diff --git a/lib/fconf/fconf_dyn_cfg_getter.c b/lib/fconf/fconf_dyn_cfg_getter.c
index 317d3e5..03aaf9b 100644
--- a/lib/fconf/fconf_dyn_cfg_getter.c
+++ b/lib/fconf/fconf_dyn_cfg_getter.c
@@ -57,26 +57,32 @@
 	}
 
 	fdt_for_each_subnode(child, dtb, node) {
+		uint32_t val32;
+		uint64_t val64;
+
 		dtb_info = pool_alloc(&dtb_info_pool);
 
 		/* Read configuration dtb information */
-		rc = fdtw_read_cells(dtb, child, "load-address", 2, &dtb_info->config_addr);
+		rc = fdt_read_uint64(dtb, child, "load-address", &val64);
 		if (rc < 0) {
 			ERROR("FCONF: Incomplete configuration property in dtb-registry.\n");
 			return rc;
 		}
+		dtb_info->config_addr = (uintptr_t)val64;
 
-		rc = fdtw_read_cells(dtb, child, "max-size", 1, &dtb_info->config_max_size);
+		rc = fdt_read_uint32(dtb, child, "max-size", &val32);
 		if (rc < 0) {
 			ERROR("FCONF: Incomplete configuration property in dtb-registry.\n");
 			return rc;
 		}
+		dtb_info->config_max_size = val32;
 
-		rc = fdtw_read_cells(dtb, child, "id", 1, &dtb_info->config_id);
+		rc = fdt_read_uint32(dtb, child, "id", &val32);
 		if (rc < 0) {
 			ERROR("FCONF: Incomplete configuration property in dtb-registry.\n");
 			return rc;
 		}
+		dtb_info->config_id = val32;
 
 		VERBOSE("FCONF: dyn_cfg.dtb_registry cell found with:\n");
 		VERBOSE("\tload-address = %lx\n", dtb_info->config_addr);
diff --git a/lib/fconf/fconf_tbbr_getter.c b/lib/fconf/fconf_tbbr_getter.c
index a4d61d8..2127801 100644
--- a/lib/fconf/fconf_tbbr_getter.c
+++ b/lib/fconf/fconf_tbbr_getter.c
@@ -17,6 +17,8 @@
 {
 	int err;
 	int node;
+	uint64_t val64;
+	uint32_t val32;
 
 	/* As libfdt use void *, we can't avoid this cast */
 	const void *dtb = (void *)config;
@@ -30,7 +32,7 @@
 	}
 
 	/* Locate the disable_auth cell and read the value */
-	err = fdtw_read_cells(dtb, node, "disable_auth", 1, &tbbr_dyn_config.disable_auth);
+	err = fdt_read_uint32(dtb, node, "disable_auth", &tbbr_dyn_config.disable_auth);
 	if (err < 0) {
 		WARN("FCONF: Read cell failed for `disable_auth`\n");
 		return err;
@@ -48,19 +50,19 @@
 #endif
 
 	/* Retrieve the Mbed TLS heap details from the DTB */
-	err = fdtw_read_cells(dtb, node,
-		"mbedtls_heap_addr", 2, &tbbr_dyn_config.mbedtls_heap_addr);
+	err = fdt_read_uint64(dtb, node, "mbedtls_heap_addr", &val64);
 	if (err < 0) {
 		ERROR("FCONF: Read cell failed for mbedtls_heap\n");
 		return err;
 	}
+	tbbr_dyn_config.mbedtls_heap_addr = (void *)(uintptr_t)val64;
 
-	err = fdtw_read_cells(dtb, node,
-		"mbedtls_heap_size", 1, &tbbr_dyn_config.mbedtls_heap_size);
+	err = fdt_read_uint32(dtb, node, "mbedtls_heap_size", &val32);
 	if (err < 0) {
 		ERROR("FCONF: Read cell failed for mbedtls_heap\n");
 		return err;
 	}
+	tbbr_dyn_config.mbedtls_heap_size = val32;
 
 	VERBOSE("FCONF:tbbr.disable_auth cell found with value = %d\n",
 					tbbr_dyn_config.disable_auth);