I have two copies of a board I'm working with which I have already added support for by creating the appropriate dts and dtsi files. It is tested and working fine on another copy of the board I have. Next I flashed an image with the MPTCP kernel patch onto another copy of the board and after I did that it will not boot. Did I accidentally overwrite something I wasn't supposed to? Or is this evidence that the boards are actually not identical? I don't think there's any way for me to recover this; all I have is a serial cable and I cannot even get to the uboot menu.
===================================================================
MT7621 stage1 code 13:14:00 (ASIC)
CPU=50000000 HZ BUS=16666666 HZ
==================================================================
Change MPLL source from XTAL to CR...
do MEMPLL setting..
MEMPLL Config : 0x21100000
3PLL mode + External loopback
=== XTAL-40Mhz === DDR-1066Mhz ===
PLL3 FB_DL: 0x10, 1/0 = 518/506 41000000
PLL4 FB_DL: 0x10, 1/0 = 527/497 41000000
PLL2 FB_DL: 0x14, 1/0 = 521/503 51000000
do DDR setting..[00320000]
Apply DDR3 Setting...(use customer AC)
0 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120
--------------------------------------------------------------------------------
0000:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0001:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0002:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0003:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0004:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0005:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0006:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0007:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0008:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0009:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000A:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000B:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000C:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000D:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
000E:| 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1
000F:| 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0
0010:| 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0
0011:| 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
0012:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0013:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0014:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0015:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0016:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0017:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0018:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0019:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001A:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001B:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001C:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001D:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001E:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001F:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
rank 0 coarse = 16
rank 0 fine = 40
B:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
cannot find opt_dle value
[EMI] DRAMC calibration failed
=====================DBG=====================
[000] = 44694683 [004] = f07486a1 [008] = 03046948 [00c] = 0a000000
[010] = 00008888 [014] = 00008888 [018] = 0e0e0e0e [01c] = 00000000
[020] = 00000000 [024] = 00000000 [028] = f1200f01 [02c] = 55010000
[030] = 33000fff [034] = 55020000 [038] = 33000fff [03c] = 55000000
[040] = aa0007ff [044] = 9f0f0481 [048] = 0000d10d [04c] = 00000000
[050] = 00000000 [054] = 00000000 [058] = 00000000 [05c] = 00000000
[060] = 00000000 [064] = 00000000 [068] = 00000000 [06c] = 00000000
[070] = 00000000 [074] = 00000000 [078] = 00000000 [07c] = c287227d
[080] = 00000000 [084] = 00000000 [088] = 00000400 [08c] = 00000000
[090] = 00000000 [094] = 28282828 [098] = 00000000 [09c] = 00000000
[0a0] = 00000000 [0a4] = 00000000 [0a8] = 00000000 [0ac] = 00000000
[0b0] = 00000000 [0b4] = 00000000 [0b8] = aa00aa00 [0bc] = aa00aa00
[0c0] = 00000000 [0c4] = 00000000 [0c8] = 00000000 [0cc] = 00000000
[0d0] = 07070000 [0d4] = 00000000 [0d8] = 00300900 [0dc] = 83000000
[0e0] = 14000000 [0e4] = 000022b3 [0e8] = 00000000 [0ec] = 00000000
[0f0] = 00000000 [0f4] = 01000000 [0f8] = edcb000f [0fc] = 07100000
[100] = 00000000 [104] = 00000000 [108] = 00000000 [10c] = 00000000
[110] = 00051100 [114] = 00000000 [118] = 00000000 [11c] = 00000000
[120] = 00000000 [124] = 80000000 [128] = 00000000 [12c] = 00000000
[130] = 30000000 [134] = 00000000 [138] = 00000000 [13c] = 00000000
[140] = 00000000 [144] = 00000000 [148] = 00000000 [14c] = 00000000
[150] = 00000000 [154] = 00000000 [158] = 00000000 [15c] = 00000000
[160] = 00000000 [164] = 00000000 [168] = 00000080 [16c] = 00000000
[170] = 00000000 [174] = 00000000 [178] = 00000000 [17c] = 00000000
[180] = 00000000 [184] = 00000000 [188] = 00000000 [18c] = 00000000
[190] = 00000000 [194] = 00000000 [198] = 00000000 [19c] = 00000000
[1a0] = 00000000 [1a4] = 00000000 [1a8] = 00000000 [1ac] = 00000000
[1b0] = 00000000 [1b4] = 00000000 [1b8] = 00000000 [1bc] = 00000000
[1c0] = 00000000 [1c4] = 00000000 [1c8] = 00000000 [1cc] = 00000000
[1d0] = 00000000 [1d4] = 00000000 [1d8] = 00c80008 [1dc] = 15602842
[1e0] = 8c000000 [1e4] = 00001000 [1e8] = 00000240 [1ec] = 00000000
[1f0] = 00000000 [1f4] = 00020100 [1f8] = 00000000 [1fc] = 00000000
[200] = 88888888 [204] = 88888888 [208] = 88888888 [20c] = 88888888
[210] = 00000000 [214] = 00000000 [218] = 00000000 [21c] = 00000000
[220] = 00000000 [224] = 00000000 [228] = 00000000 [22c] = 00000000
[230] = 00000000 [234] = 00000000 [238] = 00000000 [23c] = 00000000
[240] = 00000000 [244] = 00000000 [248] = 00000000 [24c] = 00000000
[250] = 00000000 [254] = 00000000 [258] = 00000000 [25c] = 00000000
[260] = 00000000 [264] = 00000000 [268] = 00000000 [26c] = 00000000
[270] = 00000000 [274] = 00000000 [278] = 00000000 [27c] = 00000000
[280] = 00002092 [284] = 00000000 [288] = 0000035e [28c] = 00001bfb
[290] = 00000000 [294] = 00000015 [298] = 00001c00 [29c] = 00000000
[2a0] = 00000010 [2a4] = 00001c00 [2a8] = 0000f9f8 [2ac] = 000005f8
[2b0] = 4751b609 [2b4] = 07549adf [2b8] = 00135c06 [2bc] = 00000000
[2c0] = 00000000 [2c4] = 00000000 [2c8] = 00000000 [2cc] = 00000000
[2d0] = 00000000 [2d4] = 00000000 [2d8] = 00000000 [2dc] = 00000000
[2e0] = 00000000 [2e4] = 00000000 [2e8] = 00000000 [2ec] = 00000000
[2f0] = 00000000 [2f4] = 00000000 [2f8] = 00000000 [2fc] = 00000000
[300] = 00000000 [304] = 00000000 [308] = 00000000 [30c] = 00000000
[310] = 00000000 [314] = 00000000 [318] = 00000000 [31c] = 00000000
[320] = 00000000 [324] = 00000000 [328] = 00000000 [32c] = 00000000
[330] = 00000000 [334] = 00000000 [338] = 00000000 [33c] = 00000000
[340] = 00000000 [344] = 00000000 [348] = 00000000 [34c] = 00000000
[350] = 00000000 [354] = 00000000 [358] = 00000000 [35c] = 00000000
[360] = 00000000 [364] = 00000000 [368] = 00000000 [36c] = 00000000
[370] = 00000000 [374] = 00000000 [378] = 00000000 [37c] = 00000000
[380] = 00000000 [384] = 00000000 [388] = 00000000 [38c] = 00000003
[390] = 00000003 [394] = 00000000 [398] = 00000000 [39c] = 00000000
[3a0] = 0e0e0e0e [3a4] = 00000000 [3a8] = 00000000 [3ac] = 00000000
[3b0] = 00000000 [3b4] = 00000000 [3b8] = 00000300 [3bc] = 00000000
[3c0] = 00000000 [3c4] = 00000000 [3c8] = 00000000 [3cc] = 00000000
[3d0] = 00000000 [3d4] = 00000000 [3d8] = 00000000 [3dc] = 80000000
[3e0] = 00000000 [3e4] = 00000000 [3e8] = 00000000 [3ec] = 00000000
[3f0] = 00000000 [3f4] = 00000000 [3f8] = 00000000 [3fc] = 00000000
[600] = 0e141985 [604] = 00040113 [608] = 000000e0 [60c] = 00090468
[610] = 00000000 [614] = 03200400 [618] = c20008da [61c] = 51000000
[620] = 00000000 [624] = c20008da [628] = 41000000 [62c] = 00000000
[630] = c20008da [634] = 41000000 [638] = 00000000 [63c] = 00000000
[640] = 00000230 [644] = 00000000 [648] = c2005ab2 [64c] = 00000000
[650] = 00000000 [654] = 00000000 [658] = 00000000 [65c] = 00000000
=============================================
===================================================================
MT7621 stage1 code done
CPU=50000000 HZ BUS=16666666 HZ
===================================================================
U-Boot 1.1.3 (Jun 26 2014 - 19:18:24)
Board: Ralink APSoC DRAM: 64 kB
relocate_code Pointer at: 7ffc8000