ramips: mt7621 novel art_block partition

[Heppler, J. Scott]

I came onto a Trendnet TEW-827DRU Version 2 that is MT7621an with
MT7615E x 2 wifi chips.  I was able to get UART output and stock has
these partitions:

[    2.512000] 0x000000000000-0x000001000000 : "ALL"
[    2.520000] 0x000000000000-0x000000030000 : "Bootloader"
[    2.532000] 0x000000030000-0x000000040000 : "Config"
[    2.544000] 0x000000040000-0x000000050000 : "Factory"
[    2.552000] 0x000000050000-0x000000ef0000 : "firmware"
[    2.564000] 0x000000050000-0x000000380000 : "kernel"
[    2.576000] 0x000000380000-0x000000ef0000 : "rootfs"
[    2.584000] 0x000000ef0000-0x000000ff0000 : "rootfs_data"
[    2.596000] 0x000000ff0000-0x000001000000 : "art_block"

I reviewed all the mt7621 *dts files and none have an art_block.
My understanding is that for Qualcomm, the art* partition contains
Atheros calibration data. I'm lost as to what and art_block is on a
mediatek device.  Trendnet can be lazy with partition naming - the
TEW-810 has a partion referred to a D-Link.

I did find a "firmware2" partition -
mt7621_asus_rt-acx5p.dtsi, a "second_config" - mt7621_mtc_wr1201.dts
that are about the same size and position.


Are there any Mediatek experts that can enlighten me and point me in the
right direction?

Thanks in advance
-- 
J. Scott Heppler