74 lines
2.5 KiB
Plaintext
74 lines
2.5 KiB
Plaintext
|
# SPDX-License-Identifier: GPL-2.0-only
|
|||
|
|
menuconfig MTD_SPI_NOR
|
|||
|
|
tristate "SPI NOR device support"
|
|||
|
|
depends on MTD
|
|||
|
|
depends on MTD && SPI_MASTER
|
|||
|
|
select SPI_MEM
|
|||
|
|
help
|
|||
|
|
This is the framework for the SPI NOR which can be used by the SPI
|
|||
|
|
device drivers and the SPI NOR device driver.
|
|||
|
|
|
|||
|
|
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).
|
|||
|
|
|
|||
|
|
choice
|
|||
|
|
prompt "Software write protection at boot"
|
|||
|
|
default MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE
|
|||
|
|
|
|||
|
|
config MTD_SPI_NOR_SWP_DISABLE
|
|||
|
|
bool "Disable SWP on any flashes (legacy behavior)"
|
|||
|
|
help
|
|||
|
|
This option disables the software write protection on any SPI
|
|||
|
|
flashes at boot-up.
|
|||
|
|
|
|||
|
|
Depending on the flash chip this either clears the block protection
|
|||
|
|
bits or does a "Global Unprotect" command.
|
|||
|
|
|
|||
|
|
Don't use this if you intent to use the software write protection
|
|||
|
|
of your SPI flash. This is only to keep backwards compatibility.
|
|||
|
|
|
|||
|
|
config MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE
|
|||
|
|
bool "Disable SWP on flashes w/ volatile protection bits"
|
|||
|
|
help
|
|||
|
|
Some SPI flashes have volatile block protection bits, ie. after a
|
|||
|
|
power-up or a reset the flash is software write protected by
|
|||
|
|
default.
|
|||
|
|
|
|||
|
|
This option disables the software write protection for these kind
|
|||
|
|
of flashes while keeping it enabled for any other SPI flashes
|
|||
|
|
which have non-volatile write protection bits.
|
|||
|
|
|
|||
|
|
If the software write protection will be disabled depending on
|
|||
|
|
the flash either the block protection bits are cleared or a
|
|||
|
|
"Global Unprotect" command is issued.
|
|||
|
|
|
|||
|
|
If you are unsure, select this option.
|
|||
|
|
|
|||
|
|
config MTD_SPI_NOR_SWP_KEEP
|
|||
|
|
bool "Keep software write protection as is"
|
|||
|
|
help
|
|||
|
|
If you select this option the software write protection of any
|
|||
|
|
SPI flashes will not be changed. If your flash is software write
|
|||
|
|
protected or will be automatically software write protected after
|
|||
|
|
power-up you have to manually unlock it before you are able to
|
|||
|
|
write to it.
|
|||
|
|
|
|||
|
|
endchoice
|
|||
|
|
|
|||
|
|
source "drivers/mtd/spi-nor/controllers/Kconfig"
|
|||
|
|
|
|||
|
|
endif # MTD_SPI_NOR
|