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Commit a0921b6c authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
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i2c-i801: Clear special mode bits as needed 



Clear special mode bits (PEC, block buffer) at driver load time,
you never know in which state the device was left by its last user.

Also make sure that we reset the block buffer mode at the end of every
transaction, not only when PEC was used.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 369f6f4a

drivers/i2c/busses/i2c-i801.c

+6 −1
Original line number Diff line number Diff line
@@ -502,7 +502,7 @@ static s32 i801_access(struct i2c_adapter * adap, u16 addr, 
	/* Some BIOSes don't like it when PEC is enabled at reboot or resume

	   time, so we forcibly disable it after every transaction. Turn off

	   E32B for the same reason. */

	if (hwpec)

	if (hwpec || block)

		outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B),

		       SMBAUXCTL);
@@ -625,6 +625,11 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id 
	else

		dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n");



	/* Clear special mode bits */

	if (i801_features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER))

		outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B),

		       SMBAUXCTL);



	/* set up the sysfs linkage to our parent device */

	i801_adapter.dev.parent = &dev->dev;