ath10k - spectral scan - and - channel change

[Will Kerr]

pinging and compacting the Q just in case the experts have an idea on this..


Is it possible to control spectral_scan_ctl whilst in AP mode?
my result:

root at OpenWrt:~# echo disable > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
ash: write error: No such device

or 


change channel whilst in Monitor mode?
my result:

root at OpenWrt:~# iw dev wlan0 set channel 112
command failed: Device or resource busy (-16)

Thanks Will.





________________________________
From: Will Kerr <willjkerr at yahoo.co.uk>
To: "ath10k at lists.infradead.org" <ath10k at lists.infradead.org> 
Sent: Friday, 24 February 2017, 6:49
Subject: ath10k - spectral scan - and - channel change


Hello, I searched the mail archives but couldn't find a clue to my question so here it is:

Im interested in performing a spectral scan of as much of the spectrum as possible, and quickly. this means scanning a channel for some time, changing channels, and repeating. 


Background: when configuring an ath9k radio to Monitor mode, it is possible to do 2 things:

1) change wifi channel via command line, e.g. iw dev wlan1 set channel 3. This does it seemingly quickly, without taking down the interface (good)

2) control the debugfs files like  /sys/kernel/debug/ieee80211/phy1/ath9k/spectral_scan_ctl (good)


The problem is:

ath10k, in Monitor mode, I am only able to change channels - 1) iw dev wlan0 set channel 104, but not access the debugfs files  2) (which is essential to control and obtain the spectral scan result)
the error I get is:

root at OpenWrt:~# echo disable > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
ash: write error: No such device



ath10k, in AP mode, The opposite occurs - I am only able to access debugfs files  2) , but not change channel 1), which is annoying because I cant then scan the entire possible range. 


the error I get is one of: 

root at OpenWrt:~# iw dev wlan0 set channel 112

command failed: Device or resource busy (-16)
or
root at OpenWrt:~# iw dev wlan0 set channel 104
command failed: Invalid argument (-22)



Is there anything I can do to get both working?

Thanks. Will