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-rw-r--r--include/sound/soc.h4
-rw-r--r--sound/soc/soc-cache.c14
-rw-r--r--sound/soc/soc-core.c3
3 files changed, 21 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4a11795aaee3..e20835753c6b 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -292,6 +292,8 @@ 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);
+int snd_soc_default_writable_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);
@@ -523,6 +525,7 @@ struct snd_soc_codec {
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);
+ int (*writable_register)(struct snd_soc_codec *, unsigned int);
/* runtime */
struct snd_ac97 *ac97; /* for ad-hoc ac97 devices */
@@ -589,6 +592,7 @@ struct snd_soc_codec_driver {
size_t, unsigned int);
int (*volatile_register)(struct snd_soc_codec *, unsigned int);
int (*readable_register)(struct snd_soc_codec *, unsigned int);
+ int (*writable_register)(struct snd_soc_codec *, unsigned int);
short reg_cache_size;
short reg_cache_step;
short reg_word_size;
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 258c3b2098b5..1210a6f70a90 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -1449,3 +1449,17 @@ int snd_soc_default_readable_register(struct snd_soc_codec *codec,
return codec->driver->reg_access_default[index].read;
}
EXPORT_SYMBOL_GPL(snd_soc_default_readable_register);
+
+int snd_soc_default_writable_register(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ int index;
+
+ if (reg >= codec->driver->reg_cache_size)
+ return 1;
+ index = snd_soc_get_reg_access_index(codec, reg);
+ if (index < 0)
+ return 0;
+ return codec->driver->reg_access_default[index].write;
+}
+EXPORT_SYMBOL_GPL(snd_soc_default_writable_register);
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 636328e868e8..074a0c6e99f4 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3673,6 +3673,7 @@ int snd_soc_register_codec(struct device *dev,
codec->read = codec_drv->read;
codec->volatile_register = codec_drv->volatile_register;
codec->readable_register = codec_drv->readable_register;
+ codec->writable_register = codec_drv->writable_register;
codec->dapm.bias_level = SND_SOC_BIAS_OFF;
codec->dapm.dev = dev;
codec->dapm.codec = codec;
@@ -3707,6 +3708,8 @@ int snd_soc_register_codec(struct device *dev,
codec->volatile_register = snd_soc_default_volatile_register;
if (!codec->readable_register)
codec->readable_register = snd_soc_default_readable_register;
+ if (!codec->writable_register)
+ codec->writable_register = snd_soc_default_writable_register;
}
for (i = 0; i < num_dai; i++) {