On Tue, Oct 4, 2011 at 8:45 AM, Jean Delvare <jdelvare@xxxxxxx> wrote:
> 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>
Reviewed-by: 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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