Instead of defining a static partition map as described in section
Memory Technology Devices you can define the partitions
for your flash memory at boot time using command line arguments.
To do that you have to enable the
CONFIG_MTD_CMDLINE_PARTS kernel configuration option.
With this option enabled, the kernel will recognize a command line argument
mtdparts
and decode it as follows:
mtdparts=<mtddef>[;<mtddef]
<mtddef> := <mtd-id>:<partdef>[,<partdef>]
<partdef> := <size>[@offset][<name>][ro]
<mtd-id> := unique id used in mapping driver/device (number of flash bank)
<size> := standard linux memsize OR "-" to denote all remaining space
<name> := '(' NAME ')'
For example, instead of using a static partition map like this:
0x00000000-0x00060000 : "U-Boot"
0x00060000-0x00080000 : "Environment 1"
0x00080000-0x000A0000 : "Environment 2"
0x000A0000-0x000C0000 : "ASIC Images"
0x000C0000-0x001C0000 : "Linux Kernel"
0x001C0000-0x005C0000 : "Ramdisk Image"
0x005C0000-0x01000000 : "User Data"
you can pass a command line argument as follows:
mtdparts=0:384k(U-Boot),128k(Env1),128k(Env2),128k(ASIC),1M(Linux),4M(Ramdisk),-(User_Data)
