binman: Skip node generation for images read from files

We can and should run the node generator only when creating a new image.
When we read it back, there is no need to generate nodes - they already
exits, and binman does not dive that deep into the image - and there is
no way to provide the required fdt-list. So store the mode in the image
object so that Entry_fit can simply skip generator nodes when reading
them from an fdtmap.

This unbreaks all read-backs of images that contain generator nodes in
their fdtmap. To confirm this, add a corresponding test case.

Signed-off-by: Jan Kiszka <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Tested-by: Simon Glass <[email protected]>
Add SPDX to dts file:
Signed-off-by: Simon Glass <[email protected]>

1 files changed, 26 insertions, 0 deletions

diff --git a/tools/binman/test/219_fit_gennode.dts b/tools/binman/test/219_fit_gennode.dts
new file mode 100644
index 00000000000..e9eda29983a
--- /dev/null
+++ b/tools/binman/test/219_fit_gennode.dts
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		fit {
+			description = "test-desc";
+			#address-cells = <1>;
+			fit,fdt-list = "of-list";
+
+			images {
+				@fdt-SEQ {
+					description = "fdt-NAME.dtb";
+					type = "flat_dt";
+					compression = "none";
+				};
+			};
+		};
+		fdtmap {
+		};
+	};
+};