[U-Boot] [PATCH v4 13/13] fit: make sha256 support optional

[dirk.eibach at gdsys.cc]

From: Dirk Eibach <dirk.eibach at gdsys.cc>

sha256 has some beefy memory footprint.
Make it optional for constrained systems.


Signed-off-by: Dirk Eibach <dirk.eibach at gdsys.cc>
---

Changes in v4:
- describe CONFIG_FIT_DISABLE_SHA256 in README

Changes in v3: None
Changes in v2:
- make sha256 support optional

 README                         | 5 +++++
 include/configs/dlvision-10g.h | 1 +
 include/configs/io.h           | 1 +
 include/configs/iocon.h        | 1 +
 include/configs/neo.h          | 1 +
 include/image.h                | 5 +++++
 6 files changed, 14 insertions(+)

diff --git a/README b/README
index 1fc8f00..61c66cb 100644
--- a/README
+++ b/README
@@ -3249,6 +3249,11 @@ FIT uImage format:
 		disabled. If a board need legacy image format support
 		enable this through CONFIG_IMAGE_FORMAT_LEGACY
 
+		CONFIG_FIT_DISABLE_SHA256
+		Supporting SHA256 hashes has quite an impact on binary size.
+		For constrained systems sha256 hash support can be disabled
+		with this option.
+
 - Standalone program support:
 		CONFIG_STANDALONE_LOAD_ADDR
 
diff --git a/include/configs/dlvision-10g.h b/include/configs/dlvision-10g.h
index 2567a22..6153a40 100644
--- a/include/configs/dlvision-10g.h
+++ b/include/configs/dlvision-10g.h
@@ -40,6 +40,7 @@
 /* new uImage format support */
 #define CONFIG_FIT
 #define CONFIG_FIT_VERBOSE	/* enable fit_format_{error,warning}() */
+#define CONFIG_FIT_DISABLE_SHA256
 
 #define CONFIG_ENV_IS_IN_FLASH	/* use FLASH for environment vars */
 
diff --git a/include/configs/io.h b/include/configs/io.h
index 649c0fb..8e32c25 100644
--- a/include/configs/io.h
+++ b/include/configs/io.h
@@ -40,6 +40,7 @@
 /* new uImage format support */
 #define CONFIG_FIT
 #define CONFIG_FIT_VERBOSE	/* enable fit_format_{error,warning}() */
+#define CONFIG_FIT_DISABLE_SHA256
 
 #define CONFIG_ENV_IS_IN_FLASH	/* use FLASH for environment vars */
 
diff --git a/include/configs/iocon.h b/include/configs/iocon.h
index 35ba1bd..ae05bcb 100644
--- a/include/configs/iocon.h
+++ b/include/configs/iocon.h
@@ -39,6 +39,7 @@
 /* new uImage format support */
 #define CONFIG_FIT
 #define CONFIG_FIT_VERBOSE	/* enable fit_format_{error,warning}() */
+#define CONFIG_FIT_DISABLE_SHA256
 
 #define CONFIG_ENV_IS_IN_FLASH	/* use FLASH for environment vars */
 
diff --git a/include/configs/neo.h b/include/configs/neo.h
index 75dc862..4937730 100644
--- a/include/configs/neo.h
+++ b/include/configs/neo.h
@@ -37,6 +37,7 @@
 /* new uImage format support */
 #define CONFIG_FIT
 #define CONFIG_FIT_VERBOSE	/* enable fit_format_{error,warning}() */
+#define CONFIG_FIT_DISABLE_SHA256
 
 #define CONFIG_ENV_IS_IN_FLASH	/* use FLASH for environment vars */
 
diff --git a/include/image.h b/include/image.h
index b71e4ba..61d5885 100644
--- a/include/image.h
+++ b/include/image.h
@@ -72,6 +72,11 @@ struct lmb;
 #  define IMAGE_ENABLE_SHA256	1
 # endif
 
+#ifdef CONFIG_FIT_DISABLE_SHA256
+#undef CONFIG_SHA256
+#undef IMAGE_ENABLE_SHA256
+#endif
+
 #ifndef IMAGE_ENABLE_CRC32
 #define IMAGE_ENABLE_CRC32	0
 #endif
-- 
1.8.3