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Linux/PROCESSOR-SDK-AM335X: Fail to set PLT power mode on while running calibrator plt calibrate

Part Number: PROCESSOR-SDK-AM335X

Tool/software: Linux

While running this command  "calibrator plt calibrate" i am getting the following ERROR: Fail to set PLT power mode on 

The steps i followed : 

STEP 1: calibrator set ref_nvs <ini file>

STEP 2: cp new-nvs.bin /lib/firmware/ti-connectivity/wl1271-nvs.bin

STEP3: calibrator plt calibrate

here i am getting error: Fail to set PLT power mode on 

I don'thave wl12xx_sdio module.is it mandatory or wlcore_sdio module is enough to do wifi calibration.

i am using kernel version 4.4

CONFIG_NL80211_TESTMODE =y 

FYI@    

root@phycore-ge-am335x:/# lsmod
Module Size Used by
hci_uart 20708 1
bluetooth 318365 2 hci_uart
wl12xx 53313 0
wlcore 164487 1 wl12xx
mac80211 327516 2 wl12xx,wlcore
cfg80211 197448 2 mac80211,wlcore
wlcore_sdio 5858 0
ipv6 314751 23
root@phycore-ge-am335x:#

Thanks in advance.