bbc_i2c_readb
bbc_i2c_readb(tp->client,
bbc_i2c_readb(tp->client,
ret = bbc_i2c_readb(client, buf, off);
EXPORT_SYMBOL(bbc_i2c_readb);
extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off);