env: Add generic redundant environment implementation
All current environments that implement redundancy use almost
identical implementations. This patch implements the env_nand
implementation as a function in env_common, and updates the
env_export function to export an env_nand-style 'flags' field by
default.
Signed-off-by: Fiach Antaw <fiach.antaw@uqconnect.edu.au>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/environment.h b/include/environment.h
index 6f94986..d86230a 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -224,6 +224,11 @@
/* Export from hash table into binary representation */
int env_export(env_t *env_out);
+#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
+/* Select and import one of two redundant environments */
+int env_import_redund(const char *buf1, const char *buf2);
+#endif
+
#endif /* DO_DEPS_ONLY */
#endif /* _ENVIRONMENT_H_ */