1 files changed, 27 insertions, 0 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5d3954774ade..275e41133468 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -238,6 +238,7 @@ struct soc_enum;
 struct snd_soc_ac97_ops;
 struct snd_soc_jack;
 struct snd_soc_jack_pin;
+struct snd_soc_cache_ops;
 #include <sound/soc-dapm.h>
 
 #ifdef CONFIG_GPIOLIB
@@ -254,6 +255,10 @@ enum snd_soc_control_type {
         SND_SOC_SPI,
 };
 
+enum snd_soc_compress_type {
+        SND_SOC_NO_COMPRESSION
+};
+
 int snd_soc_register_platform(struct device *dev,
                 struct snd_soc_platform_driver *platform_drv);
 void snd_soc_unregister_platform(struct device *dev);
@@ -265,6 +270,13 @@ int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg);
 int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
                                int addr_bits, int data_bits,
                                enum snd_soc_control_type control);
+int snd_soc_cache_sync(struct snd_soc_codec *codec);
+int snd_soc_cache_init(struct snd_soc_codec *codec);
+int snd_soc_cache_exit(struct snd_soc_codec *codec);
+int snd_soc_cache_write(struct snd_soc_codec *codec,
+                        unsigned int reg, unsigned int value);
+int snd_soc_cache_read(struct snd_soc_codec *codec,
+                       unsigned int reg, unsigned int *value);
 
 /* Utility functions to get clock rates from various things */
 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
@@ -421,6 +433,18 @@ struct snd_soc_ops {
         int (*trigger)(struct snd_pcm_substream *, int);
 };
 
+/* SoC cache ops */
+struct snd_soc_cache_ops {
+        enum snd_soc_compress_type id;
+        int (*init)(struct snd_soc_codec *codec);
+        int (*exit)(struct snd_soc_codec *codec);
+        int (*read)(struct snd_soc_codec *codec, unsigned int reg,
+                unsigned int *value);
+        int (*write)(struct snd_soc_codec *codec, unsigned int reg,
+                unsigned int value);
+        int (*sync)(struct snd_soc_codec *codec);
+};
+
 /* SoC Audio Codec device */
 struct snd_soc_codec {
         const char *name;
@@ -450,6 +474,8 @@ struct snd_soc_codec {
         hw_write_t hw_write;
         unsigned int (*hw_read)(struct snd_soc_codec *, unsigned int);
         void *reg_cache;
+        const struct snd_soc_cache_ops *cache_ops;
+        struct mutex cache_rw_mutex;
 
         /* dapm */
         struct snd_soc_dapm_context dapm;
@@ -482,6 +508,7 @@ struct snd_soc_codec_driver {
         short reg_cache_step;
         short reg_word_size;
         const void *reg_cache_default;
+        enum snd_soc_compress_type compress_type;
 
         /* codec bias level */
         int (*set_bias_level)(struct snd_soc_codec *,