1 files changed, 13 insertions, 7 deletions

diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
index 5fe17d5eaa54..448487e22fa3 100644
--- a/drivers/net/arm/ixp4xx_eth.c
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -335,11 +335,20 @@ static int ixp4xx_mdio_register(void)
         if (!(mdio_bus = mdiobus_alloc()))
                 return -ENOMEM;
 
-        /* All MII PHY accesses use NPE-B Ethernet registers */
-        spin_lock_init(&mdio_lock);
-        mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
-        __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
+        if (cpu_is_ixp43x()) {
+                /* IXP43x lacks NPE-B and uses NPE-C for MII PHY access */
+                if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEC_ETH))
+                        return -ENOSYS;
+                mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
+        } else {
+                /* All MII PHY accesses use NPE-B Ethernet registers */
+                if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
+                        return -ENOSYS;
+                mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+        }
 
+        __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
+        spin_lock_init(&mdio_lock);
         mdio_bus->name = "IXP4xx MII Bus";
         mdio_bus->read = &ixp4xx_mdio_read;
         mdio_bus->write = &ixp4xx_mdio_write;
@@ -1250,9 +1259,6 @@ static struct platform_driver ixp4xx_eth_driver = {
 static int __init eth_init_module(void)
 {
         int err;
-        if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
-                return -ENOSYS;
-
         if ((err = ixp4xx_mdio_register()))
                 return err;
         return platform_driver_register(&ixp4xx_eth_driver);