diff --git a/sound/soc/codecs/cs35l56-shared-test.c b/sound/soc/codecs/cs35l56-shared-test.c
index cfe7938065f9..8060a275d32b 100644
--- a/sound/soc/codecs/cs35l56-shared-test.c
+++ b/sound/soc/codecs/cs35l56-shared-test.c
@@ -29,6 +29,7 @@ struct cs35l56_shared_test_priv {
 	struct faux_device *gpio_dev;
 	struct cs35l56_shared_test_mock_gpio *gpio_priv;
 	struct regmap *registers;
+	unsigned int reg_offset;
 	struct cs35l56_base *cs35l56_base;
 	u8 applied_pad_pull_state[CS35L56_MAX_GPIO];
 };
@@ -194,6 +195,8 @@ static int cs35l56_shared_test_reg_read(void *context, unsigned int reg, unsigne
 {
 	struct cs35l56_shared_test_priv *priv = context;
 
+	reg -= priv->reg_offset;
+
 	switch (reg) {
 	case CS35L56_SYNC_GPIO1_CFG ... CS35L56_ASP2_DIO_GPIO13_CFG:
 	case CS35L56_GPIO1_CTRL1 ... CS35L56_GPIO13_CTRL1:
@@ -214,6 +217,8 @@ static int cs35l56_shared_test_reg_write(void *context, unsigned int reg, unsign
 {
 	struct cs35l56_shared_test_priv *priv = context;
 
+	reg -= priv->reg_offset;
+
 	switch (reg) {
 	case CS35L56_UPDATE_REGS:
 		return cs35l56_shared_test_updt_gpio_pres(priv, reg, val);
@@ -657,6 +662,7 @@ static int cs35l56_shared_test_case_base_init(struct kunit *test, u8 type, u8 re
 
 	test->priv = priv;
 	priv->test = test;
+	priv->reg_offset = regmap_config->reg_base;
 
 	/* Create dummy amp driver dev */
 	priv->amp_dev = faux_device_create("cs35l56_shared_test_drv", NULL, NULL);