Attachment 304537 Details for Bug 182687 – Untested patch

[patch] Untested patch

linux-i2c-piix4-inc-delay-after-starting-transaction.patch (text/plain), 1.21 KB, created by David Milburn on 2008-05-05 16:43:57 UTC

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Creator: David Milburn

Created: 2008-05-05 16:43:57 UTC

Size: 1.21 KB

patch

obsolete

>diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
>index 9bbe96c..7dab69b 100644
>--- a/drivers/i2c/busses/i2c-piix4.c
>+++ b/drivers/i2c/busses/i2c-piix4.c
>@@ -105,6 +105,7 @@ MODULE_PARM_DESC(force_addr,
> static int piix4_transaction(void);
> 
> static unsigned short piix4_smba;
>+static unsigned short srvrworks_csb5_delay;
> static struct pci_driver piix4_driver;
> static struct i2c_adapter piix4_adapter;
> 
>@@ -123,6 +124,10 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
> 
> 	dev_info(&PIIX4_dev->dev, "Found %s device\n", pci_name(PIIX4_dev));
> 
>+	if ((PIIX4_dev->vendor == PCI_VENDOR_ID_SERVERWORKS) &&
>+	    (PIIX4_dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5))
>+		srvrworks_csb5_delay = 1;
>+
> 	/* Don't access SMBus on IBM systems which get corrupted eeproms */
> 	if (dmi_check_system(piix4_dmi_table) &&
> 			PIIX4_dev->vendor == PCI_VENDOR_ID_INTEL) {
>@@ -230,6 +235,10 @@ static int piix4_transaction(void)
> 	/* start the transaction by setting bit 6 */
> 	outb_p(inb(SMBHSTCNT) | 0x040, SMBHSTCNT);
> 
>+	/* extra delay for SERVERWORKS_CSB5 */
>+	if (srvrworks_csb5_delay)
>+		msleep(2);
>+
> 	/* We will always wait for a fraction of a second! (See PIIX4 docs errata) */
> 	do {
> 		msleep(1);

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Attachments on bug 182687: 303535 | 303775 | 304504 | 304537 | 304564 | 304646