diff --git a/include/sound/soc.h b/include/sound/soc.h
index 97d1832..accb8a1 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -480,6 +480,8 @@
 	int num_dai;
 	enum snd_soc_compress_type compress_type;
 	size_t reg_size;	/* reg_cache_size * reg_word_size */
+	int (*volatile_register)(struct snd_soc_codec *, unsigned int);
+	int (*readable_register)(struct snd_soc_codec *, unsigned int);
 
 	/* runtime */
 	struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */