iicbus_block_write
error = iicbus_block_write(device_get_parent(iicdev), sc->sc_addr,
error = iicbus_block_write(bus, msgs[i].slave,
extern int iicbus_block_write(device_t, u_char, char *, int, int *);
if (iicbus_block_write(parent, sc->ic_addr, sc->ic_obuf,