diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index bd7828e0f2f5..b63ac46beceb 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -899,12 +899,12 @@ static int device_pca95xx_init(struct pca953x_chip *chip, u32 invert)
 	int ret;
 
 	ret = regcache_sync_region(chip->regmap, chip->regs->output,
-				   chip->regs->output + NBANK(chip));
+				   chip->regs->output + NBANK(chip) - 1);
 	if (ret)
 		goto out;
 
 	ret = regcache_sync_region(chip->regmap, chip->regs->direction,
-				   chip->regs->direction + NBANK(chip));
+				   chip->regs->direction + NBANK(chip) - 1);
 	if (ret)
 		goto out;
 
@@ -1117,14 +1117,14 @@ static int pca953x_regcache_sync(struct device *dev)
 	 * sync these registers first and only then sync the rest.
 	 */
 	regaddr = pca953x_recalc_addr(chip, chip->regs->direction, 0);
-	ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip));
+	ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip) - 1);
 	if (ret) {
 		dev_err(dev, "Failed to sync GPIO dir registers: %d\n", ret);
 		return ret;
 	}
 
 	regaddr = pca953x_recalc_addr(chip, chip->regs->output, 0);
-	ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip));
+	ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip) - 1);
 	if (ret) {
 		dev_err(dev, "Failed to sync GPIO out registers: %d\n", ret);
 		return ret;
@@ -1134,7 +1134,7 @@ static int pca953x_regcache_sync(struct device *dev)
 	if (chip->driver_data & PCA_PCAL) {
 		regaddr = pca953x_recalc_addr(chip, PCAL953X_IN_LATCH, 0);
 		ret = regcache_sync_region(chip->regmap, regaddr,
-					   regaddr + NBANK(chip));
+					   regaddr + NBANK(chip) - 1);
 		if (ret) {
 			dev_err(dev, "Failed to sync INT latch registers: %d\n",
 				ret);
@@ -1143,7 +1143,7 @@ static int pca953x_regcache_sync(struct device *dev)
 
 		regaddr = pca953x_recalc_addr(chip, PCAL953X_INT_MASK, 0);
 		ret = regcache_sync_region(chip->regmap, regaddr,
-					   regaddr + NBANK(chip));
+					   regaddr + NBANK(chip) - 1);
 		if (ret) {
 			dev_err(dev, "Failed to sync INT mask registers: %d\n",
 				ret);