bootm: make use of legacy image format configurable

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 256d6ecc65a09c008bdd8a431fbec1aea37e7ac5..a248ab5d39fc85438ba4adc6ffd0141a5dffd99c 100644 (file)
--- a/README
+++ b/README
@@ -3200,6 +3200,19 @@ FIT uImage format:
  -150  common/cmd_nand.c       Incorrect FIT image format
   151  common/cmd_nand.c       FIT image format OK
 
+- legacy image format:
+               CONFIG_IMAGE_FORMAT_LEGACY
+               enables the legacy image format support in U-Boot.
+
+               Default:
+               enabled if CONFIG_FIT_SIGNATURE is not defined.
+
+               CONFIG_DISABLE_IMAGE_LEGACY
+               disable the legacy image format
+
+               This define is introduced, as the legacy image format is
+               enabled per default for backward compatibility.
+
 - FIT image support:
                CONFIG_FIT
                Enable support for the FIT uImage format.
@@ -3216,6 +3229,11 @@ FIT uImage format:
                using a hash signed and verified using RSA. See
                doc/uImage.FIT/signature.txt for more details.
 
+               WARNING: When relying on signed FIT images with required
+               signature check the legacy image format is default
+               disabled. If a board need legacy image format support
+               enable this through CONFIG_IMAGE_FORMAT_LEGACY
+
 - Standalone program support:
                CONFIG_STANDALONE_LOAD_ADDR