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-rw-r--r--include/fdtdec.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h
index a7e6ee7..f454f7e 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -345,6 +345,24 @@ int fdtdec_find_aliases_for_id(const void *blob, const char *name,
int fdtdec_add_aliases_for_id(const void *blob, const char *name,
enum fdt_compat_id id, int *node_list, int maxcount);
+/**
+ * Get the alias sequence number of a node
+ *
+ * This works out whether a node is pointed to by an alias, and if so, the
+ * sequence number of that alias. Aliases are of the form <base><num> where
+ * <num> is the sequence number. For example spi2 would be sequence number
+ * 2.
+ *
+ * @param blob Device tree blob (if NULL, then error is returned)
+ * @param base Base name for alias (before the underscore)
+ * @param node Node to look up
+ * @param seqp This is set to the sequence number if one is found,
+ * but otherwise the value is left alone
+ * @return 0 if a sequence was found, -ve if not
+ */
+int fdtdec_get_alias_seq(const void *blob, const char *base, int node,
+ int *seqp);
+
/*
* Get the name for a compatible ID
*