menu "SPI Flash Support" config DM_SPI_FLASH bool "Enable Driver Model for SPI flash" depends on DM && DM_SPI help Enable driver model for SPI flash. This SPI flash interface (spi_flash_probe(), spi_flash_write(), etc.) is then implemented by the SPI flash uclass. There is one standard SPI flash driver which knows how to probe most chips supported by U-Boot. The uclass interface is defined in include/spi_flash.h, but is currently fully compatible with the old interface to avoid confusion and duplication during the transition parent. SPI and SPI flash must be enabled together (it is not possible to use driver model for one and not the other). config SPI_FLASH_SANDBOX bool "Support sandbox SPI flash device" depends on SANDBOX && DM_SPI_FLASH help Since sandbox cannot access real devices, an emulation mechanism is provided instead. Drivers can be connected up to the sandbox SPI bus (see CONFIG_SANDBOX_SPI) and SPI traffic will be routed to this device. Typically the contents of the emulated SPI flash device is stored in a file on the host filesystem. config SPI_FLASH bool "Legacy SPI Flash Interface support" help Enable the legacy SPI flash support. This will include basic standard support for things like probing, read / write, and erasing through cmd_sf interface. If unsure, say N config SPI_FLASH_BAR bool "SPI flash Bank/Extended address register support" depends on SPI_FLASH help Enable the SPI flash Bank/Extended address register support. Bank/Extended address registers are used to access the flash which has size > 16MiB in 3-byte addressing. if SPI_FLASH config SPI_FLASH_ATMEL bool "Atmel SPI flash support" help Add support for various Atmel SPI flash chips (AT45xxx and AT25xxx) config SPI_FLASH_EON bool "EON SPI flash support" help Add support for various EON SPI flash chips (EN25xxx) config SPI_FLASH_GIGADEVICE bool "GigaDevice SPI flash support" help Add support for various GigaDevice SPI flash chips (GD25xxx) config SPI_FLASH_MACRONIX bool "Macronix SPI flash support" help Add support for various Macronix SPI flash chips (MX25Lxxx) config SPI_FLASH_SPANSION bool "Spansion SPI flash support" help Add support for various Spansion SPI flash chips (S25FLxxx) config SPI_FLASH_STMICRO bool "STMicro SPI flash support" help Add support for various STMicro SPI flash chips (M25Pxxx and N25Qxxx) config SPI_FLASH_SST bool "SST SPI flash support" help Add support for various SST SPI flash chips (SST25xxx) config SPI_FLASH_WINBOND bool "Winbond SPI flash support" help Add support for various Winbond SPI flash chips (W25xxx) endif config SPI_FLASH_USE_4K_SECTORS bool "Use small 4096 B erase sectors" depends on SPI_FLASH 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_FLASH_DATAFLASH bool "AT45xxx DataFlash support" depends on SPI_FLASH && DM_SPI_FLASH help Enable the access for SPI-flash-based AT45xxx DataFlash chips. DataFlash is a kind of SPI flash. Most AT45 chips have two buffers in each chip, which may be used for double buffered I/O; but this driver doesn't (yet) use these for any kind of i/o overlap or prefetching. Sometimes DataFlash is packaged in MMC-format cards, although the MMC stack can't (yet?) distinguish between MMC and DataFlash protocols during enumeration. If unsure, say N config SPI_FLASH_MTD bool "SPI Flash MTD support" depends on SPI_FLASH help Enable the MTD support for spi flash layer, this adapter is for translating mtd_read/mtd_write commands into spi_flash_read/write commands. It is not intended to use it within sf_cmd or the SPI flash subsystem. Such an adapter is needed for subsystems like UBI which can only operate on top of the MTD layer. If unsure, say N endmenu # menu "SPI Flash Support"