TN40_REG_MDIO_CMD_STAT
tn40_write_reg(priv, TN40_REG_MDIO_CMD_STAT, 0x3ec8);
writel(mdio_cfg, regs + TN40_REG_MDIO_CMD_STAT);
return readl(regs + TN40_REG_MDIO_CMD_STAT);