diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index 679226023f0c..43ffecebf1d8 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -688,6 +688,29 @@ err:
 	return ERR_PTR(rc);
 }
 
+static int cxl_setup_comp_regs(struct device *dev, struct cxl_register_map *map,
+			       resource_size_t component_reg_phys)
+{
+	if (component_reg_phys == CXL_RESOURCE_NONE)
+		return 0;
+
+	*map = (struct cxl_register_map) {
+		.dev = dev,
+		.reg_type = CXL_REGLOC_RBI_COMPONENT,
+		.resource = component_reg_phys,
+		.max_size = CXL_COMPONENT_REG_BLOCK_SIZE,
+	};
+
+	return cxl_setup_regs(map);
+}
+
+static inline int cxl_port_setup_regs(struct cxl_port *port,
+				      resource_size_t component_reg_phys)
+{
+	return cxl_setup_comp_regs(&port->dev, &port->comp_map,
+				   component_reg_phys);
+}
+
 static struct cxl_port *__devm_cxl_add_port(struct device *host,
 					    struct device *uport_dev,
 					    resource_size_t component_reg_phys,
@@ -711,6 +734,10 @@ static struct cxl_port *__devm_cxl_add_port(struct device *host,
 	if (rc)
 		goto err;
 
+	rc = cxl_port_setup_regs(port, component_reg_phys);
+	if (rc)
+		goto err;
+
 	rc = device_add(dev);
 	if (rc)
 		goto err;
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index fe95f08acb69..37fa5b565362 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -547,6 +547,7 @@ struct cxl_dax_region {
  * @regions: cxl_region_ref instances, regions mapped by this port
  * @parent_dport: dport that points to this port in the parent
  * @decoder_ida: allocator for decoder ids
+ * @comp_map: component register capability mappings
  * @nr_dports: number of entries in @dports
  * @hdm_end: track last allocated HDM decoder instance for allocation ordering
  * @commit_end: cursor to track highest committed decoder for commit ordering
@@ -566,6 +567,7 @@ struct cxl_port {
 	struct xarray regions;
 	struct cxl_dport *parent_dport;
 	struct ida decoder_ida;
+	struct cxl_register_map comp_map;
 	int nr_dports;
 	int hdm_end;
 	int commit_end;