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I just flashed 15.05.1 last night to one of my Gateway 7001 APs. Unfortunately there are no wireless interfaces available to configure when there should be two. I have three Gateway 7001s and have been running OpenWRT since 2010 and this is the first time I have encountered this problem.

There is no wireless option in LuCI
And there is no wireless config file in /etc/config/

On this page
https://wiki.openwrt.org/doc/uci/wireless
Note3: In case your image does not contain the driver for your wireless chipset, simply install them with opkg and proceed with Regenerate Configuration.

However looking at the opkg list I don't see atheros drivers.

Please let me know if there are additional commands to run to further diagnose or is there is just a package I need to install. Thank you.

Solved:

First

opkg install pciutils

So I could run lspci to determine the wireless cards installed.

root@OpenWrt:~# lspci
00:01.0 Ethernet controller: Qualcomm Atheros AR5212/AR5213 Wireless Network Adapter (rev 01)
00:02.0 Ethernet controller: Qualcomm Atheros AR5212/AR5213 Wireless Network Adapter (rev 01)

I determined I needed the ath5k driver by verifying it with this page
https://wiki.debian.org/ath5k

opkg install kmod-ath5k

I then tried to detect the wireless cards which didn't work until after I reboot the device

root@OpenWrt:~# wifi detect > /etc/config/wireless
root@OpenWrt:~# ls /etc/config/
dhcp      dropbear  firewall  luci      network   rpcd      system    ucitrack  uhttpd    wireless
root@OpenWrt:~# cat /etc/config/wireless
root@OpenWrt:~# reboot

root@OpenWrt:~# cat /etc/config/wireless
config wifi-device  radio0
        option type     mac80211
        option channel  11
        option hwmode   11g
        option path     'pci0000:00/0000:00:01.0'
        option htmode
        # REMOVE THIS LINE TO ENABLE WIFI:
        option disabled 1

config wifi-iface
        option device   radio0
        option network  lan
        option mode     ap
        option ssid     OpenWrt
        option encryption none

config wifi-device  radio1
        option type     mac80211
        option channel  36
        option hwmode   11a
        option path     'pci0000:00/0000:00:02.0'
        option htmode
        # REMOVE THIS LINE TO ENABLE WIFI:
        option disabled 1

config wifi-iface
        option device   radio1
        option network  lan
        option mode     ap
        option ssid     OpenWrt
        option encryption none

I could now configure wireless in LuCI, but was unable to utilize WPA2 until I installed wpad-mini

root@OpenWrt:~# opkg install wpad-mini
Installing wpad-mini (2015-03-25-1) to root...
Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ixp4xx/generic/packages/base/wpad-mini_2015-03-25-1_ixp4xx.ipk.
Configuring wpad-mini.

Once this was installed I rebooted again and successfully set up wifi

To clean up I

opkg remove lspci

(Last edited by 7001 on 12 May 2016, 12:23)