On Fri, Aug 18, 2017 at 02:10:30PM -0400, Alex Deucher wrote:

> +++ b/sound/soc/amd/Kconfig
> @@ -2,3 +2,10 @@ config SND_SOC_AMD_ACP
>  	tristate "AMD Audio Coprocessor support"
>  	help
>  	 This option enables ACP DMA support on AMD platform.
> +config SND_SOC_AMD_CZ_RT5645_MACH
> +	tristate "AMD CZ support for RT5645"

Missing blank line between the stanzas.

> +	select SND_SOC_RT5645
> +	select SND_SOC_AMD_ACP
> +	depends on I2C_DESIGNWARE_PLATFORM

No system dependencies of any kind?  Looking at this I'd expect at least
CONFIG_ACPI || COMPILE_TEST.  It's also unclear to me how the DesignWare
device is going to be instantiated here or if that should be a direct
depenency at all here.

> +	ret = snd_soc_register_card(card);

devm_snd_soc_register_card() and then you don't need the remove
function.

> +static const struct acpi_device_id cz_audio_acpi_match[] = {
> +	{ "AMDI1002", 0 },
> +	{},
> +};
> +

Missing MODULE_DEVICE_TABLE().