ISST_IF_DEV_MBOX
cb = &punit_callbacks[ISST_IF_DEV_MBOX];
info.mbox_supported = punit_callbacks[ISST_IF_DEV_MBOX].registered;
cb = &punit_callbacks[ISST_IF_DEV_MBOX];
if (device_type == ISST_IF_DEV_MBOX)
ret = isst_if_cdev_register(ISST_IF_DEV_MBOX, &cb);
isst_if_cdev_unregister(ISST_IF_DEV_MBOX);
isst_if_cdev_unregister(ISST_IF_DEV_MBOX);
ret = isst_if_cdev_register(ISST_IF_DEV_MBOX, &cb);
isst_if_cdev_unregister(ISST_IF_DEV_MBOX);