[U-Boot] [PATCH v7 06/87] mtd: spi-nor: Add kconfig for MTD_SPI_NOR_USE_4K_SECTORS

[Jagan Teki]

Added kconfig entry for MTD_SPI_NOR_USE_4K_SECTORS.

Cc: Simon Glass <sjg at chromium.org>
Cc: Bin Meng <bmeng.cn at gmail.com>
Cc: Mugunthan V N <mugunthanvnm at ti.com>
Cc: Michal Simek <michal.simek at xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur at xilinx.com>
Signed-off-by: Jagan Teki <jteki at openedev.com>
---
 drivers/mtd/spi-nor/Kconfig | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index f0ea9f9..374cdcb 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -30,4 +30,18 @@ config MTD_M25P80
 	  if you want to specify device partitioning or to use a device which
 	  doesn't support the JEDEC ID instruction.
 
+config MTD_SPI_NOR_USE_4K_SECTORS
+	bool "Use small 4096 B erase sectors"
+	default y
+	help
+	  Many flash memories support erasing small (4096 B) sectors. Depending
+	  on the usage this feature may provide performance gain in comparison
+	  to erasing whole blocks (32/64 KiB).
+	  Changing a small part of the flash's contents is usually faster with
+	  small sectors. On the other hand erasing should be faster when using
+	  64 KiB block instead of 16 × 4 KiB sectors.
+
+	  Please note that some tools/drivers/filesystems may not work with
+	  4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
+
 endif # MTD_SPI_NOR
-- 
1.9.1