[U-Boot] [PATCH v6 06/76] mtd: spi-nor: Add kconfig for MTD_SPI_NOR_USE_4K_SECTORS

Jagan Teki
2016-02-14T20:48:05Z

Added kconfig entry for MTD_SPI_NOR_USE_4K_SECTORS.

Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Jagan Teki <jteki@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