Partitioning SPI NOR flash

pt — Fri, 31 Oct 2014 04:56:56 GMT

I want to partition N25Q128 SPI nor flash. I don't know how to do that.

If anyone aware of it,then please help me to partition the spi flash as mtd0,mtd1,and mtd2.

Board : MCIMX28EVK

Linux Kernel version :2.6.35

Linux BSP : L2.6.35_1.1.0_130130_source

SPI flash : N25Q128

I need to store bootloader,uImage and rootfs in spi.

Regards

Pt A R

Re: Partitioning SPI NOR flash

victorien — Fri, 31 Oct 2014 09:01:29 GMT

Hi,

With bootloader do you use ? u-boot or barebox ?

On linux, to add partition on this memory you have to do something like that on mx28evk.c :

#if defined(CONFIG_MTD_M25P80) || defined(CONFIG_MTD_M25P80_MODULE)
static struct mtd_partition mx28evk_flash_part[] = {
    {
    .name = "bootloader",
    .offset = 0,
    .size = 2 * 1024 * 1024},
    //.mask_flags = MTD_WRITEABLE}, /* read only partition */
    {
    .name = "env",
    .offset = MTDPART_OFS_NXTBLK,
    .size = MTDPART_SIZ_FULL},
    //.mask_flags = MTD_WRITEABLE}, /* read only partition */
};
static struct flash_platform_data mx28_spi_flash_data = {
    .name = "m25p80",
    .parts = mx28evk_flash_part,
    .nr_parts = ARRAY_SIZE(mx28evk_flash_part),
    .type = "m25p32",
};
#endif

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