Support for redundant environment in NAND Flash.
diff --git a/README b/README
index 6f61008..4442149 100644
--- a/README
+++ b/README
@@ -1946,6 +1946,17 @@
These two #defines specify the offset and size of the environment
area within the first NAND device.
+ - CFG_ENV_OFFSET_REDUND
+
+ This setting describes a second storage area of CFG_ENV_SIZE
+ size used to hold a redundant copy of the environment data,
+ so that there is a valid backup copy in case there is a
+ power failure during a "saveenv" operation.
+
+ Note: CFG_ENV_OFFSET and CFG_ENV_OFFSET_REDUND must be aligned
+ to a block boundary, and CFG_ENV_SIZE must be a multiple of
+ the NAND devices block size.
+
- CFG_SPI_INIT_OFFSET
Defines offset to the initial SPI buffer area in DPRAM. The