PSVC_SETPOINT_ATTR
status = psvc_set_attr(hdlp, id, PSVC_SETPOINT_ATTR, &lowest_temp);
case PSVC_SETPOINT_ATTR:
case PSVC_SETPOINT_ATTR:
case PSVC_SETPOINT_ATTR:
if (i_psvc_value(buf, PSVC_SETPOINT_ATTR, &dp->setpoint)
err = psvc_get_attr(hdlp, fan_id, PSVC_SETPOINT_ATTR, &setpoint);