ramips: mt7621 novel art_block partition

Heppler, J. Scott shep971 at centurylink.net
Sun Jul 26 21:30:41 EDT 2020

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

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