linux_dsm_epyc7002/Documentation/i2c/busses/i2c-via.rst
Mauro Carvalho Chehab ccf988b66d docs: i2c: convert to ReST and add to driver-api bookset
Convert each file at I2C subsystem, renaming them to .rst and
adding to the driver-api book.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-07-31 13:25:27 -06:00

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=====================
Kernel driver i2c-via
=====================
Supported adapters:
* VIA Technologies, InC. VT82C586B
Datasheet: Publicly available at the VIA website
Author: Kyösti Mälkki <kmalkki@cc.hut.fi>
Description
-----------
i2c-via is an i2c bus driver for motherboards with VIA chipset.
The following VIA pci chipsets are supported:
- MVP3, VP3, VP2/97, VPX/97
- others with South bridge VT82C586B
Your ``lspci`` listing must show this ::
Bridge: VIA Technologies, Inc. VT82C586B ACPI (rev 10)
Problems?
---------
Q:
You have VT82C586B on the motherboard, but not in the listing.
A:
Go to your BIOS setup, section PCI devices or similar.
Turn USB support on, and try again.
Q:
No error messages, but still i2c doesn't seem to work.
A:
This can happen. This driver uses the pins VIA recommends in their
datasheets, but there are several ways the motherboard manufacturer
can actually wire the lines.