2 files changed, 107 insertions, 0 deletions
diff --git a/Documentation/i2c/busses/i2c-via b/Documentation/i2c/busses/i2c-via
new file mode 100644
index 000000000..343870661
--- /dev/null
+++ b/Documentation/i2c/busses/i2c-via
@@ -0,0 +1,34 @@
+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.
+
diff --git a/Documentation/i2c/busses/i2c-viapro b/Documentation/i2c/busses/i2c-viapro
new file mode 100644
index 000000000..ab64ce21c
--- /dev/null
+++ b/Documentation/i2c/busses/i2c-viapro
@@ -0,0 +1,73 @@
+Kernel driver i2c-viapro
+
+Supported adapters:
+  * VIA Technologies, Inc. VT82C596A/B
+    Datasheet: Sometimes available at the VIA website
+
+  * VIA Technologies, Inc. VT82C686A/B
+    Datasheet: Sometimes available at the VIA website
+
+  * VIA Technologies, Inc. VT8231, VT8233, VT8233A
+    Datasheet: available on request from VIA
+
+  * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251
+    Datasheet: available on request and under NDA from VIA
+
+  * VIA Technologies, Inc. CX700
+    Datasheet: available on request and under NDA from VIA
+
+  * VIA Technologies, Inc. VX800/VX820
+    Datasheet: available on http://linux.via.com.tw
+
+  * VIA Technologies, Inc. VX855/VX875
+    Datasheet: available on http://linux.via.com.tw
+
+  * VIA Technologies, Inc. VX900
+    Datasheet: available on http://linux.via.com.tw
+
+Authors:
+	Kyösti Mälkki <kmalkki@cc.hut.fi>,
+	Mark D. Studebaker <mdsxyz123@yahoo.com>,
+	Jean Delvare <jdelvare@suse.de>
+
+Module Parameters
+-----------------
+
+* force: int
+  Forcibly enable the SMBus controller. DANGEROUS!
+* force_addr: int
+  Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
+
+Description
+-----------
+
+i2c-viapro is a true SMBus host driver for motherboards with one of the
+supported VIA south bridges.
+
+Your lspci -n listing must show one of these :
+
+ device 1106:3050   (VT82C596A function 3)
+ device 1106:3051   (VT82C596B function 3)
+ device 1106:3057   (VT82C686 function 4)
+ device 1106:3074   (VT8233)
+ device 1106:3147   (VT8233A)
+ device 1106:8235   (VT8231 function 4)
+ device 1106:3177   (VT8235)
+ device 1106:3227   (VT8237R)
+ device 1106:3337   (VT8237A)
+ device 1106:3372   (VT8237S)
+ device 1106:3287   (VT8251)
+ device 1106:8324   (CX700)
+ device 1106:8353   (VX800/VX820)
+ device 1106:8409   (VX855/VX875)
+ device 1106:8410   (VX900)
+
+If none of these show up, you should look in the BIOS for settings like
+enable ACPI / SMBus or even USB.
+
+Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
+VT8231), this driver supports I2C block transactions. Such transactions
+are mainly useful to read from and write to EEPROMs.
+
+The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
+this driver doesn't implement it yet.