iicbus_block_read
error = iicbus_block_read(device_get_parent(iicdev), sc->sc_addr,
if (!iicbus_block_read(dev, addr, &byte, 1, &count))
error = iicbus_block_read(bus, msgs[i].slave,
extern int iicbus_block_read(device_t, u_char, char *, int, int *);