quoted

quoted

I think extending of_empty_ranges_quirk() may be a reasonable

solution.

quoted

What do you think Arnd?

I don't really like that idea, that quirk is meant to work around
broken DTs, but we can just make the DT valid and implement the
code properly.

Ok  I understand your point where it is not right to use of_empty_ranges_quirk()
As a quirk is used to work around broken HW or broken FW (as in this case)
rather than to fix code

What about the following? I think adding the check you suggested next to
of_empty_ranges_quirk() is adding the case we need in the right point (thus
avoiding any duplication)
 

--- a/drivers/of/address.c
+++ b/drivers/of/address.c

@@ -457,6 +457,15 @@ static struct of_bus *of_match_bus(struct device_node *np)
        return NULL;
 }
 
+static inline int of_isa_indirect_io(struct device_node *np)
+{
+       /*
+        * check if the current node is an isa bus and if indirectio operation
+        * are registered
+        */
+       return (of_bus_isa_match(np) && arm64_extio_ops);
+}
+
 static int of_empty_ranges_quirk(struct device_node *np)
 {
        if (IS_ENABLED(CONFIG_PPC)) {

@@ -503,7 +512,7 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
         * This code is only enabled on powerpc. --gcl
         */
        ranges = of_get_property(parent, rprop, &rlen);
-       if (ranges == NULL && !of_empty_ranges_quirk(parent)) {
+       if (ranges == NULL && !of_empty_ranges_quirk(parent) && !of_isa_indirect_io(parent)) {
                pr_debug("OF: no ranges; cannot translate\n");
                return 1;
        }