UM0851 Datasheet, PDF (150/245 Pages) STMicroelectronics – SPEAr is a family of highly customizable ARM-based embedded

Non-volatile memory device drivers
Figure 39. NOR memory performance
UM0851
5.3.7
Configuration options
Table 42. Serial NOR menuconfig options
Configuration option
Comment
CONFIG_MTD_NOR_SPEAR
CONFIG_MTD_PARTITIONS
This option is used to enable the NOR driver
support
This option enables multiple 'partitions', each of
which appears to the user as a separate MTD
device
CONFIG_MTD_CMDLINE_PARTS
This option will make the driver to look for
command line dynamic partition. If not found then
driver will go for static partition.
CONFIG_MTD_CONCAT
Support for concatenating several MTD devices
into a single (virtual) one. This allows you to have
-for example- a JFFS2 file system spanning
multiple physical Flash chips.
CONFIG_MTD_CHAR
CONFIG_MTD_BLOCK
This provides a character device for each MTD
device present in the system, allowing the user to
read and write directly to the memory chips, and
also use ioctl() to obtain information about the
device, or to erase parts of it.
Although most Flash chips have an erase size too
large to be useful as block devices, it is possible
to use MTD devices which are based on RAM
chips in this manner. This block device is a user
of MTD devices performing that function.
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