[U-Boot] [PATCH v10 07/27] mtd: spi-nor: Kconfig: Add MTD_SPI_NOR_USE_4K_SECTORS

Jagan Teki
2017-12-28T06:12:13Z

Added CONFIG_MTD_SPI_NOR_USE_4K_SECTORS kconfig entry

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.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 Ã— 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