lpc_intr_establish
void *(*lpc_intr_establish)(lpctag_t, uint, int, int,
ih = (*sc->sc_bus_ops->lpc_intr_establish)
lpc_intr_establish(lpc->lpc_tag, lpc->lpc_intr,
lpc_intr_establish(lpc->lpc_tag, lpc->lpc_intr,