linux-kernel - [PATCH] I2C: Add support for new AMD SMBus devices

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Message-ID: <20090720073112.GA18219@crane-desktop>
Date:	Mon, 20 Jul 2009 15:31:12 +0800
From:	Crane Cai <crane.cai@....com>
To:	khali@...ux-fr.org
CC:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] I2C: Add support for new AMD SMBus devices

Use driver to detect SMBus devices with Vendor ID AMD and class code is SMBus.

Signed-off-by: Crane Cai <crane.cai@....com>
---
 drivers/i2c/busses/i2c-piix4.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 0249a7d..034f388 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -479,6 +479,10 @@ static struct pci_device_id piix4_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS) },
+	/* AMD Generic, PCI class code and Vendor ID for SMBus */
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_ANY_ID),
+	  .class = PCI_CLASS_SERIAL_SMBUS << 8,
+	  .class_mask = 0xffffff },
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
 		     PCI_DEVICE_ID_SERVERWORKS_OSB4) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
@@ -499,9 +503,10 @@ static int __devinit piix4_probe(struct pci_dev *dev,
 {
 	int retval;
 
-	if ((dev->vendor == PCI_VENDOR_ID_ATI) &&
+	if (((dev->vendor == PCI_VENDOR_ID_ATI) &&
 	    (dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS) &&
-	    (dev->revision >= 0x40))
+	    (dev->revision >= 0x40)) ||
+	    dev->vendor == PCI_VENDOR_ID_AMD)
 		/* base address location etc changed in SB800 */
 		retval = piix4_setup_sb800(dev, id);
 	else
-- 
1.6.0.4

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