+static int ls_pcie_msi_host_init(struct pcie_port *pp,
+ struct msi_controller *chip)
+{
+ struct device_node *msi_node;
+ struct device_node *np = pp->dev->of_node;
+
+ /*
+ * The MSI domain is set by the generic of_msi_configure(). This
+ * .msi_host_init() function keeps us from doing the default MSI
+ * domain setup in dw_pcie_host_init() and also enforces the
+ * requirement that "msi-parent" exists.
+ */
+ msi_node = of_parse_phandle(np, "msi-parent", 0);
+ if (!msi_node) {
+ dev_err(pp->dev, "failed to find msi-parent\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+