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Commit ab6a6ed2 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
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i2c-viapro: Add support for the VIA CX700 south bridge 



We do not have any documentation for the CX700, but it was reported
to work fine. Thanks to Claas Langbehn for testing.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 9ace555d

Documentation/i2c/busses/i2c-viapro

+7 −0
Original line number Diff line number Diff line
@@ -13,6 +13,9 @@ Supported adapters: 
  * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8251

    Datasheet: available on request and under NDA from VIA



  * VIA Technologies, Inc. CX700

    Datasheet: available on request and under NDA from VIA



Authors:

	Kysti Mlkki <kmalkki@cc.hut.fi>,

	Mark D. Studebaker <mdsxyz123@yahoo.com>,
@@ -44,6 +47,7 @@ Your lspci -n listing must show one of these : 
 device 1106:3227   (VT8237R)

 device 1106:3337   (VT8237A)

 device 1106:3287   (VT8251)

 device 1106:8324   (CX700)



If none of these show up, you should look in the BIOS for settings like

enable ACPI / SMBus or even USB.
@@ -51,3 +55,6 @@ 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 additionally appears to support SMBus PEC, although this driver

doesn't implement it yet.

drivers/i2c/busses/Kconfig

+3 −2
Original line number Diff line number Diff line
@@ -500,11 +500,11 @@ config I2C_VIA 
	  will be called i2c-via.



config I2C_VIAPRO

	tristate "VIA 82C596/82C686/82xx"

	tristate "VIA VT82C596/82C686/82xx and CX700"

	depends on I2C && PCI

	help

	  If you say yes to this option, support will be included for the VIA

	  82C596/82C686/82xx I2C interfaces.  Specifically, the following

	  VT82C596 and later SMBus interface.  Specifically, the following

	  chipsets are supported:

	    VT82C596A/B

	    VT82C686A/B
@@ -513,6 +513,7 @@ config I2C_VIAPRO 
	    VT8235

	    VT8237R/A

	    VT8251

	    CX700



	  This driver can also be built as a module.  If so, the module

	  will be called i2c-viapro.

drivers/i2c/busses/i2c-viapro.c

+5 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
    Copyright (c) 1998 - 2002  Frodo Looijaard <frodol@dds.nl>,

    Philip Edelbrock <phil@netroedge.com>, Kysti Mlkki <kmalkki@cc.hut.fi>,

    Mark D. Studebaker <mdsxyz123@yahoo.com>

    Copyright (C) 2005  Jean Delvare <khali@linux-fr.org>

    Copyright (C) 2005 - 2007  Jean Delvare <khali@linux-fr.org>



    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by
@@ -36,6 +36,7 @@ 
   VT8237R            0x3227             yes

   VT8237A            0x3337             yes

   VT8251             0x3287             yes

   CX700              0x8324             yes



   Note: we assume there can only be one device, with one SMBus interface.

*/
@@ -384,6 +385,7 @@ found: 
	dev_dbg(&pdev->dev, "VT596_smba = 0x%X\n", vt596_smba);



	switch (pdev->device) {

	case PCI_DEVICE_ID_VIA_CX700:

	case PCI_DEVICE_ID_VIA_8251:

	case PCI_DEVICE_ID_VIA_8237:

	case PCI_DEVICE_ID_VIA_8237A:
@@ -443,6 +445,8 @@ static struct pci_device_id vt596_ids[] = { 
	  .driver_data = SMBBA1 },

	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8251),

	  .driver_data = SMBBA3 },

	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700),

	  .driver_data = SMBBA3 },

	{ 0, }

};