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authorThierry Reding <treding@nvidia.com>2014-08-26 17:33:51 +0200
committerSimon Glass <sjg@chromium.org>2014-10-22 16:56:40 -0600
commitfc503c1791f35294d04495cd8ba3794bb6f15055 (patch)
tree533bf4e7806abd8a90b41e8ec6a7c7390fe8d47f /lib/libfdt
parentbc4147ab2d698bf7375a10af73ce34d76129edff (diff)
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fdt: Add a function to get the index of a string
Given a device tree node and a property name, the new fdt_find_string() function will look up a given string in the string list contained in the property's value and return its index. 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.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c
index cb06a9b..fec4a0a 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -511,6 +511,32 @@ int fdt_count_strings(const void *fdt, int node, const char *property)
return count;
}
+int fdt_find_string(const void *fdt, int node, const char *property,
+ const char *string)
+{
+ const char *list, *end;
+ int len, index = 0;
+
+ list = fdt_getprop(fdt, node, property, &len);
+ if (!list)
+ return len;
+
+ end = list + len;
+ len = strlen(string);
+
+ while (list < end) {
+ int l = strlen(list);
+
+ if (l == len && memcmp(list, string, len) == 0)
+ return index;
+
+ list += l + 1;
+ index++;
+ }
+
+ return -FDT_ERR_NOTFOUND;
+}
+
int fdt_node_check_compatible(const void *fdt, int nodeoffset,
const char *compatible)
{