tvp7002_write
error = tvp7002_write(sd, TVP7002_SYNC_CTL_1, polarity_a);
error = tvp7002_write(sd, TVP7002_MISC_CTL_3, polarity_b);
*err = tvp7002_write(sd, reg, val);
return tvp7002_write(sd, reg->reg & 0xff, reg->val & 0xff);
error = tvp7002_write(sd, TVP7002_MISC_CTL_2, enable ? 0x00 : 0x03);