A customer has a Colibri iMX7S 256MB V1.1B module that won’t boot.
Customer sent it to us and upon powering on the board, the module automatically goes into recovery mode.
I tried booting TEZI and installing a Linux image. The process goes smoothly, but apparently nothing is flashed. After rebooting, the module goes back to recovery mode.
There’s this “device nand0 not found” message in the serial output during boot:
U-Boot 2016.11-1.5.0+g087e95a (May 07 2018 - 13:36:58 +0000)
CPU: Freescale i.MX7S rev1.2 at 792MHz
CPU: Extended Commercial temperature grade (-20C to 105C) at 38C
Reset cause: POR
DRAM: 256 MiB
PMIC: RN5T567 LSIVER=0x01 OTPVER=0x0d
MMC: FSL_SDHC: 0
Using default environment
In: serial
Out: serial
Err: serial
Model: Toradex Colibri iMX7S/D
Model: Toradex Colibri iMX7S
Serial Downloader recovery mode, using sdp command
Net: FEC0
Error: FEC0 address not set.
Hit any key to stop autoboot: 0
SDP: initialize...
SDP: handle requests...
Downloading file of size 21370832 to 0x82100000... done
Downloading file of size 307 to 0x82000000... done
Jumping to header at 0x82000000
Header Tag is not a IMX image
## Loading kernel from FIT Image at 82100000 ...
Using 'config@imx7s' configuration
Trying 'kernel@1' kernel subimage
Description: Linux Kernel 4.1
Type: Kernel Image
Compression: uncompressed
Data Start: 0x821000dc
Data Size: 5308608 Bytes = 5.1 MiB
Architecture: ARM
OS: Linux
Load Address: 0x81000000
Entry Point: 0x81000000
Hash algo: md5
Hash value: 062c6a5e34cb42445eebddd1923fe02a
Verifying Hash Integrity ... md5+ OK
## Loading ramdisk from FIT Image at 82100000 ...
Using 'config@imx7s' configuration
Trying 'ramdisk@1' ramdisk subimage
Description: SquashFS RAMdisk
Type: RAMDisk Image
Compression: uncompressed
Data Start: 0x82610284
Data Size: 15925248 Bytes = 15.2 MiB
Architecture: ARM
OS: Linux
Load Address: unavailable
Entry Point: unavailable
Hash algo: md5
Hash value: a3b8e467022be3227e370eea748f782a
Verifying Hash Integrity ... md5+ OK
## Loading fdt from FIT Image at 82100000 ...
Using 'config@imx7s' configuration
Trying 'fdt@imx7s' fdt subimage
Description: Colibri iMX7 Solo Device Tree
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x83540358
Data Size: 44041 Bytes = 43 KiB
Architecture: ARM
Hash algo: md5
Hash value: 91332626cadf189b4fe255eeedc1e89b
Verifying Hash Integrity ... md5+ OK
Booting using the fdt blob at 0x83540358
Loading Kernel Image ... OK
Loading Device Tree to 8dd44000, end 8dd51c08 ... OK
Updating MTD partitions...
Device nand0 not found!
Starting kernel ...
[ 0.298457] fec 30be0000.ethernet (unnamed net_device) (uninitialized): Inva0
[ 0.314472] imx_usb 30b10000.usb: Can't register ci_hdrc platform device, er7
[ 0.529008] rtc-ds1307 3-0068: hctosys: unable to read the hardware clock
Running /etc/rc.local...
Colibri-iMX7_ToradexEasyInstaller_1.5-20180507
Welcome to Toradex Easy Installer
Which makes me think it’s probably related to NAND. Is there any way I can inspect the NAND further considering that I can only access TEZI or recovery mode?
Also, when interrupting the TEZI boot, mtdparts also gives the “device nand0 not found” message. It also seems that TEZI won’t recognize the NAND, since the tooltip on the install button says something like “install the selected image to SD card”.
Thanks,
Gustavo.