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--- a/arch/powerpc/platforms/40x/kilauea.c
+++ b/arch/powerpc/platforms/40x/kilauea.c
@@ -21,6 +21,8 @@
#include <asm/uic.h>
#include <asm/pci-bridge.h>
#include <asm/ppc4xx.h>
+#include <asm/dcr.h>
+#include <asm/dcr-regs.h>
static __initdata struct of_device_id kilauea_of_bus[] = {
{ .compatible = "ibm,plb4", },
@@ -46,6 +48,13 @@ static int __init kilauea_probe(void)
ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+ /*
+ * 405EX(r) has SDR0_MFR[E0CS/E1CS] set after reset. This selects
+ * the internal loopback mode. Clear these bits so that both EMACs
+ * don't use loopback mode as deafult.
+ */
+ mtdcri(SDR0, SDR0_MFR, mfdcri(SDR0, SDR0_MFR) & ~0x0c000000);
+
return 1;
}
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