[PATCH 3/3] tools: mkimage: add cmd-line option '-L' to force legacy images

[Marc Kleine-Budde]

If the user select the image type "flat_dt" a FIT image will be build.
This breaks the legacy use case of putting a Flat Device Tree into a
legacy u-boot image.

Add command line options "-L" and "--legacy" to let the user force the
creation of a legacy u-boot image, even if "flat_dt" is selected.

Link: https://lore.kernel.org/all/20221028155205.ojw6tcso2fofgnhm@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>
---
 tools/default_image.c | 1 +
 tools/fit_common.c    | 3 +++
 tools/mkimage.c       | 7 ++++++-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/default_image.c b/tools/default_image.c
index 9a6b50a946ba..3673eaa63de2 100644
--- a/tools/default_image.c
+++ b/tools/default_image.c
@@ -27,6 +27,7 @@ static struct legacy_img_hdr header;
 static int image_check_image_types(uint8_t type, bool legacy)
 {
 	if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
+	    ((type == IH_TYPE_FLATDT) && legacy) ||
 	    (type == IH_TYPE_KERNEL_NOLOAD) || (type == IH_TYPE_FIRMWARE_IVT))
 		return EXIT_SUCCESS;
 	else
diff --git a/tools/fit_common.c b/tools/fit_common.c
index b4aa89b53577..eba13a789a72 100644
--- a/tools/fit_common.c
+++ b/tools/fit_common.c
@@ -43,6 +43,9 @@ int fit_verify_header(unsigned char *ptr, int image_size,
 
 int fit_check_image_types(uint8_t type, bool legacy)
 {
+	if (legacy)
+		return EXIT_FAILURE;
+
 	if (type == IH_TYPE_FLATDT)
 		return EXIT_SUCCESS;
 	else
diff --git a/tools/mkimage.c b/tools/mkimage.c
index 6d029afab3a8..9e9edd65583e 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -91,6 +91,7 @@ static void usage(const char *msg)
 	fprintf(stderr,
 		"       %s [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image\n"
 		"          -A ==> set architecture to 'arch'\n"
+		"          -L ==> force legacy image\n"
 		"          -O ==> set operating system to 'os'\n"
 		"          -T ==> set image type to 'type'\n"
 		"          -C ==> set compression type 'comp'\n"
@@ -159,7 +160,7 @@ static int add_content(int type, const char *fname)
 }
 
 static const char optstring[] =
-	"a:A:b:B:c:C:d:D:e:Ef:Fg:G:i:k:K:ln:N:o:O:p:qrR:stT:vVx";
+	"a:A:b:B:c:C:d:D:e:Ef:Fg:G:i:k:K:Lln:N:o:O:p:qrR:stT:vVx";
 
 static const struct option longopts[] = {
 	{ "load-address", required_argument, NULL, 'a' },
@@ -181,6 +182,7 @@ static const struct option longopts[] = {
 	{ "key-dir", required_argument, NULL, 'k' },
 	{ "key-dest", required_argument, NULL, 'K' },
 	{ "list", no_argument, NULL, 'l' },
+	{ "legacy", no_argument, NULL, 'L' },
 	{ "config", required_argument, NULL, 'n' },
 	{ "engine", required_argument, NULL, 'N' },
 	{ "algo", required_argument, NULL, 'o' },
@@ -298,6 +300,9 @@ static void process_args(int argc, char **argv)
 		case 'l':
 			params.lflag = 1;
 			break;
+		case 'L':
+			params.Lflag = 1;
+			break;
 		case 'n':
 			params.imagename = optarg;
 			break;
-- 
2.35.1