diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 164d17706486..fa9beb3eb60c 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -369,6 +369,7 @@ struct pmbus_driver_info {
 
 /* Function declarations */
 
+void pmbus_clear_cache(struct i2c_client *client);
 int pmbus_set_page(struct i2c_client *client, u8 page);
 int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);
 int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word);
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 3b5c24dd0b75..32f4530cd1e8 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -113,6 +113,14 @@ struct pmbus_data {
 	u8 currpage;
 };
 
+void pmbus_clear_cache(struct i2c_client *client)
+{
+	struct pmbus_data *data = i2c_get_clientdata(client);
+
+	data->valid = false;
+}
+EXPORT_SYMBOL_GPL(pmbus_clear_cache);
+
 int pmbus_set_page(struct i2c_client *client, u8 page)
 {
 	struct pmbus_data *data = i2c_get_clientdata(client);