How to partition NAND flash

How to partition NAND flash

[Terence Soh]

Hi,

I'm trying to get a 64 MByte nand flash to be partitioned in a 32MB 
cramfs and 32MB jffs2 partition.

I tried to do this in the kernel by

static struct mtd_partition partition_info[] = {
         [0] = {
                 .name   = "CRAM",
                 .offset = 0,
                 .size   = 32 * 1024 * 1024,
                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
         },
     [1] = {
                 .name   = "JFFS2",
                 .offset = 32 * 1024 * 1024,
                 .size   = MTDPART_SIZ_FULL,
     }
};

but when I cat/proc/mtd, I get
/ # cat /proc/mtd
dev:    size   erasesize  name
mtd0: 04000000 00004000 "rootfs"

so I realise that this is affected by the bootargs passed which is
"console=ttyS0 mtdparts=a9m9750:0x4000000@0(rootfs) root=mtdblock/0 
rootfstype=jffs2"

How should I passed the bootargs?

Thanks in advance,
Terence.