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, 3 insertions, 0 deletions

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++) {