Kernel driver i2c-nforce2

Supported adapters:
  • nForce2 MCP 10de:0064

  • nForce2 Ultra 400 MCP 10de:0084

  • nForce3 Pro150 MCP 10de:00D4

  • nForce3 250Gb MCP 10de:00E4

  • nForce4 MCP 10de:0052

  • nForce4 MCP-04 10de:0034

  • nForce MCP51 10de:0264

  • nForce MCP55 10de:0368

  • nForce MCP61 10de:03EB

  • nForce MCP65 10de:0446

  • nForce MCP67 10de:0542

  • nForce MCP73 10de:07D8

  • nForce MCP78S 10de:0752

  • nForce MCP79 10de:0AA2


not publicly available, but seems to be similar to the AMD-8111 SMBus 2.0 adapter.



i2c-nforce2 is a driver for the SMBuses included in the nVidia nForce2 MCP.

If your lspci -v listing shows something like the following:

00:01.1 SMBus: nVidia Corporation: Unknown device 0064 (rev a2)
        Subsystem: Asustek Computer, Inc.: Unknown device 0c11
        Flags: 66Mhz, fast devsel, IRQ 5
        I/O ports at c000 [size=32]
        Capabilities: <available only to root>

then this driver should support the SMBuses of your motherboard.


The SMBus adapter in the nForce2 chipset seems to be very similar to the SMBus 2.0 adapter in the AMD-8111 south bridge. However, I could only get the driver to work with direct I/O access, which is different to the EC interface of the AMD-8111. Tested on Asus A7N8X. The ACPI DSDT table of the Asus A7N8X lists two SMBuses, both of which are supported by this driver.