menu "MTD Support" config MTD_PARTITIONS bool config MTD bool "Enable MTD layer" help Enable the MTD stack, necessary to interact with NAND, NOR, SPI-NOR, SPI-NAND, OneNAND, etc. config DM_MTD bool "Enable Driver Model for MTD drivers" depends on DM help Enable driver model for Memory Technology Devices (MTD), such as flash, RAM and similar chips, often used for solid state file systems on embedded devices. config MTD_NOR_FLASH bool "Enable parallel NOR flash support" help Enable support for parallel NOR flash. config MTD_CONCAT bool "Enable MTD device concatenation" depends on MTD help Enable support for concatenating multiple physical MTD devices into a single logical device. The larger logical device can then be partitioned. config SYS_MTDPARTS_RUNTIME bool "Allow MTDPARTS to be configured at runtime" depends on MTD help This option allows to call the function board_mtdparts_default to dynamically build the variables mtdids and mtdparts at runtime. config FLASH_CFI_DRIVER bool "Enable CFI Flash driver" select USE_SYS_MAX_FLASH_BANKS help The Common Flash Interface specification was developed by Intel, AMD and other flash manufactures. It provides a universal method for probing the capabilities of flash devices. If you wish to support any device that is CFI-compliant, you need to enable this option. Visit for more information on CFI. choice prompt "Data-width of the flash device" depends on FLASH_CFI_DRIVER default SYS_FLASH_CFI_WIDTH_8BIT config SYS_FLASH_CFI_WIDTH_8BIT bool "Data-width of the device is 8-bit" config SYS_FLASH_CFI_WIDTH_16BIT bool "Data-width of the device is 16-bit" config SYS_FLASH_CFI_WIDTH_32BIT bool "Data-width of the device is 32-bit" config SYS_FLASH_CFI_WIDTH_64BIT bool "Data-width of the device is 64-bit" endchoice config SYS_FLASH_CFI_WIDTH hex depends on FLASH_CFI_DRIVER default 0x1 if SYS_FLASH_CFI_WIDTH_8BIT default 0x2 if SYS_FLASH_CFI_WIDTH_16BIT default 0x4 if SYS_FLASH_CFI_WIDTH_32BIT default 0x8 if SYS_FLASH_CFI_WIDTH_64BIT help This must be kept in sync with the table in include/flash.h config FLASH_SHOW_PROGRESS int "Print out a countdown durinng writes" depends on FLASH_CFI_DRIVER default 45 help If set to a non-zero value, print out countdown digits and dots. Recommended value: 45 (9..1) for 80 column displays, 15 (3..1) for 40 column displays. config CFI_FLASH bool "Enable Driver Model for CFI Flash driver" depends on DM_MTD select FLASH_CFI_DRIVER help The Common Flash Interface specification was developed by Intel, AMD and other flash manufactures. It provides a universal method for probing the capabilities of flash devices. If you wish to support any device that is CFI-compliant, you need to enable this option. Visit for more information on CFI. config CFI_FLASH_USE_WEAK_ACCESSORS bool "Allow read/write functions to be overridden" depends on FLASH_CFI_DRIVER help Enable this option to allow for the flash_{read,write}{8,16,32,64} functions to be overridden by the platform. config SYS_CFI_FLASH_STATUS_POLL bool "Poll status on AMD flash chips" depends on FLASH_CFI_DRIVER config SYS_FLASH_USE_BUFFER_WRITE bool "Enable buffered writes to flash" depends on FLASH_CFI_DRIVER help Use buffered writes to flash. config SYS_FLASH_EMPTY_INFO bool "Enable displaying empty sectors in flash info" depends on FLASH_CFI_DRIVER config FLASH_SPANSION_S29WS_N bool "Non-standard s29ws-n MirrorBit flash" depends on FLASH_CFI_DRIVER help Enable this if the s29ws-n MirrorBit flash has non-standard addresses for buffered write commands. config FLASH_CFI_MTD bool "Enable CFI MTD driver" depends on FLASH_CFI_DRIVER && MTD help This option enables the building of the cfi_mtd driver in the drivers directory. The driver exports CFI flash to the MTD layer. config SYS_FLASH_PROTECTION bool "Use hardware flash protection" depends on FLASH_CFI_DRIVER help If defined, hardware flash sectors protection is used instead of U-Boot software protection. config SYS_FLASH_CFI bool "Define extra elements in CFI for flash geometry" depends on FLASH_CFI_DRIVER help Define if the flash driver uses extra elements in the common flash structure for storing flash geometry. config SYS_FLASH_QUIET_TEST bool "Disable printing a warning about not recognizing some flash banks" depends on FLASH_CFI_DRIVER help If this option is enabled, the common CFI flash doesn't print it's warning upon not recognized FLASH banks. This is useful, if some of the configured banks are only optionally available. config SYS_FLASH_CHECKSUM bool "Compute and print flash CRC if 'flashchecksum' is set in the environment" depends on MTD_NOR_FLASH help If the variable flashchecksum is set in the environment, perform a CRC of the flash and print the value to console. config FLASH_VERIFY bool "Compare writes to NOR flash with source location" depends on MTD_NOR_FLASH help If enabled, the content of the flash (destination) is compared against the source after the write operation. An error message will be printed when the contents are not identical. Please note that this option is useless in nearly all cases, since such flash programming errors usually are detected earlier while unprotecting/erasing/programming. Please only enable this option if you really know what you are doing. config ALTERA_QSPI bool "Altera Generic Quad SPI Controller" depends on DM_MTD select USE_SYS_MAX_FLASH_BANKS help This enables access to Altera EPCQ/EPCS flash chips using the Altera Generic Quad SPI Controller. The controller converts SPI NOR flash to parallel flash interface. Please find details on the "Embedded Peripherals IP User Guide" of Altera. config RENESAS_RPC_HF bool "Renesas RCar Gen3 RPC HyperFlash driver" depends on RCAR_GEN3 && DM_MTD help This enables access to HyperFlash memory through the Renesas RCar Gen3 RPC controller. config HBMC_AM654 bool "HyperBus controller driver for AM65x SoC" depends on SYSCON help This is the driver for HyperBus controller on TI's AM65x and other SoCs config STM32_FLASH bool "STM32 MCU Flash driver" depends on ARCH_STM32 select USE_SYS_MAX_FLASH_BANKS help This is the driver of embedded flash for some STMicroelectronics STM32 MCU. config SYS_MAX_FLASH_SECT int "Maximumm number of sectors on a flash chip" depends on MTD_NOR_FLASH || FLASH_CFI_DRIVER default 512 config SAMSUNG_ONENAND bool "Samsung OneNAND driver support" config USE_SYS_MAX_FLASH_BANKS bool "Enable Max number of Flash memory banks" help When this option is enabled, the CONFIG_SYS_MAX_FLASH_BANKS will be defined. config SYS_MAX_FLASH_BANKS int "Max number of Flash memory banks" depends on USE_SYS_MAX_FLASH_BANKS default 1 help Max number of Flash memory banks using by the MTD framework, in the flash CFI driver and in some other driver to define the flash_info struct declaration. config SYS_MAX_FLASH_BANKS_DETECT bool "Detection of flash banks number in CFI driver" depends on CFI_FLASH && FLASH_CFI_DRIVER help This enables detection of number of flash banks in CFI driver, to reduce the effective number of flash bank, between 0 and CONFIG_SYS_MAX_FLASH_BANKS source "drivers/mtd/nand/Kconfig" config SYS_NAND_MAX_OOBFREE int "Maximum number of free OOB regions supported" depends on SAMSUNG_ONENAND || MTD_RAW_NAND range 2 32 default 32 help Set the maximum number of free OOB regions supported. Useful for reducing image size, especially with SPL. config SYS_NAND_MAX_ECCPOS int "Maximum number of ECC bytes supported" depends on SAMSUNG_ONENAND || MTD_RAW_NAND range 48 2147483647 default 680 help Set the maximum number of ECC bytes supported. Useful for reducing image size, especially with SPL. config SYS_NAND_MAX_CHIPS int "NAND max chips" depends on MTD_RAW_NAND || CMD_ONENAND || TARGET_S5PC210_UNIVERSAL || \ SPL_OMAP3_ID_NAND default 1 help The maximum number of NAND chips per device to be supported. source "drivers/mtd/spi/Kconfig" source "drivers/mtd/ubi/Kconfig" source "drivers/mtd/nvmxip/Kconfig" endmenu