regulator_set_voltage_tol
ret = regulator_set_voltage_tol(arm_reg, volt, 0);
ret1 = regulator_set_voltage_tol(arm_reg, volt_old, 0);
ret = regulator_set_voltage_tol(arm_reg, volt, 0);
ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);