diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c6d6d53e8cd3..7de1f27d0323 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1942,6 +1942,8 @@ static int _regmap_bus_reg_write(void *context, unsigned int reg,
 {
 	struct regmap *map = context;
 
+	reg += map->reg_base;
+	reg >>= map->format.reg_downshift;
 	return map->bus->reg_write(map->bus_context, reg, val);
 }
 
@@ -2840,6 +2842,8 @@ static int _regmap_bus_reg_read(void *context, unsigned int reg,
 {
 	struct regmap *map = context;
 
+	reg += map->reg_base;
+	reg >>= map->format.reg_downshift;
 	return map->bus->reg_read(map->bus_context, reg, val);
 }
 
@@ -3231,6 +3235,8 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 		*change = false;
 
 	if (regmap_volatile(map, reg) && map->reg_update_bits) {
+		reg += map->reg_base;
+		reg >>= map->format.reg_downshift;
 		ret = map->reg_update_bits(map->bus_context, reg, mask, val);
 		if (ret == 0 && change)
 			*change = true;