i2cnex_nex_alloc
port->ip_nex = i2cnex_nex_alloc(I2C_NEXUS_T_PORT, pdip, pnex, NULL,
extern i2c_nexus_t *i2cnex_nex_alloc(i2c_nexus_type_t, dev_info_t *,
ctrl->ic_nexus = i2cnex_nex_alloc(I2C_NEXUS_T_CTRL, reg->ic_dip, NULL,
dev->id_nex = i2cnex_nex_alloc(I2C_NEXUS_T_DEV, port->ip_nex->in_dip,
mux->im_nex = i2cnex_nex_alloc(I2C_NEXUS_T_MUX, nex->in_dip, nex, NULL,