Revert "dt: add of_alias_scan and of_alias_get_id"

This reverts commit 750f463a749e28464151ad26938d11b07b1c43cb.

of_alias_* still needs work to be generalized for 'promtree' dt
platforms, and to no implicitly create entries for available ids.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

2 files changed, 1 insertions, 133 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index fb28b5af733b..3ff22e32b602 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -17,39 +17,14 @@
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  */
-#include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 
-/**
- * struct alias_prop - Alias property in 'aliases' node
- * @link:       List node to link the structure in aliases_lookup list
- * @alias:      Alias property name
- * @np:         Pointer to device_node that the alias stands for
- * @id:         Index value from end of alias name
- * @stem:       Alias string without the index
- *
- * The structure represents one alias property of 'aliases' node as
- * an entry in aliases_lookup list.
- */
-struct alias_prop {
-        struct list_head link;
-        const char *alias;
-        struct device_node *np;
-        int id;
-        char stem[0];
-};
-
-static LIST_HEAD(aliases_lookup);
-
 struct device_node *allnodes;
 struct device_node *of_chosen;
-struct device_node *of_aliases;
-
-static DEFINE_MUTEX(of_aliases_mutex);
 
 /* use when traversing tree through the allnext, child, sibling,
  * or parent members of struct device_node.
@@ -1013,108 +988,3 @@ out_unlock:
 }
 #endif /* defined(CONFIG_OF_DYNAMIC) */
 
-static void of_alias_add(struct alias_prop *ap, struct device_node *np,
-                         int id, const char *stem, int stem_len)
-{
-        ap->id = id;
-        ap->np = np;
-        strncpy(ap->stem, stem, stem_len);
-        ap->stem[stem_len] = 0;
-        list_add_tail(&ap->link, &aliases_lookup);
-        pr_debug("adding DT alias:%s: stem=%s id=%i node=%s\n",
-                 ap->alias, ap->stem, ap->id, np ? np->full_name : NULL);
-}
-
-/**
- * of_alias_scan() - Scan all properties of 'aliases' node
- *
- * The function scans all the properties of 'aliases' node and populate
- * the global lookup table with the properties.  It returns the
- * number of alias_prop found, or error code in error case.
- */
-__init void of_alias_scan(void)
-{
-        struct property *pp;
-
-        if (!of_aliases)
-                return;
-
-        for_each_property(pp, of_aliases->properties) {
-                const char *start = pp->name;
-                const char *end = start + strlen(start);
-                struct device_node *np;
-                struct alias_prop *ap;
-                int id, len;
-
-                /* Skip those we do not want to proceed */
-                if (!strcmp(pp->name, "name") ||
-                    !strcmp(pp->name, "phandle") ||
-                    !strcmp(pp->name, "linux,phandle"))
-                        continue;
-
-                np = of_find_node_by_path(pp->value);
-                if (!np)
-                        continue;
-
-                /* walk alias backwards to extract the id and 'stem' string */
-                while (isdigit(*(end-1)) && end > start)
-                        end--;
-                len = end - start;
-                id = strlen(end) ? simple_strtoul(end, NULL, 10) : -1;
-
-                /* Allocate an alias_prop with enough space for the stem */
-                ap = early_init_dt_alloc_memory_arch(sizeof(*ap) + len + 1, 4);
-                if (!ap)
-                        continue;
-                ap->alias = start;
-                of_alias_add(ap, np, id, start, len);
-        }
-}
-
-/**
- * of_alias_get_id() - Get alias id for the given device_node
- * @np:         Pointer to the given device_node
- * @stem:       Alias stem of the given device_node
- *
- * The function travels the lookup table to get alias id for the given
- * device_node and alias stem.  It returns the alias id if find it.
- * If not, dynamically creates one in the lookup table and returns it,
- * or returns error code if fail to create.
- */
-int of_alias_get_id(struct device_node *np, const char *stem)
-{
-        struct alias_prop *app;
-        int id = 0;
-        bool found = false;
-
-        mutex_lock(&of_aliases_mutex);
-        list_for_each_entry(app, &aliases_lookup, link) {
-                if (strcmp(app->stem, stem) != 0)
-                        continue;
-
-                if (np == app->np) {
-                        found = true;
-                        id = app->id;
-                        break;
-                }
-
-                if (id <= app->id)
-                        id = app->id + 1;
-        }
-
-        /* If an id is not found, then allocate a new one */
-        if (!found) {
-                app = kzalloc(sizeof(*app) + strlen(stem) + 1, 4);
-                if (!app) {
-                        id = -ENODEV;
-                        goto out;
-                }
-                of_alias_add(app, np, id, stem, strlen(stem));
-        }
-
- out:
-        mutex_unlock(&of_aliases_mutex);
-
-        return id;
-}
-EXPORT_SYMBOL_GPL(of_alias_get_id);
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 13d6d3a96b31..65200af29c52 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -707,12 +707,10 @@ void __init unflatten_device_tree(void)
         __unflatten_device_tree(initial_boot_params, &allnodes,
                                 early_init_dt_alloc_memory_arch);
 
-        /* Get pointer to "/chosen" and "/aliasas" nodes for use everywhere */
+        /* Get pointer to OF "/chosen" node for use everywhere */
         of_chosen = of_find_node_by_path("/chosen");
         if (of_chosen == NULL)
                 of_chosen = of_find_node_by_path("/chosen@0");
-        of_aliases = of_find_node_by_path("/aliases");
-        of_alias_scan();
 }
 
 #endif /* CONFIG_OF_EARLY_FLATTREE */