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NVIIC(4) Device Drivers Manual NVIIC(4)

nviic
NVIDIA nForce2/3/4 SMBus controller

nviic* at pci?
iic* at nviic?

The nviic driver provides support for the NVIDIA nForce2/3/4 and MCP51/55/61/65/67/73/77/79/89 SMBus host interface to be used with the iic(4) framework.

iic(4), intro(4), pci(4)

The nviic driver first appeared in OpenBSD 3.9.

The nviic driver was written by David Gwynne <dlg@openbsd.org>.

The driver doesn't support I2C commands with a data buffer size of more than 2 bytes.
July 16, 2013 OpenBSD-5.7