diff --git a/sound/soc/codecs/ak4642.c b/sound/soc/codecs/ak4642.c
index 1ee8506c06c75705ab643dc4f8ef6b04b9b55e64..4d8b9e49e8d6dcb47f7c6516561fd98d847bfdf9 100644
--- a/sound/soc/codecs/ak4642.c
+++ b/sound/soc/codecs/ak4642.c
@@ -560,6 +560,7 @@ static const struct regmap_config ak4642_regmap = {
 	.max_register		= FIL1_3,
 	.reg_defaults		= ak4642_reg,
 	.num_reg_defaults	= NUM_AK4642_REG_DEFAULTS,
+	.cache_type		= REGCACHE_RBTREE,
 };
 
 static const struct regmap_config ak4643_regmap = {
@@ -568,6 +569,7 @@ static const struct regmap_config ak4643_regmap = {
 	.max_register		= SPK_MS,
 	.reg_defaults		= ak4643_reg,
 	.num_reg_defaults	= ARRAY_SIZE(ak4643_reg),
+	.cache_type		= REGCACHE_RBTREE,
 };
 
 static const struct regmap_config ak4648_regmap = {
@@ -576,6 +578,7 @@ static const struct regmap_config ak4648_regmap = {
 	.max_register		= EQ_FBEQE,
 	.reg_defaults		= ak4648_reg,
 	.num_reg_defaults	= ARRAY_SIZE(ak4648_reg),
+	.cache_type		= REGCACHE_RBTREE,
 };
 
 static const struct ak4642_drvdata ak4642_drvdata = {