UM0851 datasheet(150/245 Pages) STMICROELECTRONICS

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Non-volatile memory device drivers

UM0851

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Doc ID 16604 Rev 2

Figure 39.

NOR memory performance

5.3.7

Configuration options

Table 42.

Serial NOR menuconfig options

Configuration option

Comment

CONFIG_MTD_NOR_SPEAR

This option is used to enable the NOR driver

support

CONFIG_MTD_PARTITIONS

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

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.

CONFIG_MTD_BLOCK

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.

UM0851 Datasheet(PDF) 150 Page - STMicroelectronics