diff --git a/arch/arm/mach-orion/addr-map.c b/arch/arm/mach-orion/addr-map.c
index ff6e010bccb258b0cfe800357cf218fe6d47951d..488da3811a68041a20bd546728fa6534f21e9272 100644
--- a/arch/arm/mach-orion/addr-map.c
+++ b/arch/arm/mach-orion/addr-map.c
@@ -167,7 +167,9 @@ static int __init orion_cpu_win_can_remap(u32 win)
 	u32 dev, rev;
 
 	orion_pcie_id(&dev, &rev);
-	if ((dev == MV88F5281_DEV_ID && win < 4) || (dev == MV88F5182_DEV_ID && win < 2))
+	if ((dev == MV88F5281_DEV_ID && win < 4)
+	    || (dev == MV88F5182_DEV_ID && win < 2)
+	    || (dev == MV88F5181_DEV_ID && win < 2))
 		return 1;
 
 	return 0;
diff --git a/arch/arm/mach-orion/common.c b/arch/arm/mach-orion/common.c
index 12736fd60004131cc2ec2f62530e9366789f96dd..ff34827f82a56eed99d4f1482f4d8865ca1fd30e 100644
--- a/arch/arm/mach-orion/common.c
+++ b/arch/arm/mach-orion/common.c
@@ -237,6 +237,12 @@ static void orion_id(u32 *dev, u32 *rev, char **dev_name)
 		} else {
 			*dev_name = "MV88F5182-Rev-Unsupported";
 		}
+	} else if (*dev == MV88F5181_DEV_ID) {
+		if (*rev == MV88F5181_REV_B1) {
+			*dev_name = "MV88F5181-Rev-B1";
+		} else {
+			*dev_name = "MV88F5181-Rev-Unsupported";
+		}
 	} else {
 		*dev_name = "Device-Unknown";
 	}
diff --git a/arch/arm/mach-orion/pci.c b/arch/arm/mach-orion/pci.c
index cf569c64711272db4e16544be2567eafd16d6529..0498d7c69b30896e423342fa3bf61804c2d2d6f2 100644
--- a/arch/arm/mach-orion/pci.c
+++ b/arch/arm/mach-orion/pci.c
@@ -154,7 +154,7 @@ static int orion_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
 			PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN);
 
 	orion_pcie_id(&dev, &rev);
-	if (dev == MV88F5182_DEV_ID) {
+	if (dev == MV88F5181_DEV_ID || dev == MV88F5182_DEV_ID) {
 		/* extended register space */
 		pcie_addr = ORION_PCIE_WA_BASE;
 		pcie_addr |= PCIE_CONF_BUS(bus->number) |
diff --git a/include/asm-arm/arch-orion/orion.h b/include/asm-arm/arch-orion/orion.h
index 061c03c5a17e2b63cad8c407f47d0e969e823e6b..f787f752e58c62d9d7c790a12b8f7cfc654dec0a 100644
--- a/include/asm-arm/arch-orion/orion.h
+++ b/include/asm-arm/arch-orion/orion.h
@@ -43,6 +43,9 @@
 /*******************************************************************************
  * Supported Devices & Revisions
  ******************************************************************************/
+/* Orion-1 (88F5181) */
+#define MV88F5181_DEV_ID	0x5181
+#define MV88F5181_REV_B1	3
 /* Orion-NAS (88F5182) */
 #define MV88F5182_DEV_ID	0x5182
 #define MV88F5182_REV_A2	2