ASoC: Add default snd_soc_default_writable_register() callback

By using struct snd_soc_reg_access for the read/write/vol attributes
of the registers, we provide callbacks that automatically determine whether
a given register is readable/writable or volatile.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 4 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;