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authorGrant Likely <grant.likely@secretlab.ca>2011-08-04 10:27:32 +0100
committerGrant Likely <grant.likely@secretlab.ca>2011-08-04 11:26:24 +0100
commitfe55c1844a1c106e9d9d3dd27cbfcf8caeb9e77e (patch)
tree85bbcd23d3f5fcc6b19abfc29d5ffea9608a6fcb /drivers
parent9e191b22c91873c09c722d7f956ab9f3276f9a37 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/of/base.c130
-rw-r--r--drivers/of/fdt.c4
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 */

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