.org/specs/.
HISTORY
The smbus manual page first appeared in FreeBSD 3.0.
AUTHORS
This manual page was written by Nicolas Souchu.
BSD August 10, 1998 BSD
Check Out this Related Man Page
VIAPM(4) BSD Kernel Interfaces Manual VIAPM(4)NAME
viapm -- VIA chipsets Power Management controller driver
SYNOPSIS
device iicbb
device iicbus
device iicsmb
device smbus
device smb
device viapm
DESCRIPTION
This driver provides access to the VIA chipset Power Management Unit family. They are VT82C586B, VT82C596A, VT82C596B, VT82C686A and VT8233.
The embedded controller of the VIA chipset may give you access to the monitoring facilities of your mainboard.
The 586B support is made by software whereas other controllers support the SMBus protocol by hardware. See smb(4) for writing user code to
fetch voltages, temperature and so on from the monitoring chip of your mainboard.
SEE ALSO iicbb(4), iicbus(4), iicsmb(4), smb(4), smbus(4)HISTORY
The viapm manual page first appeared in FreeBSD 4.5.
AUTHORS
This manual page was written by Nicolas Souchu <nsouch@FreeBSD.org>.
BUGS
Only polling mode is supported.
BSD April 20, 2002 BSD
Hi All,
For Linux Kernel 2.6.26 :
I am using a I2C bus for command interface from my system when connecting to different devices. I have different I2C frequency requirements from different devices. Can you please suggest me a way to set the I2C frequency based on the device in use at runtime?... (0 Replies)
I have an old hppa workstation install Openbsd on it,suppose
i want to use bktr driver on it,i see bktr is configured on some archs(amd64,i386,ppc) but not on hppa,can i use
the bktr driver line from amd64 or i386 in Generic kernel or custom kernel config? (3 Replies)