mkimage: Explain the auto-fit imagefile special case

There is a special case in the code when auto-fit is used. Add a comment to
make it easier to understand why this is needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/tools/mkimage.c b/tools/mkimage.c
index 53fa8bb3a8f048a6f9516780218ac18b00d57a40..66d29abbb0eada7e06e13baa643b9bd38c093ed0 100644 (file)
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -273,6 +273,7 @@ static void process_args(int argc, char **argv)
         */
        if (params.type == IH_TYPE_FLATDT) {
                params.fit_image_type = type ? type : IH_TYPE_KERNEL;
+               /* For auto_its, datafile is always 'auto' */
                if (!params.auto_its)
                        params.datafile = datafile;
        } else if (type != IH_TYPE_INVALID) {