Added kconfig entry for MTD_DATAFLASH_WRITE_VERIFY

Cc: Bin Meng <bmeng...@gmail.com>
Cc: Simon Glass <s...@chromium.org>
Cc: York Sun <york....@nxp.com>
Cc: Haikun Wang <haikun.w...@freescale.com>
Signed-off-by: Jagan Teki <jt...@openedev.com>
---
 drivers/mtd/spi-nor/Kconfig | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index 15e8432..f039a9d 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -112,3 +112,13 @@ config MTD_DATAFLASH
          protocols during enumeration.
 
          If unsure, say N
+
+config MTD_DATAFLASH_WRITE_VERIFY
+       bool "Verify DataFlash page writes"
+       depends on MTD_DATAFLASH
+       help
+         This adds an extra check when data is written to the flash.
+         It may help if you are verifying chip setup (timings etc) on
+         your board.  There is a rare possibility that even though the
+         device thinks the write was successful, a bit could have been
+         flipped accidentally due to device wear or something else.
-- 
1.9.1

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