+ /*
+ * On some platforms like B4860, default value of MDIO_CLK_DIV bits
+ * in mdio_stat(mdio_cfg) register generates MDIO clock too high
+ * (much higher than 2.5MHz), violating the IEEE specs.
+ * On other platforms like T1040, default value of MDIO_CLK_DIV bits
+ * is zero, so MDIO clock is disabled.
+ * So, for proper functioning of MDIO, MDIO_CLK_DIV bits needs to
+ * be properly initialized.
+ * NEG bit default should be '1' as per FMAN-v3 RM, but on platform
+ * like T2080QDS, this bit default is '0', which leads to MDIO failure
+ * on XAUI PHY, so set this bit definitely.
+ */
+ memac_setbits_32(
+ &((struct memac_mdio_controller *)info->regs)->mdio_stat,
+ MDIO_STAT_CLKDIV(258) | MDIO_STAT_NEG);
+