[OpenWrt-Devel] unielec U7628-01 different version won't boot

[davidea]

hi,

i bought a second unit from this brand, one in may and one in august, i 
discovered (confirmed from their support) that they ship the router with 
two flavour , one with breed bootloader  that i know is almost fully 
compatible with openwrt 18.06.1 (doesn't work the wifi AP mode) and a 
second version with u-boot bootloader

this second version , won't work with the same firmware , and if you 
flash it , you brick the router (but you can flash the original firmware 
loading it via TFTP and serial consolle)


the breed version has

  OpenWrt 18.06.1, r7258-5eb055306f
  -----------------------------------------------------
root at OpenWrt:~# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00030000 00010000 "bootloader"
mtd1: 00010000 00010000 "config"
mtd2: 00010000 00010000 "factory"
mtd3: 00fb0000 00010000 "firmware"
mtd4: 0015cf19 00010000 "kernel"
mtd5: 00e530e7 00010000 "rootfs"
mtd6: 00a00000 00010000 "rootfs_data"

i have limited remote access to this router

the uboot bootloader have a 57600 serial speed, then i clone the openwrt 
tree and change the serial speed into the dts file from 115200 to 57600 
, i enabled in menuconfig target image -> ramdisk and compile

but when i try to load in ram (or flash it) i have some problem

here the bootlog


https://pastebin.com/fNaQJRaQ


at line 1 the ram loading

at line 120 the flash and boot from flash

if needed i can share the serial bootlog for the original firmware

someone can point me in the right direction?

i cc the author of the commit that introduce the support for the breed 
version, i hope is tollerate


thanks

davidea


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