qca8k_mii_write_hi
qca8k_mii_write_hi(bus, phy_id, regnum + 1, val);
qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, 0);
qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, val);
qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, 0);