[alsa-devel] [PATCH 3/3] ASoC: sgtl5000: Defer probe in case of I2C error

Mark Brown broonie at kernel.org
Wed Jun 26 10:33:08 CEST 2013

On Tue, Jun 25, 2013 at 11:00:01AM -0300, Fabio Estevam wrote:
> In case of I2C error, let's defer the probe.
> On mx28, for example, the first read of the codec revision register fails 
> because there is no codec clock provided at this point. The codec clock will be 
> enabled later in the mxs-saif driver, so return -EPROBE_DEFER in case of I2C 
> read error, so that the codec driver can do another attempt at a later stage 
> when the codec clock is available.

This doesn't seem to match up with the code:

>  	ret = regmap_read(sgtl5000->regmap, SGTL5000_CHIP_ID, &reg);
> -	if (ret)
> +	if (ret) {
> +		ret = -EPROBE_DEFER; /* If I2C read failed, try again later */
>  		goto disable_clk;
> +	}

Looking at the label we jump to here it seems like the clock really
should be enabled at the point where the register read is attempted...
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20130626/aa9024db/attachment.sig>

More information about the Alsa-devel mailing list