Hi,
while writing a driver for a cardbus card which is supposed to use the
bit-banging algorithm I noticed that communication with the I2C slave
(Philips TDA10046) would fail without this patch. It forces SDA to high
for every bit in i2c_inb() instead of once per byte. Can this patch go
into the mainline kernel or will this break other drivers? I am using
Kernel version 2.6.10.
Signed-off-by: Andreas Oberritter <obi at saftware.de>
--- linux-2.6/drivers/i2c/algos/i2c-algo-bit.c.orig 2005-02-27 04:39:33.663444536 +0100
+++ linux-2.6/drivers/i2c/algos/i2c-algo-bit.c 2005-02-27 04:39:54.978204200 +0100
@@ -197,8 +197,8 @@ static int i2c_inb(struct i2c_adapter *i
struct i2c_algo_bit_data *adap = i2c_adap->algo_data;
/* assert: scl is low */
- sdahi(adap);
for (i=0;i<8;i++) {
+ sdahi(adap);
if (sclhi(adap)<0) { /* timeout */
DEB2(printk(KERN_DEBUG " i2c_inb: timeout at bit #%d\n", 7-i));
return -ETIMEDOUT;
