Author: ian
Date: Sun Feb 16 03:00:59 2014
New Revision: 261955
URL: http://svnweb.freebsd.org/changeset/base/261955
Log:
Add a helper routine to depth-search the device tree for a node with a
matching 'compatible' property. This probably has a short half-life (as
do most of the fdt_ functions), but it helps solve some near-term needs
until we work out the larger problems of device instantiation order
versus the order of things in the fdt data.
Modified:
head/sys/dev/fdt/fdt_common.c
head/sys/dev/fdt/fdt_common.h
Modified: head/sys/dev/fdt/fdt_common.c
==============================================================================
--- head/sys/dev/fdt/fdt_common.c Sun Feb 16 02:33:59 2014
(r261954)
+++ head/sys/dev/fdt/fdt_common.c Sun Feb 16 03:00:59 2014
(r261955)
@@ -223,6 +223,27 @@ fdt_find_compatible(phandle_t start, con
return (0);
}
+phandle_t
+fdt_depth_search_compatible(phandle_t start, const char *compat, int strict)
+{
+ phandle_t child, node;
+
+ /*
+ * Depth-search all descendants of 'start' node, and find first with
+ * matching 'compatible' property.
+ */
+ for (node = OF_child(start); node != 0; node = OF_peer(node)) {
+ if (fdt_is_compatible(node, compat) &&
+ (strict == 0 || fdt_is_compatible_strict(node, compat))) {
+ return (node);
+ }
+ child = fdt_search_compatible(node, compat, strict);
+ if (child != 0)
+ return (child);
+ }
+ return (0);
+}
+
int
fdt_is_enabled(phandle_t node)
{
Modified: head/sys/dev/fdt/fdt_common.h
==============================================================================
--- head/sys/dev/fdt/fdt_common.h Sun Feb 16 02:33:59 2014
(r261954)
+++ head/sys/dev/fdt/fdt_common.h Sun Feb 16 03:00:59 2014
(r261955)
@@ -81,6 +81,7 @@ u_long fdt_data_get(void *, int);
int fdt_data_to_res(pcell_t *, int, int, u_long *, u_long *);
int fdt_data_verify(void *, int);
phandle_t fdt_find_compatible(phandle_t, const char *, int);
+phandle_t fdt_depth_search_compatible(phandle_t, const char *, int);
int fdt_get_mem_regions(struct mem_region *, int *, uint32_t *);
int fdt_get_reserved_regions(struct mem_region *, int *);
int fdt_get_phyaddr(phandle_t, device_t, int *, void **);
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