PMBUS_VIRT_FAN_TARGET_1
0xff, PMBUS_VIRT_FAN_TARGET_1 + id, PSC_FAN,
case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4:
id = reg - PMBUS_VIRT_FAN_TARGET_1;
case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4:
id = reg - PMBUS_VIRT_FAN_TARGET_1;
reg = want_rpm ? PMBUS_VIRT_FAN_TARGET_1 : PMBUS_VIRT_PWM_1;