return ret;
 }
 
-static struct regulator_ops pm8607_regulator_ops = {
+static const struct regulator_ops pm8607_regulator_ops = {
        .list_voltage   = pm8607_list_voltage,
        .set_voltage_sel = regulator_set_voltage_sel_regmap,
        .get_voltage_sel = regulator_get_voltage_sel_regmap,
        .is_enabled = regulator_is_enabled_regmap,
 };
 
-static struct regulator_ops pm8606_preg_ops = {
+static const struct regulator_ops pm8606_preg_ops = {
        .enable         = regulator_enable_regmap,
        .disable        = regulator_disable_regmap,
        .is_enabled     = regulator_is_enabled_regmap,