Lets go back a little bit in time. In the times when the OpenWrt and LEDE fork happened on april-may 2016, I don't remember the exact date, in that time, after the fork, both projects seem to have working in different repos and accepting pull request for devices in each project independently. The Linksys E2100L pull request and support got accepted in the OpenWrt project on Nov-30-2016 and snapshots were generated in that time trunk bleeding edge, in that time we could download snapshot images for the E2100L in the OpenWrt project page
Then the merge of both projects happen, and merged the majority of supported devices, one of the devices that could not see support in LEDE was the E2100L, for some reason this device was not merged in LEDE, and in current Openwrt trunk builds, there is no support for this device.
Now that we came back to the present from our time travel, and that the both projects seems to be joining in one (OpenWrt) again, I think that can be cool that this device could be official supported again in OpenWrt.
Hi jeff. Yes, they are in theory the same board except for the amount of RAM, but the images for the WRT160NL couldn't be flashed in the E2100L directly, people and i have tried this before in the old OpenWrt forum and this guy here in the LEDE forum, we were happy wen they add E2100L support.
Yes, I'm worried for the ar71xx port to the ath79 (for this device), because the developers became to start porting the already supported ar71xx boards to the new ath79 profile and maybe is the last chance that this device is getting support. (If some developer could correct me)I think that It could require less work add the already accepted code to the ar71xx profile and then, in the future jump to the ath79 profile, that ask to add this device directly to the ath79 profile, there are still ar71xx pull requests that got accepted
I'd offer what you've found to the OpenWRT mailing list, as well as your willingness to test the builds (as you may be one of the few with the physical hardware).
let's try this over the ath79 thread, but yet again, this one has a realtek switch, but maybe on this one you could run tft and bootm without flashing it
but the problem could be the flash layout if you don't have a dmesg with openwrt