diff --git a/drivers/regulator/tps6594-regulator.c b/drivers/regulator/tps6594-regulator.c
index 31a5218d5510..503b89a2f5f8 100644
--- a/drivers/regulator/tps6594-regulator.c
+++ b/drivers/regulator/tps6594-regulator.c
@@ -241,21 +241,21 @@ static const struct regulator_desc tps65224_buck_regs[] = {
 			  TPS65224_MASK_BUCKS_VSET,
 			  TPS6594_REG_BUCKX_CTRL(1),
 			  TPS6594_BIT_BUCK_EN, 0, 0, tps65224_bucks_2_3_4_ranges,
-			  4, 0, 0, NULL, 0, 0),
+			  ARRAY_SIZE(tps65224_bucks_2_3_4_ranges), 0, 0, NULL, 0, 0),
 	TPS6594_REGULATOR("BUCK3", "buck3", TPS6594_BUCK_3,
 			  REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS65224_MASK_BUCKS_VSET,
 			  TPS6594_REG_BUCKX_VOUT_1(2),
 			  TPS65224_MASK_BUCKS_VSET,
 			  TPS6594_REG_BUCKX_CTRL(2),
 			  TPS6594_BIT_BUCK_EN, 0, 0, tps65224_bucks_2_3_4_ranges,
-			  4, 0, 0, NULL, 0, 0),
+			  ARRAY_SIZE(tps65224_bucks_2_3_4_ranges), 0, 0, NULL, 0, 0),
 	TPS6594_REGULATOR("BUCK4", "buck4", TPS6594_BUCK_4,
 			  REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS65224_MASK_BUCKS_VSET,
 			  TPS6594_REG_BUCKX_VOUT_1(3),
 			  TPS65224_MASK_BUCKS_VSET,
 			  TPS6594_REG_BUCKX_CTRL(3),
 			  TPS6594_BIT_BUCK_EN, 0, 0, tps65224_bucks_2_3_4_ranges,
-			  4, 0, 0, NULL, 0, 0),
+			  ARRAY_SIZE(tps65224_bucks_2_3_4_ranges), 0, 0, NULL, 0, 0),
 };
 
 static const struct tps6594_regulator_irq_type tps6594_buck1_irq_types[] = {