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i2c: piix4: Pre-shift the port number 

Shift the port number at initialization time, so that it is ready to
use at run time. That way we don't have to do it again for every SMBus
transaction.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Jean Delvare 2016-01-29 10:46:37 +01:00 committed by Wolfram Sang
parent 62194e869a
commit 33f5ccc343
1 changed files with 5 additions and 5 deletions
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10
drivers/i2c/busses/i2c-piix4.c
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@ -159,7 +159,7 @@ struct i2c_piix4_adapdata {
/* SB800 */
bool sb800_main;
u8 port;
u8 port; /* Port number, shifted */
};
static int piix4_setup(struct pci_dev *PIIX4_dev,
@ -595,8 +595,8 @@ static s32 piix4_access_sb800(struct i2c_adapter *adap, u16 addr,
smba_en_lo = inb_p(SB800_PIIX4_SMB_IDX + 1);
port = adapdata->port;
if ((smba_en_lo & SB800_PIIX4_PORT_IDX_MASK) != (port << 1))
outb_p((smba_en_lo & ~SB800_PIIX4_PORT_IDX_MASK) | (port << 1),
if ((smba_en_lo & SB800_PIIX4_PORT_IDX_MASK) != port)
outb_p((smba_en_lo & ~SB800_PIIX4_PORT_IDX_MASK) | port,
SB800_PIIX4_SMB_IDX + 1);
retval = piix4_access(adap, addr, flags, read_write,
@ -682,7 +682,7 @@ static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba,
adapdata->smba = smba;
adapdata->sb800_main = sb800_main;
adapdata->port = port;
adapdata->port = port << 1;
/* set up the sysfs linkage to our parent device */
adap->dev.parent = &dev->dev;
@ -818,7 +818,7 @@ static void piix4_adap_remove(struct i2c_adapter *adap)
if (adapdata->smba) {
i2c_del_adapter(adap);
if (adapdata->port == 0) {
if (adapdata->port == (0 << 1)) {
release_region(adapdata->smba, SMBIOSIZE);
if (adapdata->sb800_main)
release_region(SB800_PIIX4_SMB_IDX, 2);