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GLXIIC(4) FreeBSD Kernel Interfaces Manual (i386) GLXIIC(4)
NAME
glxiic - Geode LX CS5536 I2C controller driver
SYNOPSIS
To compile this driver into the kernel, place the following lines in your
kernel configuration file:
device pci
device isa
device glxiic
device iicbus
Alternatively, to load the driver as a module at boot time, place the
following line in loader.conf(5):
glxiic_load="YES"
DESCRIPTION
The glxiic driver supports the System Management Bus controller of the
Geode LX series CS5536 Companion Device. The Geode LX is a member of the
AMD Geode family of integrated x86 system chips.
Although AMD refers to this device as a System Management Bus (SMBus)
controller, it is really an I2C controller (it lacks SMBus ALERT# and
Alert Response support).
The glxiic driver supports both I2C master and slave mode.
SYSCTL VARIABLE
The glxiic driver supports the following variable as both sysctl(8) and
loader(8) tunable:
dev.glxiic.0.timeout
This variable controls the I2C bus timeout in milliseconds. The
default timeout is 35 milliseconds. A value of zero disables the
timeout.
CAVEAT
The glxiic driver uses the interrupt line number configured by the board
firmware by default. If no interrupt line number has been configured by
the board firmware (or to override the interrupt line number configured
by board firmware), place the following line in device.hints(5):
hint.glxiic.0.irq="10"
The interrupt line number must be between 1 and 15.
SEE ALSO
iicbus(4), device.hints(5), loader.conf(5), loader(8), sysctl(8)
HISTORY
The glxiic device driver and manual page first appeared in FreeBSD 9.0.
AUTHORS
The glxiic device driver and manual page were written by Henrik Brix
Andersen <brix@FreeBSD.org>.