i2c_get_functionality
return (i2c_get_functionality(adap) & needed_funcs) == needed_funcs;
func = i2c_get_functionality(client->adapter);
funcs = i2c_get_functionality(client->adapter);
funcs = i2c_get_functionality(client->adapter);
return (func & i2c_get_functionality(adap)) == func;