README: Add CONFIG_SPI_FLASH_DATAFLASH description

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 82706a411078f320a8cbd7ff0f56e1d8a00cd9d8..8ea30e2fabfc526c863c198321516e15eb8b6ef0 100644 (file)
--- a/README
+++ b/README
@@ -3211,6 +3211,20 @@ CBFS (Coreboot Filesystem) support
                memories can be connected with a given cs line.
                Currently Xilinx Zynq qspi supports these type of connections.
 
+               CONFIG_SPI_FLASH_MTD            spi-flash MTD layer
+
+               Define this option to use mtd support for spi flash layer, this
+               adapter is for translating mtd_read/mtd_write commands into
+               spi_flash_read/spi_flash_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.
+
+               CONFIG_SPI_FLASH_DATAFLASH      SPI based Dataflash
+
+               Define this option to access AT45xxx Dataflash chips support
+               using spi flash interface.
+
 - SystemACE Support:
                CONFIG_SYSTEMACE