LINFLEXD_LINIER_DTIE
ier &= ~(LINFLEXD_LINIER_DTIE);
writel(ier | LINFLEXD_LINIER_DTIE, port->membase + LINIER);
ier &= ~(LINFLEXD_LINIER_DRIE | LINFLEXD_LINIER_DTIE);
ier |= LINFLEXD_LINIER_DTIE;
ier &= ~(LINFLEXD_LINIER_DRIE | LINFLEXD_LINIER_DTIE);