xref: /linux/Documentation/i2c/busses/i2c-nforce2.rst (revision 976e3645923bdd2fe7893aae33fd7a21098bfb28)
1=========================
2Kernel driver i2c-nforce2
3=========================
4
5Supported adapters:
6  * nForce2 MCP                10de:0064
7  * nForce2 Ultra 400 MCP      10de:0084
8  * nForce3 Pro150 MCP         10de:00D4
9  * nForce3 250Gb MCP          10de:00E4
10  * nForce4 MCP                10de:0052
11  * nForce4 MCP-04             10de:0034
12  * nForce MCP51               10de:0264
13  * nForce MCP55               10de:0368
14  * nForce MCP61               10de:03EB
15  * nForce MCP65               10de:0446
16  * nForce MCP67               10de:0542
17  * nForce MCP73               10de:07D8
18  * nForce MCP78S              10de:0752
19  * nForce MCP79               10de:0AA2
20
21Datasheet:
22           not publicly available, but seems to be similar to the
23           AMD-8111 SMBus 2.0 adapter.
24
25Authors:
26	- Hans-Frieder Vogt <hfvogt@gmx.net>,
27	- Thomas Leibold <thomas@plx.com>,
28        - Patrick Dreker <patrick@dreker.de>
29
30Description
31-----------
32
33i2c-nforce2 is a driver for the SMBuses included in the nVidia nForce2 MCP.
34
35If your ``lspci -v`` listing shows something like the following::
36
37  00:01.1 SMBus: nVidia Corporation: Unknown device 0064 (rev a2)
38          Subsystem: Asustek Computer, Inc.: Unknown device 0c11
39          Flags: 66Mhz, fast devsel, IRQ 5
40          I/O ports at c000 [size=32]
41          Capabilities: <available only to root>
42
43then this driver should support the SMBuses of your motherboard.
44
45
46Notes
47-----
48
49The SMBus adapter in the nForce2 chipset seems to be very similar to the
50SMBus 2.0 adapter in the AMD-8111 south bridge. However, I could only get
51the driver to work with direct I/O access, which is different to the EC
52interface of the AMD-8111. Tested on Asus A7N8X. The ACPI DSDT table of the
53Asus A7N8X lists two SMBuses, both of which are supported by this driver.
54