On Tue, Dec 15, 2020 at 6:44 PM Calvin Johnson
[off-list ref] wrote:

Using fwnode_get_id(), get the reg property value for DT node
and get the _ADR object value for ACPI node.

and -> or

...

+/**
+ * fwnode_get_id - Get the id of a fwnode.
+ * @fwnode: firmware node
+ * @id: id of the fwnode
+ *
+ * Returns 0 on success or a negative errno.
+ */
+int fwnode_get_id(struct fwnode_handle *fwnode, u32 *id)
+{
+       unsigned long long adr;
+       acpi_status status;
+
+       if (is_of_node(fwnode)) {
+               return of_property_read_u32(to_of_node(fwnode), "reg", id);

ACPI nodes can hold reg property as well. I would rather think about

ret = fwnode_property_read_u32(fwnode, "reg", id)
if (!(ret && is_acpi_node(fwnode)))
  return ret;

+       } else if (is_acpi_node(fwnode)) {

Redundant 'else'

+               status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(fwnode),
+                                              METHOD_NAME__ADR, NULL, &adr);
+               if (ACPI_FAILURE(status))
+                       return -ENODATA;

I'm wondering if it compiles when CONFIG_ACPI=n.

+               *id = (u32)adr;
+               return 0;
+       }

+       return -EINVAL;
+}

-- 
With Best Regards,
Andy Shevchenko

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