MDIO_REQUEST
u32 val = MDIO_REQUEST |
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
u32 val = MDIO_REQUEST | MDIO_READ |
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)