AM335x EVM NAND Booting problem

Naveen,

NAVEEN RUNJALA said:

thanq so much finally i got that board is booting from nand..........the problem is in SW4.....i configured that as in your shared link.

It seems that in SW4 DIP ON switches are also labeled on the wrong side. And from the AM335x TRM (Table 26-7 SYSBOOT Configuration Pins) we have requirement sysboot[11:10] (correspond to SW4 [4:3]) must be 00 for NAND boot (SW4 [4:3] should be UP).

I will check about the root fs and come back to you with new post about that.

Regards,
Pavel

Regarding flashing and using rootfs on NAND, I will recommend UBIFS. See the below pointers for more info:

processors.wiki.ti.com/.../AM335x_NAND_Driver's_Guide
processors.wiki.ti.com/.../Linux_Core_NAND_User's_Guide

processors.wiki.ti.com/.../UBIFS_Support

processors.wiki.ti.com/.../AM335x_U-Boot_User's_Guide
processors.wiki.ti.com/.../AM335x_U-Boot_User's_Guide

processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide

Note also that you can crate your own rootfs (ubi file) or use the pre-built one that come with the TI SDK (they are two ubi files actually):

{SDK}/filesystem/
arago-base-tisdk-image-am335x-evm.ubi
tisdk-rootfs-image-am335x-evm.ubi

See the below wiki page for how to flash in NAND:
processors.wiki.ti.com/.../Smart_Home_and_Energy_Gateway_Software_Manual

For the difference between these two filesystems (tisdk and arago) see the below wiki page:
processors.wiki.ti.com/.../EZSDK_Filesystems

Regards,
Pavel

Naveen,

After the below set of commands (which we see are working fine):

U-Boot # mmc rescan

U-Boot # nand erase.chip

U-Boot # load mmc 0 0x81000000 MLO

U-Boot # nand write 0x81000000 NAND.SPL

U-Boot # nand write 0x81000000 NAND.SPL.backup1

U-Boot # nand write 0x81000000 NAND.SPL.backup2

U-Boot # nand write 0x81000000 NAND.SPL.backup3

U-Boot # load mmc 0 0x81000000 u-boot.img

U-Boot # nand write 0x81000000 NAND.u-boot

U-Boot # load mmc 0 0x81000000 zImage

U-Boot # nand write 0x81000000 NAND.kernel

U-Boot # run findfdt

U-Boot # load mmc 0 0x81000000 $fdtfile

U-Boot # nand write 0x81000000 NAND.u-boot-spl-os

U-Boot # saveenv

Can you try the below commands. Try these after the above commands. Do not restart (power off/on the board), stay in this u-boot prompt:

U-Boot # printenv

U-Boot # mtdparts

U-Boot # load mmc 0 0x81000000 arago-base-tisdk-image-am335x-evm.ubi

U-Boot # nand write 0x81000000 0x780000 0x2EE0000

Provide me full console log.

Regards,
Pavel