ASoC: io: Retrieve val_bytes from the regmap API

Allow us to build infrastructure which needs to know the size of a value
without requiring regmap based drivers to supply this information to both
ASoC and regmap by asking regmap for the value.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/sound/soc/soc-io.c b/sound/soc/soc-io.c
index 39ba5070ff92..4d8dc6a27d4d 100644
--- a/sound/soc/soc-io.c
+++ b/sound/soc/soc-io.c
@@ -114,6 +114,7 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
                                enum snd_soc_control_type control)
 {
         struct regmap_config config;
+        int ret;
 
         memset(&config, 0, sizeof(config));
         codec->write = hw_write;
@@ -141,6 +142,11 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
         case SND_SOC_REGMAP:
                 /* Device has made its own regmap arrangements */
                 codec->using_regmap = true;
+
+                ret = regmap_get_val_bytes(codec->control_data);
+                /* Errors are legitimate for non-integer byte multiples */
+                if (ret > 0)
+                        codec->val_bytes = ret;
                 break;
 
         default: