   load_ua = rmi0_data->board->power_down_enable ? 0 : RMI0_LPM_LOAD_UA;  retval = reg_set_optimum_mode_check(rmi0_data->vdd, load_ua);  if (retval < 0) {   dev_err(&rmi0_data->i0c_client->dev,    "Regulator vdd_ana set_opt failed rc=%d\n",    retval);   goto fail_regulator_