Support for redundant environment in NAND Flash.
diff --git a/include/environment.h b/include/environment.h
index bb10964..422f800 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -69,6 +69,18 @@
# endif
#endif /* CFG_ENV_IS_IN_FLASH */
+#if defined(CFG_ENV_IS_IN_NAND)
+# ifndef CFG_ENV_OFFSET
+# error "Need to define CFG_ENV_OFFSET when using CFG_ENV_IS_IN_NAND"
+# endif
+# ifndef CFG_ENV_SIZE
+# error "Need to define CFG_ENV_SIZE when using CFG_ENV_IS_IN_NAND"
+# endif
+# ifdef CFG_ENV_OFFSET_REDUND
+# define CFG_REDUNDAND_ENVIRONMENT
+# endif
+#endif /* CFG_ENV_IS_IN_NAND */
+
#ifdef CFG_REDUNDAND_ENVIRONMENT
# define ENV_HEADER_SIZE (sizeof(unsigned long) + 1)
