struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);