diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index a51acefa785f..94e8185c4795 100644
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -282,9 +282,9 @@ static inline bool cs35l56_is_otp_register(unsigned int reg)
 	return (reg >> 16) == 3;
 }
 
-extern struct regmap_config cs35l56_regmap_i2c;
-extern struct regmap_config cs35l56_regmap_spi;
-extern struct regmap_config cs35l56_regmap_sdw;
+extern const struct regmap_config cs35l56_regmap_i2c;
+extern const struct regmap_config cs35l56_regmap_spi;
+extern const struct regmap_config cs35l56_regmap_sdw;
 
 extern const struct cirrus_amp_cal_controls cs35l56_calibration_controls;
 
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index 3744a7c8cea5..e45e9ae01bc6 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -916,7 +916,7 @@ const unsigned int cs35l56_tx_input_values[] = {
 };
 EXPORT_SYMBOL_NS_GPL(cs35l56_tx_input_values, SND_SOC_CS35L56_SHARED);
 
-struct regmap_config cs35l56_regmap_i2c = {
+const struct regmap_config cs35l56_regmap_i2c = {
 	.reg_bits = 32,
 	.val_bits = 32,
 	.reg_stride = 4,
@@ -932,7 +932,7 @@ struct regmap_config cs35l56_regmap_i2c = {
 };
 EXPORT_SYMBOL_NS_GPL(cs35l56_regmap_i2c, SND_SOC_CS35L56_SHARED);
 
-struct regmap_config cs35l56_regmap_spi = {
+const struct regmap_config cs35l56_regmap_spi = {
 	.reg_bits = 32,
 	.val_bits = 32,
 	.pad_bits = 16,
@@ -949,7 +949,7 @@ struct regmap_config cs35l56_regmap_spi = {
 };
 EXPORT_SYMBOL_NS_GPL(cs35l56_regmap_spi, SND_SOC_CS35L56_SHARED);
 
-struct regmap_config cs35l56_regmap_sdw = {
+const struct regmap_config cs35l56_regmap_sdw = {
 	.reg_bits = 32,
 	.val_bits = 32,
 	.reg_stride = 4,