[alsa-devel] [PATCH v5] ASoC: tlv320aic31xx: Add basic codec driver implementation

[Jyri Sarha]

On 03/13/2014 02:20 PM, Mark Brown wrote:
> On Tue, Mar 11, 2014 at 12:57:32PM +0200, Jyri Sarha wrote:
>> This commit adds a bare bones driver support for TLV320AIC31XX family
>> audio codecs. The driver adds basic stereo playback trough headphone
>> and speaker outputs and mono capture trough microphone inputs.
>
> Applied, thanks.  One thing it'd be good to fix:
>
>> +Optional properties:
>> +
>> +- gpio-reset - gpio pin number used for codec reset
>> +- ai31xx-micbias-vg - MicBias Voltage setting
>
> This is optional but...
>
>> +	of_property_read_u32(np, "ai31xx-micbias-vg", &value);
>> +	switch (value) {
>> +	case MICBIAS_2_0V:
>> +	case MICBIAS_2_5V:
>> +	case MICBIAS_AVDDV:
>> +		aic31xx->pdata.micbias_vg = value;
>> +		break;
>> +	default:
>> +		dev_err(aic31xx->dev,
>> +			"Bad ai31xx-micbias-vg value %d DT\n",
>> +			value);
>> +		aic31xx->pdata.micbias_vg = MICBIAS_2_0V;
>> +	}
>
> ...you'll get an error if it's missing (and an uninitialised memory
> read).
>

Actually you don't. The value-variable is initialized to MICBIAS_2_0V 
and if "ai31xx-micbias-vg" is not present of_property_read_u32 leaves 
the variable untouched, but I'll send a patch for fixing the unused 
variable working shortly.

Forget about the v6 version of the patch.

Thanks,
Jyri