Hi Mike,
Mike Thompson wrote,

> With a basic build of OpenADK for the Raspberry Pi 3, I'm getting the following
> error when I try to bring up wlan0.
>
> # ifup wlan0
> ip: SIOCGIFFLAGS: No such device
> command failed: No such device (-19)
> Successfully initialized wpa_supplicant
> Could not read interface wlan0 flags: No such device
> nl80211: Driver does not support authentication/association or connect commands
> nl80211: deinit ifname=wlan0 disabled_11b_rates=0
> Could not read interface wlan0 flags: No such device
> wlan0: Failed to initialize driver interface
> ip: SIOCGIFFLAGS: No such device
>
> In /etc/network/interface, I have the following configured:
>
> auto wlan0
> iface wlan0 inet dhcp
>   wireless-ssid HomeWiFi
>   wireless-mode sta
>   wireless-security wpa2
>   wireless-passphrase XXXXXXXXXXXX
>
> I presume there is an additional configuration for OpenADK required to enable
> wlan0 on the Raspberry Pi 3, but I don't see anything obvious.  I have the 'iw'
> and 'wpa_supplicant' packages enabled, but that doesn't seem to be the issue.
>
> Any tips on what I might be missing?

I do not think you missed anything, it is just a Bug.
I once started to try to make it work, but got distracted.
I look into it again. Strange thing, I installed Libreelec for
Testing on my RPI3 and even this did not recognized the Wifi device.
I am starting now with Raspbian to see what I am missing.

Hard to find an detailed information, which Linux kernel config
symbols are required and what firmware files need to be installed.

best regards
 Waldemar