diff options
Diffstat (limited to 'drivers/mtd/spi-nor/Kconfig')
| -rw-r--r-- | drivers/mtd/spi-nor/Kconfig | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig new file mode 100644 index 000000000..24cd25de2 --- /dev/null +++ b/drivers/mtd/spi-nor/Kconfig @@ -0,0 +1,73 @@ +# 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 |