1 .\" $NetBSD: ichlpcib.4,v 1.9 2009/09/27 17:55:32 jakllsch Exp $
3 .\" Copyright (c) 2004 The NetBSD Foundation, Inc.
4 .\" All rights reserved.
6 .\" This code is derived from software contributed to The NetBSD Foundation
7 .\" by Minoura Makoto and Matthew R. Green.
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
12 .\" 1. Redistributions of source code must retain the above copyright
13 .\" notice, this list of conditions and the following disclaimer.
14 .\" 2. Redistributions in binary form must reproduce the above copyright
15 .\" notice, this list of conditions and the following disclaimer in the
16 .\" documentation and/or other materials provided with the distribution.
18 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 .\" POSSIBILITY OF SUCH DAMAGE.
30 .Dd September 27, 2009
35 .Nd Intel ICH LPC Interface Bridge
37 .Cd "ichlpcib* at pci? dev ? function ?"
38 .Cd "hpet0 at ichlpcib?"
39 .Cd "isa0 at ichlpcib?"
40 .Cd "gpio* at ichlpcib?"
44 driver supports the Intel ICH LPC Interface Bridges on compatible
46 Supported functions include:
50 The watchdog timer may be configured for a 2 seconds (on ICH6 or newer)
51 and 4 seconds (on ICH5 or older) min period and for a 39 seconds
52 (on ICH5 or older) or 613 seconds max period (on ICH6 or newer).
54 Power Management timer.
55 A 24-bit timer available to be used by the timecounters framework.
58 In some systems the SpeedStep function is also available, and can be
59 used to switch between high and low frequency (to reduce power consumption)
61 .Li machdep.speedstep_state
64 A value of 0 will use the low frequency (low power) and a 1 will
65 enable the high frequency (full power).
67 General Purpose Input/Output.
68 The ICH provides up to 64 I/O pins which can be accessed through the
79 driver first appeared in
87 .An Matthew R. Green .