[ath9k-devel] ath9K is not recognising AR9220 card (wlm200nx) on 3.15

[Ed W <lists@wildgooses.com>]

Hi, I'm struggling to figure out how to debug this, grateful for advice

I have a PCEngines Alix with a wlm200nx wifi card. This should have an 
AR9220 chip in it and be detected by the ath9k driver.  I have built my 
own kernel using linux-3.15.10, however, the ath9k driver isn't 
"recognising" or otherwise appearing to bind to the hardware, even when 
ath9k is modprobe'd

lspci shows:

     00:0c.0 "Class 0280" "168c" "0029" "168c" "2096"

dmesg, shows very little in addition, just a boot time:
     pci 0000:00:0c.0: [168c:0029] type 00 class 0x028000

lsmod
ath9k                  46564  0
mac80211              198136  1 ath9k
ath9k_common            5364  1 ath9k
ath9k_hw              327804  2 ath9k,ath9k_common
ath                    11888  3 ath9k,ath9k_common,ath9k_hw
cfg80211              126984  4 ath9k,mac80211,ath9k_common,ath


Relevant bits of .config are:

CONFIG_ATH9K_HW=m
CONFIG_ATH9K_COMMON=m
CONFIG_ATH9K_BTCOEX_SUPPORT=y
CONFIG_ATH9K=m
CONFIG_ATH9K_PCI=y
CONFIG_ATH9K_AHB=y
CONFIG_ATH9K_DEBUGFS=y
# CONFIG_ATH9K_STATION_STATISTICS is not set
# CONFIG_ATH9K_WOW is not set
# CONFIG_ATH9K_HTC is not set

I see nothing in syslog when loading the module (well, just one line 
"Calling CRDA to ...").  I have tried adding debug=0xfffffff module 
parameter and that doesn't show anything additional.


I would be extremely grateful for help debugging this further. I'm not 
sure how to debug the module loading to see why it's not recognising the 
hardware.

Note, the same kernel is successfully loading and using a ralink USB 
wifi device, so I don't believe I have completely borked wifi. rfkill is 
disabled (but I don't believe that affects module loading and 
binding?).  Have I missed some firmware?  Do I need some additional 
module included?

Very grateful for any help

Thanks

Ed W