flash: Add optional verify-after-write feature

[people/ms/u-boot.git] / README

diff --git a/README b/README
index 0bc0af570062451f195a7e01dbb387048d1c134b..862bb3e6c12d43d3c93eead4d772dd1f8d9eca68 100644 (file)
--- a/README
+++ b/README
@@ -3248,6 +3248,15 @@ Configuration Settings:
                digits and dots.  Recommended value: 45 (9..1) for 80
                column displays, 15 (3..1) for 40 column displays.
 
+- CONFIG_FLASH_VERIFY
+               If defined, the content of the flash (destination) is compared
+               against the source after the write operation. An error message
+               will be printed when the contents are not identical.
+               Please note that this option is useless in nearly all cases,
+               since such flash programming errors usually are detected earlier
+               while unprotecting/erasing/programming. Please only enable
+               this option if you really know what you are doing.
+
 - CONFIG_SYS_RX_ETH_BUFFER:
                Defines the number of Ethernet receive buffers. On some
                Ethernet controllers it is recommended to set this value