[U-Boot] [PATCH v9 04/21] mtd: spi-nor: Kconfig: Add MTD_SPI_NOR_USE_4K_SECTORS

[Jagan Teki <jagan@openedev.com>]

Added CONFIG_MTD_SPI_NOR_USE_4K_SECTORS kconfig entry

Signed-off-by: Jagan Teki <jagan@openedev.com>
---
 drivers/mtd/spi-nor/Kconfig | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index 130b0a4..40cd5ba 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -12,3 +12,21 @@ menuconfig MTD_SPI_NOR
 	  as a common core framework between the generic SPI controller drivers vs
 	  SPI-NOR controller drivers for SPI-NOR device access. Note that from SPI-NOR
 	  core to SPI drivers there should be an interface layer.
+
+if MTD_SPI_NOR
+
+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
-- 
2.7.4