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authorThierry Reding <treding@nvidia.com>2014-08-26 17:33:52 +0200
committerSimon Glass <sjg@chromium.org>2014-10-22 16:56:41 -0600
commit5094eb408a5de69cce8e6bc5564fda10eb79eba0 (patch)
treeb776b923538e7556387a406a0e68498a261d8b6e /lib/libfdt
parentfc503c1791f35294d04495cd8ba3794bb6f15055 (diff)
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fdt: Add functions to retrieve strings
Given a device tree node, a property name and an index, the new function fdt_get_string_index() will return in an output argument a pointer to the index'th string in the property's value. The fdt_get_string() is a shortcut for the above with the index being 0. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/libfdt')
-rw-r--r--lib/libfdt/fdt_ro.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c
index fec4a0a..03733e5 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -537,6 +537,36 @@ int fdt_find_string(const void *fdt, int node, const char *property,
return -FDT_ERR_NOTFOUND;
}
+int fdt_get_string_index(const void *fdt, int node, const char *property,
+ int index, const char **output)
+{
+ const char *list;
+ int length, i;
+
+ list = fdt_getprop(fdt, node, property, &length);
+
+ for (i = 0; i < length; i++) {
+ int len = strlen(list);
+
+ if (index == 0) {
+ *output = list;
+ return 0;
+ }
+
+ list += len + 1;
+ i += len;
+ index--;
+ }
+
+ return FDT_ERR_NOTFOUND;
+}
+
+int fdt_get_string(const void *fdt, int node, const char *property,
+ const char **output)
+{
+ return fdt_get_string_index(fdt, node, property, 0, output);
+}
+
int fdt_node_check_compatible(const void *fdt, int nodeoffset,
const char *compatible)
{