diff --git a/drivers/pci/pcie_iproc.c b/drivers/pci/pcie_iproc.c
index be03dcb..a31e74a 100644
--- a/drivers/pci/pcie_iproc.c
+++ b/drivers/pci/pcie_iproc.c
@@ -24,15 +24,7 @@
 
 #define CFG_IND_ADDR_MASK            0x00001ffc
 
-#define CFG_ADDR_BUS_NUM_SHIFT       20
-#define CFG_ADDR_BUS_NUM_MASK        0x0ff00000
-#define CFG_ADDR_DEV_NUM_SHIFT       15
-#define CFG_ADDR_DEV_NUM_MASK        0x000f8000
-#define CFG_ADDR_FUNC_NUM_SHIFT      12
-#define CFG_ADDR_FUNC_NUM_MASK       0x00007000
-#define CFG_ADDR_REG_NUM_SHIFT       2
-#define CFG_ADDR_REG_NUM_MASK        0x00000ffc
-#define CFG_ADDR_CFG_TYPE_SHIFT      0
+#define CFG_ADDR_CFG_ECAM_MASK       0xfffffffc
 #define CFG_ADDR_CFG_TYPE_MASK       0x00000003
 
 #define IPROC_PCI_PM_CAP             0x48
@@ -473,11 +465,8 @@
 		return -ENODEV;
 
 	/* EP device access */
-	val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
-		(slot << CFG_ADDR_DEV_NUM_SHIFT) |
-		(fn << CFG_ADDR_FUNC_NUM_SHIFT) |
-		(where & CFG_ADDR_REG_NUM_MASK) |
-		(1 & CFG_ADDR_CFG_TYPE_MASK);
+	val = (PCIE_ECAM_OFFSET(busno, slot, fn, where) & CFG_ADDR_CFG_ECAM_MASK)
+	    | (1 & CFG_ADDR_CFG_TYPE_MASK);
 
 	iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val);
 	offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA);