Partitioning NAND flash

Brian Szmyd brian.szmyd at
Thu Sep 4 14:49:22 EDT 2008

I am having trouble determining where the partitioning information is
coming from when I boot into linux 2.6.26 for my haleakala reference
board from amcc. When linux boots I receive the following output from
the MTD driver:

fc000000.nor_flash: Found 1 x16 devices at 0x0 in 16-bit bank
 Amd/Fujitsu Extended Query Table at 0x0040
fc000000.nor_flash: CFI does not contain boot bank location. Assuming
number of CFI chips: 1
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
RedBoot partition parsing not available
Creating 5 MTD partitions on "fc000000.nor_flash":
0x00000000-0x001e0000 : "kernel"
0x001e0000-0x00200000 : "dtb"
0x00200000-0x00f60000 : "root"
0x03f60000-0x03fa0000 : "env"
0x03fa0000-0x04000000 : "u-boot"
NDFC NAND Driver initialized. Chip-Rev: 0x00000111
NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB
3,3V 8-bit)
Scanning device for bad blocks
Number of partitions 3
Creating 3 MTD partitions on "NAND 64MiB 3,3V 8-bit":
0x00000000-0x00060000 : "u-boot"
0x00060000-0x00068000 : "env"
0x00068000-0x04000000 : "content"

My problem is that I want to repartition the NAND flash, but am not sure
where the current partitioning scheme is coming from. My bootargs to the
kernel does not contain an mtdparts section and i don't see any
reference to a "u-boot", "env", "content" partition in the mtd driver
code itself.

I have setup my NOR partitioning by modifying the DTS provided by the
linux source, but there is nothing in there that refers to the NAND
chip. I have tried providing an mtdparts argument to the kernel but this
appears to be a no-op even though the appropriate option in the kernel
is configured.

I'm kind of at a loss after monkeying with this for the last couple
days. Any help or direction to a good source of information would be
greatly appreciated!

Brian Szmyd | brian.szmyd at

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