#define AK4671_FORMATS SNDRV_PCM_FMTBIT_S16_LE
-static struct snd_soc_dai_ops ak4671_dai_ops = {
+static const struct snd_soc_dai_ops ak4671_dai_ops = {
.hw_params = ak4671_hw_params,
.set_sysclk = ak4671_set_dai_sysclk,
.set_fmt = ak4671_set_dai_fmt,