If bus testing fails due to the bus being seen as busy, it might be
helpful for developers to know which line is unexpectedly low.
Signed-off-by: Jean Delvare <jdelvare@xxxxxxx>
Cc: Alex Deucher <alexdeucher@xxxxxxxxx>
---
drivers/i2c/algos/i2c-algo-bit.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- linux-3.0.orig/drivers/i2c/algos/i2c-algo-bit.c 2011-10-03 18:50:34.000000000 +0200
+++ linux-3.0/drivers/i2c/algos/i2c-algo-bit.c 2011-10-03 18:55:14.000000000 +0200
@@ -250,7 +250,9 @@ static int test_bus(struct i2c_adapter *
sda = getsda(adap);
scl = (adap->getscl == NULL) ? 1 : getscl(adap);
if (!scl || !sda) {
- printk(KERN_WARNING "%s: bus seems to be busy\n", name);
+ printk(KERN_WARNING
+ "%s: bus seems to be busy (scl=%d, sda=%d)\n",
+ name, scl, sda);
goto bailout;
}
--
Jean Delvare
Suse L3
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