=> saveenv
Saving Environment to MMC... Writing to MMC(0)... OK
=> boot
switch to partitions #0, OK
mmc0 is current device
switch to partitions #0, OK
mmc0 is current device
reading boot.scr
** Unable to read file boot.scr **
** Invalid partition 3 **
reading uImage
11566264 bytes read in 619 ms (17.8 MiB/s)
Booting from mmc ...
reading x1-minimal.dtb
** Unable to read file x1-minimal.dtb **
## Booting kernel from Legacy Image at 82000000 ...
   Image Name:   Linux-4.9.133-at3
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    11566200 Bytes = 11 MiB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
FDT and ATAGS support not compiled in - hanging
### ERROR ### Please RESET the board ###

U-Boot SPL 2016.07-at17 (Jul 25 2018 - 19:00:03)
Trying to boot from MMC1

U-Boot 2016.07-at17 (Jul 25 2018 - 19:00:03 +0900)

CPU:   Freescale i.MX7D rev1.2 at 996MHz
CPU:   Extended Commercial temperature grade (-20C to 105C) at 37C
Reset cause: POR
       Watchdog enabled
I2C:   ready
DRAM:  512 MiB
Boot Source: SD
Board Type: Armadillo-IoT G3L(0a200000)
Revision: 0002
S/N: 2078
DRAM: 00001d05
XTAL: 00
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... OK
In:    serial
Out:   serial
Err:   serial
Found PFUZE300! deviceid 0x30, revid 0x11
Net:   FEC0
=>