dm: core: add ofnode_get_path()

Add function for retrieving full node path of a given ofnode.
This uses np->full_name if OF is live, otherwise a call to
fdt_get_path() is made.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c
index 9a69cf7..94a4d21 100644
--- a/test/dm/ofnode.c
+++ b/test/dm/ofnode.c
@@ -297,3 +297,24 @@ static int dm_test_ofnode_get_reg(struct unit_test_state *uts)
 	return 0;
 }
 DM_TEST(dm_test_ofnode_get_reg, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+
+static int dm_test_ofnode_get_path(struct unit_test_state *uts)
+{
+	const char *path = "/translation-test@8000/noxlatebus@3,300/dev@42";
+	char buf[64];
+	ofnode node;
+	int res;
+
+	node = ofnode_path(path);
+	ut_assert(ofnode_valid(node));
+
+	res = ofnode_get_path(node, buf, 64);
+	ut_asserteq(0, res);
+	ut_asserteq_str(path, buf);
+
+	res = ofnode_get_path(node, buf, 32);
+	ut_asserteq(-ENOSPC, res);
+
+	return 0;
+}
+DM_TEST(dm_test_ofnode_get_path, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);