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config BLK
bool "Support block devices"
depends on DM
default y if DM_MMC
help
Enable support for block devices, such as SCSI, MMC and USB
flash sticks. These provide a block-level interface which permits
reading, writing and (in some cases) erasing blocks. Block
devices often have a partition table which allows the device to
be partitioned into several areas, called 'partitions' in U-Boot.
A filesystem can be placed in each partition.
config SCSI
bool "Support SCSI controllers"
help
This enables support for SCSI (Small Computer System Interface),
a parallel interface widely used with storage peripherals such as
hard drives and optical drives. The SCSI standards define physical
interfaces as well as protocols for controlling devices and
tranferring data.
config DM_SCSI
bool "Support SCSI controllers with driver model"
depends on BLK
help
This option enables the SCSI (Small Computer System Interface) uclass
which supports SCSI and SATA HDDs. For every device configuration
(IDs/LUNs) a block device is created with RAW read/write and
filesystem support.
config BLOCK_CACHE
bool "Use block device cache"
default n
help
This option enables a disk-block cache for all block devices.
This is most useful when accessing filesystems under U-Boot since
it will prevent repeated reads from directory structures and other
filesystem data structures.
config IDE
bool "Support IDE controllers"
help
Enables support for IDE (Integrated Drive Electronics) hard drives.
This allows access to raw blocks and filesystems on an IDE drive
from U-Boot. See also CMD_IDE which provides an 'ide' command for
performing various IDE operations.
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