REG_SW_VLAN_CTRL
ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_START | VLAN_WRITE);
ksz_write8(dev, REG_SW_VLAN_CTRL, 0);
return regmap_read_poll_timeout(ksz_regmap_8(dev), REG_SW_VLAN_CTRL,
ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_READ | VLAN_START);
ksz_write8(dev, REG_SW_VLAN_CTRL, 0);