On Thu, Jan 26, 2017 at 02:09:42PM -0600, Pierre-Louis Bossart wrote:
> Optional gpio handling should not cause an error status
> and prevent probing.
> Remove error return and move error message to dev_info

> @@ -3660,8 +3660,7 @@ static int rt5645_i2c_probe(struct i2c_client *i2c,
>  						       GPIOD_IN);
>  
>  	if (IS_ERR(rt5645->gpiod_hp_det)) {
> -		dev_err(&i2c->dev, "failed to initialize gpiod\n");
> -		return PTR_ERR(rt5645->gpiod_hp_det);
> +		dev_info(&i2c->dev, "failed to initialize gpiod\n");
>  	}

I'd expect this to depend on what the error is - the normal pattern is
to check for whatever the error code for "this doesn't exist" is and
ignore that while treating other things (especially -EPROBE_DEFER but
also other things) as errors.