do_i2c_scan
do_i2c_scan(btv->c.v4l2_dev.name, &btv->i2c_client);
do_i2c_scan(dev->name, &bus->i2c_client);
do_i2c_scan(core->name, &core->i2c_client);
do_i2c_scan(&dev->i2c_client);
do_i2c_scan(KBUILD_MODNAME, &dev->i2c_client);
if (i2c_scan) do_i2c_scan(hdw);