diff options
| author | Jean Delvare <khali@linux-fr.org> | 2008-01-27 18:14:50 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@hyperion.delvare> | 2008-01-27 18:14:50 +0100 |
| commit | a0921b6c07dfbb59ac2d497e96438adaf4940f16 (patch) | |
| tree | 46394853267af027c3520a1e8f94aa73df1cc4f5 /drivers | |
| parent | 369f6f4aec5315012ff5d951e0179f860c35c181 (diff) | |
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: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index c31699d8df3..0b1b1ae5e22 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -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; |