Hi Alexandru,
On Wednesday 01 October 2014 at 10:40:41, Alexandru M Stan wrote:
> i2cdetect -q was broken (everything was a false positive, and no transfers
> were actually being sent over i2c). The way it works is by sending a 0
> length write request and checking for NACK. This patch fixes the 0 length
> writes and actually sends them.
>
> Reported-by: Doug Anderson <dianders@xxxxxxxxxxxx>
> Signed-off-by: Alexandru M Stan <amstan@xxxxxxxxxxxx>
> ---
> drivers/i2c/busses/i2c-rk3x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c
> index b41d979..f486d0e 100644
> --- a/drivers/i2c/busses/i2c-rk3x.c
> +++ b/drivers/i2c/busses/i2c-rk3x.c
> @@ -238,7 +238,7 @@ static void rk3x_i2c_fill_transmit_buf(struct rk3x_i2c
> *i2c) for (i = 0; i < 8; ++i) {
> val = 0;
> for (j = 0; j < 4; ++j) {
> - if (i2c->processed == i2c->msg->len)
> + if ((i2c->processed == i2c->msg->len) && (cnt != 0))
> break;
>
> if (i2c->processed == 0 && cnt == 0)
Yes, looks correct and makes i2cdetect work for me on Radxa Rock.
Reviewed-By: Max Schwarz <max.schwarz@xxxxxxxxx>
Tested-By: Max Schwarz <max.schwarz@xxxxxxxxx>
Cheers,
Max
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