On Thu, Feb 23, 2012 at 02:46:51PM +0900, Tomoya MORINAGA wrote:

>  	  This option enables support for the AC Link Controllers in ML7213 IOH SoC.
> +config SND_SOC_ML7213_MACHINE
> +	tristate "ML7213 IOH ASoC machine driver"
> +	select SND_SOC_ML7213_PLATFORM
> +	help
> +	  This is ASoC machine driver for ML7213 IOH

This needs to depend on the CODEC as well, how have you tested?

You're also missing a blank line between this and the previous stanza.

> +	default:
> +		pr_err("%s: Failed not support format\n", __func__);
> +		return -EINVAL;
> +		break;

return followed by break isn't entirely sensible.

> +static struct platform_device *ioh_snd_device;
> +
> +
> +static int __init ioh_i2s_init(void)
> +{
> +	int ret;
> +	ioh_snd_device = platform_device_alloc("soc-audio", -1);
> +	if (!ioh_snd_device)
> +		return -ENOMEM;

Use snd_soc_register_card() and a real device.