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author | Grant Likely <grant.likely@secretlab.ca> | 2011-08-04 09:27:32 (GMT) |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2011-08-04 10:26:24 (GMT) |
commit | fe55c1844a1c106e9d9d3dd27cbfcf8caeb9e77e (patch) | |
tree | 85bbcd23d3f5fcc6b19abfc29d5ffea9608a6fcb /drivers/of | |
parent | 9e191b22c91873c09c722d7f956ab9f3276f9a37 (diff) | |
download | linux-fe55c1844a1c106e9d9d3dd27cbfcf8caeb9e77e.tar.xz |
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/of')
-rw-r--r-- | drivers/of/base.c | 130 | ||||
-rw-r--r-- | drivers/of/fdt.c | 4 |
2 files changed, 1 insertions, 133 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index fb28b5a..3ff22e3 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 13d6d3a..65200af 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 */ |