1 .\" Copyright (c) 2011 Henrik Brix Andersen <brix@FreeBSD.org>
2 .\" All rights reserved.
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31 .Nd Geode LX CS5536 I2C controller driver
33 To compile this driver into the kernel,
34 place the following lines in your
35 kernel configuration file:
36 .Bd -ragged -offset indent
43 Alternatively, to load the driver as a
44 module at boot time, place the following line in
46 .Bd -literal -offset indent
52 driver supports the System Management Bus controller of the Geode LX
53 series CS5536 Companion Device.
54 The Geode LX is a member of the AMD Geode family of integrated x86 system chips.
56 Although AMD refers to this device as a System Management Bus (SMBus)
57 controller, it is really an I2C controller (it lacks SMBus ALERT# and
58 Alert Response support).
62 driver supports both I2C master and slave mode.
66 driver supports the following variable as both
71 .Bl -tag -width indent
72 .It Va dev.glxiic.0.timeout
73 This variable controls the I2C bus timeout in milliseconds.
74 The default timeout is 35 milliseconds.
75 A value of zero disables the timeout.
80 driver uses the interrupt line number configured by the board firmware
82 If no interrupt line number has been configured by the board firmware
83 (or to override the interrupt line number configured by board firmware),
84 place the following line in
86 .Bd -ragged -offset indent
87 hint.glxiic.0.irq="10"
90 The interrupt line number must be between 1 and 15.
100 device driver and manual page first appeared in
106 device driver and manual page were written by
107 .An Henrik Brix Andersen Aq Mt brix@FreeBSD.org .