SEL_VOLTAGE_STEP
cur_uvolt = (oval & SEL_VOLTAGE_MASK) * SEL_VOLTAGE_STEP +
val = SEL_GO | ((min_uvolt - SEL_VOLTAGE_BASE) / SEL_VOLTAGE_STEP);
(abs(cur_uvolt - min_uvolt) / SEL_VOLTAGE_STEP);
*uvolt = (val & SEL_VOLTAGE_MASK) * SEL_VOLTAGE_STEP +