Imx8mm cannot connect to wifi

[fu_qiang]

Debug ap6255 chip on the board of IMx8mm. At present, the system is Yocto and the kernel version is 4.1.98. Only after configuring the device tree, wifi can be pulled up.But I found an error using WPA_supplicant when Connecting to wifi. Do I need to add another CONFIG or formula？Here is the error reporting part .thanks

root@imx8mmevk:/# wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL control device
rfkill: Cannot get wiphy information
root@imx8mmevk:/#

[igorpadykov]

Hi Fu

for wpa_supplicant usage one can look at latest wifi Linux Manual on link

wireless.murata.com/eng/products/rf-modules-1/wi-fi-bluetooth-for-freescale-i-mx.html

Best regards
igor
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