[PATCH 4/8] devinfo: indicate if device tree nodes are differently populated

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

We don't preclude multiple devices pointing at the same device tree
node. It would be useful information for the user to indicate when
that's the case, so extend devinfo to show the information.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 commands/devinfo.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/commands/devinfo.c b/commands/devinfo.c
index d89d8c2f0ac4..aeb9c5533931 100644
--- a/commands/devinfo.c
+++ b/commands/devinfo.c
@@ -103,8 +103,17 @@ static int do_devinfo(int argc, char *argv[])
 		}
 #ifdef CONFIG_OFDEVICE
 		if (dev->of_node) {
-			printf("Device node: %pOF\n", dev->of_node);
-			of_print_nodes(dev->of_node, 0, ~0);
+			struct device *main_dev = dev->of_node->dev;
+
+			printf("Device node: %pOF", dev->of_node);
+			if (!main_dev) {
+			       printf(" (unpopulated)\n");
+			} else if (main_dev != dev) {
+			       printf(" (populated by %s)\n", dev_name(main_dev));
+			} else {
+				printf("\n");
+				of_print_nodes(dev->of_node, 0, ~0);
+			}
 		}
 #endif
 	}
-- 
2.39.2