net: sun8i-emac: fix MDIO frequency

Commit 4f0278dac56a ("net: sun8i-emac: Lower MDIO frequency") leads to
network failure on the OrangePi PC.

    => dhcp
    sun8i_emac_eth_start: Timeout

According to the commit message the change of the MDIO frequency is only
required for external PHYs.

Fixes: 4f0278dac56a ("net: sun8i-emac: Lower MDIO frequency")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index 5a1b38bf80f48309f12931cc009306935673126e..d7553fe1634b8b11e3339678fae3f8050620b17f 100644 (file)
--- a/drivers/net/sun8i_emac.c
+++ b/drivers/net/sun8i_emac.c
@@ -211,7 +211,9 @@ static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
         * The EMAC clock is either 200 or 300 MHz, so we need a divider
         * of 128 to get the MDIO frequency below the required 2.5 MHz.
         */
-       mii_cmd |= MDIO_CMD_MII_CLK_CSR_DIV_128 << MDIO_CMD_MII_CLK_CSR_SHIFT;
+       if (!priv->use_internal_phy)
+               mii_cmd |= MDIO_CMD_MII_CLK_CSR_DIV_128 <<
+                          MDIO_CMD_MII_CLK_CSR_SHIFT;
 
        mii_cmd |= MDIO_CMD_MII_BUSY;
 
@@ -242,7 +244,9 @@ static int sun8i_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
         * The EMAC clock is either 200 or 300 MHz, so we need a divider
         * of 128 to get the MDIO frequency below the required 2.5 MHz.
         */
-       mii_cmd |= MDIO_CMD_MII_CLK_CSR_DIV_128 << MDIO_CMD_MII_CLK_CSR_SHIFT;
+       if (!priv->use_internal_phy)
+               mii_cmd |= MDIO_CMD_MII_CLK_CSR_DIV_128 <<
+                          MDIO_CMD_MII_CLK_CSR_SHIFT;
 
        mii_cmd |= MDIO_CMD_MII_WRITE;
        mii_cmd |= MDIO_CMD_MII_BUSY;