MSCC_PHY_PTP_IFACE_CTRL
val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL);
vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL, val);
vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL, val);
val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL);
vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL, val);