When syncing the cache, if the driver has given us a writable_register() callback, use it to not sync any non-writable registers.
Signed-off-by: Dimitris Papastamos dp@opensource.wolfsonmicro.com --- sound/soc/soc-cache.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index 657889d..0ec8e13 100644 --- a/sound/soc/soc-cache.c +++ b/sound/soc/soc-cache.c @@ -889,6 +889,9 @@ static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec) rbnode = rb_entry(node, struct snd_soc_rbtree_node, node); if (rbnode->value == rbnode->defval) continue; + if (codec->writable_register && + !codec->writable_register(codec, rbnode->reg)) + continue; ret = snd_soc_cache_read(codec, rbnode->reg, &val); if (ret) return ret; @@ -1149,6 +1152,8 @@ static int snd_soc_lzo_cache_sync(struct snd_soc_codec *codec)
lzo_blocks = codec->reg_cache; for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { + if (codec->writable_register && !codec->writable_register(codec, i)) + continue; ret = snd_soc_cache_read(codec, i, &val); if (ret) return ret; @@ -1407,6 +1412,8 @@ static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
codec_drv = codec->driver; for (i = 0; i < codec_drv->reg_cache_size; ++i) { + if (codec->writable_register && !codec->writable_register(codec, i)) + continue; ret = snd_soc_cache_read(codec, i, &val); if (ret) return ret;