case TUNER_SET_TVFREQ:
case VIDIOCSFREQ:
tuner_command(struct i2c_client *client, unsigned int cmd, void *arg){	int *iarg = (int*)arg;	switch (cmd) 	{		case TUNER_SET_TVFREQ:			set_tv_freq(client, *iarg);			break;	    		default:			return -EINVAL;	}	return 0;}