[PATCH] mtd: m25p80: make it possible to use 4K erase block
From: Antony Pavlov <hidden>
Date: 2017-04-26 14:18:06
Subsystem:
memory technology devices (mtd), spi nor subsystem, the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Pratyush Yadav, Michael Walle, Linus Torvalds
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 <redacted> --- 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 a84591fdd1..8ede3c90be 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig@@ -7,6 +7,20 @@ menuconfig MTD_SPI_NOR 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). + config SPI_CADENCE_QUADSPI tristate "Cadence Quad SPI controller" help
--
2.11.0
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