[src/trunk]: src/sys/dev/ofw Add of_find_bycompat helper to search a tree for...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/444fb0f7688d
branches:  trunk
changeset: 973899:444fb0f7688d
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu Jul 16 21:32:44 2020 +0000

description:
Add of_find_bycompat helper to search a tree for a node by compat string.

diffstat:

 sys/dev/ofw/ofw_subr.c |  24 ++++++++++++++++++++++--
 sys/dev/ofw/openfirm.h |   3 ++-
 2 files changed, 24 insertions(+), 3 deletions(-)

diffs (62 lines):

diff -r 5e80d960d582 -r 444fb0f7688d sys/dev/ofw/ofw_subr.c
--- a/sys/dev/ofw/ofw_subr.c    Thu Jul 16 18:39:18 2020 +0000
+++ b/sys/dev/ofw/ofw_subr.c    Thu Jul 16 21:32:44 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ofw_subr.c,v 1.39 2020/06/26 10:14:32 martin Exp $     */
+/*     $NetBSD: ofw_subr.c,v 1.40 2020/07/16 21:32:44 jmcneill Exp $   */
 
 /*
  * Copyright 1998
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ofw_subr.c,v 1.39 2020/06/26 10:14:32 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ofw_subr.c,v 1.40 2020/07/16 21:32:44 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -337,6 +337,26 @@
 }
 
 /*
+ * Find a child node that is compatible with str. Recurses, starting at node.
+ */
+int
+of_find_bycompat(int node, const char *str)
+{
+       const char * compatible[] = { str, NULL };
+       int child, ret;
+
+       for (child = OF_child(node); child; child = OF_peer(child)) {
+               if (of_match_compatible(child, compatible) != 0)
+                       return child;
+               ret = of_find_bycompat(child, str);
+               if (ret != -1)
+                       return ret;
+       }
+
+       return -1;
+}
+
+/*
  * Find a give node by name.  Recurses, and seems to walk upwards too.
  */
 
diff -r 5e80d960d582 -r 444fb0f7688d sys/dev/ofw/openfirm.h
--- a/sys/dev/ofw/openfirm.h    Thu Jul 16 18:39:18 2020 +0000
+++ b/sys/dev/ofw/openfirm.h    Thu Jul 16 21:32:44 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: openfirm.h,v 1.38 2019/08/06 18:17:52 tnn Exp $        */
+/*     $NetBSD: openfirm.h,v 1.39 2020/07/16 21:32:44 jmcneill Exp $   */
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -116,6 +116,7 @@
 int    of_decode_int(const unsigned char *);
 int    of_packagename(int, char *, int);
 int    of_find_firstchild_byname(int, const char *);
+int    of_find_bycompat(int, const char *);
 int    of_getnode_byname(int, const char *);
 boolean_t      of_to_uint32_prop(prop_dictionary_t, int, const char *,
     const char *);