Hello Tony,
Please, set the SW3, SW4 
and SW8 switch as follows to be able to detect the NAND.
Best regards,
Kemal
Still the same.
SW8 all on OFF side
do I need to so something on command line?
my board is REV 1.2A.
Kemal,
I found a similar post your followed before: https://e2e.ti.com/support/processors/f/791/p/683793/2530829
On my side, also can't recognize NAND on UBOOT:
If it works on your side, please help to do a nand test:
/usr/bin/ nandtest -k /dev/mtd**
Because customer said on a OLD version SDK(Linux version 3.2.0+ ), there is bug on NAND driver:
ECC corrections: 0
ECC failures : 0
Bad blocks : 0
BBT blocks : 0
00020000: reading...
ECC failed at 00020000
00020000: reading...
Now plan to upgrade SDK, wants to ensure the bug is fixed on latest SDK.
Tony,
I'm afraid your EVM may just be too old. I booted my rev 2.1 board and was able to see the NAND with no problems.
Here is the U-Boot output:
U-Boot 2018.01-g9d984f4548 (Apr 06 2019 - 07:42:30 +0000)
CPU : AM335X-GP rev 2.1
Model: TI AM335x EVM
DRAM: 1 GiB
NAND: 256 MiB
MMC: OMAP SD/MMC: 0
*** Warning - bad CRC, using default environment
And here is Linux:
root@am335x-evm:~# dmesg | grep nand
[ 0.184952] omap-gpmc 50000000.gpmc: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/nandflash_pins_s0, deferring probe
[ 1.529280] omap2-nand 8000000.nand: GPIO lookup for consumer rb
[ 1.529289] omap2-nand 8000000.nand: using device tree for GPIO lookup
[ 1.529334] of_get_named_gpiod_flags: parsed 'rb-gpios' property of node '/ocp/gpmc@50000000/nand@0,0[0]' - status (0)
[ 1.529523] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[ 1.535947] nand: Micron MT29F2G08ABAEAWP
[ 1.540103] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
[ 1.547827] nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme
[ 1.553315] 10 ofpart partitions found on MTD device omap2-nand.0
[ 1.559461] Creating 10 MTD partitions on "omap2-nand.0":
root@am335x-evm:~# cat /proc/mtd
dev: size erasesize name
mtd0: 00020000 00020000 "NAND.SPL"
mtd1: 00020000 00020000 "NAND.SPL.backup1"
mtd2: 00020000 00020000 "NAND.SPL.backup2"
mtd3: 00020000 00020000 "NAND.SPL.backup3"
mtd4: 00040000 00020000 "NAND.u-boot-spl-os"
mtd5: 00100000 00020000 "NAND.u-boot"
mtd6: 00020000 00020000 "NAND.u-boot-env"
mtd7: 00020000 00020000 "NAND.u-boot-env.backup1"
mtd8: 00800000 00020000 "NAND.kernel"
mtd9: 0f600000 00020000 "NAND.file-system"
I believe I had the board configured in it's default state, but to be most clear here is what I have:
Profile Selection:
Sysboot Pins:
I hope this helps you.
