MII_M1111_PHY_EXT_CR_DOWNSHIFT_MASK
cnt = FIELD_GET(MII_M1111_PHY_EXT_CR_DOWNSHIFT_MASK, val) + 1;
val |= FIELD_PREP(MII_M1111_PHY_EXT_CR_DOWNSHIFT_MASK, cnt - 1);
MII_M1111_PHY_EXT_CR_DOWNSHIFT_MASK,