dm: Allow a device to be found by its FDT offset
Each device that was bound from a device tree has an node that caused it to
be bound. Add functions that find and return a device based on a device tree
offset.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
index d8e94d8..7980a68 100644
--- a/test/dm/test-fdt.c
+++ b/test/dm/test-fdt.c
@@ -215,3 +215,33 @@
return 0;
}
DM_TEST(dm_test_fdt_uclass_seq, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test that we can find a device by device tree offset */
+static int dm_test_fdt_offset(struct dm_test_state *dms)
+{
+ const void *blob = gd->fdt_blob;
+ struct udevice *dev;
+ int node;
+
+ node = fdt_path_offset(blob, "/e-test");
+ ut_assert(node > 0);
+ ut_assertok(uclass_get_device_by_of_offset(UCLASS_TEST_FDT, node,
+ &dev));
+ ut_asserteq_str("e-test", dev->name);
+
+ /* This node should not be bound */
+ node = fdt_path_offset(blob, "/junk");
+ ut_assert(node > 0);
+ ut_asserteq(-ENODEV, uclass_get_device_by_of_offset(UCLASS_TEST_FDT,
+ node, &dev));
+
+ /* This is not a top level node so should not be probed */
+ node = fdt_path_offset(blob, "/some-bus/c-test");
+ ut_assert(node > 0);
+ ut_asserteq(-ENODEV, uclass_get_device_by_of_offset(UCLASS_TEST_FDT,
+ node, &dev));
+
+ return 0;
+}
+
+DM_TEST(dm_test_fdt_offset, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);