diff --git a/include/sound/soc.h b/include/sound/soc.h
index d609232..b8acf99 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -276,6 +276,10 @@
 			unsigned int reg, unsigned int value);
 int snd_soc_cache_read(struct snd_soc_codec *codec,
 		       unsigned int reg, unsigned int *value);
+int snd_soc_default_volatile_register(struct snd_soc_codec *codec,
+				      unsigned int reg);
+int snd_soc_default_readable_register(struct snd_soc_codec *codec,
+				      unsigned int reg);
 
 /* Utility functions to get clock rates from various things */
 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
@@ -367,6 +371,22 @@
 	struct snd_ctl_elem_value *ucontrol);
 
 /**
+ * struct snd_soc_reg_access - Describes whether a given register is
+ * readable, writable or volatile.
+ *
+ * @reg: the register number
+ * @read: whether this register is readable
+ * @write: whether this register is writable
+ * @vol: whether this register is volatile
+ */
+struct snd_soc_reg_access {
+	u16 reg;
+	u16 read;
+	u16 write;
+	u16 vol;
+};
+
+/**
  * struct snd_soc_jack_pin - Describes a pin to update based on jack detection
  *
  * @pin:    name of the pin to update
@@ -515,6 +535,8 @@
 	short reg_cache_step;
 	short reg_word_size;
 	const void *reg_cache_default;
+	short reg_access_size;
+	const struct snd_soc_reg_access *reg_access_default;
 	enum snd_soc_compress_type compress_type;
 
 	/* codec bias level */