[src/trunk]: src/sys/dev/fdt Add a helper to search the tree for a node with ...

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

details:   https://anonhg.NetBSD.org/src/rev/7549fb62f05d
branches:  trunk
changeset: 447633:7549fb62f05d
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Jan 19 20:50:48 2019 +0000

description:
Add a helper to search the tree for a node with the specified property

diffstat:

 sys/dev/fdt/fdtbus.c |  22 ++++++++++++++++++++--
 sys/dev/fdt/fdtvar.h |   3 ++-
 2 files changed, 22 insertions(+), 3 deletions(-)

diffs (60 lines):

diff -r 4f7bb628ac24 -r 7549fb62f05d sys/dev/fdt/fdtbus.c
--- a/sys/dev/fdt/fdtbus.c      Sat Jan 19 20:42:54 2019 +0000
+++ b/sys/dev/fdt/fdtbus.c      Sat Jan 19 20:50:48 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdtbus.c,v 1.25 2019/01/02 14:54:54 jmcneill Exp $ */
+/* $NetBSD: fdtbus.c,v 1.26 2019/01/19 20:50:48 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fdtbus.c,v 1.25 2019/01/02 14:54:54 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fdtbus.c,v 1.26 2019/01/19 20:50:48 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -345,6 +345,24 @@
        }
 }
 
+int
+fdt_find_with_property(const char *prop, int *pindex)
+{
+       struct fdt_node *node;
+       int index = 0;
+
+       TAILQ_FOREACH(node, &fdt_nodes, n_nodes) {
+               if (index < *pindex)
+                       continue;
+               if (of_hasprop(node->n_phandle, prop)) {
+                       *pindex = index;
+                       return node->n_phandle;
+               }
+       }
+
+       return -1;
+}
+
 static u_int
 fdt_get_order(int phandle)
 {
diff -r 4f7bb628ac24 -r 7549fb62f05d sys/dev/fdt/fdtvar.h
--- a/sys/dev/fdt/fdtvar.h      Sat Jan 19 20:42:54 2019 +0000
+++ b/sys/dev/fdt/fdtvar.h      Sat Jan 19 20:50:48 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdtvar.h,v 1.44 2019/01/02 18:38:43 jmcneill Exp $ */
+/* $NetBSD: fdtvar.h,v 1.45 2019/01/19 20:50:48 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -368,6 +368,7 @@
 
 void           fdt_remove_byhandle(int);
 void           fdt_remove_bycompat(const char *[]);
+int            fdt_find_with_property(const char *, int *);
 int            fdtbus_print(void *, const char *);
 
 #endif /* _DEV_FDT_FDTVAR_H */