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Buildroot FAQ

Last modified by Microchip on 2025/03/10 12:17

What are the prerequisites to use jffs2 root filesystem?

A: You should enable the following kernel config

Memory Technology Device (MTD) support
 |
 +--MTD partitioning support
    Command line partition table parsing
    NAND Device Support
       |
       +--Support for NAND Flash / SmartMedia on AT91
          ECC management for NAND Flash / SmartMedia on AT91 (Software ECC)
File systems
 |
 +--Miscellaneous filesystems
     |
     +--Journalling Flash File System v2 (JFFS2) support

Set the variable bootargs to pass Linux kernel boot argument "command line" in u-boot:

setenv bootargs 'mem=64M console=ttyS0,115200 root=/dev/name_of_block_device rw rootfstype=jffs2'

What are the prerequisites to use cramfs root filesystem?

A: You should enable the following kernel config

File systems
 |
 +--Miscellaneous filesystems
       |
      +--Compressed ROM file system support (cramfs)

Set the variable bootargs to pass Linux kernel boot argument "command line" in u-boot:

setenv bootargs 'mem=64M console=ttyS0,115200 initrd=0x21100000,17000000 ramdisk_size=15360 root=/dev/ram0'

What are the prerequisites to use ext2 root filesystem?

A: You should enable the following kernel config

File systems
 |
 +--Second extended fs support

Set the variable bootargs to pass Linux kernel boot argument "command line" in u-boot:

setenv bootargs 'mem=64M console=ttyS0,115200 root=/dev/name_of_block_device rw rootfstype=ext2'