diff -Nur linux-2.6.24.2/arch/arm/mach-ixp4xx/ixp4xx_npe.c linux-2.6.24.2-owrt/arch/arm/mach-ixp4xx/ixp4xx_npe.c
--- linux-2.6.24.2/arch/arm/mach-ixp4xx/ixp4xx_npe.c	2008-04-22 12:24:29.000000000 +0200
+++ linux-2.6.24.2-owrt/arch/arm/mach-ixp4xx/ixp4xx_npe.c	2008-04-24 13:26:56.000000000 +0200
@@ -571,8 +571,8 @@
 		for (i = 0; i < image->size; i++)
 			image->data[i] = swab32(image->data[i]);
 
-	if (!cpu_is_ixp46x() && ((image->id >> 28) & 0xF /* device ID */)) {
-		print_npe(KERN_INFO, npe, "IXP46x firmware ignored on "
+	if (cpu_is_ixp42x() && ((image->id >> 28) & 0xF /* device ID */)) {
+		print_npe(KERN_INFO, npe, "IXP46x/IXP43x firmware ignored on "
 			  "IXP42x\n");
 		goto err;
 	}
@@ -594,7 +594,7 @@
 		  "revision 0x%X:%X\n", (image->id >> 16) & 0xFF,
 		  (image->id >> 8) & 0xFF, image->id & 0xFF);
 
-	if (!cpu_is_ixp46x()) {
+	if (cpu_is_ixp42x()) {
 		if (!npe->id)
 			instr_size = NPE_A_42X_INSTR_SIZE;
 		else
diff -Nur linux-2.6.24.2/drivers/net/arm/ixp4xx_eth.c linux-2.6.24.2-owrt/drivers/net/arm/ixp4xx_eth.c
--- linux-2.6.24.2/drivers/net/arm/ixp4xx_eth.c	2008-04-22 12:24:29.000000000 +0200
+++ linux-2.6.24.2-owrt/drivers/net/arm/ixp4xx_eth.c	2008-04-24 18:23:24.000000000 +0200
@@ -32,6 +32,7 @@
 #include <linux/kernel.h>
 #include <linux/mii.h>
 #include <linux/platform_device.h>
+#include <asm/arch/cpu.h>
 #include <asm/arch/npe.h>
 #include <asm/arch/qmgr.h>
 
@@ -1238,12 +1239,16 @@
 
 static int __init eth_init_module(void)
 {
-	if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
-		return -ENOSYS;
 
-	/* All MII PHY accesses use NPE-B Ethernet registers */
 	spin_lock_init(&mdio_lock);
-	mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+	if (!cpu_is_ixp43x())
+	/* All MII PHY accesses use NPE-B Ethernet registers */
+		mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+
+	else
+	/* IXP43x lacks NPE-B and uses NPE-C for MII PHY access */
+		mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
+
 	__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
 
 	return platform_driver_register(&drv);
diff -Nur linux-2.6.24.2/include/asm-arm/arch-ixp4xx/cpu.h linux-2.6.24.2-owrt/include/asm-arm/arch-ixp4xx/cpu.h
--- linux-2.6.24.2/include/asm-arm/arch-ixp4xx/cpu.h	2008-04-22 12:24:29.000000000 +0200
+++ linux-2.6.24.2-owrt/include/asm-arm/arch-ixp4xx/cpu.h	2008-04-24 18:15:29.000000000 +0200
@@ -34,6 +34,8 @@
 	val &= ~IXP4XX_FEATURE_RESERVED;
 	if (!cpu_is_ixp46x())
 		val &= ~IXP4XX_FEATURE_IXP46X_ONLY;
+	if (cpu_is_ixp42x())
+		val &= ~IXP4XX_FEATURE_IXP43X_46X;
 
 	return val;
 }
diff -Nur linux-2.6.24.2/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h linux-2.6.24.2-owrt/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h
--- linux-2.6.24.2/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h	2008-04-22 12:24:29.000000000 +0200
+++ linux-2.6.24.2-owrt/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h	2008-04-24 18:15:13.000000000 +0200
@@ -628,11 +628,12 @@
 #define IXP4XX_FEATURE_XSCALE_MAX_FREQ	(3 << 22)
 #define IXP4XX_FEATURE_RESERVED		(0xFF << 24)
 
-#define IXP4XX_FEATURE_IXP46X_ONLY (IXP4XX_FEATURE_ECC_TIMESYNC |	\
+#define IXP4XX_FEATURE_IXP43X_46X (IXP4XX_FEATURE_ECC_TIMESYNC |	\
 				    IXP4XX_FEATURE_USB_HOST |		\
 				    IXP4XX_FEATURE_NPEA_ETH |		\
-				    IXP4XX_FEATURE_NPEB_ETH_1_TO_3 |	\
-				    IXP4XX_FEATURE_RSA |		\
 				    IXP4XX_FEATURE_XSCALE_MAX_FREQ)
 
+#define IXP4XX_FEATURE_IXP46X_ONLY (IXP4XX_FEATURE_NPEB_ETH_1_TO_3 |	\
+				    IXP4XX_FEATURE_RSA)
+
 #endif