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net/faraday: Configure old MDIO interface on Aspeed SoCs

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The Aspeed SoCs have a new MDIO interface as an option in the G4 and G5
SoCs. The old one is still available, so select it in order to remain
compatible with the ftgmac100 driver.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joel Stanley
2016-09-22 08:35:02 +09:30
committed by David S. Miller
parent 08c9c12600
commit e07dc63ba2
2 changed files with 14 additions and 0 deletions
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9
drivers/net/ethernet/faraday/ftgmac100.c
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@@ -1252,12 +1252,21 @@ static int ftgmac100_setup_mdio(struct net_device *netdev)
struct ftgmac100 *priv = netdev_priv(netdev);
struct platform_device *pdev = to_platform_device(priv->dev);
int i, err = 0;
u32 reg;
/* initialize mdio bus */
priv->mii_bus = mdiobus_alloc();
if (!priv->mii_bus)
return -EIO;
if (of_machine_is_compatible("aspeed,ast2400") ||
of_machine_is_compatible("aspeed,ast2500")) {
/* This driver supports the old MDIO interface */
reg = ioread32(priv->base + FTGMAC100_OFFSET_REVR);
reg &= ~FTGMAC100_REVR_NEW_MDIO_INTERFACE;
iowrite32(reg, priv->base + FTGMAC100_OFFSET_REVR);
};
priv->mii_bus->name = "ftgmac100_mdio";
snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%d",
pdev->name, pdev->id);