SMBus Driver for PIIX4 on FreeBSD
What is SMbus?
SMbus is acronim for "System Management Bus".This bus is physically
like Philips's I2C bus.This bus is connected to
http://www.freebsd.org/~nsouch/iicbus.html framework is exist.
- Hardware Monitoring chip.( CPU/Case TEMP, FAN speed, Voltage mater).
- EEPROM in DIMM (a.k.a SPD, Serial Presence Ditection)
- Wakeup on LAN connector.
- Laptop Smart Battery System.
- and so on....
ACPI specification contains
SMBus as a way to access it.
The driver is already commited in
,and if there is update ,I'll put here..
Some of example SMBus Application is here.
This Contains LM75/78 monitor and Serial Presence Detection reader.
See also My ACPI page.