+int fwnode_phy_register_fixed_link(struct fwnode_handle *fwnode)
+{
+	struct fixed_phy_status status = {};
+	struct fwnode_handle *fixed_link_node;
+	u32 fixed_link_prop[5];
+	const char *managed;
+	int rc;
+
+	if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
+	    strcmp(managed, "in-band-status") == 0) {
+		/* status is zeroed, namely its .link member */
+		goto register_phy;
+	}
+
+	/* New binding */
+	fixed_link_node = fwnode_get_named_child_node(fwnode, "fixed-link");
+	if (fixed_link_node) {
+		status.link = 1;
+		status.duplex = fwnode_property_present(fixed_link_node,
+							"full-duplex");
+		rc = fwnode_property_read_u32(fixed_link_node, "speed",
+					      &status.speed);
+		if (rc) {
+			fwnode_handle_put(fixed_link_node);
+			return rc;
+		}
+		status.pause = fwnode_property_present(fixed_link_node, "pause");
+		status.asym_pause = fwnode_property_present(fixed_link_node,
+							    "asym-pause");
+		fwnode_handle_put(fixed_link_node);
+
+		goto register_phy;
+	}
+
+	/* Old binding */
+	rc = fwnode_property_read_u32_array(fwnode, "fixed-link", fixed_link_prop,
+					    ARRAY_SIZE(fixed_link_prop));
+	if (rc)
+		return rc;
+
+	status.link = 1;
+	status.duplex = fixed_link_prop[1];
+	status.speed  = fixed_link_prop[2];
+	status.pause  = fixed_link_prop[3];
+	status.asym_pause = fixed_link_prop[4];

This is one example of the issue i just pointed out. The "Old binding"
has been deprecated for years. Maybe a decade? There is no reason it
should be used in ACPI.

       Andrew