74 lines
2.5 KiB
Plaintext
74 lines
2.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig MTD_SPI_NOR
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tristate "SPI NOR device support"
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depends on MTD
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depends on MTD && SPI_MASTER
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select SPI_MEM
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help
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This is the framework for the SPI NOR which can be used by the SPI
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device drivers and the SPI NOR device driver.
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if MTD_SPI_NOR
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config MTD_SPI_NOR_USE_4K_SECTORS
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bool "Use small 4096 B erase sectors"
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default y
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help
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Many flash memories support erasing small (4096 B) sectors. Depending
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on the usage this feature may provide performance gain in comparison
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to erasing whole blocks (32/64 KiB).
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Changing a small part of the flash's contents is usually faster with
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small sectors. On the other hand erasing should be faster when using
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64 KiB block instead of 16 × 4 KiB sectors.
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Please note that some tools/drivers/filesystems may not work with
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4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
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choice
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prompt "Software write protection at boot"
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default MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE
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config MTD_SPI_NOR_SWP_DISABLE
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bool "Disable SWP on any flashes (legacy behavior)"
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help
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This option disables the software write protection on any SPI
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flashes at boot-up.
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Depending on the flash chip this either clears the block protection
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bits or does a "Global Unprotect" command.
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Don't use this if you intent to use the software write protection
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of your SPI flash. This is only to keep backwards compatibility.
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config MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE
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bool "Disable SWP on flashes w/ volatile protection bits"
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help
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Some SPI flashes have volatile block protection bits, ie. after a
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power-up or a reset the flash is software write protected by
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default.
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This option disables the software write protection for these kind
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of flashes while keeping it enabled for any other SPI flashes
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which have non-volatile write protection bits.
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If the software write protection will be disabled depending on
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the flash either the block protection bits are cleared or a
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"Global Unprotect" command is issued.
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If you are unsure, select this option.
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config MTD_SPI_NOR_SWP_KEEP
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bool "Keep software write protection as is"
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help
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If you select this option the software write protection of any
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SPI flashes will not be changed. If your flash is software write
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protected or will be automatically software write protected after
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power-up you have to manually unlock it before you are able to
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write to it.
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endchoice
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source "drivers/mtd/spi-nor/controllers/Kconfig"
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endif # MTD_SPI_NOR
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