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How to create SPI NOR flash mtd partition in the u-boot

Ankur Tank
Expert 2985 points

Hi,

We are using BBB based custom board,
we have SPI NOR flash and NAND flash on the board,

After enabling SPI Nor flash support i want to create mtd partition for SPI NOR flash in the U-boot.
How do i create SPI NOr flash partition in the u-boot ?
I have tried follwoing but it didn't work,

#define MTDIDS_DEFAULT                  "nand0=omap2-nand.0, nor0=omap2-nor.0"
#define MTDPARTS_DEFAULT "mtdparts=omap2-nand.0:" \
 "128k(SPL)," \
 "128k(SPL.backup1)," \
 "128k(SPL.backup2)," \
 "128k(SPL.backup3)," \
 "1024k(u-boot)," \
 "1024k(u-boot.backup1)," \
 "128k(u-boot-env)," \
 "5m(kernel)," \
 "5m(kernel.backup1)," \
 "512k(fdt)," \
 "512k(fdt.backup1)," \
 "100m(rootfs)," \
 "100m(rootfs.backup1)," \
 "13m(reserved),"  \
 ";" \
 "mtdparts=omap2-nor.0:" \
 "128k(SPL1_nor)," \
 "128k(SPL2_nor)," \
 "128k(SPL3_nor)," \
 "128k(SPL4_nor)," \
 "512k(usr_nor)," \

mtd NAND partitions are working fine but nor partitions doesn't work
Any suggestions ?

Thank you,

Regards,
Ankur

  • 0
    TI__Guru** 116100 points

    Hi Ankur,

    Sorry for the delayed response on this.

    Able to get NAND partitions in u-boot command prompt ?

  • 0 in reply to Titusrathinaraj Stalin
    Expert 2985 points

    Hi Titus,

    Thank you for reply,

    Yes I am able to get NAND partition on the command prompt.
    But NOR partition doesn't work :(

    Is it possible to use the mtd devices in the u-boot code,
    i mean, can i write something like fd = open("/dev/mtd",O_WRONLY) and do read/write ?
    If that works  then i would use the same code in u-boot and kernel to write the bootflags to NOR user partition.

    Thank you,

    Regards,
    Ankur