+	dwc_priv->eic7700_hsp_regmap =
+			syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+							"eswin,hsp-sp-csr");
+	if (IS_ERR(dwc_priv->eic7700_hsp_regmap))
 		return dev_err_probe(&pdev->dev,
-				PTR_ERR(eic7700_hsp_regmap),
+				PTR_ERR(dwc_priv->eic7700_hsp_regmap),
 				"Failed to get hsp-sp-csr regmap\n");

In order to be backwards compatible, you cannot error out here,
because old DT blobs won't have this property.

	Andrew