diff options
| author | Jean Delvare <khali@linux-fr.org> | 2005-09-23 00:15:53 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-10-29 01:02:08 +0400 |
| commit | 50c1cc339ca72f7cb95d440d384346f4238dc494 (patch) | |
| tree | 061a3c28705b77386f9598bee2c154d688d6d4cd /drivers/i2c | |
| parent | aaf7f1477668f34dda65aba17e87c0bc2ebe84d1 (diff) | |
| download | linux-50c1cc339ca72f7cb95d440d384346f4238dc494.tar.xz | |
[PATCH] i2c-viapro: Refactor control outb
By slightly shifting the interface between vt596_access and
vt596_transaction, we can save two I/O accesses per SMBus transaction.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/i2c/busses/i2c-viapro.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-viapro.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c index 3be476cd4bc5..a89a21264d37 100644 --- a/drivers/i2c/busses/i2c-viapro.c +++ b/drivers/i2c/busses/i2c-viapro.c @@ -105,7 +105,7 @@ static struct i2c_adapter vt596_adapter; static unsigned int vt596_features; /* Return -1 on error, 0 on success */ -static int vt596_transaction(void) +static int vt596_transaction(u8 size) { int temp; int result = 0; @@ -131,7 +131,7 @@ static int vt596_transaction(void) } /* Start the transaction by setting bit 6 */ - outb_p(inb(SMBHSTCNT) | 0x40, SMBHSTCNT); + outb_p(0x40 | (size & 0x3C), SMBHSTCNT); /* We will always wait for a fraction of a second */ do { @@ -232,9 +232,8 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, } outb_p(((addr & 0x7f) << 1) | read_write, SMBHSTADD); - outb_p((size & 0x3C), SMBHSTCNT); - if (vt596_transaction()) /* Error in transaction */ + if (vt596_transaction(size)) /* Error in transaction */ return -1; if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK)) |