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authorAntony Pavlov <antonynpavlov@gmail.com>2017-04-26 17:17:34 +0300
committerSascha Hauer <s.hauer@pengutronix.de>2017-10-16 09:24:42 +0200
commitbdcb3b0505e785e1b3264dab5fc23539ce201fe8 (patch)
tree12cae58ffc625329fbbca6f7e040f75f48455fb5
parent81d6f55f4d05c781d77751f577ed488a314b4bb9 (diff)
downloadbarebox-bdcb3b0505e785e1b3264dab5fc23539ce201fe8.tar.gz
mtd: m25p80: make it possible to use 4K erase block
We already have the MTD_SPI_NOR_USE_4K_SECTORS option handling in C code for 4K erase block support. Alas this 4K erase block support code can't be used because the MTD_SPI_NOR_USE_4K_SECTORS option support is missed in Kconfig. This patch imports necessary Kconfig MTD_SPI_NOR_USE_4K_SECTORS option declaration from linux v4.11-rc8. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--drivers/mtd/spi-nor/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index a84591f..51cebcf 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -7,6 +7,19 @@ menuconfig MTD_SPI_NOR
if MTD_SPI_NOR
+config MTD_SPI_NOR_USE_4K_SECTORS
+ bool "Use small 4096 B erase sectors"
+ 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).
+
config SPI_CADENCE_QUADSPI
tristate "Cadence Quad SPI controller"
help