dm: core: Add ofnode_read_prop()
Add a new function to read a property that supports reading the length as
well.
Reimplement ofnode_read_string() using it and fix its comment.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c
index 633a3a9..f1e4ed7 100644
--- a/test/dm/ofnode.c
+++ b/test/dm/ofnode.c
@@ -59,6 +59,32 @@
}
DM_TEST(dm_test_ofnode_fmap, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+static int dm_test_ofnode_read(struct unit_test_state *uts)
+{
+ const u32 *val;
+ ofnode node;
+ int size;
+
+ node = ofnode_path("/a-test");
+ ut_assert(ofnode_valid(node));
+
+ val = ofnode_read_prop(node, "int-value", &size);
+ ut_assertnonnull(val);
+ ut_asserteq(4, size);
+ ut_asserteq(1234, fdt32_to_cpu(val[0]));
+
+ val = ofnode_read_prop(node, "missing", &size);
+ ut_assertnull(val);
+ ut_asserteq(-FDT_ERR_NOTFOUND, size);
+
+ /* Check it works without a size parameter */
+ val = ofnode_read_prop(node, "missing", NULL);
+ ut_assertnull(val);
+
+ return 0;
+}
+DM_TEST(dm_test_ofnode_read, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
static int dm_test_ofnode_read_chosen(struct unit_test_state *uts)
{
const char *str;