diff options
| -rw-r--r-- | drivers/core/of_access.c | 18 | ||||
| -rw-r--r-- | include/dm/of_access.h | 10 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/core/of_access.c b/drivers/core/of_access.c index 14c020a687..945b81448c 100644 --- a/drivers/core/of_access.c +++ b/drivers/core/of_access.c @@ -812,6 +812,24 @@ int of_alias_get_id(const struct device_node *np, const char *stem) return id; } +int of_alias_get_highest_id(const char *stem) +{ + struct alias_prop *app; + int id = -1; + + mutex_lock(&of_mutex); + list_for_each_entry(app, &aliases_lookup, link) { + if (strcmp(app->stem, stem) != 0) + continue; + + if (app->id > id) + id = app->id; + } + mutex_unlock(&of_mutex); + + return id; +} + struct device_node *of_get_stdout(void) { return of_stdout; diff --git a/include/dm/of_access.h b/include/dm/of_access.h index 5ed1a0cdb4..13fedb7cf5 100644 --- a/include/dm/of_access.h +++ b/include/dm/of_access.h @@ -425,6 +425,16 @@ int of_alias_scan(void); int of_alias_get_id(const struct device_node *np, const char *stem); /** + * of_alias_get_highest_id - Get highest alias id for the given stem + * @stem: Alias stem to be examined + * + * The function travels the lookup table to get the highest alias id for the + * given alias stem. + * @return alias ID, if found, else -1 + */ +int of_alias_get_highest_id(const char *stem); + +/** * of_get_stdout() - Get node to use for stdout * * @return node referred to by stdout-path alias, or NULL if none |